CN112736461B

CN112736461B - Antenna device and electronic equipment

Info

Publication number: CN112736461B
Application number: CN202011580160.XA
Authority: CN
Inventors: 王泽东
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2023-06-09
Anticipated expiration: 2040-12-28
Also published as: CN112736461A

Abstract

The embodiment of the application provides an antenna device and electronic equipment, wherein the antenna device comprises a first radiator, a second radiator, a third radiator, a fourth radiator, a first feed source and a second feed source, a first coupling gap is formed between one end of the second radiator and the first radiator, and a grounding end is arranged at the other end of the second radiator; one end of the third radiator is connected with the grounding end, and the other end extends towards the direction away from the second radiator; a second coupling gap is formed between one end of the fourth radiator and the third radiator, and the other end extends towards the direction away from the third radiator; the first feed source is coupled with the first radiator, and the second radiator generates first resonance; the second feed is coupled to the third radiator, at least a portion of the third radiator and the fourth radiator together producing a second resonance. Based on this, the first resonance and the second resonance can maintain a good isolation and a good radiation performance.

Description

Antenna device and electronic equipment

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an antenna device and an electronic device.

Background

With the development of communication technology, electronic devices such as smartphones are capable of realizing more and more functions, and communication modes of the electronic devices are also more diversified. It will be appreciated that each communication mode of the electronic device requires a corresponding antenna to support.

However, with the development of electronic technology, electronic devices are becoming smaller and thinner, the internal space of the electronic devices is also becoming smaller, and the coupling between multiple antennas is becoming more serious. Therefore, how to improve the isolation between antennas is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides an antenna device and electronic equipment, wherein a plurality of radiators in the antenna device have good isolation.

In a first aspect, an embodiment of the present application provides an antenna apparatus, including:

a first radiator;

a first coupling gap is formed between one end of the second radiator and the first radiator, and the other end of the second radiator is provided with a grounding end;

a first feed coupled to the first radiator, the first feed for providing a first excitation signal to cause the second radiator to generate a first resonance;

one end of the third radiator is connected with the grounding end, and the other end of the third radiator extends towards a direction away from the second radiator;

a second coupling gap is formed between one end of the fourth radiator and the third radiator, and the other end of the fourth radiator extends towards a direction away from the third radiator; and

And a second feed coupled to the third radiator, the second feed for providing a second excitation signal coupled to the fourth radiator through the second coupling gap to excite at least a portion of the third radiator and the fourth radiator together to produce a second resonance.

In a second aspect, embodiments of the present application further provide an electronic device including the antenna apparatus as described above.

According to the antenna device and the electronic equipment, the first coupling gap is formed between the second radiator and the first radiator of the antenna device, and the grounding end is arranged at one end, far away from the first coupling gap, of the second radiator. One end of the third radiator is connected with the first grounding end, and the other end of the third radiator extends towards a direction away from the second radiator. A second coupling gap is formed between one end of the fourth radiator and the third radiator, and the other end of the fourth radiator extends towards a direction away from the third radiator. The first feed is coupled to the first radiator, and the first feed provides a first excitation signal to cause the second radiator to generate a first resonance. The second feed is coupled to the third radiator, and a second excitation signal provided by the second feed can be coupled to the fourth radiator through a second coupling gap to excite at least part of the third radiator and the fourth radiator to jointly generate second resonance. Therefore, in the antenna device according to the embodiment of the application, the second radiator and the fourth radiator are used as main radiating parts of the first resonance and the second resonance respectively, and even if the second radiator is adjacent to the third radiator, the first resonance and the second resonance can be separated by the distance of the length of the third radiator, and the first resonance and the second resonance can keep good isolation and good radiation performance.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a first structure of an antenna device according to an embodiment of the present application.

Fig. 2 is a first current schematic diagram of the antenna device shown in fig. 1.

Fig. 3 is a second current schematic diagram of the antenna device shown in fig. 1.

Fig. 4 is a schematic diagram of a second structure of an antenna device according to an embodiment of the present application.

Fig. 5 is a first current schematic diagram of the antenna device shown in fig. 4.

Fig. 6 is a second current schematic diagram of the antenna device shown in fig. 4.

FIG. 7 is a graph showing reflection coefficient curves of the first resonance and the second resonance in the N41 band.

Fig. 8 is a schematic diagram of a system efficiency curve of the first resonance in the N41 frequency band.

Fig. 9 is a schematic diagram of a system efficiency curve of the second resonance in the N41 frequency band.

FIG. 10 is a graph showing reflection coefficient curves of the fourth resonance and the fifth resonance in the N78 band.

FIG. 11 is a diagram illustrating a system efficiency curve of the fifth resonance in the N78 band.

Fig. 12 is a schematic diagram of a system efficiency curve of the fourth resonance in the N78 band.

Fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to fig. 1 to 13 in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present application based on the embodiments herein.

