CN117559125A

CN117559125A - Electronic equipment

Info

Publication number: CN117559125A
Application number: CN202311797869.9A
Authority: CN
Inventors: 张云帆; 吴小浦
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2023-12-25
Filing date: 2023-12-25
Publication date: 2024-02-13

Abstract

According to the electronic device, the first radiator is arranged on the first side edge, and the first free end of the first radiator is located between the first grounding end and the top edge; one end of the first matching circuit is electrically connected with the first feed point; at least one return point is positioned at the first grounding end and/or the first matching circuit; the distance between the at least one return point and the center line of the reference floor is less than or equal to 1/8 wavelength of the satellite communication frequency band; the signal source is configured to be electrically connected with the first feed point through the first matching circuit, the first excitation signal is used for exciting a first resonant mode formed on the first radiator to support a satellite communication frequency band, and exciting at least a first current and a second current formed on the reference floor, the first current forms a first radiation lobe facing the top edge, the second current forms a second radiation lobe facing the bottom edge, and the electronic device has good communication quality in the satellite communication frequency band.

Description

Electronic equipment

Technical Field

The application relates to the technical field of communication, in particular to electronic equipment.

Background

In satellite communication, how to design an electronic device with an antenna having better satellite frequency band communication quality becomes a technical problem to be solved.

Disclosure of Invention

The application provides electronic equipment with good communication quality in a satellite communication frequency band.

The application provides an electronic equipment, including frame, reference floor and antenna assembly, the frame is including the topside, first side, base and the second side that connect gradually, reference floor locates in the frame, reference floor has the central line that extends along width direction, antenna assembly includes:

the first radiator is arranged on the first side edge and comprises a first grounding end, a first feed point and a first free end, the first free end is positioned between the first grounding end and the top edge, the first grounding end is electrically connected with the reference floor, and the first grounding end is positioned in a hand holding area of the first side edge so as to be in contact with a hand when the electronic equipment is in a handheld state;

a first matching circuit electrically connected to the first feed point;

the signal source is used for providing a first excitation signal of a satellite communication frequency band; and

At least one return point, at least one return point is positioned at the first grounding end and/or the first matching circuit; at least one of the return points is less than or equal to 1/8 wavelength of a satellite communication band in a direction parallel to the first side edge from a center line of the reference floor;

The signal source is configured to be electrically connected to the first feeding point via the first matching circuit, the first excitation signal is used for exciting a first resonant mode formed on the first radiator to support the satellite communication frequency band, and exciting at least a first current and a second current formed on the reference floor, the first current flows from the return point to the top edge, the second current flows from the return point to the bottom edge, the first current forms a first radiation lobe towards the top edge, and the second current forms a second radiation lobe towards the bottom edge.

According to the electronic equipment, the first radiating body is arranged on the first side edge, the first free end of the first radiating body is located between the first grounding end and the top edge, and the first grounding end is located in the hand holding area of the first side edge so as to be in contact with the hand when the electronic equipment is in a handheld state; one end of the first matching circuit is electrically connected with the first feed point; at least one return point is positioned at the first grounding end and/or the first matching circuit; the distance between the at least one return point and the center line of the reference floor is less than or equal to 1/8 wavelength of the satellite communication frequency band; when the signal source is configured to be electrically connected with the first feed point through the first matching circuit, the signal source excites the first radiator to form a first resonance mode supporting a satellite communication frequency band, and excites the reference floor to form at least first current and second current, wherein the first current flows to the top edge from the return point, the second current flows to the bottom edge from the return point, the first current forms a first radiation lobe facing the top edge, the second current forms a second radiation lobe facing the bottom edge, and the electronic equipment has good communication quality in the satellite communication frequency band.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is a partially exploded schematic illustration of an electronic device provided in an embodiment of the present application;

FIG. 3 is a back view of an electronic device provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of an antenna assembly according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a monopole antenna of a side satellite antenna according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an IFA antenna of a side satellite antenna according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a side satellite antenna according to an embodiment of the present application as a capacitive coupling feed antenna;

FIG. 8 is a schematic diagram of a current distribution of a signal source configured to electrically connect a first feed point via a first matching circuit provided in an embodiment of the present application;

FIG. 9 is a radiation pattern of a first radiator in a first resonant mode provided in an embodiment of the present application;

FIG. 10a is a back view of another electronic device provided in an embodiment of the present application;

FIG. 10b is a radiation pattern of a first radiator in a first resonant mode after being held by a hand according to an embodiment of the present application;

FIG. 11 is a schematic diagram of a current distribution of a 3/2 symmetric dipole structure formed for IFA nodes and reference floors at the top edge provided in an embodiment of the present application;

FIG. 12 is a top edge forming a radiation pattern for an IFA stub+reference floor provided by an embodiment of the present application;

FIG. 13 is a schematic view of a first radiator provided in an embodiment of the present application with a midpoint location that may correspond to a centerline of a reference floor;

FIG. 14 is a schematic view of the structure of the center line L of the reference floor at the boundary between the first floor and the second floor provided in the embodiment of the present application;

fig. 15 is a schematic diagram of current distribution of an antenna assembly when the circuit board provided in the embodiment of the present application has a plurality of hollowed-out parts;

fig. 16 is a schematic diagram of an overlapped electric field when the first grounding end is contacted with the hand according to the embodiment of the present application;

fig. 17 is a schematic structural diagram of an antenna assembly according to an embodiment of the present application further including a second radiator;

FIG. 18 is an S-parameter and efficiency curve of a first radiator and a second radiator provided in an embodiment of the present application to form a dual-wave resonance under excitation of a signal source;

fig. 19 is a simulation diagram of SAR hot spot when the first radiator provided in the embodiment of the present application operates in a satellite communication band;

fig. 20 is a schematic structural diagram of an antenna assembly according to an embodiment of the present application, including a switch switching circuit;

Fig. 21 is a schematic structural diagram of an antenna assembly according to an embodiment of the present application further including a third radiator, a fourth radiator, and a second matching circuit;

fig. 22 is a schematic diagram showing a detailed structure of an antenna assembly according to an embodiment of the present disclosure, which further includes a third radiator, a fourth radiator, and a second matching circuit;

FIG. 23 is a 3D radiation pattern on a reference floor with a fourth ground electrically connected to a first reference edge provided in an embodiment of the present application;

FIG. 24 is a plan view of the 3D radiation pattern of FIG. 23 when unfolded;

fig. 25 is a schematic diagram of an overlapped electric field when the fourth grounding end provided in the embodiment of the present application contacts the hand;

fig. 26 is a 3D radiation pattern of the third radiator and the fourth radiator provided in the embodiment of the present application in a satellite communication scenario of a person's head and hands;

fig. 27 is a 2D radiation pattern of the third radiator and the fourth radiator in a satellite communication scene of a person in head and hand according to an embodiment of the present application;

fig. 28 is a schematic structural diagram of a T-type antenna provided by an embodiment of the present application;

fig. 29 is a schematic structural diagram of a signal source provided in an embodiment of the present application, including a mobile communication chip and a satellite communication chip, and a second matching circuit including a second switch and a second impedance tuning branch.

Reference numerals illustrate:

an electronic device 1000; an antenna assembly 100; a display screen 200; a middle frame 300; a rear cover 400; a middle plate 310; a frame 320; a top edge 321; a bottom edge 322; a first side 323; a second side 324; a reference floor 500; a first radiator 11; a first matching circuit M1; a signal source 20; return to the point 30; a first ground terminal A1; a first feeding point B1; a first free end C1; a matching element P1; a first floor 501; a second floor 502; a battery 700; a hollowed-out portion 610; a second radiator 12; a second free end C2; a second ground terminal A2; a first coupling slit N1; a switch switching circuit 40; a first switch M11; a first impedance tuning branch M12; a third radiator 13; a fourth radiator 14; a second matching circuit M2; a third free end C3; a third feeding point B3; a third ground terminal A3; a fourth free end C4; a fourth ground terminal A4; a second coupling slit N2; a first floor area 510; a second floor area 520; a third floor area 530; a first reference edge 503; a second reference edge 504; a fifth free end C5; a second matching circuit M2; a second switch M2; the second impedance tuning branch M22.

Detailed Description

The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. It is apparent that the embodiments described herein are only some embodiments, not all embodiments. All other embodiments, which can be made by a person of ordinary skill in the art based on the embodiments provided herein without any inventive effort, are within the scope of the present application.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will appreciate explicitly and implicitly that the embodiments described herein may be combined with other embodiments.

The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example: an assembly or device incorporating one or more components is not limited to the listed one or more components, but may alternatively include one or more components not listed but inherent to the illustrated product, or one or more components that may be provided based on the illustrated functionality.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device 1000 according to an embodiment of the present application. The electronic device 1000 includes, but is not limited to, a device having a communication function such as a mobile phone, tablet computer, notebook computer, wearable device, unmanned aerial vehicle, robot, digital camera, etc. In the embodiment of the present application, a mobile phone is taken as an example for illustration, and other electronic devices may refer to the embodiment.

