TWI626789B - Antenna structure and wireless communication device with same - Google Patents

Abstract

The present invention provides an antenna structure, including a metal member, the metal member is provided with at least one slot, and the at least one slot divides the metal member into at least a first joint portion and a second joint portion; a feeding portion, the feeding portion feeding a current signal to the first joint portion; a ground portion, the ground portion providing a ground for the first joint portion; and a radiator for feeding a current signal The first bonding portion, the feeding portion and the ground portion constitute a first antenna of the antenna structure for exciting the first mode to generate a radiation signal of the first frequency band, The second combining portion and the radiator form a second antenna of the antenna structure for exciting the second mode to generate a radiation signal of the second frequency band.

Description

Antenna structure and wireless communication device using the same

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

With the advancement of wireless communication technology, wireless communication devices are constantly moving toward a thin and light trend, and consumers are increasingly demanding the appearance of products. Due to the advantages of metal casing in terms of appearance, mechanism strength, and heat dissipation effect, more and more manufacturers have designed wireless communication devices with metal casings to meet the needs of consumers. However, the metal casing easily interferes with the signal radiated by the antenna disposed therein, and the broadband design is not easily achieved, resulting in poor radiation performance of the built-in antenna. And with the continuous development of Long Term Evolution (LTE) technology, the bandwidth of the antenna continues to increase. Therefore, how to design an antenna with a wider bandwidth by using a metal casing is an important issue in antenna design.

In view of this, it is necessary to provide an antenna structure that incorporates a metal housing design.

In addition, it is necessary to provide a wireless communication device to which the antenna structure is applied.

An antenna structure includes: a metal member, the metal member is provided with at least one slot, and the at least one slot divides the metal member into at least a first joint portion and a second joint portion; a feeding portion electrically connected to the first bonding portion and feeding a current signal to the first junction portion; a ground portion electrically connected to the first bonding portion and The first bonding portion provides a ground; and a radiator for electrically connecting to the second bonding portion and feeding a current signal to the second bonding portion; wherein the first bonding portion The feed portion and the ground portion constitute a first antenna of the antenna structure for exciting the first mode to generate a radiation signal of the first frequency band, and the second combining portion and the radiator form the antenna structure The second antenna is configured to excite the second mode to generate a radiation signal of the second frequency band.

A wireless communication device includes the above antenna structure.

The antenna structure is configured to divide the metal member into three joints by using two slots on the metal member, and one of the joint portions constitutes a first antenna of the antenna structure to generate a multi-band operation bandwidth. And by setting the first switching circuit, the frequency of the low frequency band can be adjusted to cover the operation of the multi-band of the GSM/WCDMA/LTE system. In addition, the antenna structure also has another combining portion as the second antenna to meet the requirements of LTE carrier aggregation.

100, 300‧‧‧ antenna structure

11‧‧‧Metal parts

111‧‧‧First border

1111‧‧‧ first joint

1113‧‧‧Second junction

1115‧‧‧ Third Joint Department

111‧‧‧First border

112‧‧‧second border

113‧‧‧ third border

114‧‧‧fourth border

116‧‧‧First slotting

117‧‧‧Second slotting

12‧‧‧Feeding Department

13‧‧‧ Grounding Department

15‧‧‧First switching circuit

151‧‧‧Switch unit

153‧‧‧Switching components

16‧‧‧ radiator

161‧‧‧Feeding section

163‧‧‧ Radiation Department

165‧‧‧ Grounding section

166‧‧‧First radiant section

167‧‧‧second radiant section

168‧‧‧the third radiant section

169‧‧‧fourth radiant section

A1‧‧‧first antenna

A2‧‧‧second antenna

A3‧‧‧ third antenna

A4‧‧‧fourth antenna

200/400‧‧‧Wireless communication device

21‧‧‧Substrate

211‧‧‧ first feed point

212‧‧‧second feed point

213‧‧‧ Grounding point

215‧‧‧ clearance area

23‧‧‧First matching circuit

231‧‧‧First matching component

233‧‧‧Second matching component

25‧‧‧Second matching circuit

251‧‧‧ third matching component

253‧‧‧fourth matching component

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

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

3 is a circuit diagram of a first switching circuit in the antenna structure shown in FIG. 1.

4 is a circuit diagram of a first matching circuit in the antenna structure shown in FIG. 1.

FIG. 5 is a circuit diagram of a second matching circuit in the antenna structure shown in FIG. 1. FIG.

