TW202002400A - Antenna structure and wireless communication device using the same - Google Patents

Abstract

An antenna structure includes a side frame, a first feeding portion, a second feeding portion, a first grounding portion, and a second grounding portion. The side frame defines a first gap, a second gap, and a first radiating portion. A portion of the side frame between the first gap and the second gap forms the first radiating portion. The first grounding portion and the second grounding portion are electrically connected to the first radiating portion. A portion of the side frame between the first feeding portion and the first grounding portion or the second grounding portion forms a branch. The first feeding portion is electrically connected to the first radiating portion and the branch to feed current signals to the first radiating portion and the branch. A wireless communication device having the antenna structure is also provided.

Description

Antenna structure and wireless communication device with the antenna structure

The invention relates to an antenna structure and a wireless communication device with the antenna structure.

With the advancement of wireless communication technology, electronic devices such as mobile phones and personal digital assistants continue to develop toward the trend of diversified functions, thinner and thinner, and faster and more efficient data transmission. However, the space that can accommodate the antenna is getting smaller and smaller, and with the continuous development of wireless communication technology, the bandwidth requirements of the antenna are increasing. Therefore, how to design an antenna with a wider bandwidth in a limited space is an important issue facing antenna design.

In view of this, it is necessary to provide an antenna structure and a wireless communication device having the antenna structure.

An embodiment of the present invention provides an antenna structure applied to a wireless communication device. The antenna structure includes a housing, a first feeding portion, a first grounding portion, and a second grounding portion. The housing includes at least a backplane and a frame. The frame is provided on the periphery of the back plate, a slot is provided on the back plate, a first break point, a second break point and a first radiating portion are provided on the frame, the slot is opened in the An edge of the back plate is arranged parallel to the frame, one of the first break point and the second break point is opened at one end of the slot; the first break point and the second break point All the points penetrate and cut off the frame, the frame between the first breakpoint and the second breakpoint constitutes the first radiating portion, and both the first grounding portion and the second grounding portion The first radiating portion is connected, the frame between the first feed portion and one of the first ground portion and the second ground portion forms a branch, and the first feed portion is electrically connected to the The first radiating portion and the branch are used to feed current signals to the first radiating portion and the branch.

An embodiment of the present invention provides a wireless communication device including the antenna structure.

The above antenna structure and the wireless communication device with the antenna structure can cover the LTE-A low, medium and high frequency band, GPS frequency band, WIFI 2.4GHz and WIFI 5GHz frequency band, and the frequency range is wider.

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

It should be noted that when an element is called "electrically connected" to another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "electrically connected" to another element, it may be a contact connection, for example, a wire connection, or a contactless connection, for example, a contactless coupling.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the description of the present invention herein is for the purpose of describing specific embodiments, and is not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

Example 1

Please refer to FIG. 1 and FIG. 2, the first preferred embodiment of the present invention provides an antenna structure 100, which can be applied to wireless communication devices 200 such as mobile phones, personal digital assistants, etc. for transmitting and receiving radio waves for transmission and exchange Wireless signal.

Please refer to FIG. 3 together. The antenna structure 100 at least includes a housing 11, a first feeding portion 12, a second feeding portion 13, a first grounding portion 15, a second grounding portion 16, a first matching circuit 17 and a switching circuit 18.

The casing 11 may be a casing of the wireless communication device 200. The casing 11 includes at least a frame 112 and a back plate 113. Both the frame 112 and the back plate 113 are made of metal material. In this embodiment, the frame 112 has a substantially ring structure. The frame 112 is disposed on the periphery of the back plate 113 and is integrally formed with the back plate 113. An opening (not shown) is provided on the side of the frame 112 away from the back plate 113 for accommodating the display unit 201 of the wireless communication device 200. It can be understood that the display unit 201 has a display plane, and the display plane is exposed at the opening.

The back plate 113 and the display plane of the display unit 201 are substantially parallel to each other. It can be understood that, in this embodiment, the back plate 113 and the frame 112 together form an accommodating space 114. The accommodating space 114 is used for accommodating electronic components or circuit modules such as the substrate and the processing unit of the wireless communication device 200 therein. It can be understood that, in this embodiment, the display unit 201 may be a full-screen structure. In other embodiments, the display unit 201 may have a non-full-screen structure, that is to say, at least one notch (not shown) may be formed on the display unit 201.

