TWI640130B - Antenna structure and wireless communication device with same - Google Patents

Abstract

An antenna structure includes a housing, the housing is provided with a slot, a first slot and a break point, the slot includes a first end and a second end, and the first slot is opened in the housing Positioning the first end and penetrating the slot, the break point is formed in a portion of the housing corresponding to the first end and the second end, and is connected to the slot a portion of the housing that is enclosed by the slot, the first slot, and the breakpoint constitutes a radiating portion; a ground portion, one end of the ground portion is electrically connected to the radiating portion, and the other end is grounded; And a radiator, one end of the radiator is electrically connected to a feeding point, and the radiator is disposed in the casing and spaced apart from the radiation portion.

Description

Antenna structure and wireless communication device having the same

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

With the advancement of wireless communication technology, electronic devices such as mobile phones and personal digital assistants are constantly moving toward the trend of diversification, thinning, and faster and more efficient data transmission. However, the space for accommodating the antenna is also getting smaller and smaller, and with the continuous development of Long Term Evolution (LTE) technology, the bandwidth of the antenna is increasing. Therefore, how to design an antenna with a wider bandwidth in a limited space is an important issue in antenna design.

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

An antenna structure comprising: a casing, the casing is provided with a slot, a first slot and a break point, the slot includes a first end and a second end, and the first slot is opened in the housing corresponding to the first end Positioning and penetrating through the slot, the break point is formed in a portion of the housing corresponding to the first end and the second end, and penetrates with the slot, the housing is The portion surrounded by the slot, the first slot and the break point constitutes a radiating portion; a grounding portion, one end of the grounding portion is electrically connected to the radiating portion, and the other end is connected Land; a radiator, one end of the radiator being electrically connected to a feed point, the radiator being disposed in the housing and spaced apart from the radiation portion.

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

The antenna structure and the wireless communication device having the antenna structure divide the housing into corresponding radiation portions by using a slot, a first slot and a break point on the housing, and provide an additional radiator to make the radiator It is spaced apart from the radiation portion. In this way, the antenna structure is not limited by the clearance area and the distance to the ground, and the broadband design is effectively realized, and a better high frequency effect is maintained.

100‧‧‧Antenna structure

11‧‧‧Shell

111‧‧‧ front box

112‧‧‧ Backplane

113‧‧‧Border

114‧‧‧ accommodating space

115‧‧‧End

116‧‧‧First side

117‧‧‧ second side

118‧‧‧ slotting

119‧‧‧ first gap

120‧‧‧ second gap

121‧‧‧ Breakpoints

A1‧‧‧ Radiation Department

A2‧‧‧ Grounding section

T1‧‧‧ first end

T2‧‧‧ second end

13‧‧‧ Grounding Department

E1‧‧‧first radiation arm

E2‧‧‧second radiation arm

15‧‧‧ radiator

151‧‧‧First coupling section

153‧‧‧Second coupling section

155‧‧‧The third coupling section

157‧‧‧fourth coupling section

16‧‧‧Support

17‧‧‧First switching circuit

171‧‧‧First switching unit

173‧‧‧First switching element

18‧‧‧Second switching circuit

181‧‧‧Second switching unit

183‧‧‧Second switching element

200‧‧‧Wireless communication device

201‧‧‧Display unit

21‧‧‧Substrate

211‧‧‧Feeding point

213‧‧‧ Grounding point

214‧‧‧First electronic component

215‧‧‧Second electronic components

216‧‧‧ Third electronic component

217‧‧‧Fourth electronic components

203‧‧‧Flash

205, 206, 207‧‧‧ openings

1 is a schematic diagram of an antenna structure applied to a wireless communication device according to a 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 schematic view showing the assembly of the wireless communication device shown in FIG. 1.

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

Figure 5 is a circuit diagram of the antenna structure shown in Figure 1.

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

7 is a circuit diagram of a second switching circuit in the antenna structure shown in FIG. 1.

FIG. 8 is a graph of S parameters (scattering parameters) when the antenna structure shown in FIG. 1 operates in the 734-960 MHz frequency band.

Figure 9 is a graph showing the radiation efficiency of the antenna structure of Figure 1 operating in the 734-960 MHz band.