Referring to fig. 2, fig. 2 is a partially exploded schematic illustration of an electronic device 1000. The electronic device 1000 includes an antenna assembly 100, and the operating environment of the antenna assembly 100 is illustrated by taking the electronic device 1000 as a mobile phone. The electronic device 1000 includes a display 200, a middle frame 300, and a rear cover 400, which are sequentially disposed in a thickness direction. The middle frame 300 includes a middle plate 310 and a frame 320 surrounding the middle plate 310. The bezel 320 may be a conductive bezel. Of course, in other embodiments, the electronic device 1000 may not have the midplane 310. The display 200, the middle plate 310 and the back cover 400 are sequentially stacked, and an accommodating space is formed between the display 200 and the middle plate 310 and between the middle plate 310 and the back cover 400 to accommodate devices such as a circuit board, a camera module, a receiver module, a battery, various sensors and the like. One side of the frame 320 is connected to the edge of the display screen 200 in a surrounding manner, and the other side of the frame 320 is connected to the edge of the rear cover 400 in a surrounding manner, so as to form a complete appearance structure of the electronic device 1000. In this embodiment, the frame 320 and the middle plate 310 are integrally formed, and the frame 320 and the rear cover 400 may be in a split structure, which is the working environment of the antenna assembly 100, for example, a mobile phone, but the antenna assembly 100 of the present application is not limited to the working environment.

Referring to fig. 3, fig. 3 is a back view of the electronic device 1000. The frame 320 includes a top side 321, a bottom side 322, and a first side 323 and a second side 324 connected to the top side 321 and the bottom side 322. The top edge 321 is a side away from the ground when the user holds the electronic device 1000 with his/her hand and erects a screen, and the bottom edge 322 is a side facing the ground when the user holds the electronic device 1000 with his/her hand and erects a screen. The first side 323 is the left side of the electronic device 1000 when the user holds the electronic device with his/her hand and erects a screen. The second side 324 is the right side of the electronic device 1000 when the user holds the electronic device and erects the screen. Of course, the first side 323 may be the right side of the electronic device 1000 when the user holds the electronic device. The second side 324 is the left side of the electronic device 1000 when the user holds the electronic device.

Optionally, referring to fig. 3, the electronic device 1000 further includes a reference floor 500. The reference floor 500 is provided within the rim 320. The reference floor 500 is generally rectangular in shape. Because devices are arranged in the mobile phone or other structures are avoided as required, various grooves, holes and the like are formed on the reference ground edge of the reference floor 500. The reference floor 500 includes, but is not limited to, a metal alloy portion that is the midplane 310 and a reference ground metal portion of a circuit board (including motherboard and sub-boards). In general, the reference ground system in the electronic device 1000 may be equivalently a generally rectangular shape, and is therefore referred to as a reference floor 500. The reference floor 500 does not indicate that the shape of the reference ground is plate-shaped and is a rectangular plate. The reference floor has a center line extending in the width direction, which divides the reference floor into an upper half and a lower half which are equal in length direction.

The specific structure of the antenna assembly 100 is illustrated in the following with reference to the accompanying drawings.

Referring to fig. 3 and 4, the antenna assembly 100 includes a first radiator 11, a first matching circuit M1, a signal source 20, and at least one return point 30.

The material of the first radiator 11 is not particularly limited in this application. Optionally, the material of the first radiator 11 is a conductive material, including but not limited to a conductive material such as a metal, an alloy, and the like. The shape of the first radiator 11 is not particularly limited in this application. For example, the shape of the first radiator 11 includes, but is not limited to, a bar shape, a sheet shape, a rod shape, a coating shape, a film shape, and the like. The first radiator 11 shown in fig. 3 is only an example and is not intended to limit the shape of the first radiator 11 provided in the present application. In this embodiment, the first radiators 11 are all in a strip shape. The extending track of the first radiator 11 is not limited in this application. Alternatively, the first radiator 11 may extend in a straight line, or in a curved line, or in a bending line. In other embodiments, the first radiator 11 may also extend along a trajectory such as a bending line. The first radiator 11 may be a line with a uniform width on the extending track, or may be a bar with a gradual width change and a widening area, etc.

The form of the first radiator 11 is not particularly limited in this application. Optionally, the first radiator 11 includes, but is not limited to, a metal frame that is a metal of the frame 320, a metal frame that is embedded in a plastic of the frame 320, a metal radiator that is located in or on the frame 320, a flexible circuit board antenna that is formed on a flexible circuit board (Flexible Printed Circuit board, FPC), a laser direct formed antenna that is directly formed by laser (Laser Direct Structuring, LDS), a printed direct formed antenna that is directly formed by printing (Print Direct Structuring, PDS), a conductive patch antenna (e.g., a metal bracket antenna), and the like. In this embodiment, the first radiator 11 is taken as a part of the frame 320 of the electronic device 1000.

Optionally, referring to fig. 3, the first radiator 11 is disposed on the first side edge 323. In other embodiments, the first radiator 11 may also be disposed on the second side 324. The first side 323 and the second side 324 are long sides of the electronic device 1000.

Referring to fig. 4, the first radiator 11 includes a first ground terminal A1, a first feeding point B1, and a first free end C1.

The free end refers to the end that is disconnected from the other conductive parts of the frame 320 by an insulation break and from the reference floor. In order to ensure structural strength of the frame 320 of the electronic device 1000, the insulating break is filled with an insulating material.

Referring to fig. 4, the first grounding terminal A1 is electrically connected to the reference floor 500. The grounding terminal is used herein to electrically connect the reference floor 500, wherein the electrical connection manner includes, but is not limited to, direct electrical connection or indirect electrical connection. For example, the first grounding end A1 is grounded back through a grounding spring. For another example, the first ground end A1 of the first radiator 11 is integrally interconnected with a portion of the reference floor 500.

The specific position of the first feeding point B1 is not limited herein, for example, the first feeding point B1 may be disposed at the first ground end A1, or the first feeding point B1 may be disposed between the first ground end A1 and the first free end C1.

Referring to fig. 3 and 4, the first free end C1 is located between the first ground end A1 and the top edge 321. In other words, the direction from the first grounding end A1 to the first free end C1 is the direction pointing to the side of the top edge 321. In this embodiment, the first free end C1 is located between the first grounding end A1 and the top edge 321, so as to avoid the first free end C1 from being "held" by a hand when the hand holds the electronic device 1000. Since the hand is in contact with the first free end C1, the energy absorption at the first free end C1 is more, which results in a "holding" of the first free end C1, and a larger frequency offset or inefficiency of the antenna.

Referring to fig. 3 and 4, the first matching circuit M1 is electrically connected to the first feeding point B1. One end of the first matching circuit M1 is electrically connected to the first feeding point B1, and the other end of the first matching circuit M1 is directly or indirectly electrically connected to the signal source 20. The first matching circuit M1 includes at least one of a capacitance and an inductance, and the first matching circuit M1 facilitates the signal source 20 to excite a corresponding resonant mode on the first radiator 11 by adjusting the impedance matching between the port of the signal source 20 and the port of the first radiator 11.

The signal source 20 is configured to provide at least a first excitation signal in a satellite communications band. The signal source 20 is electrically connected to the first feeding point B1 through the first matching circuit M1. In other words, the first radiator 11 is a side satellite antenna.

The signal source 20 includes, but is not limited to, a radio frequency transceiver chip or the like. The signal source 20 is configured to provide a radio frequency excitation current, and after the radio frequency excitation current is transmitted to the first radiator 11, the first radiator 11 can be excited to generate a resonant current, so as to form a resonant mode, so as to support a frequency band corresponding to the resonant current.

In this embodiment, the signal source 20 is disposed on the circuit board 600. The signal source 20 is electrically connected to the first feeding point B1 through the first matching circuit M1. The electrical connection between the first matching circuit M1 and the first feeding point B1 includes, but is not limited to, via a coaxial line, a conductive spring, and the like. Specifically, the first matching circuit M1 is electrically connected to the first feeding point B1 through a feeding spring (conductive spring) provided on the circuit board 600.

Optionally, at least one return point 30 is disposed at the first ground terminal A1 and/or the first matching circuit M1. At least one of the return points 30 is spaced from the center line L of the reference floor 500 in a direction parallel to the first side 323 by a distance less than or equal to 1/8 wavelength of a satellite communication band. The distance between the return point 30 and the center line L of the reference floor 500 is, for example, 1/10 wavelength of the satellite communication band, 1/16 wavelength of the satellite communication band, 1/20 wavelength of the satellite communication band, 0, or the like.

If the distance between the return point 30 and the center line L of the reference floor 500 in the direction parallel to the first side 323 is greater than 1/8 wavelength of the satellite communication band. For example, the first radiator 11 is disposed near the top edge 321, which results in a distance between the first ground end A1 and the bottom edge 322 being greater than 1/2 wavelength of the satellite communication band, so that two radiation lobes are formed by the current between the first ground end A1 and the bottom edge 322, and one radiation lobe is formed by the current between the first ground end A1 and the top edge 321, so that three radiation lobes are finally formed, and the radiation energy of the reference floor 500 is dispersed, so that it is inconvenient for the radiation lobes of the two subsequently formed radiation lobes to be inverted to the radiation lobe of the bottom edge 322 and then to be strengthened to the radiation lobe of the top edge 321, thereby realizing beam broadening of the top edge 321.

