TWI661606B - Antenna structure and wireless communication device with same - Google Patents

Abstract

An antenna structure includes a housing, a first feed source, a ground portion, a second feed source, and a radiator. The housing includes a front frame, a back plate, and a frame. The frame is provided with a slot. The front frame is provided with a first breakpoint, a second breakpoint, and a slit. The slot, the first breakpoint, the second breakpoint, and the slit collectively divide a radiating portion and a coupling portion from the casing. The first feed source is electrically connected to the radiating portion, one end of the ground portion is electrically connected to the radiating portion, and the other end is grounded. The radiator and the coupling portion are spaced and coupled, and the second feed An input source is electrically connected to the radiator, and a current from the second feed source is coupled to the coupling portion through the radiator.

Description

Antenna structure and wireless communication device having the same

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

With the advancement of wireless communication technology, wireless communication devices continue to develop toward the trend of thinness and lightness, and consumers have increasingly higher requirements for product appearance. Because metal casings have advantages in appearance, mechanism strength, and heat dissipation effects, more and more manufacturers have designed wireless communication devices with metal casings, such as metal backplanes, to meet consumer demand. However, the metal casing easily interferes with shielding the signals radiated by the antennas arranged in it, and it is not easy to achieve a broadband design, resulting in poor radiation performance of the built-in antenna. Furthermore, the backplane is usually provided with slots and breakpoints, which will affect the integrity and aesthetics of the backplane.

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

An antenna structure includes a housing, a first feed source, a ground portion, a second feed source, and a radiator. The housing includes a front frame, a back plate, and a frame. The frame is sandwiched between the front frame and the front frame. Between the back plates, a slot is provided on the frame, and a first break point, a second break point, and a gap are provided on the front frame. The first break point, the second break point, and the slot are all connected with The slot communicates with and extends to cut off the front frame, and the slot, the first break point, the second break point, and the slit collectively divide a radiation portion and a coupling portion from the housing, and the first A feed source is electrically connected to the radiating part, One end of the grounding portion is electrically connected to the radiating portion, and the other end is grounded. The radiator is coupled to the coupling portion at a distance, and the second feed source is electrically connected to the radiator, from the first portion. The current of the two feed sources is coupled to the coupling portion through the radiator.

A wireless communication device includes the antenna structure described in the above item.

The antenna structure and the wireless communication device having the antenna structure can cover LTE-A low, medium and high frequencies, and the frequency range is wide. In addition, the slot, the first slot, the second slot and the break point on the antenna structure are provided on the front frame and the frame, and are not provided on the back plate, so that the back plate constitutes The all-metal structure, that is, there is no insulation slot, disconnection or break point on the back plate, so that the back plate can avoid affecting the integrity and aesthetics of the back plate due to the setting of the slot, break or break point. Sex.

100‧‧‧ Antenna Structure

11‧‧‧shell

111‧‧‧Front frame

112‧‧‧Backboard

113‧‧‧Border

114‧‧‧accommodation space

115‧‧‧ tip

116‧‧‧First side

117‧‧‧ second side

118‧‧‧Port

120‧‧‧Slotted

121‧‧‧ first breakpoint

122‧‧‧ Second breakpoint

123‧‧‧Gap

12‧‧‧ the first feed source

13‧‧‧Second feed source

14‧‧‧ matching circuit

G1‧‧‧ Ground

15‧‧‧ radiator

151‧‧‧ connecting section

153‧‧‧Coupling section

A1‧‧‧Radiation Department

A11‧‧‧First Radiation Section

A12‧‧‧Second Radiation Section

A2‧‧‧Coupling Department

T1‧‧‧ the first end

T2‧‧‧ second end

17‧‧‧switching circuit

171‧‧‧Switch unit

173‧‧‧switching element

200‧‧‧Wireless communication device

201‧‧‧display unit

202‧‧‧The first electronic component

203‧‧‧Second electronic component

204‧‧‧through hole

FIG. 1 is a schematic diagram of applying an antenna structure to a wireless communication device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of the wireless communication device shown in FIG. 1 from another angle.

FIG. 3 is an assembly diagram of the wireless communication device shown in FIG. 1.

FIG. 4 is a circuit diagram of the antenna structure shown in FIG. 2.

FIG. 5 is a circuit diagram of a switching circuit in the antenna structure shown in FIG. 4.

FIG. 6 is a schematic diagram of a current trend of the antenna structure shown in FIG. 4.

