CN112290196B - Antenna structure - Google Patents

Abstract

The invention discloses an antenna structure. The antenna structure includes: a first radiating element, a second radiating element and a feed-in element; the first radiating element includes a first radiating part, a second radiating part and a coupling between the first radiating part and the a feed-in portion between the second radiating portions; the second radiating element includes a third radiating portion, a fourth radiating portion, and a ground portion coupled between the third radiating portion and the fourth radiating portion, Wherein, the third radiating part and the first radiating part are separated from and coupled to each other, the third radiating part and the second radiating part are separated from and coupled to each other, and the fourth radiating part is separated from the first radiating part and coupled with each other; the feed-in part is coupled between the feed-in part and the ground part. The present invention can provide the operating frequency band applied by the fifth-generation mobile communication technology through the technical solution of "the fourth radiating part and the first radiating part are separated from each other and coupled with each other".

Description

antenna structure

technical field

The present invention relates to an antenna structure, in particular to an antenna structure with an operating frequency band applied by the fourth-generation mobile communication technology and the fifth-generation mobile communication technology.

Background technique

With the development of the fifth generation mobile communication technology (5th Generation Mobile Networks, 5G), the design of the existing antenna structure has been unable to meet the operating frequency band of the fifth generation communication system. Generally speaking, in order to further support the 5G operating frequency band, the existing products add an additional antenna that supports the 5G operating frequency band. 5G antenna.

Therefore, in view of this, how to overcome the above-mentioned defects by improving the design of the antenna structure has become one of the important issues to be solved by this project.

Therefore, it is necessary to provide an antenna structure to solve the above problems.

Contents of the invention

The technical problem to be solved by the present invention is to provide an antenna structure with an operating frequency band applied by the fourth generation mobile communication technology and the fifth generation mobile communication technology in view of the deficiencies of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide an antenna structure, which includes: a first radiating element, a second radiating element, and a feed-in element; the first radiating element The element includes a first radiating part, a second radiating part, and a feed-in part coupled between the first radiating part and the second radiating part; the second radiating part includes a third radiating part, a fourth a radiating part and a ground part coupled between the third radiating part and the fourth radiating part, wherein the third radiating part and the first radiating part are separated from and coupled to each other, and the third radiating part and the fourth radiating part are coupled to each other. The second radiating part is separated from and coupled to each other, and the fourth radiating part and the first radiating part are separated from and coupled to each other; the feed-in part is coupled between the feed-in part and the ground part.

One of the beneficial effects of the present invention is that the antenna structure provided by the present invention can provide the fifth-generation mobile communication technology through the technical solution of "the fourth radiating part and the first radiating part are separated from each other and coupled with each other". The operating frequency band to which it applies.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the provided drawings are only for reference and description, and are not intended to limit the present invention.

Description of drawings

FIG. 1 is a schematic top view of an antenna structure according to a first embodiment of the present invention.

FIG. 2 is a schematic top view of an antenna structure according to a second embodiment of the present invention.

FIG. 3 is a schematic top view of an antenna structure according to a third embodiment of the present invention.

FIG. 4 is a schematic top view of an antenna structure according to a fourth embodiment of the present invention.

FIG. 5 is a graph of VSWR of the antenna structure of FIG. 4 at different frequencies.

FIG. 6 is a schematic top view of an antenna structure according to a fifth embodiment of the present invention.

FIG. 7 is another schematic top view of the antenna structure according to the fifth embodiment of the present invention.