Optionally, referring to fig. 5, the first ground terminal A1 is the first feeding point B1. In other words, the side satellite antenna is a monopole antenna. The first matching circuit M1 includes a grounded matching element P1, where one end of the matching element P1 is electrically connected to the first feeding point B1, and the other end is electrically connected to the reference floor 500. The first feeding point B1 is also a ground terminal. The matching element P1 includes, but is not limited to, an inductance or a capacitance. Although the first matching circuit M1 and the matching element P1 are shown separately in fig. 5, the matching element P1 is a part of the first matching circuit M1. In this embodiment, the number of return points 30 is one, and the return point 30 is located at the other end of the first matching circuit M1, i.e. the matching element P1. Wherein the distance between the return point 30 and the center line L of the reference floor 500 is less than or equal to 1/8 wavelength of the satellite communication band.

Still alternatively, referring to fig. 6, the first feeding point B1 is located between the first ground terminal A1 and the first free terminal C1, and a distance between the first feeding point B1 and the first ground terminal A1 is smaller than a distance between the first feeding point B1 and the first free terminal C1. In other words, the side satellite antenna is an IFA antenna. The first grounding end A1 is located between the center line L of the reference floor 500 and the bottom edge 322.

In this embodiment, the first grounding terminal A1 is one return point 30. When the first matching circuit M1 includes a grounded matching element P1, the first matching circuit M1 includes another return point 30. Although the first matching circuit M1 and the matching element P1 are shown separately in fig. 6, the matching element P1 is a part of the first matching circuit M1. Optionally, the first ground terminal A1 is located between the center line L of the reference floor 500 and the bottom edge 322, and a distance between the first ground terminal A1 and the center line L of the reference floor 500 is less than or equal to 1/8 wavelength of the satellite communication frequency band. The first matching circuit M1 (the first feeding point B1) is located between the center line L of the reference floor 500 and the top edge 321, and a distance between the first matching circuit M1 (the first feeding point B1) and the center line L of the reference floor 500 is less than or equal to 1/8 wavelength of the satellite communication frequency band.

Still alternatively, referring to fig. 7, the first feeding point B1 is located between the first ground end A1 and the first free end C1, and a distance between the first feeding point B1 and the first ground end A1 is greater than or equal to a distance between the first feeding point B1 and the first free end C1. The first matching circuit M1 includes a capacitive element, and the first matching circuit M1 is electrically connected to the first feeding point B1 through the capacitive element. In other words, the side satellite antenna is a capacitive coupling feed antenna.

In this embodiment, the first ground terminal A1 is the return point 30. Optionally, the first ground terminal A1 is located between the center line L of the reference floor 500 and the bottom edge 322, and a distance between the first ground terminal A1 and the center line L of the reference floor 500 is less than or equal to 1/8 wavelength of the satellite communication frequency band. The first free end C1 is located between the center line L of the reference floor 500 and the top edge 321.

Still alternatively, referring to fig. 8, the signal source 20 is configured to be electrically connected to the first feeding point B1 via the first matching circuit M1, and the first excitation signal is used to excite the first radiator 11 to form a first resonant mode supporting the satellite communication band, and to excite the reference floor 500 to form at least a first current J1 and a second current J2.

Optionally, the satellite communication frequency band is 1.98GHz-2.2GHz. Optionally, the electrical length of the first radiator 11 is close to or 1/4 wavelength of the satellite communication band. The first resonant mode is a 1/4 wavelength mode. Meanwhile, the main current distribution formed on the reference floor 500 is: the first current J1 flows from the return point 30 to the top edge 321 and the second current J2 flows from the same or another return point 30 to the bottom edge 322. The primary current mode on the reference floor 500 is a longitudinal current mode. In addition, the reference floor 500 has a third current J3 flowing from the return point 30 to the second side 324. The intensity of the third current J3 is much smaller than the intensity of the first current J1 and also much smaller than the intensity of the second current J2. In addition, the reference floor 500 has a weak current directed obliquely upward and a weak current directed obliquely downward from the return point 30.

The electrical length described in this application may satisfy the following formula:

where L is the physical length, a is the transmission time of the electrical or electromagnetic signal in the medium, and b is the transmission time in the free scene.

Referring to fig. 9, the radiation pattern of the first radiator 11 in the first resonant mode is: the first current J1 forms a first radiation lobe F1 that is directed toward the top edge 321. The second current J2 forms a second radiation lobe F2 towards the bottom edge 322.

According to the electronic device 1000 provided by the application, the first radiator 11 is designed to be disposed on the first side edge 323, and the first free end C1 of the first radiator 11 is located between the first grounding end A1 and the top edge 321. One end of the first matching circuit M1 is electrically connected to the first feeding point B1. The return point 30 is located at the first ground terminal A1. Alternatively, one return point 30 is located at the first ground terminal A1, and the other return point 30 is located at the first matching circuit M1. The distance between at least one of the return points 30 and the center line L of the reference floor 500 is less than or equal to 1/8 wavelength of the satellite communication band. The signal source 20 is configured to electrically connect the first feeding point B1 via the first matching circuit M1, where the signal source 20 excites the first radiator 11 to form a first resonant mode supporting a satellite communication band, and excites the reference floor 500 to form at least a first current J1 and a second current J2, the first current J1 flowing from the return point 30 to the top side 321 and the second current J2 flowing from the return point 30 to the bottom side 322, the first current J1 forming a first radiation lobe F1 towards the top side 321, and the second current J2 forming a second radiation lobe F2 towards the bottom side 322. The electronic device 1000 has better communication quality in the satellite communication frequency band.

The embodiment of the application further provides the electronic device 1000, where the electronic device 1000 includes a reference floor 500, the frame 320, a circuit board 600, the first matching circuit M1, and the first radiator 11. The reference floor 500, the frame 320 and the first radiator 11 may refer to the reference floor 500, the frame 320 and the first radiator 11, respectively.

Referring to fig. 2, the frame 320 is disposed around the reference floor 500. The frame 320 includes the top edge 321, the first side edge 323, the bottom edge 322, and the second side edge 324 connected in sequence. The frame 320 and the reference floor 500 together enclose a first accommodating space W1 and a second accommodating space W2. Further, a portion of the frame 320, the first floor 510 of the reference floor 500, and a portion of the rear cover together enclose a first accommodating space W1. The other part of the frame 320, the second floor 520 of the reference floor 500 and the other part of the rear cover together define a second accommodating space W2. The first accommodating space W1 is adjacent to the top edge 321, and the second accommodating space W2 is used for accommodating the battery 700. Optionally, the dimensions of the first accommodating space W1 and the second accommodating space W2 in the direction parallel to the first side 323 are similar or the same, for example, the difference is less than 10mm.

The circuit board 600 is disposed in the first accommodating space W1. The circuit board 600 may be the motherboard described above. The circuit board 600 is provided with the signal source 20, and the signal source 20 may refer to the foregoing description. The signal source 20 is configured to provide a first excitation signal in a satellite communications band.

Referring to fig. 10a, a connection point S1 electrically connected to the signal source 20 is disposed on a region of the circuit board 600 away from the top edge 321 and close to the first side edge 323. The connection point S1 may be provided with a feeding spring. Further, the connection point S1 may be provided at an edge of the circuit board 600 near the side of the battery 700. For example, the distance between the connection point S1 and the side of the circuit board 600 near the battery 700 is less than 10mm.

The first matching circuit M1 is electrically connected between the signal source 20 and the connection point S1, and the first matching circuit M1 will be described in detail later.

Referring to fig. 10a, the first radiator 11 is disposed on the first side 323. The first radiator 11 includes the first ground terminal A1, the first feeding point B1 and the first free terminal C1. The first feeding point B1 is disposed opposite to the connection point S1 in a direction parallel to the top edge 321. Specifically, the first feeding point B1 is opposite to the connection point S1 in a direction parallel to the top edge 321, or the first feeding point B1 is slightly different from the connection point S1 in a direction parallel to the first side edge 323.

Referring to fig. 10a, the first matching circuit M1 is electrically connected to the signal source 20 through the connection point S1, and the first ground terminal A1 is located at a side of the first feeding point B1 away from the top edge 321. The orthographic projection of the first grounding terminal A1 in the direction parallel to the top edge 321 is located in the area where the battery 700 is located. In other words, the first ground terminal A1 is located at one side of the battery 700.

Referring to fig. 10a, the first free end C1 is located between the first feeding point B1 and the top edge 321. The first free end C1 is located at one side of the circuit board 600.

Referring to fig. 10a, the signal source 20 is configured to feed the first excitation signal to the first radiator 11 via the first matching circuit M1 to excite the first radiator 11 and the reference floor 500 to form a first resonant mode supporting the satellite communication band, where the first resonant mode forms at least a first current J1 and a second current J2 on the reference floor 500, and the first current J1 flows from a position on the reference floor 500 corresponding to the connection point S1 to the top edge 321. Specifically, the first current J1 flows from the orthographic position of the connection point S1 on the reference floor 500 toward the top edge 321.

The second current J2 flows from the position on the reference floor 500 corresponding to the connection point S1 toward the bottom edge 322. Specifically, the second current J2 flows from the orthographic projection position of the connection point S1 on the reference floor 500 toward the bottom edge 322.

The first current J1 forms a first radiation lobe F1 toward the top edge 321 and the second current J2 forms a second radiation lobe F2 toward the bottom edge 322.