FIG. 7 is a graph of S parameters (scattering parameters) of the antenna structure shown in FIG. 1.

FIG. 8 is a graph of the total radiation efficiency of the antenna structure shown in FIG. 1.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, Generally, all other embodiments obtained by a knowledgeable person without creative work fall into 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 can be a contact connection, for example, a wire connection method, or a non-contact connection method, for example, a non-contact coupling method.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

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

Please refer to FIG. 1 and FIG. 2. A preferred embodiment of the present invention provides an antenna structure 100 that can be applied to wireless communication devices 200 such as mobile phones and personal digital assistants to transmit and receive radio waves to transmit and exchange wireless signals. .

The antenna structure 100 includes a housing 11, a first feed source 12, a second feed source 13, a matching circuit 14, a ground portion G1, and a radiator 15.

The casing 11 may be a casing of the wireless communication device 200. In this embodiment, the casing 11 is made of a metal material. The casing 11 includes a front frame 111, a back plate 112 and a frame 113. The front frame 111, the back plate 112, and the frame 113 may be integrally formed. The front frame 111, the back plate 112, and the frame 113 constitute a casing of the wireless communication device 200. The front frame 111 is provided with an opening (not shown) for receiving the display unit 201 of the wireless communication device 200. It can be understood that the display unit 201 has a display plane, the display plane is exposed from the opening, and the display plane The surface is substantially parallel to the back plate 112.

The back plate 112 is opposite to the front frame 111. The back plate 112 is directly connected to the frame 113, and there is no gap between the back plate 112 and the frame 113. The back plate 112 is equivalent to a place where the antenna structure 100 and the wireless communication device 200 are located.

The frame 113 is sandwiched between the front frame 111 and the back plate 112, and is disposed around the periphery of the front frame 111 and the back plate 112, respectively, so as to communicate with the display unit 201 and the front plate. The frame 111 and the back plate 112 together form an accommodating space 114. The accommodating space 114 is used for accommodating electronic components or circuit modules such as a circuit board and a processing unit of the wireless communication device 200 therein.

The frame 113 includes at least a tip portion 115, a first side portion 116, and a second side portion 117. In this embodiment, the end portion 115 is a bottom end of the wireless communication device 200. The end portion 115 connects the front frame 111 and the back plate 112. The first side portion 116 and the second side portion 117 are disposed opposite to each other, and the two are disposed at both ends of the end portion 115 respectively, and are preferably disposed vertically. The first side portion 116 and the second side portion 117 are also connected to the front frame 111 and the back plate 112.

The frame 113 is further provided with a port 118 and a slot 120. The front frame 111 is provided with a first break point 121, a second break point 122 and a gap 123. The port 118 is opened on the end portion 115 and penetrates the end portion 115.

Please refer to FIG. 2 and FIG. 3 together. The wireless communication device 200 further includes at least one electronic component. In this embodiment, the wireless communication device 200 includes a first electronic component 202 and a second electronic component 203 (see FIG. 3). The first electronic component 202 is a USB module and is disposed in the accommodating space 114. The first electronic component 202 corresponds to the port 118, so that the first electronic component 202 is partially exposed from the port 118. In this way, a user can insert a USB device through the port 118 to establish an electrical connection with the first electronic component 202. The second electronic component 203 is a rear dual camera module.

The back plate 112 is a single metal sheet integrally formed to expose a dual camera module (ie, the second electronic component 203). The back plate 112 is provided with a through hole 204. The back plate 112 is not provided with any slot, break or break point for dividing the insulation of the back plate 112.

In this embodiment, the slot 120 is disposed on the end portion 115 and communicates with the port 118 and extends to the first side portion 116 and the second side portion 117 respectively. The first break point 121, the second break point 122, and the slit 123 are all communicated with the slot 120 and extend to cut off the front frame 111. In this embodiment, the first break point 121 is opened on the front frame 111 and communicates with the first end T1 of the slot 120 disposed on the first side portion 116. The second break point 122 is opened on the front frame 111 and communicates with the second end T2 of the slot 120 disposed on the second side portion 117. The slit 123 is disposed on the front frame 111 between the first end T1 and the second end T2 and communicates with the slot 120. In this way, the slot 120, the first break point 121, the second break point 122, and the gap 123 collectively separate at least the radiating portion A1 and the coupling portion A2 that are disposed at intervals from the casing 11. Wherein, the front frame 111 between the first break point 121 and the slit 123 constitutes the radiation portion A1. The front frame 111 between the second break point 122 and the slit 123 constitutes the coupling portion A2. In this embodiment, the position of the gap 123 does not correspond to the middle of the first break point 121 and the second break point 122, so the length of the radiation portion A1 is greater than the length of the coupling portion A2.