Reference herein 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 present application. The appearances of such phrases 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 of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The embodiment of the application provides an antenna device and electronic equipment, wherein the antenna device is used for realizing a wireless communication function of the electronic equipment, for example, the antenna device can transmit wireless fidelity (Wireless Fidelity is called Wi-Fi for short), global positioning system (Global Positioning System is called GPS for short) signals, fourth Generation mobile communication technology (3 th-Generation is called for short) 3G, third Generation mobile communication technology (4 th-Generation is called for short) 4G, fifth Generation mobile communication technology (5 th-Generation is called for short) 5G, near field communication (Near field communication is called for short) signals and the like.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a first structure of an antenna device according to an embodiment of the present application, and fig. 2 is a schematic diagram of a first current of the antenna device shown in fig. 1. The antenna device 100 includes a first radiator 110, a second radiator 120, a third radiator 130, a fourth radiator 140, a first feed 150, and a second feed 160.

The first radiator 110 and the second radiator 120 are disposed at intervals, a first coupling gap 101 is formed between one end of the second radiator 120 and the first radiator 110, the other end of the second radiator 120 is provided with a ground connection, the free end of the first radiator 110 is close to the first coupling gap 101, the free end of the second radiator 120 is also close to the first coupling gap 101, so that the free end of the first radiator 110 and the free end of the second radiator 120 are disposed opposite to each other at the first coupling gap 101, the first radiator 110 can be grounded at one end far from the first coupling gap 101, and the second radiator 120 can be grounded at one end far from the first coupling gap 101, so that the first radiator 110 and the second radiator 120 can form a common aperture antenna pair with a port-to-port.

It is understood that the first radiator 110 may include a first ground terminal 111 and a first feed terminal 112 disposed at a spaced apart position. The first ground 111 may be an end of the first radiator 110 away from the first coupling gap 101, and the first feeding end 112 may be closer to the first coupling gap 101 than the first ground 111. The first radiator 110 may be electrically connected to the ground plane 200 of the antenna device 100 or the electronic device through the first ground terminal 111 to achieve the grounding of the first radiator 110.

The second radiator 120 may include a second ground 121, and the second ground 121 may be an end of the second radiator 120 remote from the first coupling gap 101. The second radiator 120 may be electrically connected to the ground plane 200 of the antenna device 100 or the electronic device through the second ground terminal 121 to achieve the grounding of the second radiator 120.

Wherein one end of the third radiator 130 may be connected to the second radiator 120 at the second ground 121, and the other end of the third radiator 130 may extend in a direction away from the second radiator 120. The third radiator 130 and the second radiator 120 may be formed as a whole (for example, the third radiator 130 and the second radiator 120 may be formed in an inverted "L" shape in fig. 1), the second ground 121 may be located between the third radiator 130 and the second radiator 120, and both the third radiator 130 and the second radiator 120 may be grounded through the second ground 121.

It is understood that the third radiator 130 may be located at a side of the second radiator 120 facing away from the first radiator 110, that is, the second radiator 120 may be located between the first radiator 110 and the third radiator 130, so that the first radiator 110, the first coupling gap 101, the second radiator 120, and the third radiator 130 may be sequentially arranged.

The fourth radiator 140 is spaced from the third radiator 130, a second coupling gap 102 may be formed between one end of the fourth radiator 140 and the third radiator 130, and the other end of the fourth radiator 140 may extend in a direction away from the third radiator 130 and be grounded. The free end of the third radiator 130 is close to the second coupling gap 102, and the free end of the fourth radiator 140 is also close to the second coupling gap 102, so that the free end of the third radiator 130 and the free end of the fourth radiator 140 are disposed opposite to each other at the second coupling gap 102, and the fourth radiator 140 may be grounded at one end far from the second coupling gap 102, so that the third radiator 130 and the fourth radiator 140 may also form a pair of mouth-to-mouth common-caliber antennas.

It is understood that the fourth radiator 140 may be located at a side of the third radiator 130 facing away from the second radiator 120, i.e., the third radiator 130 may be located between the second radiator 120 and the fourth radiator 140. At this time, the first radiator 110, the first coupling gap 101, the second radiator 120, the third radiator 130, the second coupling gap 102, and the fourth radiator 140 may be sequentially arranged.

It is understood that the third radiator 130 may be provided with a second feeding end 131, and the second feeding end 131 may be disposed between the second ground end 121 and the second coupling gap 102, and the third radiator 130 may be electrically connected to the second feed 160 through the second feeding end 131. The third radiator 130 may share the second ground 121 with the second radiator 120, and the second ground 121 may increase the isolation of the third radiator 130 from the second radiator 120.

It is understood that the third grounding terminal 141 may be disposed on the fourth radiator 140, and the third grounding terminal 141 may be disposed at an end of the fourth radiator 140 away from the second coupling gap 102, and the fourth radiator 140 may be electrically connected to the ground plane 200 of the antenna apparatus 100 or the electronic device through the third grounding terminal 141 to achieve the grounding of the fourth radiator 140.

Wherein the first feed 150 may be coupled to the first radiator 110, e.g., the first feed 150 may be electrically connected to the first radiator 110 through the first feed end 112 of the first radiator 110. As shown in fig. 2, the first feed 150 may provide a first excitation signal I1 and may feed the first excitation signal I1 into the first radiator 110, and the second radiator 120 may generate a first resonance under the influence of the first excitation signal I1.