Fig. 6 is a graph showing S parameters (scattering parameters) of the antenna structure shown in Fig. 1.

Figure 7 is a graph showing the radiation efficiency of the antenna structure shown in Figure 1.

FIG. 8 is a graph showing S-parameters (scattering parameters) of the antenna structure shown in FIG. 1 operating in the LTE Band 5 band and the Band 7 band using carrier aggregation technology.

FIG. 9 is a schematic diagram of a wireless communication device having an antenna structure according to a second preferred embodiment of the present invention.

10-12 are graphs of S parameters (scattering parameters) of the antenna structure shown in FIG. 9 operating in the LTE Band 5 band and the Band 7 band using carrier aggregation technology.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without the creative work are all within the scope of the present invention.

It should be noted that when an element is referred to as "electrically connected" to another element, it can be directly on the other element or the element can be present. When an element is considered to be "electrically connected" to another element, it can be a contact connection, for example, a wire connection or a non-contact connection, for example, a non-contact coupling.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art. The terminology used in the description of the invention herein is for the purpose of describing the particular embodiments. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below may be combined with each other without conflict.

Referring to FIG. 1 and FIG. 2, a first preferred embodiment of the present invention provides an antenna structure 100 for use in a wireless communication device 200 such as a mobile phone or a personal digital assistant for transmitting and receiving radio waves for transmitting and exchanging wireless signals. Signal.

The wireless communication device 200 also includes a substrate 21. The substrate 21 can be made of a dielectric material such as epoxy glass fiber (FR4). The substrate 21 is provided with a first feed point 211, a second feed point 212, and a ground point 213. The first feed point 211 and the second feed point 212 are spaced apart from each other on the substrate 21 for feeding current to the antenna structure 100. The grounding point 213 is disposed between the first feeding point 211 and the second feeding point 212 for providing grounding for the antenna structure 100. A clearance area 215 is further disposed on the substrate 21. The clearance area 215 is disposed on one side of the substrate 21. The clearing area 215 refers to a region on the substrate 21 where no conductor is stored, so as to prevent external components such as a battery, a vibrator, a horn, a charge coupled device (CCD), and the like in the environment. Interference occurs, causing its operating frequency to shift or the radiation efficiency to be low. In the embodiment, the size of the clearance area 215 is approximately 74*5 mm 2 .

The antenna structure 100 includes a metal member 11, a feeding portion 12, a ground portion 13, a first switching circuit 15, and a radiator 16. The metal member 11 is an appearance component of the wireless communication device 200, such as gold. Belongs to the border. In the embodiment, the metal member 11 is a frame structure, and includes a first frame 111, a second frame 112, a third frame 113, and a fourth frame 114. The first frame 111 is opposite to the fourth frame 114 and disposed parallel to each other. The second frame 112 is opposite to the third frame 113 and parallel to each other, and is respectively connected to both ends of the first frame 111 and the fourth frame 114. The first frame 111 , the second frame 112 , the third frame 113 , and the fourth frame 114 are disposed together around the substrate 21 , and the first frame 111 is disposed adjacent to the clearance area 215 .

The first frame 111 is provided with two slots, that is, a first slot 116 and a second slot 117. The width of the first slot 116 and the second slot 117 may be 0.8-2.0 mm. In this embodiment, the first slot 116 and the second slot 117 have a width of 1.5 mm. The first slot 116 and the second slot 117 divide the metal member 11 into three joint portions that are spaced apart from each other. The metal member 11 between the first slot 116 and the second slot 117 constitutes a first joint portion 1111. The metal member 11 on the side of the second slot 117 away from the first joint portion 1111 constitutes a second joint portion 1113. The metal member 11 of the first slot 116 away from the first joint portion 1111 forms a third joint portion 1115. In the embodiment, the second bonding portion 1113 and the third bonding portion 1115 are electrically connected to the ground plane of the substrate 21 by at least one grounding point, thereby providing grounding for the antenna structure 100.