According to the electronic device 1000 provided by the application, the first radiator 11 is designed to be disposed on the first side edge 323, and the first free end C1 of the first radiator 11 is located between the first grounding end A1 and the top edge 321. One end of the first matching circuit M1 is electrically connected to the first feeding point B1. The frame 320 and the reference floor 500 together enclose a first accommodating space W1 and a second accommodating space W2. The first accommodating space W1 is adjacent to the top edge 321, and the second accommodating space W2 is used for accommodating the battery 700. A connection point S1 electrically connected to the signal source 20 is provided in a region of the circuit board 600 distant from the top edge 321 and close to the first side edge 323. The first feeding point B1 is disposed opposite to the connection point S1 in a direction parallel to the top edge 321. The signal source 20 is configured to electrically connect the first feeding point B1 via the first matching circuit M1, where the signal source 20 excites the first radiator 11 to form a first resonant mode supporting a satellite communication band, and excites the reference floor 500 to form at least a first current J1 and a second current J2, the first current J1 flowing from the return point 30 to the top side 321 and the second current J2 flowing from the return point 30 to the bottom side 322, the first current J1 forming a first radiation lobe F1 towards the top side 321, and the second current J2 forming a second radiation lobe F2 towards the bottom side 322. The electronic device 1000 has better communication quality in the satellite communication frequency band.

The reference floor 500 includes a centerline L that is parallel to the top edge 321. The orthographic projection of the first ground terminal A1 on the reference floor 500 is located on a side of the center line L of the reference floor 500 facing away from the top edge 321. The connection point S1 is located between the center line L of the reference floor 500 and the top edge 321. Alternatively, the boundary between the battery 700 and the circuit board may be the center line L of the reference floor 500 or the distance from the center line of the reference floor 500 is less than 10mm.

Referring to fig. 3 and 4, the first grounding end A1 is located in a hand holding area of the first side 323, where the hand holding area is an area of the first side that contacts a hand in the handheld call scenario of the electronic device 1000. The first grounding terminal A1 contacts with a hand when the electronic device 1000 is in a handheld state.

Alternatively, referring to fig. 3 and 4, the first side 323 is divided into two parts by a straight line where the center line L of the reference floor 500 is located, wherein the part of the first side 323 corresponding to the center line L of the reference floor 500 and the bottom edge 322 is a hand holding area. The hand holding area is an area where the electronic device 1000 is held by a hand in a handheld state, so the first grounding end A1 is disposed in the hand holding area of the first side 323, and the first grounding end A1 contacts with the hand when the electronic device 1000 is in the handheld state, so as to perform a hand loading function. The loading effect of the hand on the first grounding terminal A1 will be described in detail later.

Referring to fig. 10b, the second radiation lobe F2 is inverted toward the side of the top edge 321 when the electronic device 1000 is in a hand-held call scenario. In other words, when the first grounding end A1 contacts the hand, the second radiation lobe F2 is reversed to be biased to the side of the top edge 321, the reversed second radiation lobe F2 merges with the first radiation lobe F1 to form a third radiation lobe F3 facing the side of the top edge 321, and the third radiation lobe F3 faces the side of the top edge 321 and has a larger beam coverage. The antenna assembly provided by the embodiment of the application has a beam broadening effect on the side where the top edge 321 is located after being held by a hand, so that the upper hemispherical duty ratio of the satellite communication frequency band is improved.

Referring to fig. 11, assume that the top edge 321 is an IFA stub and the reference floor 500 is used to form a 3/2 symmetric dipole structure. The electrical length of the first radiator 11 is close to 1/4 wavelength of the center frequency point of the satellite communication frequency band. The electrical length of the reference floor 500 in the length direction is approximately 5/4 wavelength of the center frequency point of the satellite communication band. The sum of the electrical lengths of the first radiator 11 and the electrical length of the reference floor 500 in the length direction is approximately 3/2 wavelength of the center frequency point of the satellite communication frequency band. The first radiator 11 and the reference floor 500 form 3 1/2 wavelengths in the length direction, and each 1/2 wavelength corresponds to one radiation lobe.

Referring to fig. 12, according to the current distribution on the reference floor 500 and IFA branches, the radiation field formed by the IFA satellite antenna of the top side 321 and the reference floor 500 is divided into three radiation lobes in the longitudinal direction, a first sub-radiation lobe Q1, a second sub-radiation lobe Q2 and a third sub-radiation lobe Q3.

Referring to fig. 8, in the embodiment of the present application, the position of the first radiator 11 in the length direction of the reference floor 500 is designed, specifically, the return point 30 of the first radiator 11 is located near the middle position of the reference floor 500, so as to break the original 3/2 symmetric dipole current distribution on the reference floor 500, and the current on the reference floor 500 is mainly divided into two parts, namely a first current J1 and a second current J2.

Optionally, the working mode of the first current J1 is a 1/2 wavelength mode of the satellite communication frequency band, and the working mode of the second current J2 is a 1/2 wavelength mode of the satellite communication frequency band. Each 1/2 wavelength of the satellite communication band corresponds to one radiation lobe, the current between the return point 30 and the top edge 321 corresponds to one radiation lobe, and the current between the return point 30 and the bottom edge 322 corresponds to the other radiation lobe, so that the first radiator 11 and the reference floor 500 form two radiation lobes in the first resonance mode, and the formation of other side lobes is reduced. And the two radiation lobes are convenient for the subsequent fusion superposition of the downward radiation lobe and the upward radiation lobe after the inversion, so as to enhance the beam broadening of the upward radiation lobe.

Optionally, referring to fig. 13, the first grounding end A1 is located on a side of the center line L of the reference floor 500 away from the top edge 321, and the first feeding point B1 is located between the center line L of the reference floor 500 and the top edge 321. Since the portion of the first side 323 corresponding to the portion between the center line L of the reference floor 500 and the bottom edge 322 is a hand grip region. The first side edge 323 corresponds to an area between the center line L of the reference floor 500 and the top edge 321 that is at least partially not easily grasped by a hand. In this embodiment, the electronic device 1000 may be in a handheld state, where the first grounding end A1 is loaded by a hand and contacts the hand, so as to reverse the downward radiation lobe to the upward direction; and the first free end C1 cannot be held by hands, so that the antenna function is realized.

Alternatively, referring to fig. 13, the midpoint of the first radiator 11 may be located at a position corresponding to the center line L of the reference floor 500. Since the electrical length of the first radiator 11 is 1/4 wavelength of the satellite communication band. At this time, the distance between the first grounding end A1 and the center line L of the reference floor 500 is 1/8 wavelength of the satellite communication band, and the electrical length between the first grounding end A1 and the bottom edge 322 is 1/2 wavelength of the satellite communication band, so that the second current J2 between the first grounding end A1 and the bottom edge 322 just forms a radiation lobe, and other side lobes are reduced.

Further, referring to fig. 13, the first feeding point B1 is close to the first free end C1, the first matching circuit M1 may be provided with another return point 30, so that the distance between the return point 30 in the first matching circuit M1 and the center line L of the reference floor 500 is 1/8 wavelength of the satellite communication band, and further, the electrical length between the return point 30 in the first matching circuit M1 and the top edge 321 is 1/2 wavelength of the satellite communication band, so that the first current J1 between the return point 30 and the top edge 321 in the first matching circuit M1 just forms a radiation lobe, and other side lobes are reduced. The working mode of the first current J1 can be a 1/2 wavelength mode of the satellite communication frequency band, and the working mode of the second current J2 is a 1/2 wavelength mode of the satellite communication frequency band.

Alternatively, referring to fig. 14, the reference floor 500 includes a first floor 501 and a second floor 502 that are integrally connected. The first floor 501 is used for setting a circuit board 600 of the electronic device 1000 or a circuit board 600 including the electronic device 1000. The second floor 502 is used for setting a battery 700 of the electronic device 1000. At least part of the first current J1 is formed on the first floor 501, and at least part of the second current J2 is formed on the second floor 502. Optionally, the boundary between the first floor 501 and the second floor 502 is the center line L of the reference floor 500. Optionally, at least one return point 30 of the first radiator 11 is close to or located at a boundary between a first floor 501 and a second floor 502, such that at least part of the first current J1 is formed at the first floor 501 and at least part of the second current J2 is formed at the second floor 502. Optionally, the first floor 501 is a circuit board ground, i.e. the circuit board 600. The second floor 502 is a battery 700 floor that carries the battery 700. Wherein the boundary between the circuit board 600 and the battery 700 is the boundary between the first floor 501 and the second floor 502. At least one of the return points 30 of the first radiator 11 is close to or at the boundary between the circuit board 600 and the battery 700. The "proximity" described in this embodiment may be a wavelength having an electrical length less than or equal to 1/8 of the target frequency band.

In this embodiment, referring to fig. 15, since the circuit board has a plurality of hollowed-out portions 610, the hollowed-out portions 610 are used for setting a camera module, a receiver, a face recognition module, a light sensor, etc. The battery 700 has a relatively complete floor with few or no hollowed-out portions 610, so that the current intensity of the second current J2 on the reference floor 500 is stronger than that of the first current J1, further, referring to fig. 9, the intensity of the second radiation lobe F2 is stronger than that of the first radiation lobe F1, and the second radiation lobe F2 is the main lobe.