The frame 112 at least includes an end portion 115, a first side portion 116 and a second side portion 117. In this embodiment, the end portion 115 may be the top end of the wireless communication device 200, that is, the antenna structure 100 constitutes an upper antenna of the wireless communication device 200. The first side portion 116 is disposed opposite to the second side portion 117, and the two are respectively disposed at both ends of the end portion 115, preferably vertically.

In this embodiment, the frame 112 is provided with a first breakpoint 118 and a second breakpoint 119. A slot 120 is defined in the back plate 113. In this embodiment, the first break point 118 is opened at a position of the first side portion 116 close to the end portion 115. The second breakpoint 119 is opened at a position of the end portion 115 close to the second side portion 117. The slot 120 is opened at the edge of the back plate 113 and is disposed parallel to the frame 112. Specifically, the slot 120 is substantially an inverted U-shaped structure, which is opened inside the end portion 115 and extends toward the direction of the first side portion 116 and the second side portion 117 respectively, thereby making The end portion 115 is insulated from the back plate 113 at an interval.

Both the first breakpoint 118 and the second breakpoint 119 communicate with the slot 120 and extend to cut off the frame 112. In this embodiment, the slot 120, the first breakpoint 118, and the second breakpoint 119 together define a first radiating portion E1 and a second radiating portion E2 that are spaced apart from the frame 112. In this embodiment, the frame 112 between the first break point 118 and the second break point 119 constitutes the first radiating portion E1. The second break point 119 is away from the first radiation part E1 and the frame 112 on the side of the first break point 118 constitutes the second radiation part E2.

In this embodiment, the first radiating portion E1 and the back plate 113 are spaced apart and insulated by the slot 120 and the first break point 118. The side of the second radiating portion E2 away from the second break point 119 is connected to the frame 112, so that the second radiating portion E2, the frame 112 and the back plate 113 form an integrally formed body Border body.

In this embodiment, the widths of the first breakpoint 118 and the second breakpoint 119 are both D1. The width of the slot 120 is D2. In this embodiment, the width D1 of the first breakpoint 118 and the second breakpoint 119 are both 1-3 mm. The width D2 of the slot 120 is 0.5-1.5 mm. The first radiating portion E1 and the second radiating portion E2 are at least 1 mm away from the metal element in the accommodating space 114. The first radiation part E1 and the second radiation part E2 are at least 1 mm away from the metal element in the display unit 201.

It can be understood that in this embodiment, the first breakpoint 118, the second breakpoint 119, and the slot 120 are filled with insulating materials, such as plastic, rubber, glass, wood, ceramic, etc., but Not limited to this.

It can be understood that, in other embodiments, the shape of the slot 120 is not limited to the above-mentioned U-shape, and it can also be adjusted according to specific requirements, for example, it can also be straight, diagonal, zigzag, etc. .

Obviously, the shape and position of the slot 120 and the positions of the first breakpoint 118 and the second breakpoint 119 on the frame 112 can be adjusted according to specific needs, and only the slot 120, The first breakpoint 118 and the second breakpoint 119 may be divided into the first radiating portion E1 and the second radiating portion E2 that are spaced apart from the frame 112.

In this embodiment, the antenna structure 100 further includes a first ground point 210, a second ground point 211, a first feed point 212, and a second feed point 213. The first ground point 210 and the second ground point 211 are spaced apart to provide ground for the antenna structure 100. The first feeding point 212 is disposed between the first grounding point 210 and the second grounding point 211 to feed current to the antenna structure 100. The second feed point 213 is disposed on a side of the second ground point 211 away from the first ground point 210 to feed current to the antenna structure 100.

It can be understood that the wireless communication device 200 further includes at least one electronic component. In this embodiment, the wireless communication device 200 includes at least four electronic components, namely a first electronic component 215, a second electronic component 216, a third electronic component 217, and a fourth electronic component 218. The first electronic component 215, the second electronic component 216, the third electronic component 217, and the fourth electronic component 218 are all disposed in the accommodating space 114, and are located in the first feed Between point 212 and the second feed point 213.

In this embodiment, the first electronic component 215 is an audio interface module, which is disposed between the second ground point 211 and the second feed point 213 and is close to the second ground point 211 settings. The second electronic component 216 is a front camera module, which is located between the first feed point 212 and the second ground point 211. The third electronic component 217 is a receiver module, which is located between the second ground point 211 and the second electronic component 216 and is disposed close to the second electronic component 216. The fourth electronic component 218 is an earphone module, which is disposed between the first feeding point 212 and the second electronic component 216.