It can be understood that, in this embodiment, in addition to the position of the port 118, the slot 120, the first break point 121, the second break point 122, and the gap 123 are all filled with an insulating material (such as plastic, rubber, Glass, wood, ceramics, etc., but not limited to this).

It can be understood that, in this embodiment, the slot 120 is opened at one end of the frame 113 near the back plate 112 and extends to the front frame 111 so that the radiation portion A1 and the coupling portion A2 are completely It consists of a part of the front frame 111. Of course, in other embodiments, the slotting The opening position of 120 can also be adjusted according to specific needs. For example, the slot 120 is opened at one end of the frame 113 near the back plate 112 and extends in a direction where the front frame 111 is located, so that the radiation portion A1 and the coupling portion A2 are formed by a part of the front frame. 111 and part of the frame 113 are formed.

It can be understood that, in other embodiments, the slot 120 may be provided only at the end portion 115 without extending to any one of the first side portion 116 and the second side portion 117, or the The slot 120 is disposed on the end portion 115 and extends along only one of the first side portion 116 and the second side portion 117. In this way, the positions of the first end T1 and the second end T2, and the positions of the first break point 121 and the second break point 122 can also be adjusted according to the positions of the slot 120. For example, the first end T1 and the second end T2 may both be located at positions of the front frame 111 corresponding to the end portions 115. For example, one of the first end T1 and the second end T2 may be located at a position of the front frame 111 corresponding to the end portion 115, and the other of the first end T1 and the second end T2 may be opened The position of the front frame 111 corresponding to the first side portion 116 or the second side portion 117. Obviously, the shape and position of the slot 120 and the positions of the first end T1 and the second end T2 on the frame 113 can be adjusted according to specific requirements. It is only necessary to ensure that the slot 120, the The first break point 121, the second break point 122, and the gap 123 may jointly divide the radiation portion A1 and the coupling portion A2 disposed at intervals from the casing 11.

It can be understood that, except for the port 118, the slot 120, the first break point 121, the second break point 122, and the gap 123, the lower half of the front frame 111 and the frame 113 are not provided with other insulation slots and breaks. Line or breakpoint, so the lower half of the front frame 111 has only the first breakpoint 121, the second breakpoint 122, and the gap 123, and no other breakpoints.

It can be understood that, in this embodiment, the coupling portion A2 of the antenna structure 100 is grounded. Specifically, one end of the coupling portion A2 near the second breakpoint 122 may be electrically connected to the back plate 112 through a connection structure such as a spring, a probe, a wire, and the like, thereby providing grounding for the coupling portion A2. That is, the second break point 122 disposed at one end of the second side portion 117 is a virtual break point. That is The coupling portion A2 is disposed at a distance from the back plate 112 through the second break point 122, but in fact, an electrical connection relationship exists between the coupling portion A2 and the back plate 112 through a connection structure.

One end of the first feeding source 12 is electrically connected to the radiating portion A1 through the matching circuit 14 to feed current to the radiating portion A1. The other end of the first feed-in source 12 is electrically connected to the backplane 112, that is, grounded. In this embodiment, after a current is fed from the first feed source 12, the current is transmitted to the first break point 121 and the gap 123 at the radiating portion A1, and the radiating portion A1 uses the first The feed source 12 is further divided into a first radiation segment A11 facing the first breakpoint 121 and a second radiation segment A12 facing the gap 123 as a separation point. Specifically, a portion of the first feed source 12 to the front frame 111 provided with the first break point 121 forms the first radiation segment A11. A portion of the first feed source 12 to the front frame 111 provided with the slit 123 forms the second radiation segment A12.

In this embodiment, the position where the first feed source 12 is accessed does not correspond to the middle of the radiating section A1, so the length of the first radiating section A11 is smaller than the length of the second radiating section A12. The first radiation segment A11 excites a first mode to generate a radiation signal in a first frequency band, and the second radiation segment A12 excites a second mode to generate a radiation signal in a second frequency band. In this embodiment, the first mode is an intermediate frequency mode of Long Term Evolution Advanced (LTE-A), and the second mode is an LTE-A low frequency mode. The frequency of the first frequency band is higher than the frequency of the second frequency band. The first frequency band is a band of 1710-2170MHz, and the second frequency band is a band of 699-960MHz.