Referring to fig. 9, when the first grounding end A1 is not touched by a hand, the main lobe direction of the first radiator 11 faces the bottom edge 322, which is not beneficial to satellite communication.

Referring to fig. 10b, in this embodiment, by designing the positions of the first grounding end A1 and the first free end C1 of the first radiator 11, not only two radiation lobes are designed, but also an electric field formed by overlapping a hand electric field between the first radiator 11 and the reference floor 500 is formed when the electronic device 1000 is held by a hand, so as to synthesize an electric field directed to the top edge 321, and the second radiation lobe F2 is reversed to the side of the top edge 321.

Specifically, referring to fig. 16, a first electric field E1 is formed between the first radiator 11 and the reference floor 500. The first electric field E1 is directed in a direction in which the first radiator 11 is directed to the reference floor 500, i.e. horizontally to the left in the drawing. The first ground terminal A1 of the first radiator 11 forms a second electric field E2 when in contact with the hand. The second electric field E2 is directed inward (in the thickness direction of the electronic device 1000) perpendicular to the paper surface. The direction of the second electric field E2 is perpendicular to the direction of the first electric field E1. The first electric field E1 and the second electric field E2 form two perpendicular circular polarization components. The first electric field E1 and the second electric field E2 combine to form a third electric field E3 facing the side of the top edge 321. The third electric field E3 is directed in a direction in which the bottom edge 322 points toward the top edge 321. The second radiation lobe F2 faces to the side of the top edge 321 under the action of the third electric field E3, the second radiation lobe F2 merges with the first radiation lobe F1 to form a radiation lobe facing to the side of the top edge 321 after inversion, the radiation lobe faces to the side of the top edge 321, the beam range covers larger, and then the left-hand circularly polarized main lobe faces to the back cover and deviates to the direction of the top edge 321 in the hand-held human head-hand scene, and after hand holding, the beam broadening effect on the side of the top edge 321 is achieved, so that the upper hemisphere duty ratio of the satellite communication frequency band is improved.

Optionally, referring to fig. 17, the antenna assembly 100 further includes a second radiator 12. The second radiator 12 includes the second free end C2 and a second ground end A2. A first coupling gap N1 is formed between the second free end C2 and the first free end C1. The second radiator 12 is coupled to the first radiator 11. The first radiator 11 is a main radiator, and the second radiator 12 is a parasitic radiator.

The material, shape, form, etc. of the second radiator 12 can be referred to as the material, shape, form, etc. of the first radiator 11.

Optionally, the first coupling slit N1 is an insulation break slit, and the width of the first coupling slit N1 is 0.5-2 mm, but is not limited to this size. The first radiator 11 and the second radiator 12 can be capacitively coupled through a first coupling gap N1. In one of the angles, the first radiator 11 and the second radiator 12 may be regarded as two portions formed by the frame 320 partitioned by the first coupling slit N1.

The first radiator 11 and the second radiator 12 are capacitively coupled through a first coupling gap N1. The "capacitive coupling" means that an electric field is generated in the first coupling gap N1 between the first radiator 11 and the second radiator 12, the signal of the first radiator 11 can be transmitted to the second radiator 12 through the electric field, and the signal of the second radiator 12 can be transmitted to the first radiator 11 through the electric field, so that the first radiator 11 and the second radiator 12 can be electrically connected even in a state of not being directly electrically connected.

Alternatively, referring to fig. 17, the electrical length of the second radiator 12 is smaller than the electrical length of the first radiator 11. The second radiator 12 and the first radiator 11 form dual-wave resonance under the excitation of the first signal source 20, so that the resonance mode on the second radiator 12 improves the efficiency of the satellite communication frequency band supported by the first radiator 11.

Referring to fig. 18, fig. 18 is an S-parameter and efficiency curve of the first radiator 11 and the second radiator 12 forming dual-wave resonance under the excitation of the signal source 20 according to the embodiment of the present application. Wherein curve a is an S-parameter curve of the first radiator 11 and the second radiator 12 forming a dual-wave resonance under the excitation of the signal source 20. The resonance point of the first resonance mode is 1.98GHz. The resonance point of the resonance mode of the second radiator 12 is about 2.63 GHz. Curve b is a radiation efficiency curve of the first radiator 11 and the second radiator 12 forming a dual-wave resonance under the excitation of the signal source 20. Curve c is the overall efficiency curve of the first radiator 11 and the second radiator 12 forming a dual-wave resonance under excitation of the signal source 20. From the overall efficiency curve, the antenna assembly 100 has a high efficiency in the satellite communications band.

Referring to fig. 19, fig. 19 is a simulation diagram of SAR hot spot when the first radiator 11 provided in the embodiment of the present application operates in a satellite communication band. It can be seen that the top edge 321 satellite antenna is in close proximity to the ear during satellite communications with the human head and hand, as compared to the top edge 321 satellite antenna. In this embodiment, the first radiator 11 is disposed on the upper half of the first side 323. The distance H2 between the side satellite antenna and the eye is greater than the distance between the top satellite antenna and the ear. The side satellite antenna is relatively far from the ear and the eye, so that the super SAR risk of the side satellite antenna is lower. Where SAR is an abbreviation for Specific Absorption Rate, chinese means specific absorption rate.

Optionally, the signal source 20 is configured such that the maximum SAR value when the first radiator 11 provides the first excitation signal is less than 1.5W/KG.

Specifically, when the first radiator 11 provided in the embodiment of the present application works in the satellite communication frequency band, the detected maximum SAR value is 11.8W/KG when the input power is 36dBm, the free efficiency is-2.6 dB, and the duty cycle is 100%. The working efficiency of the actual antenna is calculated to be-5.5 dB, and the maximum SAR value is 1.18W/KG and is smaller than the standard 1.5W/KG under the condition that the duty ratio is 20%. Namely, the side satellite antenna provided by the embodiment has no super SAR risk.

The signal source 20 is configured to provide the first excitation signal to the first radiator 11 when the electronic device 1000 is in a satellite conversation scenario with the human head and hands. The satellite communication scene of the head and hand refers to a scene of holding the electronic device 1000 near the head to perform satellite communication, in this scene, since the electronic device 1000 is near the head, the satellite antenna at the top edge 321 is closely attached to the head, and the medium loading of the head may cause the satellite antenna at the top edge 321 to be frequency offset or not working, and have a super SAR risk. The side satellite antenna provided in this embodiment, and when the electronic device 1000 is in a satellite communication scenario, the signal source 20 is configured to provide the first excitation signal for the first radiator 11, so as to avoid the problem that the top edge 321 satellite antenna may be frequency offset or not working due to the medium loading of the head, and the side satellite antenna has no super SAR risk.

Optionally, the signal source 20 is further configured to provide a second excitation signal in the MHB frequency band. The signal source 20 is configured such that, when the first radiator 11 provides the second excitation signal, the second excitation signal is used to excite the first radiator 11 to form a third resonance mode supporting the first MHB frequency band, and to excite the second radiator 12 to form a fourth resonance mode supporting the second MHB frequency band. Alternatively, the first MHB band includes, but is not limited to, a B1 band, and the second MHB band includes, but is not limited to, a B41 band.

In this embodiment, the signal source 20 is capable of providing not only the first radiator 11 with the first excitation signal in the satellite communication band, but also the signal source 20 is capable of providing the first radiator 11 with the second excitation signal in the mobile communication band. The signal source 20 is configured to provide the first excitation signal and the second excitation signal in a time-sharing manner. Specifically, after the electronic device 1000 receives the condition of triggering the satellite connection, the signal source 20 provides a first excitation signal of the satellite communication frequency band for the first radiator 11, and after the electronic device 1000 closes the satellite connection, or when the satellite connection is closed and the mobile communication connection is triggered, the signal source 20 provides a second excitation signal of the mobile communication frequency band for the first radiator 11, where the size of the mobile communication frequency band is about 1.5 GHz to 2.5GHz, and further, the mobile communication frequency band is the MHB frequency band, so that the first radiator 11 is multiplexed into an antenna supporting the satellite communication frequency band and the MHB frequency band in a time-sharing manner.

Optionally, referring to fig. 20, the antenna assembly 100 includes a switching circuit 40, and the switching circuit 40 is electrically connected to the signal source 20 and the first matching circuit M1. Optionally, the signal source 20 includes a mobile communication chip 22 and a satellite communication chip 21. The switch switching circuit 40 is used for conducting the mobile communication chip 22 and the first matching circuit M1 to provide a second excitation signal for the first radiator 11. The switch switching circuit 40 is used for conducting the satellite communication chip 21 and the first matching circuit M1 to provide a first excitation signal for the first radiator 11.

The first matching circuit M1 includes a first switch M11 and at least one first impedance tuning branch M12 electrically connected to the first switch M11. The number of first impedance tuning branches M12 is one or more. The first impedance tuning branch M12 includes, but is not limited to, an inductance, or a capacitance. When the number of the first impedance tuning branches M12 is plural, the impedance of at least two first impedance tuning branches M12 is different, or the impedance of each first impedance tuning branch M12 is different. The first switch M11 may be turned on by selecting one of the plurality of first impedance tuning branches M12, or may be turned on by selecting the plurality of first impedance tuning branches M12. The first matching circuit M1 is configured to adjust a switching state of the first switch M11 to achieve impedance matching when the signal source 20 provides the first excitation signal and the second excitation signal. Alternatively, the number of the first switches M11 may be one or more.