It can be understood that the second breakpoint 119 corresponds to the first electronic component 215 so that the first electronic component 215 is partially exposed from the second breakpoint 119. In this way, the user can insert an audio component (such as an earphone) through the second breakpoint 119 to establish an electrical connection with the first electronic component 215. The first electronic component 215, the second electronic component 216, the third electronic component 217, and the fourth electronic component 218 are all insulated from the first radiating portion E1 by the slot 120 .

The first feeding portion 12 is disposed inside the housing 11 and is located between the fourth electronic component 218 and the first ground portion 15. One end of the first feeding part 12 is electrically connected to the first radiating part E1, and the other end is electrically connected to the first feeding point 212 through the first matching circuit 17 to be the first radiating part E1 Feed current signal.

It can be understood that, in this embodiment, the first matching circuit 17 may be an L-type matching circuit, a T-type matching circuit, a π-type matching circuit, or other capacitors, inductors, and a combination of capacitors and inductors to adjust the first The impedance of a radiating part E1 is matched.

The second feeding portion 13 is provided inside the housing 11. The second feeding portion 13 is disposed between the first electronic component 215 and the second side portion 117. One end of the second feeding portion 13 is electrically connected to the second radiating portion E2, and the other end is electrically connected to the second feeding point 213 through a second matching circuit 131, which is then the second radiating portion E2 Feed current signal.

It can be understood that, in this embodiment, the second matching circuit 131 may be an L-type matching circuit, a T-type matching circuit, a π-type matching circuit, or other capacitors, inductors, and a combination of capacitors and inductors to adjust the first The impedance of the two radiating parts E2 is matched.

In this embodiment, the first grounding portion 15 is provided inside the housing 11 and is located between the first break point 118 and the first feeding portion 12. One end of the first grounding portion 15 is electrically connected to the first grounding point 210 through the switching circuit 18, and the other end is electrically connected to the end of the first radiating portion E1 close to the first break point 118. In order to provide ground for the first radiating part E1. The second grounding portion 16 is disposed inside the housing 11 and is located between the first electronic component 215 and the third electronic component 217. One end of the second grounding portion 16 is electrically connected to the first radiating portion E1, and the other end is electrically connected to the second grounding point 211 through the third matching circuit 141, which is then the first radiating portion E1 Provide grounding.

In this embodiment, the frame 112 between the first feeding portion 12 and the second ground portion 16 constitutes a branch A1. It can be understood that, in this embodiment, the first feeding portion 12, the branch A1, and the second ground portion 16 constitute an inverted F-shaped antenna.

It can be understood that please refer to FIG. 4 together, when the current is fed from the first feeding part 12, the current will be fed into the first radiating part E1 through the first feeding part 12, thereby exciting the first A modal to generate radiated signals in the first frequency band (see path P1). In addition, when the current is fed from the first feeding part 12, the current will also flow through the branch A1, the second ground part 16 and the third matching circuit 141 in sequence, and The second ground point 211 is grounded to excite the second mode to generate a radiation signal in the second frequency band (see path P2).

When the current is fed from the second feeding part 13, the current will be fed into the second radiating part E2 through the second feeding part 13, and grounded through the frame 112, thereby exciting the third Modal to generate radiated signals in the third frequency band (see path P3).

In this embodiment, the first mode is a long-term evolution technology upgrade (LTE-Advanced, LTE-A) low-frequency mode. The second mode includes LTE-A intermediate frequency mode and LTE-A high frequency mode. The third mode may include one or more modes of a global positioning system (Global Positioning System, GPS) mode, a WIFI 2.4 GHz mode, and a WIFI 5 GHz mode. The frequency of the second frequency band is higher than the frequency of the first frequency band. The frequency of the third frequency band is higher than the frequency of the first frequency band. The frequency of the first frequency band is 700-960 MHz. The frequencies of the second frequency band are 1710-2170 MHz and 2300-2690 MHz. The frequency of the third frequency band may include one or more frequency bands among 1575 MHz, 2400-2484 MHz, and 5150-5850 MHz.

In this embodiment, the first feeding portion 12 and the first radiating portion E1 constitute a first antenna. The first feed portion 12, the branch A1, and the second ground portion 16 constitute a second antenna. The second feeding portion 13 and the second radiating portion E2 constitute a third antenna. The first antenna is a Planar Inverted F-shaped Antenna (PIFA). The second antenna is a PIFA antenna or a diversity antenna. The third antenna is a GPS antenna, a WIFI 2.4 antenna and a WIFI 5GHz antenna.