Description of main component symbols:

U Antenna Structure 221 Hypotenuse

S Substrate 23 Grounding part

1 first radiating element 230 edge

11 The first radiation part 3 3 Feed-in parts

111 The first body 31 Feed-in terminal

112 First protrusion 32 Ground terminal

113 First tank body 4 4 Grounding piece

12 Second Radiant Part 40 Edge

121 first radiator 5 bridge piece

122 Second Radiator F Feed In

123 Third radiator C Surrounding area

1231 The first section L1 The first scheduled distance

1232 Second section L2 Second predetermined distance

13 Feed-in part W1 The first predetermined width

131 Hypotenuse W2 Second predetermined width

2 Second Radiator W3 Third Predetermined Width

21 The third radiation part W4 The fourth predetermined width

211 Second Body W5 Fifth Scheduled Width

212 The second protrusion G1 The first predetermined distance

213 The second tank body G2 The second predetermined distance

214 Connector P Predetermined length

22 Fourth Radiant T Groove

220 Edge X, Y Direction

M1, M2, M3, M4, M5, M6, M7, M8, M9, M10 Nodes

Detailed ways

The following is an illustration of the implementation of the "antenna structure" disclosed in the present invention through specific specific examples. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple illustration, and are not drawn according to the actual size, which is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first", "second" and "third" may be used herein to describe various elements, these elements should not be limited by these terms. These terms are mainly used to distinguish one element from another. In addition, the term "or" used herein may include any one or a combination of more of the associated listed items depending on the actual situation.

[first embodiment]

First, please refer to FIG. 1 , which is a schematic top view of an antenna structure according to a first embodiment of the present invention. The first embodiment of the present invention provides an antenna structure U, which includes: a first radiating element 1 , a second radiating element 2 and a feeding element 3 . In addition, the antenna structure U may further include a substrate S, the first radiating element 1 and the second radiating element 2 may be disposed on the substrate S, and the feeding element 3 may be coupled to the first radiating element 1 and the second radiating element 2 between. For example, the first radiating element 1 and the second radiating element 2 can be a metal sheet, a metal wire or other conductors with conductive effect, and the feed-in element 3 can be a coaxial cable (Coaxial cable), however The present invention is not limited thereto. In addition, the feeding element 3 can have a feeding end 31 and a grounding end 32 , the feeding end 31 can be coupled to the first radiating element 1 , and the grounding end 32 can be coupled to the second radiating element 2 . In addition, it should be specially noted that the coupling in the whole of the present invention may be a direct connection or an indirect connection, or a direct electrical connection or an indirect electrical connection, and the present invention is not limited thereto. In addition, it should be noted that the coupling in the context of the present invention means that there is no physical connection between two elements, but that the electric field energy generated by the current of one element excites the electric field energy of the other element.

Based on the above, the antenna structure U may further include a ground element 4 , and the ground element 4 may be coupled to the second radiation element 2 . In addition, in a preferred embodiment, the antenna structure U may further include a bridge member 5 , and the bridge member 5 may be coupled between the second radiation member 2 and the ground member 4 . It is worth noting that the bridging piece 5 is provided for the purpose of making the grounding piece 4 and the second radiating piece 2 easily connected to each other. Although it is stated in the embodiment of FIG. 1 that the bridging piece 5 can be further provided, however, in other implementation , and the bridging piece 5 may not be provided. In addition, it is worth mentioning that, for example, the bridge member 5 can be made of tin or other conductive materials, and the ground member 4 can be made of copper or other conductive materials, but the present invention is not limited thereto.

Next, the first radiating element 1 may include a first radiating portion 11 , a second radiating portion 12 and a feed-in portion 13 coupled between the first radiating portion 11 and the second radiating portion 12 . The second radiating element 2 may include a third radiating portion 21 , a fourth radiating portion 22 and a ground portion 23 coupled between the third radiating portion 21 and the fourth radiating portion 22 . The feed-in part 3 can be coupled between the feed-in part 13 and the ground part 23, and the feed-in end 31 of the feed-in part 3 can be coupled to the feed-in part 13, and the ground end 32 of the feed-in part 3 can be coupled to the ground part 23 on. In addition, the grounding element 4 can be coupled to the grounding portion 23 of the second radiating element 2 , preferably, the grounding element 4 and the grounding portion 23 can be connected to each other by using the bridging element 5 .