For example, the first impedance tuning branch M12 comprises a ground tuning inductance, which is electrically connected to the first feeding point B1 for tuning the first radiator 11 to support a satellite communication frequency band, e.g. 1980-2200MHz, when the signal source 20 provides the first excitation signal, the first switch M11 is configured to be in a closed state. When the signal source 20 provides a second excitation signal, the first is configured to be in an off state, the electrical connection between the ground tuning inductance and the first feed point B1 is broken, for tuning the first radiator 11 to support a first MHB frequency band, such as the B1 frequency band, or the B3 frequency band, etc., and the second radiator 12 to support a second MHB frequency band, such as the B41 frequency band.

In addition, the present application provides that the first radiator 11 and the second radiator 12 generate dual-wave resonance to support multiple frequency bands. The first switch M11 in the first matching circuit M1 may be further switched to a first impedance tuning branch M12 with different impedance values, so as to achieve impedance matching of multiple frequency bands. The plurality of mobile communication bands supported by the first radiator 11 and the second radiator 12 are switchable or adjustable so as to cover the MHB full band.

Optionally, referring to fig. 21 and 22, the antenna assembly 100 further includes a third radiator 13, a fourth radiator 14, and a second matching circuit M2.

The third radiator 13 is arranged at the top edge 321. The material, shape, form, etc. of the third radiator 13 can be referred to as the material, shape, form, etc. of the first radiator 11.

Referring to fig. 21 and 22, the third radiator 13 includes a third free end C3, a third feeding point B3, and a third ground end A3. The third feeding point B3 is located between the third ground terminal A3 and the third free terminal C3. In other words, the antenna form of the third radiator 13 is IFA form.

The second matching circuit M2 is electrically connected to the third feeding point B3.

Referring to fig. 21 and 22, the fourth radiator 14 includes a fourth free end C4 and a fourth ground end A4.

Referring to fig. 21 and 22, the fourth free end C4 is disposed at the top edge 321. A second coupling gap N2 is formed between the fourth free end C4 and the third free end C3. The second coupling slit N2 may refer to the aforementioned first coupling slit N1.

The fourth ground terminal A4 is disposed on the first side 323 or the second side 324. In other words, the fourth radiator 14 is an L-shaped parasitic branch.

The signal source 20 is configured to supply the first excitation signal to the third radiator 13 via the second matching circuit M2. The signal source 20 excites the third radiator 13 and the fourth radiator 14 to form a second resonant mode supporting the satellite communication band. The third radiator 13 and the fourth radiator 14 form the satellite antenna with the top edge 321. The electrical length of the third radiator 13 is at or near 1/4 wavelength of the satellite communication frequency band, and the resonant current direction of the second resonant mode on the third radiator 13 and the fourth radiator 14 is the same. The second resonance mode is an E-E (electric field-electric field) radiation mode formed by the third radiator 13 and the fourth radiator 14.

Referring to fig. 11, the top edge 321 is taken as IFA node and the reference floor 500 is taken as an example to form a 3/2 symmetric dipole structure. The reference floor 500 is divided into a first floor area 510, a second floor area 520, and a third floor area 530 in the length direction. Wherein the first floor area 510 is 1/5 of the total length of the reference floor 500, the second floor area 520 is 2/5 of the total length of the reference floor 500, and the third floor area 530 is 2/5 of the total length of the reference floor 500.

Referring to fig. 12 and 21 in combination, the current distribution on the reference floor 500 of the IFA satellite antenna of the top edge 321 is as follows: the third feeding point B3 and the third grounding end A3 of the third radiator 13 are both the positions where the current strong points are located. The first floor region 510 corresponds to a region where the current is stronger than the third radiator 13 in the width direction of the reference floor 500, and is also a region where the current phase is relatively leading; the first floor area 510 is not located in a region corresponding to the third radiator 13 where the current is weaker, and is also a region where the current phase is relatively retarded. Since the radiation direction is directed from the leading phase to the lagging phase, the radiation direction of the first sub-radiation lobe Q1 (first side lobe) is directed to a side (e.g., left side in fig. 12) of the first floor area 510 which does not correspond to the third radiator 13.

The second floor region 520 corresponds to a region where the current is stronger and also a region where the current phase is relatively leading, of the third radiator 13 in the width direction of the reference floor 500; the second floor area 520 is not located in a region corresponding to the third radiator 13 where the current is weaker, and is also a region where the current phase is relatively retarded. Accordingly, the radiation direction of the second sub-radiation lobe Q2 (second side lobe) is directed to a side (e.g., left side in fig. 12) of the second floor area 520 that does not correspond to the third radiator 13. Since the overall intensity of the current of the second floor region 520 is smaller than that of the first floor region 510, the radiation intensity of the second side lobe is smaller than that of the first side lobe.

Since the current of the third radiator 13 and the reference floor 500 is mainly distributed along the length direction of the reference floor 500, the current on the reference floor 500 is mainly distributed from top to bottom along the longitudinal direction of the reference floor 500, wherein the current intensity near the top edge 321 in the longitudinal direction is greater than the current intensity near the bottom edge 322, and therefore, the radiation direction of the third sub-radiation lobe Q3 is downward radiation. Since the current intensity difference in the width direction of the reference floor 500 is smaller than the current intensity difference in the length direction of the reference floor 500, the third sub-radiation lobe Q3 is a main lobe.

Referring to fig. 11 and 21 in combination, the side of the reference floor 500 opposite to the first side 323 is a first reference side 503, and the side of the reference floor 500 opposite to the second side 324 is a second reference side 504.

Since the fourth ground terminal A4 is electrically connected to the first reference side 503. The fourth grounding end A4 forms a strong current point on the reference floor 500, so that the current on the reference floor 500 can be guided to the first reference edge 503, the lateral current of the first reference edge 503 is more concentrated, the current intensity of the first reference edge 503 is increased, the current phase of the first reference edge 503 is more advanced, the difference between the current phase of the first reference edge 503 and the current phase of the second reference edge 504 is further increased, the directivity coefficient of the first sub-radiation lobe Q1 is further increased, the radiation intensity of the first sub-radiation lobe Q1 is further increased, and the duty ratio of the upper hemisphere is further improved.

Referring to fig. 23 and 24, fig. 23 is a 3D radiation pattern on the reference floor 500 of the fourth grounding terminal A4 electrically connected to the first reference edge 503 according to the embodiment of the present application. Fig. 24 is a plan view of the 3D radiation pattern of fig. 23 when unfolded.

As can be seen from the current distribution diagram and the radiation pattern on the reference floor 500, the radiation basic structure in this embodiment is still a basic structure of a three-half wavelength dipole, the intensity of the first sub-radiation lobe Q1 is further increased, the intensity of the second sub-radiation lobe Q2 is further increased, and the upper hemispherical duty ratio is further improved.

The length of the fourth radiator 14 is not particularly limited in this application. Alternatively, the length of the fourth radiator 14 may be close to the length of the third radiator 13. Still alternatively, the length of the fourth radiator 14 may be slightly smaller than the length of the third radiator 13.

Optionally, referring to fig. 25, the fourth grounding end A4 is disposed at the hand holding area of the first side 323 or the second side 324. A fourth electric field E4 is formed between the fourth radiator 14 and the reference floor 500. The fourth electric field E4 is directed in a direction in which the fourth radiator 14 is directed to the reference floor 500, i.e. horizontally to the left in the drawing. The fourth ground terminal A4 of the fourth radiator 14 forms a fifth electric field E5 when contacting the hand. The fifth electric field E5 is directed inward (in the thickness direction of the electronic device 1000) perpendicular to the paper surface. The direction of the fifth electric field E5 is perpendicular to the direction of the fourth electric field E4. The fourth electric field E4 and the fifth electric field E5 form two perpendicular circular polarization components. The fifth electric field E5 and the fourth electric field E4 combine to form a sixth electric field E6 that faces the side of the top edge 321. The direction of the sixth electric field E6 is such that the bottom edge 322 points in the direction of the top edge 321. The sixth electric field E6 is configured to enable a radiation lobe facing the bottom edge 322 to face a side where the top edge 321 is located, fuse to form a radiation lobe facing the side where the top edge 321 is located, and the radiation lobe faces the side where the top edge 321 is located and has a larger beam range coverage, so that a left-hand circularly polarized main lobe is biased towards the top edge 321 toward a rear cover in a hand-held human head scene, and has a beam broadening effect on the side biased towards the top edge 321 is located after the hand-held human head scene, thereby improving an upper hemisphere duty ratio of a satellite communication frequency band.

Referring to fig. 26, fig. 26 is a 3D radiation pattern of the third radiator 13 and the fourth radiator 14 in a satellite communication scene of a person in head and hands according to the embodiment of the present application. It can be seen that the apparent pattern rises, and the human hand reflects the original downward pattern to the upward direction, such as the main lobe Q4 facing upward in fig. 26, so that the upward beam is widened, i.e., the human hand has a left-hand circular polarization enhancement effect.