FIG. 10 is a graph of S parameters (scattering parameters) when the antenna structure shown in FIG. 1 operates in the 1710-2690 MHz frequency band.

Figure 11 is a graph showing the radiation efficiency of the antenna structure of Figure 1 operating in the 1710-2690 MHz band.

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, a preferred embodiment of the present invention provides an antenna structure 100 that can be applied to a wireless communication device 200 such as a mobile phone or a personal digital assistant to transmit and receive radio waves to transmit and exchange wireless signals.

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 feeding point 211 and a grounding point 213. The feed point 211 is used to feed current to the antenna structure 100. The grounding point 213 is spaced apart from the feeding point 211 to provide grounding for the antenna structure 100. The substrate At least one electronic component is also disposed on the 21 . In the embodiment, at least four electronic components, that is, the first electronic component 214, the second electronic component 215, the third electronic component 216, and the fourth electronic component 217 are disposed on the substrate 21. The first electronic component 214, the second electronic component 215, the third electronic component 216, and the fourth electronic component 217 are all disposed on the same side of the substrate 21 and are each designed to be metal-clad. In this embodiment, the first electronic component 214 is a front camera module disposed adjacent to the feed point 211. The second electronic component 215 and the third electronic component 216 are rear camera modules spaced apart from one side of the grounding point 213 away from the feeding point 211. The fourth electronic component 217 is an audio receiver module disposed between the first electronic component 214 and the second electronic component 215.

Referring to FIG. 2 together, the antenna structure 100 includes a housing 11 , a grounding portion 13 , and a radiator 15 . The housing 11 can be an outer casing of the wireless communication device 200. In the embodiment, the housing 11 is made of a metal material. The housing 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 an outer casing of the wireless communication device 200. An opening (not shown) is disposed on the front frame 111 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 to the opening, and the display plane is disposed substantially parallel to the backboard 112.

Referring to FIG. 3 together, the backboard 112 is disposed opposite to the front frame 111. The back plate 112 is an integrally formed single metal piece, except for the openings 205, 206, 207 provided for exposing the dual lens (for example, the second electronic component 215 and the third electronic component 216) and the flash 203 and the like. No slots, breaks, or breaks in the insulation for dividing the backing plate 112 are provided. The backing plate 112 corresponds to the ground of the antenna structure 100.

The frame 113 is disposed 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 to be opposite to the display unit 201, The front frame 111 and the back plate 112 together define an accommodation space 114. The accommodating space 114 is configured to receive electronic components or circuit modules of the circuit board, the processing unit, and the like of the wireless communication device 200.

The frame 113 includes at least a tip portion 115, a first side portion 116, and a second side portion 117. The end portion 115 can be the top or 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 is disposed opposite to the second side portion 117, and is disposed at two ends of the top portion 115, preferably 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.

A groove 118 is also formed in the frame 113. The front frame 111 is provided with a first slit 119, a second slit 120 and a break point 121. In the embodiment, the slots 118 are disposed on the end portion 115 and extend to the first side portion 116 and the second side portion 117 , respectively. It can be understood that in other embodiments, the slot 118 may be disposed only in the end portion 115 without extending to any one of the first side portion 116 and the second side portion 117, or A slot 118 is provided in the end portion 115 and extends only to one of the first side portion 116 and the second side portion 117.

The first slit 119, the second slit 120 and the break point 121 are all connected to the slot 118 and extend to block the front frame 111. In the embodiment, the first slot 119 is formed on the front frame 111 and communicates with the slot 118 at the first end T1 of the first side portion 116. The second slot 120 is defined in the front frame 111 and communicates with the slot 118 at the second end T2 of the second side portion 117. The break point 121 is disposed on the front frame 111 between the first end T1 and the second end T2, and is in communication with the slot 118. In this manner, the slot 118, the first slot 119, the second slot 120, and the break point 121 collectively separate the radiating portion A1 and the ground portion A2 that are spaced apart from each other from the housing 11. The front frame 111 of the casing 11 surrounded by the slot 118, the first slot 119 and the break point 121 constitutes the radiating portion A1. The housing The front frame 111 surrounded by the slot 118, the second slot 120, and the break point 121 in the eleventh portion constitutes the ground segment A2.