It is understood that the first excitation signal I1 may be grounded from the second ground 121 of the second radiator 120.

Wherein second feed 160 may be coupled to third radiator 130, e.g., second feed 160 may be electrically connected to third radiator 130 through second feed end 131 of third radiator 130. As shown in fig. 2, second feed 160 may provide a second excitation signal I2 and may feed second excitation signal I2 into third radiator 130, second excitation signal I2 being transmitted in third radiator 130 and may be coupled into fourth radiator 140 through second coupling gap 102 to excite at least a portion of third radiator 130 and fourth radiator 140 together to produce a second resonance.

It is understood that the second excitation signal I2 may be grounded from the third ground 141 of the fourth radiator 140.

It will be appreciated that the distance between the second feeding end 131 and the second coupling gap 102 may be smaller than the distance between the second feeding end 131 and the second ground end 121, so that a small portion of the third radiator 130 and the entire fourth radiator 140 generate a second resonance, which is mainly generated by the fourth radiator 140.

In the antenna device 100 of the embodiment of the present application, a first coupling gap 101 is formed between the second radiator 120 and the first radiator 110, and the second radiator 120 is provided with a second grounding end 121 at an end far from the first coupling gap 101. The third radiator 130 is connected to the second ground 121, and the second radiator 120 is located between the first radiator 110 and the third radiator 130. A second coupling gap 102 is formed between the fourth radiator 140 and the third radiator 130, and the third radiator 130 is located between the second radiator 120 and the fourth radiator 140. The first feed 150 is coupled to the first radiator 110, and the first feed 150 may provide a first excitation signal I1 to cause the second radiator 120 to generate a first resonance. Second feed 160 is coupled to third radiator 130, and a second excitation signal I2 provided by second feed 160 may be coupled to fourth radiator 140 through second coupling gap 102 to excite at least a portion of third radiator 130 and fourth radiator 140 to collectively produce a second resonance. Therefore, in the antenna device 100 of the embodiment of the present application, the structure among the plurality of radiators is compact, the space occupied by the radiator is small, and miniaturization of the antenna device 100 can be achieved; meanwhile, the second radiator 120 and the fourth radiator 140 are respectively utilized to become main radiation parts of the first resonance and the second resonance, even if the second radiator 120 is adjacent to the third radiator 130, the first resonance and the second resonance can be separated by the distance of the length of the third radiator 130, and the first resonance and the second resonance can keep good isolation and good radiation performance.

The first resonance and the second resonance according to the embodiments of the present application have good isolation, so that the resonance frequency range of the first resonance may be the same as the resonance frequency range of the second resonance, so that even if the isolation of the antenna device 100 for transmitting two wireless signals in the same frequency band may meet the communication requirement, the first resonance and the second resonance may be multiple-in-multiple-out (MIMO) transmission.

Of course, the resonance frequency range of the first resonance may be different from the resonance frequency range of the second resonance, so that mutual coupling between the first resonance and the second resonance with different resonance frequencies is weak, and isolation between the first resonance and the second resonance is better.

Wherein the first resonance may be directly excited by the first excitation signal I1. For example, the first excitation signal I1 provided by the first feed 150 may be coupled to the second radiator 120 through the first coupling gap 101, such that portions of the first radiator 110 and the second radiator 120 may collectively generate a first resonance. Of course, the first resonance may also be generated indirectly under the influence of the first excitation signal I1. For example, please refer to fig. 2 in combination with fig. 3, fig. 3 is a second current schematic diagram of the antenna device shown in fig. 1. The antenna device 100 may further include a first matching circuit M1 and a second matching circuit M2. It will be appreciated that the matching circuit may also be referred to as a matching network, tuning circuit, tuning network, etc.

The first matching circuit M1 may be coupled between the first feed 150 and the first radiator 110, for example, the first matching circuit M1 is connected in series between the first feed 150 and the first feed 112. The first matching circuit M1 may perform impedance matching on the first excitation signal I1 provided by the first feed source 150.

One end of the second matching circuit M2 is coupled to the second radiator 120, and the other end of the second matching circuit M2 is grounded. The second matching circuit M2 may perform impedance matching of the excitation signal flowing through the second radiator 120.

It is understood that the first matching circuit M1 and the second matching circuit M2 may include circuits formed by any series connection or any parallel connection of a capacitor, an inductor, and a resistor, which will not be described in detail herein.

It can be appreciated that the antenna apparatus 100 according to the embodiment of the present application may have a first Non-independent Networking (NSA) mode, as shown in fig. 3, in which, in the first Non-independent networking mode, the first feed source 150 may provide a first excitation signal I1, where the first excitation signal I1 is fed into the first radiator 110 through the first feed end 112 after the tuning action of the first matching circuit M1, and the first radiator 110 may generate a third resonance under the tuning action of the first matching circuit M1. Meanwhile, the second radiator 120 may generate the aforementioned first resonance under the tuning action of the second matching circuit M2.

It is understood that the frequency range of the first resonance may be different from the frequency range of the third resonance, for example, the frequency range of the third resonance may be the B3 band (1.71 GHz to 1.88 GHz) and the frequency range of the first resonance may be the N41 band (2.5 GHz to 2.69 GHz).