Referring to fig. 27, fig. 27 is a 2D radiation pattern of the third radiator 13 and the fourth radiator 14 in a satellite communication scene of a person in head and hands according to the embodiment of the present application. It can be seen that the pattern beam changes significantly, pointing mainly upwards, with a beam spread in the range 60 ° -300 °, indicating that the human body enhances the beam upwards.

Optionally, referring to fig. 28, the third radiator 13 further includes a fifth free end C5. The third ground terminal A3 is located between the fifth free terminal C5 and the third free terminal C3. The third feeding point B3 is located at the third free end C3 and the third ground end A3. The third ground terminal A3 is located near the center position of the third radiator 13. In other words, the antenna of the third radiator 13 is in the form of a T-shaped antenna.

In this embodiment, referring to fig. 28, the third radiator 13 is a T-shaped antenna. The fourth radiator 14 forms a T + L type antenna with the third radiator 13. Optionally, the electrical length of the fourth radiator 14 is smaller than the electrical length of the third ground terminal A3 to the third free terminal C3. The electrical length between the fifth free end C5 and the third ground end A3 is slightly greater than the electrical lengths of the third ground end A3 to the third free end C3. Further, the electrical length between the fifth free end C5 and said third free end C3 is close to 1/2 wavelength of the satellite communication band. The above electrical length design makes the current flow direction on the fourth radiator 14 the same as the current flow direction on the third radiator 13, for example, the current flow on the third radiator 13 is distributed from the fifth free end C5 to the third free end C3, and the current flow on the fourth radiator 14 is distributed from the fourth free end C4 to the fourth ground end A4. Wherein, the third grounding terminal A3 and the fourth grounding terminal A4 are both in strong current positions. Accordingly, the areas of the reference floor 500 close to the third and fourth ground terminals A3 and A4 are all areas of high current. The areas of the reference floor 500 corresponding to the third and fourth radiators 13 and 14 are also high current areas.

On the one hand, since the current between the fifth free end C5 on the third radiator 13 and the third ground end A3 and the current between the third ground end A3 and the third free end C3 are the same-direction current. At this time, the current mode of the third radiator 13 is similar to that of the dipole antenna, and the current mode is 1/2 wavelength mode. The pattern of the third radiator 13 may be referred to as a dipole antenna pattern, in particular a loop pattern around the branches. The radiation direction of the third radiator 13 is the direction in which the third radiator 13 faces away from the reference floor 500, due to the influence (reflection) of the reference floor 500. In the electronic device 1000, the third radiator 13 radiates upward toward the top edge 321, so that the satellite communication band has a higher upper hemispherical duty cycle.

In the second aspect, since the fourth radiator 14 is disposed near the first side 323 or partially disposed at the first side 323. The third radiator 13 forms an ifa+l antenna between the third ground terminal A3 and the third free terminal C3, and the fourth radiator 14. And the current on the third radiator 13 and the current on the fourth radiator 14 are in the same direction, and the fourth grounding end A4 is the current strong point position. Therefore, the fourth radiator 14 further increases the current intensity of the first side 323 of the first floor area 510 and the second floor area 520, and improves the directivity coefficients of the first sub-radiation lobe Q1 and the second sub-radiation lobe Q2, so as to further enhance the intensities of the first sub-radiation lobe Q1 and the second sub-radiation lobe Q2, and further increase the upper hemisphere duty ratio of the satellite communication frequency band.

The functions of the two aspects are combined, and the function of improving the upper hemisphere duty ratio of the satellite communication frequency band of the two aspects can enable the antenna unit of the T+L antenna provided by the application to have the upper hemisphere duty ratio of the satellite communication frequency band.

Optionally, the signal source 20 is configured to provide the first excitation signal to the third radiator 13 when the electronic device 1000 is in a bluetooth headset satellite call or a speaker satellite call is turned on.

Optionally, referring to fig. 21, the switch switching circuit 40 is further electrically connected to the second matching circuit M2.

Because the satellite antenna at the top edge 321 is disposed at the top edge 321, and is close to the head in a head-to-hand communication scenario, which has a problem of frequency offset caused by a head medium or has a super SAR risk, the switch switching circuit 40 may be configured to turn on the signal source 20 and the first matching circuit M1 in a head-to-hand satellite communication scenario of the electronic device 1000, so as to perform satellite communication through a side satellite antenna; when the electronic device 1000 is in a bluetooth headset satellite call or a speaker satellite call is started, in addition, the satellite antenna at the top edge 321 is far away from the head, so that the frequency offset or the like caused by the head medium can not be generated or the super SAR risk is generated, so that the switch switching circuit 40 can be configured to conduct the signal source 20 and the second matching circuit M2 under the condition that the electronic device 1000 is in a head-to-hand satellite call, so as to perform satellite communication through the satellite antenna at the top edge 321.

The signal source 20 is also arranged to provide a second excitation signal in the MHB frequency band. When the signal source 20 is configured to provide the second excitation signal to the third radiator 13, the signal source 20 excites the third radiator 13 to form a fifth resonance mode supporting a third MHB frequency band and excites the fourth radiator 14 to form a sixth resonance mode supporting a fourth MHB frequency band.

Optionally, the third MHB frequency band includes, but is not limited to, a B1 frequency band, and the fourth MHB frequency band includes, but is not limited to, a B41 frequency band.

In this embodiment, the signal source 20 is capable of providing not only the first excitation signal in the satellite communication band to the third radiator 13, but also the signal source 20 is capable of providing the second excitation signal in the mobile communication band to the third radiator 13. The signal source 20 is configured to provide the first excitation signal and the second excitation signal in a time-sharing manner. Specifically, after the electronic device 1000 receives the condition of triggering the satellite connection, the signal source 20 provides a first excitation signal of the satellite communication frequency band for the third radiator 13, and after the electronic device 1000 closes the satellite connection, or when the satellite connection is closed and the mobile communication connection is triggered, the signal source 20 provides a second excitation signal of the mobile communication frequency band for the third radiator 13, where the size of the mobile communication frequency band is about 1.5 GHz to 2.5GHz, and further, the mobile communication frequency band is the MHB frequency band, so that the third radiator 13 is multiplexed into an antenna supporting the satellite communication frequency band and the MHB frequency band in a time-sharing manner.

Optionally, referring to fig. 29, the signal source 20 includes a mobile communication chip 22 and a satellite communication chip 21. The switch switching circuit 40 is used for conducting the mobile communication chip 22 and the second matching circuit M2 to provide the second excitation signal for the third radiator 13. The switch switching circuit 40 is used for conducting the satellite communication chip 21 and the second matching circuit M2 to provide the first excitation signal for the third radiator 13.

Referring to fig. 29, the second matching circuit M2 includes a second switch M21 and at least one second impedance tuning branch M22 electrically connected to the second switch M21. The number of second impedance tuning branches M22 is one or more. The second impedance tuning branch M22 includes, but is not limited to, an inductance, or a capacitance. When the number of the second impedance tuning branches M22 is plural, the impedance of at least two second impedance tuning branches M22 is different, or the impedance of each second impedance tuning branch M22 is different. The second switch M21 may select one of the plurality of second impedance tuning branches M22 to be turned on, or may select the plurality of second impedance tuning branches M22 to be turned on. The second matching circuit M2 is configured to adjust a switching state of the second switch M21 to achieve impedance matching when the signal source 20 provides the first excitation signal and the second excitation signal. Alternatively, the number of the second switches M21 may be one or a plurality.

For example, the second impedance tuning branch M22 comprises a ground tuning inductance, which is electrically connected to the third feeding point B3 for tuning the third radiator 13 to support a satellite communication band, e.g. 1980-2200MHz, when the signal source 20 provides the first excitation signal, the second switch M21 is configured to be in a closed state. When the signal source 20 provides the second excitation signal, the first is configured to be in an off state, the electrical connection between the ground tuning inductance and the third feeding point B3 is broken, for tuning the third radiator 13 to support a third MHB frequency band, such as a B1 frequency band, or a B3 frequency band, etc., and the fourth radiator 14 to support a fourth MHB frequency band, such as a B41 frequency band.

In addition, the third radiator 13 and the fourth radiator 14 generate dual-wave resonance to support multiple frequency bands. The second switch M21 in the second matching circuit M2 may be further switched to a second impedance tuning branch M22 with different impedance values, so as to implement impedance matching of multiple frequency bands. The multiple mobile communication bands supported by the third radiator 13 and the fourth radiator 14 are switchable or adjustable, so as to cover the MHB full band.