The ground portion G1 is disposed in the accommodating space 114 and is located between the first break point 121 and the first feeding source 12. One end of the grounding portion G1 is electrically connected to the first radiating section A11, and the other end is electrically connected to the back plate 112, that is, grounding, to provide grounding for the first radiating section A11.

It can be understood that, in this embodiment, by adjusting the ground portion G1 and the first The position of the feeding source 12 can effectively adjust the frequency of the second mode. For example, when the distance between the ground portion G1 and the first feed source 12 decreases, the frequency of the second frequency band is shifted to a low level. When the distance between the ground portion G1 and the first feed source 12 increases, the frequency of the second frequency band shifts higher. In addition, by changing the length of the ground portion G1, that is, adjusting the length of the ground path of the ground portion G1, the frequency and impedance matching of the second frequency band can be effectively adjusted.

In this embodiment, the radiator 15 is disposed in the accommodating space 114 and is disposed near the coupling portion A2. The radiator 15 may be formed by a Flexible Printed Circuit (FPC) or a Laser Direct Structuring (LDS) process. The radiator 15 is substantially in the shape of an L-shaped sheet, and includes a connecting section 151 and a coupling section 153. The connecting section 151 is substantially arc-shaped, and one end of the connecting section 151 is electrically connected to the second feeding source 13 for feeding a current signal to the radiator 15. The other end of the second feeding source 13 is grounded. The coupling section 153 is substantially straight. One end of the coupling section 153 is vertically connected to the connection section 151 and extends in a direction parallel to the end portion 115 and close to the first side portion 116.

It can be understood that, in this embodiment, the second feed source 13 and the radiator 15 constitute a monopole antenna. When a current is fed from the second feed source 13, the current will flow through the radiator 15 and be coupled to the coupling section A2 through the coupling section 153, and then be grounded through the coupling section A2. , So that the second feed source 13, the radiator 15 and the coupling portion A2 together constitute a coupled feed antenna. The coupled feed-in antenna is used to excite a third mode to generate a radiation signal in a third frequency band. In this embodiment, the third mode is an LTE-A high-frequency mode, and the frequency of the third frequency band is higher than the frequency of the second frequency band. The third frequency band is a frequency band of 2300-2690MHz.

Please refer to FIG. 4 together. It can be understood that, in this embodiment, the width S of the gap 123 is ≧ 0.5 mm. Preferably, the width S of the slit 123 is 2 mm. The length of the coupling section 153 in the radiator 15 is L. A first distance between the coupling section 153 in the radiator 15 and a portion of the coupling portion A2 located at the end portion 115 is K. The coupling in the radiator 15 A second distance between the segment 153 and a portion of the coupling portion A2 located on the second side portion 117 is U. The first distance K satisfies a formula of 0.5 mm ≦ K ≦ 5 mm. Preferably, the first distance K is 1.5 mm, and the second distance U is 1 mm.

It can be understood that in this embodiment, the frequency of the third frequency band of the antenna structure 100 can be effectively adjusted by adjusting the length L of the coupling section 153 in the radiator 15. In addition, by optimizing the first distance K, the effect of increasing the bandwidth can be achieved, so that the high frequency of the antenna structure 100 covers 2300-2690 MHz.

Understandably, please refer to FIG. 1, FIG. 2 and FIG. 4 again. In other embodiments, in order to make the second radiation section A12 have a better low-frequency bandwidth, the antenna structure 100 may further include a switching circuit 17. One end of the switching circuit 17 is electrically connected to the second radiating section A12, and the other end is electrically connected to the back plate 112, that is, grounded.

Please refer to FIG. 5 together. The switching circuit 17 includes a switching unit 171 and at least one switching element 173. The switching unit 171 is electrically connected to the second radiation section A12. The switching element 173 may be an inductor, a capacitor, or a combination of an inductor and a capacitor. The switching elements 173 are connected in parallel with each other, and one end of the switching elements 173 is electrically connected to the switching unit 171, and the other end is electrically connected to the back plate 112, that is, grounded. In this way, by controlling the switching of the switching unit 171, the second radiation segment A12 can be switched to a different switching element 173. Since each switching element 173 has a different impedance, the LTE-A low-frequency band of the second radiation segment A12 can be adjusted by the switching of the switching unit 171.