The feeding portion 12 is disposed adjacent to the first slot 116. One end of the feeding portion 12 is electrically connected to the first feeding point 211 by an antenna separating filter (not shown), and the other end is electrically connected to the first bonding portion 1111. One end of the grounding portion 13 is electrically connected to the grounding point 213, and the other end is electrically connected to the first bonding portion 1111. In this way, when the current is fed from the first feed point 211, the feed portion 12 flows into the first joint portion 1111, and then flows into the ground point 213 through the ground portion 13, thereby further The first bonding portion 1111 is configured to form the first antenna A1 of the antenna structure 100, thereby exciting a first mode to generate a radiation signal of the first frequency band. In this embodiment, the first mode is a low frequency mode. Referring to FIG. 3 together, the first switching circuit 15 includes a switching unit 151 and at least one switching element 153. In the embodiment, the first switching circuit 15 includes three switching elements 153. The three switching elements 153 are all inductive, and the inductance values are 9nH, 12nH, and 22nH, respectively. The switching unit 151 is electrically connected to the ground portion 13. The switching elements 153 are connected in parallel with each other, and one end thereof is electrically connected to the switching unit 151, and the other end is grounded. As such, by controlling the switching of the switching unit 151, the first combining portion 1111 can be switched to a different switching element 153. Since each switching element 153 has a different inductance, the first frequency band of the first mode of the first antenna A1 can be adjusted by the switching of the switching unit 151.

For example, when the switching unit 151 is switched to the switching element 153 having an inductance value of 9 nH, the antenna structure 100 can operate in the Band 8 band (880-960 MHz). When the switching unit 151 is switched to the switching element 153 having an inductance value of 12 nH, the antenna structure 100 can operate in the LTE Band 5 band (824-894 MHz). When the switching unit 151 is switched to the switching element 153 having an inductance value of 22 nH, the antenna structure 100 can operate in the Band 17 band (704-746 MHz).

Of course, it can be understood that the switching element 153 is not limited to the inductance described in the above item, and may also be a capacitor or a combination of an inductor and a capacitor. In addition, the number of the switching elements 153 is not limited to three, and the number thereof can be adjusted according to actual conditions.

Referring to FIG. 2 again, the radiator 16 is disposed adjacent to the second joint portion 1113 and disposed above the clearance portion 215. The radiator 16 includes a feeding section 161, a radiating portion 163, and a grounding portion 165. The feeding section 161 has a substantially rectangular strip shape and is disposed in a plane perpendicular to the substrate 21. One end of the feeding section 161 can be electrically connected to the second feeding point 212 by a connecting element such as a feed line, a metal dome, a probe, etc., and the other end is electrically connected to the radiating part 163 for feeding An electric current is supplied to the radiation portion 163. The radiation portion 163 is entirely disposed in a plane parallel to the substrate 21. The radiating portion 163 includes a first radiating section 166, a second radiating section 167, a third radiating section 168, and a fourth radiating section 169. The first radiant section 166 is substantially rectangular strip-shaped. One end of the first radiant section 166 is vertically connected to the feed section 161. The other end of the first radiating section 161 extends in a direction parallel to the first frame 111 and toward the second frame 112 until it is connected to the second frame 112. The second radiant section 167 is substantially rectangular strip-shaped. The second radiating section 167 is vertically connected to the first radiating section 166 near one side of the second bezel 112. The other end of the second radiating section 167 extends in a direction parallel to the second frame 112 and adjacent to the first frame 111. One end of the third radiating section 168 is perpendicularly connected to the end of the second radiating section 167 away from the first radiating section 166, and the other end is parallel to the first radiating section 166 and adjacent to the third bezel 113. The direction extends. The fourth radiant section 169 is substantially rectangular strip-shaped. One end of the fourth radiating section 169 is perpendicularly connected to the third radiating section 168 away from one end of the second radiating section 167, and the other end is parallel to the second radiating section 167 and adjacent to the first frame 111 The direction extends until it is electrically connected to one end of the first bezel 111 adjacent to the second slot 117.

The grounding segment 165 is disposed in a plane perpendicular to the substrate 21. One end of the grounding section 165 is electrically connected to one end of the first radiating section 166 near the second frame 112, and the other end is grounded by a matching circuit (not shown). As such, when the current is fed from the second feed point 212, the feed portion 161 flows into the radiating portion 163, and then the ground portion 165 is grounded, thereby enabling the second combination. The portion 1113 and the radiator 16 form a second antenna A2 of the antenna structure 100 and excite a second mode to generate a radiation signal of the second frequency band. In this embodiment, the second mode is a high frequency mode. It can be understood that the matching circuit is used to adjust the impedance matching of the antenna structure 100.

It can be understood that in other embodiments, the first feed point 211 can also be electrically connected to the feed portion 12 by the first matching circuit 23 . The second feed point 212 can be electrically connected to the radiator 16 by a second matching circuit 25.