Based on the above, the first radiating portion 11 may extend toward a first direction (positive X direction) relative to the feeding portion 13, and the second radiating portion 12 may extend toward a second direction (negative X direction) relative to the feeding portion 13, That is to say, the first radiating part 11 can be arranged on one side (such as but not limited to the right side) of the feeding part 13, and the second radiating part 12 can be arranged on the other side (such as but not limited to the left side) of the feeding part 13. ), but the present invention is not limited thereto. In addition, the third radiating part 21 , the grounding part 23 and the fourth radiating part 22 can form a surrounding area C, and the first radiating element 1 is disposed in the surrounding area C. For example, the surrounding area C may be similar to a "C" shape, and the space in the "C" shape may surround three sides of the first radiating element 1 , but the present invention is not limited thereto.

Next, the second radiating part 12 may include a first radiating body 121 coupled to the feed-in part 13, a second radiating body 122 coupled to the first radiating body 121 and set at a turning point relative to the first radiating body 121, and A third radiator 123 coupled to the second radiator 122 and set at a turning point relative to the second radiator 122 . The first radiating portion 11 can extend toward a first direction (positive X direction) relative to the feeding portion 13 . In addition, the first radiator 121 of the second radiating part 12 can extend toward a second direction (negative X direction) relative to the feeding part 13 , and the second radiator 122 of the second radiating part 12 can extend relative to the first radiator 121 Extending toward a third direction (positive Y direction), the third radiator 123 of the second radiator 12 may extend toward a first direction (positive X direction) relative to the second radiator 122 . In addition, the fourth radiation portion 22 can be coupled to the ground portion 23 and extend toward the first direction (positive X direction) relative to the feeding portion 13 . According to the present invention, the first direction, the second direction and the third direction can be different from each other, that is, the first direction and the second direction can be opposite to each other, the first direction and the third direction can be perpendicular to each other, and The second direction and the third direction are perpendicular to each other.

Next, the connection between the feeding end 31 of the feeding part 3 and the feeding part 13 can be defined as a feeding part F, and there can be a first predetermined distance between the feeding part F and an edge 230 of the ground part 23 L1, there may be a second predetermined distance L2 between the feeding point F and an edge 220 of the fourth radiating portion 22, and the second predetermined distance L2 is greater than the first predetermined distance L1. In other words, the first predetermined distance L1 and the second predetermined distance L2 are distances measured in the direction of the first direction (positive X direction) with the feed-in point F as a reference. Further, in one embodiment, a groove T can be formed at the connection between the fourth radiating portion 22 and the grounding portion 23, and there is a difference between the fourth radiating portion 22 and the grounding portion 23, that is, There is a level difference between the fourth radiating portion 22 and the grounding portion 23 in the third direction (positive Y direction). In addition, it is worth noting that, in other embodiments, there may be a first predetermined distance L1 between the feed-in point F and an edge 40 of the ground member 4, and the feed-in point F to an edge 220 of the fourth radiating portion 22 There may be a second predetermined distance L2 between them, and the second predetermined distance L2 may be greater than the first predetermined distance L1.

Next, please refer to FIG. 1 again. According to the present invention, the third radiating portion 21 and the first radiating portion 11 can be separated from each other and coupled to each other, and the third radiating portion 21 and the second radiating portion 12 can be separated from each other and coupled to each other. To generate an operating band with a frequency range between 698MHz and 960MHz. In addition, the first radiating part 11 can generate an operating frequency band with a frequency range between 1450 MHz and 2300 MHz. In addition, the second radiating part 12 can generate an operating frequency band with a frequency range between 2300 MHz and 2700 MHz. In addition, the fourth radiating part 22 and the first radiating part 11 can be separated from each other and coupled with each other to generate an operating frequency band with a frequency ranging from 3300 MHz to 3800 MHz. Furthermore, the first radiating part 11 can also use frequency doubling to generate an operating frequency band between 5100MHz and 5850MHz. In addition, the second radiating part 12 and the third radiating part 21 are separated from each other and coupled with each other. In the case of , frequency doubling can also be used to generate an operating frequency band between 4600MHz and 5400MHz.