Please refer to FIG. 5 together. In this embodiment, the switching circuit 18 includes a switching unit 181 and at least one switching element 183. The switching unit 181 may be a single-pole single-throw switch, a single-pole double-throw switch, a single-pole three-throw switch, a single-pole four-throw switch, a single-pole six-throw switch, a single-pole eight-throw switch, and the like. The switching unit 181 is electrically connected to the first radiation part E1. The switching element 183 may be an inductor, a capacitor, or a combination of an inductor and a capacitor. The switching elements 183 are connected in parallel with each other, and one end of the switching element 183 is electrically connected to the switching unit 181, and the other end is electrically connected to the first ground point 210, that is, ground.

In this way, by controlling the switching of the switching unit 181, the first radiating portion E1 can be switched to a different switching element 183. Since each switching element 183 has a different impedance, the frequency band of the first radiating portion E1 can be adjusted by the switching unit 181. For example, in this embodiment, the switching circuit 18 may include four switching elements 183 having different impedances. By switching the first radiating portion E1 to four different switching elements 183, the low frequency of the first mode in the antenna structure 100 can be respectively covered to the LTE-A Band8 frequency band (880-960MHz), LTE- A Band5 frequency band (824-894MHz), LTE-A Band13 frequency band (746-787MHz) and LTE-A Band17 frequency band (704-746MHz).

6 is a graph of S-parameters (scattering parameters) of the antenna structure 100 when the antenna structure 100 works in the LTE-A low-frequency mode when the switching unit 181 switches to different switching elements 183 in the switching circuit 18 shown in FIG. 5. The curve S701 is the S11 value when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 works in the LTE-A Band8 frequency band (880-960MHz). The curve S702 is the S11 value when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 works in the LTE-A Band5 frequency band (824-894 MHz). Curve S703 is the S11 value when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 works in the LTE-A Band13 frequency band (746-787MHz). The curve S704 is the S11 value when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 works in the LTE-A Band17 frequency band (704-746MHz).

FIG. 7 is a radiation efficiency curve diagram of the antenna structure 100 when the switching structure 181 of the switching circuit 18 shown in FIG. 5 switches to different switching elements 183 when the antenna structure 100 operates in the LTE-A low-frequency mode. The curve S801 is a graph of the radiation efficiency when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 works in the LTE-A Band8 frequency band (880-960MHz). The curve S802 is a graph of the radiation efficiency when the first antenna is switched to one of the switching elements 183, so that the antenna structure 100 works in the LTE-A Band5 frequency band (824-894 MHz). Curve S803 is a graph of the radiation efficiency when the first antenna is switched to one of the switching elements 183 so that the antenna structure 100 works in the LTE-A Band13 frequency band (746-787 MHz). Curve S804 is a graph of the radiation efficiency when the first antenna is switched to one of the switching elements 183 so that the antenna structure 100 works in the LTE-A Band17 frequency band (704-746 MHz).

FIG. 8 shows S-parameters (scattering) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode when the switching unit 181 switches to different switching elements 183 in the switching circuit 18 shown in FIG. 5 Parameter) curve. Curve S901 is the S11 value when the first antenna is switched to the LTE-A Band8 frequency band (880-960 MHz) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode. Curve S902 is the S11 value when the first antenna is switched to the LTE-A Band5 frequency band (824-894 MHz) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode. Curve S903 is the S11 value when the first antenna is switched to the LTE-A Band13 frequency band (746-787 MHz) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode. Curve S904 is the S11 value when the first antenna is switched to the LTE-A Band17 frequency band (704-746 MHz) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode.

9 is a radiation efficiency curve diagram of the antenna structure 100 when the antenna unit 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode when the switching unit 181 switches to different switching elements 183 in the switching circuit 18 shown in FIG. 5 . Curve S1001 is the radiation efficiency curve diagram when the first antenna is switched to the LTE-A Band8 frequency band (880-960MHz) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode . Curve S1002 is a radiation efficiency curve diagram of the antenna structure 100 when the first antenna is switched to the LTE-A Band5 frequency band (824-894 MHz) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode. Curve S1003 is a graph of radiation efficiency when the first antenna is switched to the LTE-A Band13 frequency band (746-787 MHz) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode. Curve S1004 is a radiation efficiency curve diagram of the antenna structure 100 when the first antenna is switched to the LTE-A Band17 frequency band (704-746 MHz) when the antenna structure 100 works in the LTE-A intermediate frequency mode and the LTE-A high frequency mode.