It will be appreciated that the third resonance generated by the first radiator 110 may be grounded through the first grounding end 111 of the first radiator 110, the first resonance generated by the second radiator 120 may be grounded through the second grounding end 121, the second resonance generated by the third radiator 130 and the fourth radiator 140 together may be grounded through the third grounding end 141 of the fourth radiator 140, so that the return points of the first resonance, the second resonance and the third resonance are far, and the isolation between the three resonances is better.

In the antenna device 100 of the embodiment of the present application, when the antenna device 100 is in NSA mode and the first feed source 150 provides the first excitation signal I1, the first radiator 110 may generate the third resonance under the tuning action of the first matching circuit M1; the second radiator 120 can generate first resonance under the tuning action of the second matching circuit M2, so that the first feed source 150 feeds in an excitation signal, the first radiator 110 and the second radiator 120 can generate two resonances, and the antenna device 100 can be miniaturized; meanwhile, the isolation between the first resonance/the third resonance and the second resonance is also good, so that the radiation performance of the antenna device 100 can be improved.

Referring to fig. 4 and fig. 5, fig. 4 is a schematic diagram of a second structure of the antenna device according to the embodiment of the present application, and fig. 5 is a schematic diagram of a first current of the antenna device shown in fig. 4. The antenna arrangement 100 may also include a third feed 170.

The third feed 170 may be coupled with the fourth radiator 140. For example, a third feeding end 142 may be disposed on the fourth radiator 140, and the third feeding end 142 may be located between the second coupling gap 102 and the third ground 141, and the third feed 170 may be electrically connected to the fourth radiator 140 through the third feeding end 142.

As shown in fig. 4, the third feed 170 may provide a third excitation signal I3, the third excitation signal I3 being transmitted on the fourth radiator 140 and may be coupled to the third radiator 130 through the second coupling gap 102 to excite at least a portion of the fourth radiator 140 and at least a portion of the third radiator 130 together to generate a fourth resonance.

It will be appreciated that the second resonance is generated by the third radiator 130 and the fourth radiator 140 together, and the fourth resonance is generated by the third radiator 130 and the fourth radiator 140 together, so that the third radiator 130 and the fourth radiator 140 can be multiplexed, and the antenna apparatus 100 can be miniaturized.

It is understood that the fourth radiator 140 and the third radiator 130 may generate the second resonance or the fourth resonance. The fourth radiator 140 and the third radiator 130 may also generate the second resonance and the fourth resonance at the same time.

It will be appreciated that the second resonance may have a different range of frequencies than the fourth resonance, and that the second resonance may have the same range of frequencies as the fourth resonance.

In the antenna device 100 of the embodiment of the present application, since the second grounding end 121 is grounded between the second radiator 120 and the third radiator 130, the second grounding end 121 can increase the isolation between the fourth resonance and the resonance generated by the second radiator 120, so as to ensure the radiation performance of the antenna device 100.

It can be appreciated that the first resonance and the fourth resonance have good isolation, and thus, the resonance frequency range of the first resonance may be the same as the resonance frequency range of the fourth resonance, so that even if the isolation of the antenna device 100 for transmitting two wireless signals in the same frequency band may meet the communication requirement, the first resonance and the fourth resonance may form MIMO transmission. Of course, the resonance frequency range of the first resonance may also be different from the resonance frequency range of the fourth resonance to increase the isolation of the two.

In order to further increase the isolation between the first resonance and the fourth resonance, referring to fig. 4 and 5 again, the antenna device 100 of the embodiment of the present application may further include a first filter circuit LC1, and the first filter circuit LC1 may also be referred to as a filter network.

The first filter circuit LC1 may include a first end a and a second end b, the first end a may be coupled between the second feed 160 and the third radiator 130, for example, between the second feed 160 and the second feed end 131. The second terminal b may be grounded, and the first filter circuit LC1 may be short-circuited to the third excitation signal I3 to form a fourth resonance.

It is understood that the first filter circuit LC1 is shorted to the third excitation signal I3, which may mean that the resistance of the first filter circuit LC1 is infinitely small in the frequency band of the third excitation signal I3, so as to ground the third excitation signal I3. As shown in fig. 5, when the third feed 170 feeds the third excitation signal I3 to the fourth radiator 140, the third excitation signal I3 may be coupled to the third radiator 130 through the second coupling gap 102 and then may return to ground through the first filter circuit LC 1.

It will be appreciated that the first filter circuit LC1 may comprise a circuit consisting of any series or any parallel connection of a capacitance, an inductance, a resistance. And will not be described in detail herein.

In the antenna module provided by the embodiment of the application, the first filter circuit LC1 is provided, on one hand, the first filter circuit LC1 can prevent the third excitation signal I3 from being grounded from the second grounding end 121 so as to avoid overlapping with the current return point of I3, so that adjacent first resonance and fourth resonance also have good isolation, and the first resonance and the fourth resonance can have good radiation performance; on the other hand, the first end a of the first filter circuit LC1 is coupled between the second feed source 160 and the third radiator 130, and the first filter circuit LC1 may also prevent the third excitation signal I3 from flowing into the second feed source 160 to affect the performance of the second feed source 160, so as to ensure the normal formation of the second resonance.