Referring to FIG. 4 , in the embodiment, the first matching circuit 23 includes a first matching component 231 and a second matching component 233 . One end of the first matching component 231 is electrically connected to the first feeding point 211, and the other end is electrically connected to one end of the second matching component 233 and the feeding portion 12. The other end of the second matching element 233 is grounded. In this embodiment, the first matching component 231 is a capacitor having a capacitance value of 1.5 pF. The second matching component 233 is an inductor having an inductance value of 16 nH. Of course, in other embodiments, the first matching component 231 is not limited to the capacitor described in the above item, and may also be an inductor or a combination of an inductor and a capacitor. Similarly, the second matching component 233 is not limited to the inductance described in the above item, and may also be a capacitor or a combination of an inductor and a capacitor.

Referring to FIG. 5 , in the embodiment, the second matching circuit 25 includes a third matching component 251 and a fourth matching component 253 . One end of the third matching component 251 is electrically connected to the second feed point 212, and the other end is electrically connected to one end of the fourth matching component 253 and the radiator 16. The other end of the fourth matching element 253 is grounded. In this embodiment, the third matching component 251 is an inductor having an inductance value of 8 nH. The fourth matching component 253 is a capacitor having a capacitance value of 500 fF. Of course, in other embodiments, the third matching component 251 is not limited to the inductance described in the above item, and may also be a capacitor or a combination of an inductor and a capacitor. Similarly, the fourth matching component 253 is not limited to the capacitance described in the above item, and may also be an inductor or a combination of an inductor and a capacitor.

Please refer to FIG. 6 as a graph of S parameters (scattering parameters) of the antenna structure 100. The curve S41 is the S11 value when the first switching circuit 15 in the antenna structure 100 is switched to the switching element 153 having an inductance value of 9 nH. The curve S42 is the S11 value when the first switching circuit 15 in the antenna structure 100 is switched to the switching element 153 having an inductance value of 12 nH. A curve S43 is an S11 value when the first switching circuit 15 in the antenna structure 100 is switched to the switching element 153 having an inductance value of 22 nH. Obviously, when the first switching circuit 15 is switched to different switching elements 153, the antenna structure 100 can operate in different low frequency bands, such as Band8 frequency band (880-960 MHz, corresponding to GSM900), LTE Band 5 frequency band (824). -894MHz, corresponding to GSM850), Band17 band (704-746MHz, BTE band17). In addition, the antenna structure 100 can also meet antenna design requirements in corresponding high frequency bands, such as GSM1800/1900, UMTS 2100, and LTE Band7.

Please refer to FIG. 7 for a graph of the radiation efficiency of the antenna structure 100. The curve S51 is the radiation efficiency when the first switching circuit 15 in the antenna structure 100 is switched to the switching element 153 having an inductance value of 9 nH. The curve S52 is the radiation efficiency when the first switching circuit 15 in the antenna structure 100 is switched to the switching element 153 having an inductance value of 12 nH. The curve S53 is the radiation efficiency when the first switching circuit 15 in the antenna structure 100 is switched to the switching element 153 having an inductance value of 22 nH. Obviously, the antenna structure 100 can be completely switched to cover the system bandwidth required by the currently used communication systems such as GSM/WCDMA/LTE by the switching of the first switching circuit 15, and meets the antenna design requirements, and has better performance. Radiation efficiency, such as antenna radiation efficiency, is above 45%.

As described above, the antenna structure 100 feeds a current signal to the first combining portion 1111 through the first feeding point 211 to form a first antenna A1, thereby generating an operation bandwidth of a multi-band. And by the switching of the first switching circuit 15, the antenna structure 100 is covered to a GSM/WCDMA/LTE system. Furthermore, the antenna structure 100 is provided by the second antenna A2 The setting can meet the requirements of Carrier Aggregation (CA) of LTE-Advanced, such as Band3+Band7 band and Band20+Band7 band. That is, the wireless communication device 200 can use the carrier aggregation technology and use the first antenna A1 and the second antenna A2 to simultaneously receive or transmit wireless signals in a plurality of different frequency bands.