10 is a graph of S-parameters (scattering parameters) when the antenna structure 100 works in the GPS mode, the WIFI 2.4 GHz mode, and the WIFI 5 GHz mode.

FIG. 11 is a graph of radiation efficiency when the antenna structure 100 works in GPS mode, WIFI 2.4 GHz mode and WIFI 5 GHz mode.

FIG. 12 is a graph of S-parameters (scattering parameters) when the antenna structure 100 works in the WIFI 5 GHz mode.

FIG. 13 is a graph of radiation efficiency when the antenna structure 100 works in the WIFI 5 GHz mode.

Obviously, as can be seen from FIGS. 6 to 13, in the antenna structure 100, the first feeding portion 12, the first radiating portion E1, and the first grounding portion 15 are mainly used to excite the LTE-A low frequency mode And the low frequency of the antenna structure 100 can at least cover the LTE-A Band8 frequency band (880-960MHz), LTE-A Band17 frequency band (704-746MHz), LTE-A Band5 Frequency band (824-894MHz), LTE-A Band13 frequency band (746-787MHz) and LTE-A Band17 frequency band (704-746MHz). In the antenna structure 100, the first feeding portion 12, the branch A1, and the second ground portion 16 are mainly used to excite the LTE-A intermediate frequency mode and the LTE-A high frequency mode. The second feeding part 13 and the second radiating part E2 in the antenna structure 100 are mainly used to excite GPS mode, WIFI 2.4 GHz mode and WIFI 5 GHz mode.

Furthermore, when the antenna structure 100 works in the LTE-A Band8 band (880-960MHz), the LTE-A Band17 band (704-746MHz), the LTE-A Band5 band (824-894MHz), and the LTE-A Band13 band (746-787MHz) and LTE-A Band17 frequency band (704-746MHz), the LTE-A intermediate frequency band, LTE-A high frequency band, GPS frequency band, WIFI 2.4GHz band and WIFI 5GHz band of the antenna structure 100 are all Not affected. That is, when the switching circuit 18 switches, the switching circuit 18 is only used to change the LTE-A low frequency mode of the antenna structure 100 and does not affect its LTE-A intermediate frequency mode, LTE-A high frequency mode, GPS Mode, WIFI 2.4GHz mode and WIFI 5GHz mode.

Example 2

Please refer to FIG. 14, which is an antenna structure 100a provided by the second preferred embodiment of the present invention, which can be applied to wireless communication devices 200a such as mobile phones and personal digital assistants, for transmitting and receiving radio waves to transmit and exchange wireless Signal.

In this embodiment, the wireless communication device 200a includes at least four electronic components, namely a first electronic component 215, a second electronic component 216, a third electronic component 217, and a fourth electronic component 218.

The antenna structure 100a includes at least a back plate 113, a frame 112, a first feeding portion 12, a second feeding portion 13, a first grounding portion 15, a second grounding portion 16, a first matching circuit 17, a second matching circuit 131, The third matching circuit 141, the fourth matching circuit 151, and the switching circuit 18.

The antenna structure 100a further includes a first ground point 210, a second ground point 211, a first feed point 212, a second feed point 213, and a third feed point 214.

The frame 112 is provided with a first breakpoint 118, a second breakpoint 119 and a slot 120. In this embodiment, both the first breakpoint 118 and the second breakpoint 119 communicate with the slot 120.

In this embodiment, the slot 120, the first breakpoint 118, and the second breakpoint 119 together divide the spaced apart first radiating portion E1 and second radiating portion E2 from the frame 112.

The portion from the first feeding portion 12 to the second ground portion 16 constitutes a branch A1.

The second feeding portion 13 is disposed between the first electronic component 215 and the second side portion 117. One end of the second feeding portion 13 is electrically connected to the second radiating portion E2. The other end of the second feeding section 13 is connected to the second feeding point 213 through the second matching circuit 131. The other end of the second feeding section 13 is also connected to the third feeding point 214 through the fourth matching circuit 151. The second feeding point 213 and the third feeding point 214 may feed a current signal to the second radiating part E2, so that the second radiating part E2 excites the third mode to generate the third frequency band Radiation signal.