Referring to fig. 4 in combination with fig. 6, fig. 6 is a second current schematic diagram of the antenna device shown in fig. 4 when the antenna device 100 is provided with the third feed 170. The antenna device 100 may further include a second filter circuit LC2. The second filter circuit LC2 may also be a filter network.

One end of the second filter circuit LC2 may be electrically connected to the third feed end 142 of the fourth radiator 140, the other end of the second filter circuit LC2 may be electrically connected to the third feed 170, and the second filter circuit LC2 is coupled between the third feed 170 and the fourth radiator 140. The second filter circuit LC2 may be open-circuited to the second excitation signal I2 fed by the second feed 160 to form the aforementioned second resonance.

It will be appreciated that the second filter circuit LC2 being open to the second excitation signal I2 may refer to the infinite resistance of the second filter circuit LC2 at the resonance of the second excitation signal I2 to block the second excitation signal I2 from flowing into the third feed 170.

It will be appreciated that the second filter circuit LC2 may comprise a circuit consisting of any series or any parallel connection of a capacitance, an inductance, a resistance. And will not be described in detail herein.

In the antenna module provided by the embodiment of the application, the second filter circuit LC2 is arranged, and the second filter circuit LC2 opens the second excitation signal I2, on one hand, the second filter circuit LC2 can prevent the second excitation signal I2 from flowing into the third feed source 170 to affect the performance of the third feed source 170, so as to ensure the normal operation of fourth resonance; on the other hand, after the second filter circuit LC2 blocks the second excitation signal I2, the second excitation signal I2 may be coupled to the fourth radiator 140 through the second coupling gap 102 and then grounded from the third ground 141 at the most distal end, so that isolation between the second resonance and the first resonance may be ensured.

When at least a portion of the fourth radiator 140 and at least a portion of the third radiator 130 together generate the fourth resonance, the antenna device 100 of the embodiment of the present application may also have the second non-independent networking mode. Referring to fig. 5 again, in the second non-independent networking mode, when the first feed source 150 provides the first excitation signal I1, the first excitation signal I1 is fed into the first radiator 110 through the first feed end 112 after the tuning action of the first matching circuit M1, and the first radiator 110 can generate the third resonance under the tuning action of the first matching circuit M1. Meanwhile, the second radiator 120 may generate fifth resonance under the tuning action of the second matching circuit M2.

It is understood that the frequency range of the fifth resonance may be different from the frequency range of the third resonance, for example, when the frequency range of the third resonance is the B3 band (1.71 GHz to 1.88 GHz), the frequency range of the fifth resonance may be the N78 band (3.4 GHz to 3.6 GHz).

It can be appreciated that after the first feed source 150 provides the first excitation signal I1, the second radiator 120 may generate the first resonance under the tuning action of the second matching circuit M2, and the second radiator 120 may also generate the fifth resonance under the tuning action of the second matching circuit M2, so that the antenna apparatus 100 of the embodiment of the present application may adapt to NSA modes of different frequency bands.

It will be appreciated that the second matching circuit M2 may comprise at least two tuning branches, such as a first tuning branch and a second tuning branch, and that the second matching circuit M2 may switch on the first tuning branch when the second radiator 120 needs to generate the first resonance; when the second radiator 120 needs to generate the fifth resonance, the second matching circuit M2 may conduct the second tuning branch.

It is understood that the frequency range of the fifth resonance may be the same as the frequency range of the fourth resonance, for example, the fifth resonance and the fourth resonance may each be in the N78 frequency band (3.4 GHz to 3.6 GHz).

In the antenna state of the embodiment of the present application, the third resonance generated by the first radiator 110 may be grounded through the first grounding end 111 of the first radiator 110, the fifth resonance generated by the second radiator 120 may be grounded through the second grounding end 121, and the fourth resonance jointly generated by the fourth radiator 140 and the third radiator 130 may be grounded through the first filter circuit LC1, so that the return points of the third resonance, the fourth resonance and the fifth resonance are far, and the isolation between the three resonances is better. At this time, even if the fourth resonance and the fifth resonance transmit wireless signals of the same frequency band, mutual interference therebetween is small.

In order to further enhance the performance of the antenna device 100, referring to fig. 4 again, the antenna device 100 may further include a third matching circuit M3 and a fourth matching circuit M4.

The third matching circuit M3 may be coupled between the third feed 170 and the fourth radiator 140, e.g., the third matching circuit M3 is connected in series between the third feed 170 and the third feed 142. The third matching circuit M3 may perform impedance matching on the third excitation signal I3 provided by the third feed 170.

Fourth matching circuit M4 may be coupled between second feed 160 and third radiator 130. For example, fourth matching circuit M4 is connected in series between second feed 160 and second feed 131. Fourth matching circuit M4 may impedance match second excitation signal I2 provided by second feed 160.