It can be understood that, in this embodiment, the slot 118 is formed in the frame 113 near one end of the back plate 112 and extends to the front frame 111 to make the radiating portion A1 and the ground segment A2 is completely constituted by a part of the front frame 111. Of course, in other embodiments, the opening position of the slot 118 can also be adjusted according to specific needs. For example, the slot 118 is opened at one end of the frame 113 near the back plate 112 and extends toward the front frame 111 such that the radiating portion A1 is partially covered by the front frame 111 and a portion thereof. The frame 113 is constructed.

It can be understood that, in this embodiment, the grounding segment A2 is grounded. Specifically, the grounding segment A2 may be grounded near the second slot 120 or near the breakpoint 121 (refer to FIG. 5).

Referring to FIG. 4 together, the grounding portion 13 has a substantially rectangular strip shape, one end of which is electrically connected to the radiating portion A1, and the other end of which is electrically connected to the grounding point 213, that is, grounded, to provide the radiating portion A1. Ground. In the embodiment, the grounding portion 13 divides the radiation portion A1 into two parts, that is, the first radiation arm E1 and the second radiation arm E2. Wherein, the front portion 111 of the front portion 111 of the ground portion 13 to the portion corresponding to one of the end points T1 of the slot 118 forms the first radiating arm E1. The other side of the ground portion 13 is formed by the front frame 111 until it extends to a portion corresponding to the break point 121 to form the second radiating arm E2. In this embodiment, the position of the grounding portion 13 does not correspond to the middle of the radiating portion A1, so the length of the first radiating arm E1 is greater than the length of the second radiating arm E2. In addition, the slot 118, the first slot 119, the second slot 120, and the break point 121 are filled with an insulating material (for example, plastic, rubber, glass, wood, ceramic, etc., but not limited thereto), and further The radiation portion A1, the grounding portion A2 and the remaining portion of the casing 11 are separated.

The radiator 15 is disposed in the accommodating space 114, and the radiation portion A1 Interval setting. In this embodiment, the radiator 15 is a monopole antenna. The radiator 15 includes a first coupling section 151, a second coupling section 153, a third coupling section 155, and a fourth coupling section 157. The first coupling segment 151, the second coupling segment 153, the third coupling segment 155, and the fourth coupling segment 157 are disposed in a coplanar manner and are disposed together in a plane perpendicular to the substrate 21. The first coupling section 151 has a substantially rectangular strip shape, one end of which is electrically connected to the feeding point 211, and the other end of which extends in a direction parallel to the end portion 115 and adjacent to the first side portion 116. The second coupling section 153 has a substantially rectangular strip shape, and one end thereof is perpendicularly connected to one end of the first coupling section 151 away from the feeding point 211, and extends in a direction perpendicular and away from the substrate 21, thereby The first coupling section 151 constitutes a substantially "L" shaped structure.

The third coupling section 155 has a substantially rectangular strip shape, one end of which is perpendicularly connected to the second coupling section 153 away from one end of the first coupling section 151, and is parallel to the first coupling section 151 and close to the second The direction of the side portion 117 extends until the feed point 211 is crossed. The fourth coupling section 157 has a substantially rectangular strip shape, one end of which is perpendicularly connected to the junction of the second coupling section 153 and the third coupling section 155, and is parallel to the first coupling section 151 and close to the first The direction of the one side portion 116 extends until it passes over the ground portion 13. In this embodiment, the fourth coupling section 157 and the third coupling section 155 are on the same straight line, and the fourth coupling section 157, the third coupling section 155 and the second coupling section 153 are common. Form a "T" structure. The length of the fourth coupling segment 157 is greater than the length of the third coupling segment 155. The length of the third coupling section 155 is greater than the length of the first coupling section 151. The length of the first coupling segment 151 is greater than the length of the second coupling segment 153.

It can be understood that, in this embodiment, the distance between the radiation portion A1 and the back plate 112 is 5.13 mm. The widths of the first slit 119, the second slit 120, and the break point 121 are both 2 mm. The distance from the first electronic component 214 to the radiation portion A1 is 2.7 mm. The length of the first radiating arm E1 is 44 mm. The length of the second radiating arm E2 is 21.5 mm. The third coupling section 155 And the overall length of the fourth coupling section 157 is 20.2 mm. The distance between the fourth coupling section 157 and the grounding portion 13 is 0.7 mm. The distance between the fourth coupling section 157 and the radiation portion A1 is 1.7 mm.