It can be understood that, in this embodiment, the difference between the antenna structure 100a and the antenna structure 100 is that the antenna structure 100a further includes a fourth matching circuit 151 and a third feeding point 214. In this embodiment, one end of the fourth matching circuit 151 is electrically connected to the second feeding portion 13 and the other end is electrically connected to the third feeding point 214.

In this embodiment, the current path of the antenna structure 100a is the same as the current path of the antenna structure 100, which will not be repeated here.

Example 3

Please refer to FIG. 15, which is an antenna structure 100b provided by a third preferred embodiment of the present invention, which can be applied to wireless communication devices 200b such as mobile phones and personal digital assistants, for transmitting and receiving radio waves to transmit and exchange wireless Signal.

In this embodiment, the wireless communication device 200b includes at least four electronic components, namely a first electronic component 215, a second electronic component 216, a third electronic component 217, and a fourth electronic component 218.

The antenna structure 100b includes at least a back plate 113, a frame 112, a first feeding portion 12, a second feeding portion 13, a first grounding portion 15, a second grounding portion 16, a first matching circuit 17, a second matching circuit 131b, Third matching circuit 141 and switching circuit 18.

The antenna structure 100b further includes a first ground point 210, a second ground point 211, a first feed point 212, a second feed point 213b, and a third feed point 214.

The frame 112 is provided with a first breakpoint 118, a second breakpoint 119 and a slot 120. In this embodiment, both the first breakpoint 118 and the second breakpoint 119 communicate with the slot 120.

In this embodiment, the slot 120, the first breakpoint 118, and the second breakpoint 119 together divide the spaced apart first radiating portion E1 and second radiating portion E2 from the frame 112.

The portion from the first feeding portion 12 to the second ground portion 16 constitutes a branch A1.

The second feeding portion 13 is disposed between the first electronic component 215 and the second side portion 117. One end of the second feeding portion 13 is electrically connected to the second radiating portion E2, and the other end is sequentially connected to the second feeding point 213b and the third feeding point by the second matching circuit 131b and the duplexer 14, respectively 214. The second feeding point 213b and the third feeding point 214 may feed a current signal to the second radiating part E2, so that the second radiating part E2 excites the third mode to generate the third frequency band Radiation signal.

It can be understood that in this embodiment, the difference between the antenna structure 100b and the antenna structure 100 is that the antenna structure 100b further includes a duplexer 14 and a third feed point 214, and the second of the antenna structure 100b The position of the matching circuit 131b is different from the position of the second matching circuit 131 in the antenna structure 100. Specifically, in this embodiment, one end of the second matching circuit 131b is electrically connected to the second feeding portion 13 and the other end is electrically connected to the duplexer 14. In this embodiment, one end of the duplexer 14 is electrically connected to the second matching circuit 131b, and the other end is electrically connected to the third feeding point 214 and the second feeding point 213b.

It can be understood that, in this embodiment, the current path of the antenna structure 100b is the same as the current path of the antenna structure 100, and details are not described herein again.

Example 4

It can be understood that, in other embodiments, the positions of the first breakpoint 118 and the second breakpoint 119 may also be adjusted according to specific conditions. For example, as shown in FIG. 16, the first break point 118c is opened at a position of the second side portion 117 near the end portion 115. The second break point 119c is opened at a position of the end portion 115 close to the first side portion 116. The antenna structure 100 of this embodiment is opposite to the antenna structure 100 of the previous embodiment.

In summary, this creation meets the requirements of the invention patent, and the patent application is filed in accordance with the law. However, the above are only the preferred embodiments of this creation, and the scope of this creation is not limited to the above embodiments. For those who are familiar with the skills of this case, the equivalent modifications or changes made by the spirit of this creation are all It should be covered by the following patent applications.