Please refer to FIG. 8 for the S-parameter (scattering parameter) graph of the antenna structure 100 operating in the LTE Band 5 band and the Band 7 band by using the carrier aggregation technology. The curve S61 is the S11 value of the first antenna A1 when the first switching circuit 15 in the antenna structure 100 is switched to the switching element 153 having an inductance value of 12nH. The curve S62 is the S11 value of the second antenna A2 when the grounding segment 165 of the antenna structure 100 is grounded by a capacitor having a capacitance value of 0.8 pf. The curve S63 is the isolation of the antenna structure 100 when operating in the LTE Band 5 band and the Band 7 band simultaneously. Obviously, when the wireless communication device 200 uses the carrier aggregation technology to simultaneously receive or transmit wireless signals in two different frequency bands (LTE Band 5 band and Band 7 band), the isolation is lower than -10 dB, which is in accordance with the antenna design requirements.

It can be understood that in other embodiments, the ground segment 165 of the second antenna A2 can also be connected to a corresponding second switching circuit (not shown). The structure and function of the second switching circuit may be the same as the first switching circuit 15, and details are not described herein again. Thus, by switching the second switching circuit, the second antenna A2 can be operated in different frequency bands and realize a combination of different frequency bands. For example, by switching the second switching circuit, the second antenna A2 can be operated only in the GPS band. By switching the second switching circuit, the second antenna A2 can be operated only in the BT band or the WIFI band. The second frequency band of the second mode can be adjusted by the switching of the second switching circuit, so that the second antenna A2 operates in the GPS band and the Band7 band. The second antenna A2 can be operated in the GPS frequency band and the BT frequency band or the GPS frequency band and the WIFI frequency band by switching the second switching circuit.

Referring to FIG. 9 , a wireless communication device 400 according to a second preferred embodiment of the present invention is different from the wireless communication device 200 in that the wireless communication device 400 further includes a third antenna A3 and a fourth Antenna A4. The third antenna A3 and the fourth antenna A4 are disposed opposite to the first antenna A1 and the second antenna A2, that is, the third antenna A3 and the fourth antenna A4 are disposed on the wireless communication device 400. One end. In this embodiment, the structure of the third antenna A3 is consistent with the structure of the first antenna A1, and the structure of the fourth antenna A4 is consistent with the structure of the second antenna A2, and details are not described herein.

In this embodiment, the first antenna A1 is a main antenna, and the third antenna A3 is a diversity antenna. Please refer to FIG. 10-12 for the S-parameter (scattering parameter) graph of the LTE Band 5 band and the LTE Band 7 band for the antenna structure 300 using the carrier aggregation technology. The curves S81, S91, and S101 are S11 values when the third antenna A3 in the antenna structure 300 is switched to the LTE Band5 frequency band. Curves S82, S92, and S102 are S11 values when the fourth antenna A4 in the antenna structure 300 operates in the LTE Band 7 band. Curves S83, S93, and S103 are S11 values when the first antenna A1 in the antenna structure 300 is switched to the LTE Band 5 band. Curves S84, S94, and S104 are S11 values when the second antenna A2 in the antenna structure 300 operates in the LTE Band 7 band. Curve S85 is the isolation between the first antenna A1 and the third antenna A3 in the antenna structure 300. Curve S86 is the isolation between the third antenna A3 and the fourth antenna A4 in the antenna structure 300. Curve S87 is the isolation between the second antenna A2 and the third antenna A3 in the antenna structure 300. Curve S95 is the isolation between the first antenna A1 and the second antenna A2 in the antenna structure 300. curve S96 is the isolation between the first antenna A1 and the fourth antenna A4 in the antenna structure 300. Curve S105 is the isolation between the second antenna A2 and the fourth antenna A4 in the antenna structure 300.

Obviously, when the wireless communication device 400 uses the carrier aggregation technology to simultaneously receive or transmit wireless signals in two different frequency bands (LTE Band 5 band and Band 7 band), the isolation between each two different antennas is low. At -10dB, in line with the design requirements of the antenna.

It can be understood that in other embodiments, the third antenna A3 can also be configured as a diversity antenna, and the fourth antenna A4 is configured as a GPS antenna, and is implemented by setting a duplexer (not shown). The separation of signals.

The antenna structure 100/300 of the present invention divides the metal member 11 into three joints by providing two slots on the metal member 11, and one of the joint portions constitutes a first antenna of the antenna structure 100. To generate the operating bandwidth of the multi-band, and by the setting of the first switching circuit 15, the frequency of the low-frequency band can be adjusted to cover the operation of the multi-band of the GSM/WCDMA/LTE system. In addition, the antenna structure 100/300 also has another combining portion as the second antenna to meet the requirements of LTE carrier aggregation.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. In addition, those skilled in the art can make other changes in the spirit of the present invention. Of course, the changes made in accordance with the spirit of the present invention should be included in the scope of the present invention.