It can be understood that in other embodiments, the antenna structure 100 can further include a support portion 16 . The support portion 16 has a substantially rectangular block shape and is disposed non-coplanar with the substrate 21. Preferably, the support portion 16 is disposed in a plane perpendicular to the substrate 21. The radiator 15 is integrally disposed on the surface of the support portion 16 facing the radiation portion A1, and is spaced apart from the radiation portion A1.

It can be understood that when a current is fed from the feed point 211, a current will flow through the radiator 15 and be coupled to the radiation portion A1, thereby exciting the radiator 15 and the second radiation arm E2. A first mode is obtained and the radiator 15 and the first radiating arm E1 are excited to a second mode. In this embodiment, the first mode is a high frequency mode, and the frequency ranges from 1710 to 2690 MHz. The second mode is a low frequency mode having a frequency range of 734-960 MHz.

Referring to FIG. 5 , the antenna structure 100 further includes a first switching circuit 17 and a second switching circuit 19 . One end of the first switching circuit 17 is electrically connected to the feed point 211. The other end of the first switching circuit 17 is electrically connected to the first coupling section 151 to be electrically connected to the radiator 15 by the first coupling section 151. One end of the second switching circuit 19 is electrically connected to the ground portion 13 to be electrically connected to the radiation portion A1 by the ground portion 13. The other end of the second switching circuit 19 is electrically connected to the grounding point 213, that is, grounded. Thus, by controlling the switching between the first switching circuit 17 and the second switching circuit 19, the frequency band of the antenna structure 100 can be effectively adjusted. The adjustment band described in the item is to shift the band to a low frequency or to a high frequency.

For details, please refer to FIG. 6 , the first switching circuit 17 includes a first switching unit 171 and at least one first switching element 173 . The first switching unit 171 is electrically connected to the first Coupling section 151. The first switching element 173 can be an inductor, a capacitor, or a combination of an inductor and a capacitor. The first switching elements 173 are connected in parallel with each other, and one end thereof is electrically connected to the first switching unit 171, and the other end is electrically connected to the feeding point 211. Thus, by controlling the switching of the first switching unit 171, the radiator 15 can be switched to a different first switching element 173.

Referring to FIG. 7 , the second switching circuit 19 includes a second switching unit 191 and at least one second switching element 193 . The second switching unit 191 is electrically connected to the ground portion 13 . The second switching element 193 can be an inductor, a capacitor, or a combination of an inductor and a capacitor. The second switching elements 193 are connected in parallel with each other, and one end thereof is electrically connected to the second switching unit 191, and the other end is electrically connected to the grounding point 213. Thus, by controlling the switching of the second switching unit 191, the radiation portion A1 can be switched to a different second switching element 193.

It can be understood that, since each of the first switching element 173 and the second switching element 193 has different impedances, the antenna structure 100 can be effectively adjusted by switching between the first switching unit 171 and the second switching unit 191. Frequency band.

Specifically, please refer to Table 1 together. In one embodiment, the first switching circuit 17 includes four first switching elements 173, which are an inductor of 4.7 nH, a capacitance of 3 pF, a capacitance of 1.1 pF, and an inductance of 56 nH. The second switching circuit 19 includes seven second switching elements 193, which are 12nH inductance, 10nH inductance, 6.4nH inductance, 5.1nH inductance, short circuit (zero impedance), 2pF capacitance and 0.65pF capacitance. .