It is understood that the third matching circuit M3 and the fourth matching circuit M4 may include circuits formed by any series connection or any parallel connection of a capacitor, an inductor, and a resistor, which will not be described in detail herein.

It is understood that at least one, two, three, four of the first matching circuit M1, the second matching circuit M2, the third matching circuit M3, and the fourth matching circuit M4 may be different in structure. The embodiment of the present application does not limit the structure of the matching circuit. The antenna device 100 of the embodiment of the present application may better form the first resonance, the second resonance, the third resonance, and the fourth resonance under the effect of the above-mentioned matching circuit.

Based on the above-mentioned architecture of the antenna device 100, the antenna device 100 of the embodiment of the present application may be applied to a non-independent networking state of different frequency bands of 5G. When in NSA state, the antenna apparatus 100 is required to operate in both long term evolution (Long Term Evolution, LTE for short) state and in 5G standard (New Radio Access Technology in 3GPP, NR for short) state based on completely new air interface design for OFDM. At this time, the first radiator 110 and the second radiator 120 may operate in a combination of B3 band (1.71 GHz to 1.88 GHz) and N41 band (2.5 GHz to 2.69 GHz) or a combination of B3 band and N78 band (3.4 GHz to 3.6 GHz) at the same time. Meanwhile, based on the 5G communication standard, at least 4 antennas operating in the N41 band and the N78 band are required. Therefore, the third radiator 130 and the fourth radiator 140 in the embodiment of the present application may operate in the N41 frequency band and the N78 frequency band to meet the communication requirement.

The following description will take an example in which the antenna device 100 is in a combination of the B3 band and the N41 band:

as shown in fig. 3, when the first feed source 150 feeds the first excitation signal I1 to the first feed end 112, the first radiator 110 may generate a third resonance under the tuning action of the first matching circuit M1, and a frequency band range of the third resonance may be a B3 frequency band. The second radiator 120 may generate a first resonance under the tuning action of the second matching circuit M2, and the frequency range of the first resonance may be the N41 frequency range. At this time, the first radiator 110 and the second radiator 120 may operate in B3 and N41 frequency bands. When the second feed 160 feeds the second excitation signal I2 to the third radiator 130, the third radiator 130 and the fourth radiator 140 may be coupled through the second coupling gap 102 and form a second resonance under the action of the second excitation signal I2, and the second excitation signal I2 may return to ground from the third ground 141 of the fourth radiator 140. The frequency range of the second resonance may also be the N41 frequency band. At this time, the antenna device 100 may form one resonance of the B3 band (third resonance) and two resonances of the N41 band (first resonance and second resonance).

Referring to fig. 7 to fig. 9, fig. 7 is a graph illustrating reflection coefficient curves of the first resonance and the second resonance in the N41 frequency band; FIG. 8 is a diagram illustrating a system efficiency curve of the first resonance in the N41 band; fig. 9 is a schematic diagram of a system efficiency curve of the second resonance in the N41 frequency band. As shown in fig. 7, a curve S1 is a reflection coefficient curve of the first resonance in the N41 frequency band, a curve S2 is a reflection coefficient curve of the second resonance in the N41 frequency band, and a curve S3 is an isolation curve of the first resonance and the second resonance in the N41 frequency band. Since the first resonance can be grounded through the second grounding end 121 and the second resonance can be grounded through the third grounding end 141, the distance between the first resonance and the second resonance is far, as can be seen from fig. 7, the worst isolation between the two N41 frequency band resonances is about-12.6 dB, and further the isolation between the two N41 frequency band resonances in the embodiment of the present application is better.

As shown in fig. 8, a curve S4 is a radiation efficiency curve of the first resonance in the N41 frequency band, and a curve S5 is a system efficiency curve of the first resonance in the N41 frequency band. As can be seen from fig. 8, the system efficiency of the first resonance in the N41 frequency band is about-5.9 dB to-2.7 dB, and the radiation characteristic of the first resonance is better. As shown in fig. 9, a curve S6 is a radiation efficiency curve of the second resonance in the N41 frequency band, and a curve S7 is a system efficiency curve of the second resonance in the N41 frequency band. As can be seen from fig. 9, the system efficiency of the second resonance in the N41 frequency band is about-5.8 dB to-3.5 dB, and the radiation characteristic of the second resonance is better.

The following description will take an example in which the antenna device 100 is in a combination of the B3 band and the N78 band:

as shown in fig. 5, when the first feed source 150 feeds the first excitation signal I1 to the first feed end 112, the first radiator 110 may generate a third resonance under the tuning action of the first matching circuit M1, and a frequency band range of the third resonance may be a B3 frequency band. The second radiator 120 may generate a fifth resonance under the tuning action of the second matching circuit M2, and the frequency range of the fifth resonance may be the N78 frequency range. At this time, the first radiator 110 and the second radiator 120 may operate in the B3 and N78 frequency bands. When the third feed 170 feeds the third excitation signal I3 to the fourth radiator 140, the fourth radiator 140 and the third radiator 130 may be coupled through the second coupling gap 102 and form a fourth resonance under the action of the third excitation signal I3, and the third excitation signal I3 may return to ground from the first filter circuit LC1 connected to the third radiator 130. The frequency range of the fourth resonance may also be the N78 frequency range. At this time, the antenna device 100 may form a resonance in the B3 band (third resonance) and two resonances in the N78 band (fifth resonance and fourth resonance)