For example, in this embodiment, the switching circuit 17 includes four switching elements 173. The four switching elements 173 are all inductors, and the inductance values are 6.2nH, 20nH, 100nH, and 120nH, respectively. When the switching unit 171 switches to a switching element 173 with an inductance value of 6.2 nH, the antenna structure 100 can work in the GSM900 frequency band (880-960MHz). When the switching unit 171 is switched to a switching element 173 having an inductance value of 20 nH, the antenna structure 100 may work at LTE band 20 (791-862MHz). When the switching unit 171 switches to a switching element 173 with an inductance value of 100 nH and 120 nH, the antenna structure 100 can work in the LTE band 28 frequency band (703-804 MHz). That is, by switching of the switching unit 171, the low frequency of the antenna structure 100 can be covered to 703-960 MHz.

Please refer to FIG. 6 together. When the current enters from the first feed source 12, the current will flow into the first radiating section A11, and be grounded through the grounding portion G1 (see path P1), thereby making all The first feed source 12, the first radiation section A11, and the ground portion G1 constitute an inverted-F antenna to excite the first mode to generate a radiation signal in a first frequency band. In addition, after the current enters from the first feed source 12, the current will also flow into the second radiating section A12, and be grounded through the switching circuit 17 (see path P2), so that the first feed The input source 12, the second radiating section A12, and the switching circuit 17 constitute an inverted-F antenna to excite a second mode to generate a radiation signal in a second frequency band. When a current is fed from the second feed source 13, the current will flow through the radiator 15 and be coupled to the coupling portion A2, so that the second feed source 13, the radiator 15, and the The coupling part A2 collectively constitutes a coupling feed-in antenna, which is further used to excite the third mode to generate a radiation signal in a third frequency band.

It can be understood that, in this embodiment, the back plate 112 can be used as a place for the antenna structure 100 and the wireless communication device 200. In another embodiment, a shielding mask for shielding electromagnetic interference or a middle frame supporting the display unit 201 may be provided on a side of the display unit 201 facing the back plate 112. The shielding cover or the middle frame is made of a metal material. The shield cover or the middle frame can be connected to the back plate 112 to serve as a place for the antenna structure 100 and the wireless communication device 200. At each of the above grounds, the shield cover or middle frame can replace the back plate 112 for grounding the antenna structure 100 or the wireless communication device 200. In another embodiment, the main circuit board of the wireless communication device 200 may be provided with a ground plane, which is grounded at each of the above locations. The ground plane may replace the backplane 112 for the antenna structure 100 or the antenna structure 100. Wireless The communication device 200 is grounded. The ground plane may be connected to the shield cover, the middle frame, or the back plate 112.

FIG. 7 is a graph of S parameters (scattering parameters) of the antenna structure 100. The curve S71 is the S11 value when the radiating part A1 works in the LTE-A low-frequency and intermediate-frequency modes. The curve S72 is the S11 value when the radiator 15 operates in the LTE-A high-frequency mode. The curve S73 is the isolation between the radiation portion A1 and the radiator 15.

FIG. 8 is a total radiation efficiency diagram of the antenna structure 100. The curves S81 and S82 are the total radiation efficiency of the radiating portion A1 when the switching unit 171 in the switching circuit 17 switches to a different switching element 173. Curve S83 is the total radiation efficiency of the radiator 15 when it operates in the LTE-A high-frequency mode.

As described above, the antenna structure 100 defines the radiation portion A1 and the coupling portion A2 from the casing 11 by setting the first break point 121, the second break point 122, and the slot 123. The antenna structure 100 is further provided with a radiator 15. The radiating part A1 can excite the first mode and the second mode to generate radiation signals of LTE-A low frequency and intermediate frequency bands. The radiator 15 can cooperate with the coupling part A2 to excite a third mode to generate a radiation signal in the LTE-A high frequency band. Therefore, the wireless communication device 200 can use the Carrier Aggregation (CA) technology of LTE-A and use the radiating part A1, the coupling part A2, and the radiator 15 to receive or transmit in multiple different frequency bands at the same time. The wireless signal can increase the transmission bandwidth and realize 3CA at the same time, without the need to additionally set the corresponding duplexer.