When the first switching unit 171 is switched to an inductance having an inductance value of 4.7 nH, and the second switching unit 191 is switched to an inductance having an inductance value of 12 nH, the antenna structure 100 can operate in the 734-756 MHz band. . When the first switching unit 171 is switched to an inductance with an inductance value of 4.7 nH, and the second switching unit 191 is switched to an inductance with a sense value of 10 nH, the antenna structure 100 can operate in the 758-803 MHz frequency band. . When the first switching unit 171 is switched to an inductance having an inductance value of 4.7 nH, and the second switching unit 191 is switched to an inductance value. The antenna structure 100 can operate in the 869-894 MHz band when the inductance is 6.4 nH. When the first switching unit 171 is switched to an inductance having an inductance value of 4.7 nH, and the second switching unit 191 is switched to an inductance having an inductance value of 5.1 nH, the antenna structure 100 can operate at 925-960 MHz. Frequency band. When the first switching unit 171 is switched to a capacitance with a capacitance value of 3 pF and the second switching unit 191 is switched to a short circuit, the antenna structure 100 can operate in the 1710-2170 MHz frequency band. When the first switching unit 171 is switched to a capacitance with a capacitance value of 1.1 pF, and the second switching unit 191 is switched to a capacitance with a capacitance value of 2 pF, the antenna structure 100 can operate in the frequency band of 2300-2400 MHz. . When the first switching unit 171 is switched to an inductance having an inductance value of 56 nH, and the second switching unit 191 is switched to a capacitance having a capacitance value of 0.65 pF, the antenna structure 100 can operate in the frequency band of 2500-2690 MHz. .

8 is a graph of S-parameters (scattering parameters) when the antenna structure 100 operates in the 734-960 MHz band (ie, the second mode). The curve S81 is the S11 value when the antenna structure 100 operates in the LTE Band 17 band (734-756 MHz). Curve S82 is the S11 value when the antenna structure 100 operates in the LTE Band 28 band (758-803 MHz). Curve S83 is the S11 value when the antenna structure 100 operates in the LTE Band 5 band (869-894 MHz). Curve S84 is the S11 value when the antenna structure 100 operates in the LTE Band 8 band (925-960 MHz). Obviously, the curve S81-S84 correspond to the four low frequency bands of the above four rows in Table 1.

FIG. 9 is a graph showing the radiation efficiency of the antenna structure 100 when operating in a low frequency mode. The curve S91 is the radiation efficiency when the antenna structure 100 operates in the LTE Band 17 frequency band (734-756 MHz). Curve S92 is the radiation efficiency of the antenna structure 100 when operating in the LTE Band 28 band (758-803 MHz). Curve S93 is the radiation efficiency of the antenna structure 100 when operating in the LTE Band 5 band (869-894 MHz). Curve S94 is the radiation efficiency of the antenna structure 100 when operating in the LTE Band 8 band (925-926 MHz). Obviously, the curves S91-S94 correspond to the four low frequency bands of the above four rows of Table 1.

FIG. 10 is a graph of S parameters (scattering parameters) when the antenna structure 100 operates in the 1710-2690 MHz frequency band (ie, the first mode). Figure 11 is a graph showing the radiation efficiency of the antenna structure 100 when operating in the 1710-2690 MHz band (i.e., the first mode).

Obviously, as can be seen from FIG. 8 to FIG. 11, the antenna structure 100 can operate in corresponding low frequency bands, such as LTE Band 17 (734-756 MHz), LTE Band 28 (758-803 MHz), and LTE Band 5 (869). -894MHz), LTE Band 8 band (925-960MHz). In addition, the antenna structure 100 can also operate in the 1710-2690MHz frequency band, that is, cover LTE low, medium, and high frequency, and has a wide frequency range, and when the antenna structure 100 operates in the above frequency band, its operating frequency can be satisfied. Antenna work design requirements and better radiation efficiency.

Obviously, the antenna structure 100 divides the housing 11 into corresponding ones by providing the housing 11 and utilizing the slot 118, the first slot 119, the second slot 120 and the break point 121 on the housing 11. The radiating portion A1 and the grounding portion A2 are provided with an additional radiator 15 such that the radiator 15 is spaced apart from the radiating portion A1. In this way, the antenna structure 100 is not limited by the clearance area and the distance to the ground, and the broadband design is effectively realized, and a better high frequency effect is maintained. In addition, the slot 118, the first slot 119, the second slot 120, and the break point 121 on the housing 11 The backplanes 112 are not disposed on the backplane 112, so that the backplanes 112 form an all-metal structure, that is, the backplanes 112 are not insulated and slotted. The line or breakpoint allows the backing plate 112 to avoid affecting the integrity and aesthetics of the backing plate 112 due to the provision of slots, breaks, or breakpoints.