Referring to fig. 10 to 12, fig. 10 is a graph showing reflection coefficient curves of the fourth resonance and the fifth resonance in the N78 frequency band, fig. 11 is a graph showing system efficiency curves of the fifth resonance in the N78 frequency band, and fig. 12 is a graph showing system efficiency curves of the fourth resonance in the N78 frequency band. As shown in fig. 10, a curve S8 is a reflection coefficient curve of the fifth resonance in the N78 frequency band, a curve S9 is a reflection coefficient curve of the fourth resonance in the N78 frequency band, and a curve S10 is an isolation curve of the fifth resonance and the fourth resonance in the N78 frequency band. Since the fifth resonance can be grounded through the second grounding end 121, the fourth resonance can be grounded through the first filtering circuit LC1, and the distance between the current return points of the fifth resonance and the fourth resonance is relatively long, as can be seen from fig. 10, the isolation between the resonances of the two N78 frequency bands is about-11.5 dB, and further the isolation between the resonances of the two N78 frequency bands in the embodiment of the present application is relatively good.

As shown in fig. 11, a curve S11 is a radiation efficiency curve of the fifth resonance in the N78 frequency band, and a curve S12 is a system efficiency curve of the fifth resonance in the N78 frequency band. As can be seen from fig. 11, the system efficiency of the fifth resonance in the N78 frequency band is about-3.5 dB to-3.4 dB, and the radiation characteristic of the resonance is better. As shown in fig. 12, a curve S13 is a radiation efficiency curve of the fourth resonance in the N78 frequency band, and a curve S14 is a system efficiency curve of the fourth resonance in the N78 frequency band. As can be seen from fig. 12, the system efficiency of the fourth resonance in the N78 frequency band is about-3.9 dB to-2.8 dB, and the radiation characteristic of the fourth resonance is better.

In the antenna device 100 of the embodiment of the present application, under the condition that adjacent radiators operate in the same frequency band, different radiators are used for radiation, so that good isolation can be generated, and normal operation of the b3+n41 states of the first radiator 110 and the second radiator 120 and the N41 states of the fourth radiator 140 and the third radiator 130 in the NSA state can be ensured. In addition, the first filter circuit LC1 is equivalently shorted in the N78 frequency band, and becomes a current ground, so that the b3+n78 states of the first radiator 110 and the second radiator 120 and the N78 states of the fourth radiator 140 and the third radiator 130 can be ensured to work normally at the same time.

It will be appreciated that the above are only a few application embodiments of the antenna device 100 of the embodiments of the present application. The first resonance of the antenna device 100 according to the embodiment of the present application may be arbitrarily combined according to the requirement, and is not limited to the above-described combination. For example, a combination of a third resonance and a second resonance, a combination of a third resonance and a fourth resonance, a combination of a third resonance, a first resonance, a second resonance, a fourth resonance, and so on may be included. This is not limiting in the embodiments of the present application.

It is to be understood that the frequency ranges of the first resonance, the second resonance, the third resonance, the fourth resonance, and the fifth resonance are not limited to the above examples, and may be any frequency range known at present, for example, a 3G frequency range, a 4G frequency range, a 5G frequency range, a wireless fidelity frequency range, a global positioning system frequency range, a bluetooth frequency range, and the like, which are not limited in the embodiments of the present application.

Based on the structure of the antenna device 100, the embodiment of the application also provides an electronic device. The electronic device may be a smart phone, a tablet computer, or a game device, an augmented reality (Augmented Reality, abbreviated as AR) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or the like. Referring to fig. 13, fig. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 10 may include a display 300, a center 400, a circuit board 500, a battery 600, and a rear case 700, in addition to the antenna apparatus 100 and the ground plane 200.

The display screen 300 is disposed on the middle frame 400 to form a display surface of the electronic device 10, and is used for displaying information such as images and texts. The display screen 300 may include a liquid crystal display (Liquid Crystal Display, LCD) or an Organic Light-Emitting Diode (OLED) display, or the like.

It will be appreciated that the display 300 may be a full screen, in which case the entire area of the display 300 is a display area and does not include a non-display area, or the non-display area on the display 300 occupies only a small area to the user, so that the display 300 has a large screen duty cycle. Alternatively, the display 300 may be a non-full screen, where the display 300 includes a display area and a non-display area adjacent to the display area. The display area is used for displaying information, and the non-display area is not used for displaying information.

It will be appreciated that a cover plate may be further provided on the display 300 to protect the display 300 from scratches or water damage. The cover plate may be a transparent glass cover plate, so that a user can observe the content displayed on the display screen 300 through the cover plate. It will be appreciated that the cover plate may be a sapphire glass cover plate.

The middle frame 400 may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The center 400 is used to provide support for the electronics or functional components in the electronic device 10 to mount the electronics, functional components of the electronic device 10 together. For example, the middle frame 400 may be provided with grooves, protrusions, through holes, etc. to facilitate mounting of the electronic devices or functional components of the electronic apparatus 10. It is understood that the material of the middle frame 400 may include metal or plastic.