100, 100a, 100b ‧‧‧ antenna structure 200, 200a, 200b, 200c ‧‧‧ wireless communication device 11‧‧‧Housing 210‧‧‧First ground point 211‧‧‧Second ground point 212‧‧‧First feed point 213, 213b‧‧‧Second feed point 214‧‧‧third feed point 215‧‧‧ First electronic component 216‧‧‧Second electronic component 217‧‧‧The third electronic component 218‧‧‧The fourth electronic component 12‧‧‧First Feeding Department 13‧‧‧Second Feeding Department 14‧‧‧Duplexer 15‧‧‧First Grounding Department 16‧‧‧Second Ground 17‧‧‧ First matching circuit 18‧‧‧Switch circuit 181‧‧‧ switching unit 183‧‧‧Switching element 112‧‧‧Border 113‧‧‧Backboard 201‧‧‧Display unit 114‧‧‧accommodating space 115‧‧‧End 116‧‧‧The first side 117‧‧‧Second side 118, 118c‧‧‧ First breakpoint 119, 119c‧‧‧Second breakpoint 120‧‧‧Slotted E1‧‧‧First Radiation Department E2‧‧‧Second Radiation Department 131, 131b‧‧‧Second matching circuit 141‧‧‧ Third matching circuit 151‧‧‧ Fourth matching circuit A1‧‧‧ Branch

FIG. 1 is a schematic diagram of an antenna structure applied to a wireless communication device according to a first preferred embodiment of the present invention. FIG. 2 is an assembly diagram of the wireless communication device shown in FIG. 1. FIG. 3 is a circuit diagram of the antenna structure shown in FIG. 1. FIG. 4 is a schematic diagram of current flow when the antenna structure shown in FIG. 3 is in operation. FIG. 5 is a circuit diagram of the switching circuit in the antenna structure shown in FIG. 3. 6 is a graph of S-parameters (scattering parameters) when the antenna structure operates in the low-frequency mode of LTE-A when the switching unit switches to different switching elements in the switching circuit shown in FIG. 5. 7 is a radiation efficiency diagram of the antenna structure when the antenna structure works in the low-frequency mode of LTE-A when the switching unit in the switching circuit shown in FIG. 5 switches to different switching elements. 8 is a graph of S-parameters (scattering parameters) when the antenna structure works in the LTE-A intermediate frequency mode and the high frequency mode when the switching unit in the switching circuit shown in FIG. 5 switches to different switching elements. 9 is a radiation efficiency diagram of the antenna structure when the antenna structure works in the LTE-A intermediate frequency mode and the high frequency mode when the switching unit in the switching circuit shown in FIG. 5 switches to different switching elements. FIG. 10 is a graph of S-parameters (scattering parameters) when the antenna structure shown in FIG. 1 works in GPS mode and WIFI 2.4 GHz mode. FIG. 11 is a radiation efficiency diagram when the antenna structure shown in FIG. 1 works in the GPS mode and the WIFI 2.4 GHz mode. FIG. 12 is a graph of S-parameters (scattering parameters) when the antenna structure shown in FIG. 1 works in the WIFI 5GHz mode. FIG. 13 is a radiation efficiency diagram of the antenna structure shown in FIG. 1 when operating in the WIFI 5 GHz mode. 14 is a circuit diagram of the antenna structure of the second preferred embodiment of the present invention. 15 is a circuit diagram of the antenna structure of the third preferred embodiment of the present invention. 16 is a schematic diagram of an antenna structure applied to a wireless communication device according to a fourth preferred embodiment of the present invention.

100‧‧‧ Antenna structure

210‧‧‧First ground point

211‧‧‧Second ground point

212‧‧‧First feed point

213‧‧‧Second feed point

215‧‧‧ First electronic component

216‧‧‧Second electronic component

217‧‧‧The third electronic component

218‧‧‧The fourth electronic component

12‧‧‧First Feeding Department

13‧‧‧Second Feeding Department

15‧‧‧First Grounding Department

16‧‧‧Second Ground

17‧‧‧ First matching circuit

18‧‧‧Switch circuit

112‧‧‧Border

113‧‧‧Backboard

118‧‧‧ First breakpoint

119‧‧‧ Second breakpoint

120‧‧‧Slotted

E1‧‧‧First Radiation Department

E2‧‧‧Second Radiation Department

131‧‧‧ Second matching circuit

141‧‧‧ Third matching circuit

A1‧‧‧ Branch

Claims (11)