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 (12)

An antenna structure includes: a housing having a slot, a first slot and a break point, wherein the slot includes a first end and a second end, the first slot is defined in the housing Corresponding to the position of the first end, and penetrates with the slot, the break point is opened in a portion of the housing corresponding to the first end and the second end, and penetrates with the slot a portion of the housing that is enclosed by the slot, the first slot, and the breakpoint constitutes a radiating portion, wherein the housing includes a front frame, a back plate, and a frame, and the frame is sandwiched between Between the front frame and the back plate, the front frame is disposed around the periphery of the frame, the slot is opened in the frame, and the first slot and the break point are both open in the front Blocking and blocking the front frame; a grounding portion, one end of the grounding portion is electrically connected to the radiating portion, and the other end is grounded; and a radiator, one end of the radiating body is electrically connected to a feeding point, The radiator is disposed in the housing and spaced apart from the radiation portion. The antenna structure according to claim 1, wherein the slot, the first slot and the break point are filled with an insulating material. The antenna structure of claim 1, wherein the backing plate is a single metal piece integrally formed, and the backing plate is not provided with any slotting or breaking for separating the insulation of the backing plate. Or breakpoints. The antenna structure of claim 1, wherein the housing is further provided with a second slot, and the second slot is opened at a position corresponding to the second end of the housing, and A portion of the casing that is enclosed by the slot, the second slot, and the breakpoint constitutes a grounding portion, and the grounding segment is grounded. The antenna structure according to claim 1, wherein the grounding portion divides the radiating portion into a first radiating arm and a second radiating arm, and the radiating portion on one side of the ground portion extends until it extends to a portion corresponding to the first end of the slot together to form the first radiating arm, the radiating portion on the other side of the ground portion extending to a portion corresponding to the breakpoint to form the a second radiating arm, the length of the first radiating arm being greater than the length of the second radiating arm. The antenna structure of claim 1, wherein the radiator comprises a first coupling section, a second coupling section, a third coupling section and a fourth coupling section, and one end of the first coupling section is electrically connected to the a feeding point, one end of the second coupling section is perpendicularly connected to the first coupling section away from one end of the feeding point, to form an "L"-shaped structure with the first coupling section, the third One end of the coupling section is vertically connected to the second coupling section away from one end of the first coupling section, and extends in a direction parallel to the first coupling section until the feeding point is crossed, and the fourth coupling section is one end Vertically connected to the junction of the second coupling segment and the third coupling segment, and extending in a direction parallel to the first coupling segment and away from the third coupling segment until crossing the ground portion. The antenna structure of claim 6, wherein the length of the fourth coupling section is greater than the length of the third coupling section, and the length of the third coupling section is greater than the length of the first coupling section, The length of the first coupling segment is greater than the length of the second coupling segment. The antenna structure of claim 1, wherein the antenna structure further includes a first switching circuit and a second switching circuit, and one end of the first switching circuit is electrically connected to the a feeding point, the other end of the first switching circuit is electrically connected to the radiator, and one end of the second switching circuit is electrically connected to the radiating portion by the grounding portion, the second switching circuit The other end is grounded, and the frequency band of the antenna structure is adjusted by controlling switching between the first switching circuit and the second switching circuit. The antenna structure of claim 8, wherein the first switching circuit comprises a first switching unit and at least one first switching element, the first switching unit being electrically connected to the radiator, the A switching element is connected in parallel with each other, and one end thereof is electrically connected to the first switching unit, and the other end is electrically connected to the feeding point. The antenna structure of claim 8, wherein the second switching circuit comprises a second switching unit and at least one second switching element, the second switching unit being electrically connected to the grounding portion, the The two switching elements are connected in parallel with each other, and one end thereof is electrically connected to the second switching unit, and the other end is grounded. The antenna structure of claim 1, wherein the antenna structure further includes a support portion, the support portion is spaced apart from the radiation portion, and the radiator is integrally disposed at the support portion toward the radiation The surface of the portion is spaced apart from the radiation portion. A wireless communication device comprising the antenna structure according to any one of claims 1-11.