It is understood that when the middle frame 400 includes a metal material, the first, second, third and

fourth radiators

110, 120, 130 and 140 may be a plurality of metal branches on the middle frame 400. For example, the first coupling gap 101 and the second coupling gap 102 may be provided on the middle frame 400 to form first to fourth radiators. At this time, the middle frame 400 may be multiplexed as a radiator, and space occupied by the radiator may be saved.

The circuit board 500 is disposed on the middle frame 400 to be fixed, and the circuit board 500 is sealed inside the electronic device 10 by the rear case 700. The circuit board 500 may be a motherboard of the electronic device 10. The circuit board 500 may have a processor integrated thereon, and may further have one or more of a headset interface, an acceleration sensor, a gyroscope, a motor, and other functional components integrated thereon. Meanwhile, the display screen 300 may be electrically connected to the circuit board 500 to control display of the display screen 300 by a processor on the circuit board 500.

It is understood that one or more of the first feed 150, the second feed 160, the third feed 170, the first filter circuit LC1, the second filter circuit LC2, the third matching circuit M3, the second matching circuit M2, the first matching circuit M1, and the fourth matching circuit M4 of the antenna device 100 may be disposed on the circuit board 500. Of course, the above components may be provided on a small board of the electronic device 10, which is not limited herein.

It is understood that one or more of the first, second, third and

fourth radiators

110, 120, 130, 140 may also be disposed on the circuit board 500, such as by etching, spraying, etc. on one side of the circuit board 500. Of course, the radiator may be disposed on a stand of the electronic device 10 so that the radiator is located inside the electronic device 10.

The battery 600 is disposed on the center 400, and the battery 600 is sealed inside the electronic device 10 by the rear case 700. Meanwhile, the battery 600 is electrically connected to the circuit board 500 to realize that the battery 600 supplies power to the electronic device. Wherein the circuit board 500 may be provided with a power management circuit. The power management circuitry is used to distribute the voltage provided by the battery 600 to the various electronic devices in the electronic device 10.

The rear case 700 is connected to the center 400. For example, the rear case 700 may be attached to the center 400 by an adhesive such as a double-sided tape to achieve connection with the center 400. The rear case 700 is used to seal the electronic devices and functional components of the electronic device 10 inside the electronic device together with the middle frame 400 and the display screen 300, so as to protect the electronic devices and functional components of the electronic device 10.

It should be understood that in the description of this application, terms such as "first," "second," and the like are used merely to distinguish between similar objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

The antenna device and the electronic device provided in the embodiments of the present application are described in detail above. The principles and embodiments of the present application are described herein with specific examples, the above examples being provided only to assist in understanding the methods of the present application and their core ideas; meanwhile, those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, and the present description should not be construed as limiting the present application in view of the above.

Claims

1. An antenna device, comprising:

a first radiator;

A second feed coupled to the third radiator, the second feed for providing a second excitation signal coupled to the fourth radiator through the second coupling gap to excite at least a portion of the third radiator and the fourth radiator together to produce a second resonance;

a third feed coupled to the fourth radiator, the third feed for providing a third excitation signal coupled to the third radiator through the second coupling gap to excite at least a portion of the fourth radiator and at least a portion of the third radiator together to produce a fourth resonance; and

And the first filter circuit comprises a first end and a second end, the first end is coupled between the second feed source and the third radiator, the second end is grounded, and the first filter circuit is used for shorting the third excitation signal so as to form the fourth resonance.

2. The antenna device according to claim 1, characterized in that the antenna device further comprises:

a first matching circuit coupled between the first feed and the first radiator; and

One end of the second matching circuit is coupled with the second radiator, and the other end of the second matching circuit is grounded; wherein,,

the antenna device is provided with a first non-independent networking mode, and in the first non-independent networking mode, the first radiator generates third resonance under the tuning action of the first matching circuit; at the same time, the second radiator generates the first resonance under the tuning action of the second matching circuit.

3. The antenna device according to claim 1, wherein the frequency ranges of the first resonance and the second resonance are the same.

4. The antenna device according to claim 1, further comprising:

And a second filter circuit coupled between the third feed and the fourth radiator, the second filter circuit being open-circuited to the second excitation signal to form the second resonance.

5. The antenna device according to claim 1, further comprising:

and the third matching circuit is coupled between the third feed source and the fourth radiator and is used for carrying out impedance matching on the third excitation signal.

6. The antenna device of claim 2, wherein the antenna device has a second non-independent networking mode in which the first radiator generates the third resonance under tuning action of the first matching circuit; simultaneously, the second radiator generates fifth resonance under the tuning action of the second matching circuit; wherein the fifth resonance and the fourth resonance have the same frequency range.

7. The antenna device according to any one of claims 1 to 6, further comprising:

and the fourth matching circuit is coupled between the second feed source and the third radiator and is used for carrying out impedance matching on the second excitation signal.

8. An electronic device comprising an antenna arrangement as claimed in any one of claims 1 to 7.