According to the electronic device 1000 provided by the application, the first radiator 11 is designed to be disposed on the first side edge 323, and the first free end C1 of the first radiator 11 is located between the first grounding end A1 and the top edge 321. One end of the first matching circuit M1 is electrically connected to the first feeding point B1. The return point 30 is located at the first ground terminal A1. Alternatively, one return point 30 is located at the first ground terminal A1, and the other return point 30 is located at the first matching circuit M1. The distance between at least one of the return points 30 and the center line L of the reference floor 500 is less than or equal to 1/8 wavelength of the satellite communication band. The signal source 20 is configured to electrically connect the first feeding point B1 via the first matching circuit M1, where the signal source 20 excites the first radiator 11 to form a first resonant mode supporting a satellite communication band, and excites the reference floor 500 to form at least a first current J1 and a second current J2, the first current J1 flowing from the return point 30 to the top side 321 and the second current J2 flowing from the return point 30 to the bottom side 322, the first current J1 forming a first radiation lobe F1 towards the top side 321, and the second current J2 forming a second radiation lobe F2 towards the bottom side 322. The electronic device 1000 has better communication quality in the satellite communication frequency band. The second radiation lobe F2 is inverted to be biased to the side of the top edge 321 when the first grounding end A1 contacts the hand, the inverted second radiation lobe F2 merges with the first radiation lobe F1 to form a third radiation lobe F3 facing the side of the top edge 321, and the third radiation lobe F3 faces the side of the top edge 321 and has a larger beam coverage. The antenna assembly provided by the embodiment of the application has a beam broadening effect on the side where the top edge 321 is located after being held by a hand, so that the upper hemispherical duty ratio of the satellite communication frequency band is improved.

According to the design of the long-side pattern overturning satellite antenna, the original main lobe is designed to be the long-side satellite antenna with the upward direction and the downward direction through combining the beam occupation width of the polarization pattern and the human body enhancement characteristic of pattern overturning by the human hand, the main lobe of the free left-hand circular polarization pattern is downward, the left-hand circular polarization main lobe of the human head is in the upward direction, and the risk of super SAR is avoided.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present application, and that variations, modifications, alternatives and alterations of the above embodiments may be made by those skilled in the art within the scope of the present application, which are also to be regarded as being within the scope of the protection of the present application.

Claims

1. The utility model provides an electronic equipment, its characterized in that includes frame, reference floor and antenna assembly, the frame is including the topside, first side, base and the second side that connect gradually, the reference floor is located in the frame, the reference floor has the central line that extends along width direction, antenna assembly includes:

the first radiator is arranged on the first side edge and comprises a first grounding end, a first feed point and a first free end, the first free end is positioned between the first grounding end and the top edge, and the first grounding end is electrically connected with the reference floor;

A first matching circuit electrically connected to the first feed point;

At least one return point, wherein the return point is positioned at the first grounding end and/or the first matching circuit; at least one of the return points is less than or equal to 1/8 wavelength of the satellite communication band in a direction parallel to the first side edge from a center line of the reference floor;

the signal source is configured to electrically connect the first feed point via the first matching circuit, the first excitation signal is configured to excite the first radiator to form a first resonant mode supporting the satellite communication band, and to excite the reference floor to form at least a first current flowing from the return point to the top edge and a second current flowing from the return point to the bottom edge, the first current forming a first radiation lobe toward the top edge, the second current forming a second radiation lobe toward the bottom edge.

2. The electronic device of claim 1, wherein the first current is in a 1/2 wavelength mode of the satellite communications band and the second current is in a 1/2 wavelength mode of the satellite communications band.

3. The electronic device of claim 2, wherein the first ground terminal is located on a side of a centerline of the reference floor that faces away from the top edge, and the first feed point is located between the centerline of the reference floor and the top edge.

4. The electronic device of claim 1, wherein the reference floor comprises a first floor and a second floor interconnected as one, the first floor for providing a circuit board of the electronic device or a circuit board comprising the electronic device, the second floor for providing a battery of the electronic device, at least a portion of the first current being formed at the first floor, and at least a portion of the second current being formed at the second floor.

5. The electronic device of claim 1, wherein the second radiation lobe is inverted toward a side on which the top edge is located when the electronic device is in a hand-held talk scenario.

6. The electronic device of claim 5, wherein the first ground terminal is located at a hand-holding area of the first side, the hand-holding area being an area of the first side that contacts a hand when the electronic device is in the hand-held talk scenario.

7. The electronic device of claim 6, wherein a first electric field is formed between the first radiator and the reference floor, a first ground terminal of the first radiator forms a second electric field when in contact with a hand, the second electric field is perpendicular to the first electric field, the first electric field and the second electric field combine to form a third electric field toward a side of the top edge, and the second radiation flap is toward the side of the top edge under the action of the third electric field.

8. The electronic device of claim 1, wherein the antenna assembly further comprises a second radiator comprising a second free end and a second ground end, the second free end and the first free end being in a first coupling gap therebetween.

9. The electronic device of claim 8, wherein the signal source is further configured to provide a second excitation signal of the MHB frequency band, the second excitation signal configured to excite the first radiator to form a third resonant mode supporting the first MHB frequency band; and exciting the second radiator to form a fourth resonant mode supporting a second MHB frequency band.

10. The electronic device of claim 1, wherein the signal source is configured such that a maximum SAR value when the first radiator provides the first excitation signal is less than 1.5W/KG.

11. The electronic device of claim 1, wherein the signal source is configured to provide the first excitation signal to the first radiator when the electronic device is in a human head satellite conversation scenario.

12. The electronic device of any of claims 1-11, wherein the antenna assembly further comprises a third radiator, a fourth radiator, and a second matching circuit, the third radiator is disposed on the top side, the third radiator comprises a third free end, a third feeding point, and a third ground end, the second matching circuit is electrically connected to the third feeding point, the fourth radiator comprises a fourth free end and a fourth ground end, the fourth free end is disposed on the top side, a second coupling gap is formed between the fourth free end and the third free end, the fourth ground end is disposed on the first side or the second side, and the first excitation signal is further used to excite the third radiator and the fourth radiator to form a second resonant mode supporting the satellite communication band.

13. The electronic device of claim 12, wherein the fourth ground terminal is disposed in the hand holding area of the first side or the second side, a fourth electric field is formed between the fourth radiator and the reference floor, the fourth ground terminal of the fourth radiator forms a fifth electric field when contacting with the hand, the fifth electric field is perpendicular to the fourth electric field, the fifth electric field and the fourth electric field combine to form a sixth electric field facing the side of the top edge, and the sixth electric field is used to make a radiation lobe of the satellite communication band face the side of the top edge.

14. The electronic device of claim 12, wherein the third radiator further comprises a fifth free end, the third ground end is located between the fifth free end and the third free end, and the third feed point is located between the third free end and the third ground end.

15. The electronic device of claim 12, wherein the signal source is configured to provide the first excitation signal to the third radiator when the electronic device is in a bluetooth headset satellite call or a speaker satellite call is turned on.

16. The electronic device of claim 12, wherein the signal source is further configured to provide a second excitation signal of an MHB frequency band, the second excitation signal further configured to excite the third radiator to form a fifth resonant mode supporting a third MHB frequency band; and exciting the fourth radiator to form a sixth resonant mode supporting a fourth MHB frequency band.

17. The electronic device of any of claims 1-11, 13-16, wherein the first ground terminal is the first feed point;

or the first feeding point is located between the first grounding end and the first free end, and the distance between the first feeding point and the first grounding end is smaller than the distance between the first feeding point and the first free end;

Or, the first feeding point B1 is located between the first ground end and the first free end, and a distance between the first feeding point and the first ground end is greater than or equal to a distance between the first feeding point and the first free end; the first matching circuit comprises a capacitive element, and the first matching circuit is electrically connected to the first feed point through the capacitive element.

18. An electronic device, comprising:

a reference floor;

the frame is arranged around the reference floor and comprises a top edge, a first side edge, a bottom edge and a second side edge which are sequentially connected, a first accommodating space and a second accommodating space are formed by surrounding the frame and the reference floor together, the first accommodating space is adjacent to the top edge, and the second accommodating space is used for accommodating a battery;

the circuit board is arranged in the first accommodating space, a signal source is arranged on the circuit board, a connection point electrically connected with the signal source is arranged in a region far away from the top edge and close to the first side edge, and the signal source is used for providing a first excitation signal of a satellite communication frequency band;

the first matching circuit is electrically connected between the signal source and the connecting point; and

The first radiator is arranged on the first side edge, comprises a first grounding end, a first feed point and a first free end, wherein the first feed point is opposite to the connecting point in a direction parallel to the top edge and is electrically connected with the signal source through the connecting point, the first grounding end is positioned on one side, far away from the top edge, of the first feed point, and the first free end is positioned between the first feed point and the top edge;

the signal source is configured to feed the first excitation signal to the first radiator via the first matching circuit to excite the first radiator and the reference floor to form a first resonant mode supporting the satellite communication frequency band, the first resonant mode forming at least a first current and a second current on the reference floor, the first current flowing from a position on the reference floor corresponding to the connection point to the top side, the second current flowing from a position on the reference floor corresponding to the connection point to the bottom side, the first current forming a first radiation lobe towards the top side, the second current forming a second radiation lobe towards the bottom side.

19. The electronic device of claim 18, wherein the reference floor includes a centerline parallel to the top edge, an orthographic projection of the first ground terminal on the reference floor being located on a side of the centerline of the reference floor facing away from the top edge, the connection point being located between the centerline of the reference floor and the top edge; the working mode of the first current is a 1/2 wavelength mode of the satellite communication frequency band, and the working mode of the second current is a 1/2 wavelength mode of the satellite communication frequency band.

20. The electronic device of claim 18, wherein the first ground terminal is located at a hand-holding area of the first side edge, the hand-holding area being an area of the first side edge that contacts a hand when the electronic device is in a hand-held talk scenario, the second radiation lobe being inverted toward a side of the top edge when the electronic device is in the hand-held talk scenario.