In addition, the antenna structure 100 is provided with the housing 11, and the port 118, the slot 120, the first break point 121, the second break point 122, and the slot 123 on the housing 11 are provided at the front. The frame 111 and the frame 113 are not disposed on the back plate 112. In this way, only the front frame 111, the frame 113, and the corresponding inner radiator, namely the radiator 15, can be used to set up corresponding LTE-A low, middle and high frequency antennas, covering a wide frequency band. Furthermore, the back plate 112 constitutes a whole Metal structure, that is, there is no insulation slot, disconnection or break point on the back plate 112, so that the back plate 112 can avoid affecting the integrity of the back plate 112 due to the setting of the slot, break or break point And aesthetics.

The above descriptions are merely preferred embodiments of the present invention, and are not intended to limit the present invention in any form. In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made in accordance with the spirit of the present invention should be included in the scope of the present invention.

Claims (9)

An antenna structure includes a housing, a first feed source, a ground portion, a second feed source, and a radiator. The housing includes a front frame, a back plate, and a frame. The frame is sandwiched between the front frame and the front frame. Between the back plates, a slot is provided on the frame, and a first break point, a second break point, and a gap are provided on the front frame. The first break point, the second break point, and the slot are all connected with The slot communicates with and extends to cut off the front frame, and the slot, the first break point, the second break point, and the slit collectively divide a radiation portion and a coupling portion from the housing, and the first A feed source is electrically connected to the radiating portion, one end of the ground portion is electrically connected to the radiating portion, and the other end is grounded. The radiator is coupled to the coupling portion at intervals, and the second feed source is electrically connected to the radiating portion. Connected to the radiator, and a current from the second feed source is coupled to the coupling portion through the radiator; the first feed source is electrically connected to the radiator to further connect the radiator The radiating section is divided into a first radiating section and a second radiating section, and the first feed source is provided with the front frame to the front frame. A portion of a breakpoint forms the first radiation segment, a portion of the first feed source to the front frame provided with the gap forms the second radiation segment, and the ground portion is located on the first break Between the point and the first feed source, and electrically connected to the first radiation segment. The antenna structure according to item 1 of the patent application scope, wherein the frame includes at least an end 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 ends. At both ends of the portion, the slot is opened at least at the end portion, the first break point communicates with the first end of the slot disposed at the first side portion, and the second break point The slot is arranged on the second end of the second side portion to communicate, the slot is provided on the front frame between the first end and the second end and communicates with the slot, and the first The front frame between a breakpoint and the slit constitutes the radiating portion, the front frame between the second breakpoint and the slit constitutes the coupling portion, and the coupling portion is grounded. The antenna structure according to item 1 of the scope of patent application, wherein when a current enters from the first feed source, the current flows into the first radiating section and is grounded through the grounding portion, thereby exciting the first mode. State to generate a radiation signal in a first frequency band; when a current enters from the first feed source, a current flows into the second radiation segment, so that the second radiation segment excites a second mode to generate a second frequency band A radiation signal; when a current is fed from the second feed source, the current flows through the radiator and is coupled to the coupling portion, thereby exciting a third mode to generate a radiation signal in a third frequency band. The antenna structure according to item 3 of the scope of the patent application, wherein the frequency of the third frequency band is higher than the frequency of the first frequency band, and the frequency of the first frequency band is higher than the frequency of the second frequency band. The antenna structure according to item 3 of the scope of patent application, wherein the frequency of the third frequency band is adjusted by adjusting the length of the radiator; and the distance between the radiator and the coupling portion is adjusted by adjusting the length of the radiator To adjust the bandwidth of the third frequency band; to adjust the frequency of the second mode by adjusting the position of the ground portion and the first feed source; by adjusting the length of the ground portion To adjust the frequency and impedance matching of the second frequency band. The antenna structure according to item 3 of the scope of patent application, wherein the antenna structure further includes a switching circuit, the switching circuit includes a switching unit and at least one switching element, and the switching unit is electrically connected to the second radiating section, 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. By controlling the switching of the switching unit, the switching unit is switched to a different switching element, thereby adjusting the switching element. The second frequency band. The antenna structure according to item 1 of the scope of patent application, wherein the slot, the first break point, the second break point, and the gap are filled with an insulating material. The antenna structure according to item 1 of the scope of patent application, wherein the wireless communication device uses carrier aggregation technology and uses the radiating part, the coupling part and the radiator to simultaneously receive or send wireless signals in multiple different frequency bands. A wireless communication device includes the antenna structure according to any one of claims 1-8 of the scope of patent application.