An antenna structure is applied to a wireless communication device. The improvement is that the antenna structure includes a housing, a first feed-in portion, a first grounding portion, and a second grounding portion. The housing includes at least a backplane and a frame. The frame is provided on the periphery of the back plate, a slot is provided on the back plate, a first break point, a second break point and a first radiating portion are provided on the frame, the slot is opened on the back The edge of the board is arranged parallel to the frame, and one of the first breakpoint and the second breakpoint is opened at one end of the slot; the first breakpoint and the second breakpoint are both Penetrate and cut off the frame, the frame between the first breakpoint and the second breakpoint constitutes the first radiating portion, and the first grounding portion and the second grounding portion are connected to the frame The first radiating part, the frame between the first feeding part and one of the first grounding part and the second grounding part forms a branch, and the first feeding part is electrically connected to the first A radiating portion and the branch to feed current signals to the first radiating portion and the branch. The antenna structure according to item 1 of the patent application scope, wherein the frame includes at least a terminal portion, a first side portion, and a second side portion, and the first side portion and the second side portion are respectively connected to the terminal At both ends of the portion, the slot is opened inside the end portion and extends toward the direction of the first side portion and the second side portion, respectively, and the first breakpoint is opened at the first The side portion is close to the end portion, and the second break point is opened at the end portion near the second side portion. The antenna structure as described in item 1 of the patent application range, wherein the antenna structure includes a first matching circuit, one end of the first feeding part is connected to the first radiating part and the branch, and the other end is connected by the The first matching circuit is electrically connected to the first feeding point, and is used to feed current signals to the first radiating part and the branch, so that the first radiating part and the branch respectively excite a first mode And a second mode to generate radiated signals in the first frequency band and the second frequency band; the first mode is an LTE-A low frequency mode, and the second mode includes an LTE-A intermediate frequency mode and an LTE-A High frequency mode. The antenna structure as described in item 1 of the patent application range, wherein the antenna structure includes a second feed-in portion and a second matching circuit, the second break point is away from the first radiating portion and the first break point 1 The frame on the side constitutes a second radiating portion, one end of the second feeding portion is connected to the second radiating portion, and the other end is electrically connected to the second feeding point by the second matching circuit, for The second radiation part feeds a current signal, so that the second radiation part excites a third mode to generate a radiation signal in a third frequency band; the third mode includes a GPS mode, a WIFI 2.4GHz mode and One or more of the WIFI 5GHz modes. The antenna structure according to item 3 of the patent application range, wherein the antenna structure includes a switching circuit and a third matching circuit, and one end of the first grounding portion is electrically connected to the first grounding point through the switching circuit, and One end is electrically connected to the first radiating part to provide ground for the first radiating part; one end of the second grounding part is electrically connected to the first radiating part, and the other end is through the third matching circuit The second grounding point is electrically connected to provide grounding for the first radiating portion, and the frame between the first feeding portion and the second grounding portion constitutes the branch. The antenna structure according to item 3 of the patent application range, wherein the antenna structure includes a switching circuit and a third matching circuit, and one end of the first grounding portion is electrically connected to the first grounding point through the third matching circuit , The other end is electrically connected to the first radiating portion to provide grounding for the first radiating portion; one end of the second grounding portion is electrically connected to the first radiating portion, and the other end is through the switching circuit The second grounding point is electrically connected to provide grounding for the first radiating portion, and the frame between the first feeding portion and the first grounding portion constitutes the branch. The antenna structure according to item 4 of the patent application scope, wherein the antenna structure further includes a fourth matching circuit, and the other end of the second feed-in portion is also connected to a third feed through the fourth matching circuit The input point further feeds a current signal to the second radiating part, so that the second radiating part excites the third mode to generate the radiation signal in the third frequency band. The antenna structure according to item 4 of the patent application scope, wherein the antenna structure further includes a duplexer, one end of the duplexer is electrically connected to the second radiating portion through the second matching circuit, and One end is electrically connected to the third feed point and the second feed point, and the second radiation part is fed with a current signal, so that the second radiation part excites the third mode to generate the Radiated signal in the third frequency band. The antenna structure according to item 3 of the patent application scope, wherein the antenna structure further includes a switching circuit, the switching circuit includes a switching unit and a plurality of switching elements, the switching unit is electrically connected to the first radiating portion, The switching elements are connected in parallel with each other, and one end is electrically connected to the switching unit and the other end is grounded. Each switching element has a different impedance. By controlling the switching of the switching unit, the switching unit is switched to Different switching elements further adjust the first frequency band. A wireless communication device including the antenna structure according to any one of patent applications 1-9. The wireless communication device of claim 10, wherein the wireless communication device includes a first electronic component, a second electronic component, a third electronic component, and a fourth electronic component, the first electronic component, the second The electronic component, the third electronic component and the fourth electronic component are all located between the first feeding point of the antenna structure and the second feeding point of the antenna structure; the second break point and the first electron The components correspond so that the first electronic component is partially exposed from the second break point.

Images