Claims (11)

An antenna structure is improved in that the antenna structure includes: a metal member, the metal member is provided with at least one slot, and the at least one slot divides the metal member into at least a first joint portion that is spaced apart And a second bonding portion; the feeding portion is electrically connected to the first bonding portion, and feeds a current signal to the first bonding portion; a ground portion electrically connected to the first portion a bonding portion, and providing grounding for the first bonding portion; and a radiator for electrically connecting with the second bonding portion and feeding a current signal to the second bonding portion; The first combining portion, the feeding portion and the ground portion constitute a first antenna of the antenna structure for exciting a first mode to generate a radiation signal of a first frequency band, and the second combining portion and the radiator constitute a second antenna of the antenna structure for exciting a second mode to generate a radiation signal of a second frequency band; wherein the radiator includes a feeding section, a radiating part and a grounding section, and the feeding section is electrically connected To the radiation portion for feeding electricity To the radiating portion, the radiating portion is disposed in a plane perpendicular to the feeding portion, the grounding portion is disposed in a plane perpendicular to the radiating portion, and one end of the grounding portion is electrically connected to the One end of the radiation part and the other end is grounded. The antenna structure of claim 1, wherein the metal member comprises a first frame, a second frame, a third frame, and a fourth frame, the first frame and the fourth side The second frame is opposite to the third frame and is disposed parallel to each other and is respectively connected to the two ends of the first frame and the fourth frame. The at least one slot includes the first slot. And the second slot, the first slot and the second slot are formed on the first frame, and the metal member between the first slot and the second slot forms a first joint, The metal member on the side of the second slot away from the first joint portion constitutes the second joint portion, and the metal member on the side of the first slot away from the first joint portion also constitutes a third joint portion. The second joint portion and the third joint portion are both grounded. The antenna structure of claim 1, wherein the antenna structure further comprises a first switching circuit, the first switching circuit comprising a switching unit and at least one switching element, the switching unit being electrically connected to the ground The switching elements are connected in parallel with each other, and one end thereof is electrically connected to the switching unit, and the other end is grounded. By controlling switching of the switching unit, the switching unit is switched to different switching elements, and then adjusted. The first frequency band. The antenna structure of claim 2, wherein the radiating portion comprises a first radiating section, a second radiating section, a third radiating section and a fourth radiating section, and one end of the first radiating section is vertically connected to In the feeding section, the other end of the first radiating section extends in a direction parallel to the first frame and toward the second frame until connected to the second frame, and the second radiating section is vertically connected And the first radiating section is adjacent to one side of the second frame, and the other end of the second radiating section extends in a direction parallel to the second frame and adjacent to the first frame, the third radiating section One end is perpendicularly connected to the end of the second radiating segment away from the first radiating segment, and the other end extends in a direction parallel to the first radiating segment and adjacent to the third frame, the fourth One end of the radiant section is vertically connected to the third radiant section away from one end of the second radiant section, and the other end extends in a direction parallel to the second radiant section and adjacent to the first frame until near the first frame One end of the second slot is electrically connected. The antenna structure of claim 1, wherein the antenna structure further comprises a second switching circuit electrically connected to the grounding segment for adjusting the second frequency band. The antenna structure of claim 1, wherein the antenna structure further comprises a matching circuit electrically connected to the grounding segment for adjusting impedance matching of the second antenna. The antenna structure of claim 4, wherein the antenna structure further includes a third antenna and a fourth antenna, wherein the third antenna and the fourth antenna are opposite to the first antenna and the second antenna The structure of the third antenna is consistent with the structure of the first antenna, and the structure of the fourth antenna is consistent with the structure of the second antenna. The antenna structure of claim 7, wherein the first antenna is a main antenna and the third antenna is a diversity antenna. The antenna structure of claim 7, wherein the third antenna is a diversity antenna, the fourth antenna is a GPS antenna, and the third antenna and the fourth antenna are both electrically connected to a duplexer. In turn, the signal is separated. A wireless communication device comprising the antenna structure of any one of claims 1-9. The wireless communication device of claim 10, wherein the wireless communication device further comprises a substrate, the metal member is disposed around the substrate, and the substrate is provided with a first feeding point and a second feeding And a ground point, the first feed point is electrically connected to the feed portion, the second feed point is electrically connected to the radiator, and the ground point is electrically connected to the ground portion.