[Second embodiment]

First, please refer to FIG. 2, which is a schematic top view of the antenna structure of the second embodiment of the present invention. From the comparison between FIG. 2 and FIG. 1, it can be seen that the biggest difference between the second embodiment and the first embodiment is that By adjusting the structure of the first radiator 1 of the antenna structure U provided by the second embodiment, the overall performance of the antenna structure U is further improved. In addition, it should be noted that other structural features shown in the second embodiment are similar to those described in the foregoing embodiments, and will not be repeated here. In addition, for the sake of simplicity of the drawings, the grounding element 4 and the bridging element 5 are omitted.

Based on the above, the first radiator 121 can have a first predetermined width W1, the second radiator 122 can have a second predetermined width W2, the third radiator 123 can have a third predetermined width W3, and the second predetermined width W2 It may be larger than the third predetermined width W3, and the third predetermined width W3 may be larger than the first predetermined width W1. In addition, the feeding portion 13 may have a fourth predetermined width W4, and the fourth predetermined width W4 may be greater than the first predetermined width W1. Thereby, compared with the first predetermined width W1 of the first radiator 121 in the first embodiment, the second predetermined width W2 of the second radiator 122 and the third predetermined width W3 of the third radiator 123 are the same as each other In this case, the antenna structure U provided by the second embodiment can increase the bandwidth of the operating frequency band generated by the antenna structure U in the frequency range between 4600 MHz and 5400 MHz, and improve the radiation performance. Furthermore, in terms of the first embodiment, among the operating frequency bands generated by the antenna structure U between 4600 MHz and 5400 MHz, only the operating frequency band between 4600 MHz and 4800 MHz has better radiation performance. However, Taking the second embodiment as an example, the operating frequency band generated by the antenna structure U within the frequency range between 4600 MHz and 5400 MHz has better radiation performance.

[Third embodiment]

First, please refer to FIG. 3 , which is a schematic top view of an antenna structure according to a third embodiment of the present invention. From the comparison of Fig. 3 and Fig. 2, it can be seen that the biggest difference between the third embodiment and the second embodiment is that the structure of the first radiating element 1 of the antenna structure U provided by the third embodiment can be adjusted to further improve the The overall performance of the antenna structure U. In addition, it should be noted that other structural features shown in the third embodiment are similar to those described in the foregoing embodiments, and will not be repeated here.

Based on the above, the first radiating part 11 may include a first body 111 coupled to the feed-in part 13 , a first protruding body 112 coupled to the first body 111 and protruding toward the direction of the third radiating part 21 , and A first groove 113 is recessed relative to the first body 111 . In addition, the first body 111 of the first radiating part 11 can extend toward a first direction (positive X direction) relative to the feed-in part 13, the first protrusion 112 can extend toward a third direction (positive Y direction), and The first groove body 113 can be concave toward a third direction (positive Y direction). Further, in the first direction, the distance between the first protruding body 112 and the feeding point F is smaller than the distance between the first groove body 113 and the feeding point F, that is to say, the first protruding body 112 is closer to the feed-in position F than the first tank body 113 . In addition, the center frequency of the operating frequency band generated by the first radiating part 11 with a frequency range between 5100MHz and 5850MHz can be adjusted by setting the first protruding body 112, thereby, compared with the antenna in the second embodiment When the structure U is not provided with the first protruding body 112 , the antenna structure U provided by the third embodiment can lower the center frequency of the operating frequency band whose frequency range is between 5100 MHz and 5850 MHz. In addition, the bandwidth of the operating frequency band with a frequency range between 1450 MHz and 2300 MHz and the bandwidth of the operating frequency band with a frequency range between 5100 MHz and 5850 MHz can be adjusted by setting the first slot body 113 .

Based on the above, the feeding portion 13 may have an oblique side 131 , and the fourth radiating portion 22 may have an oblique side 221 , the oblique side 131 of the feeding portion 13 and the oblique side 221 of the fourth radiating portion 22 are opposite to each other and parallel to each other. In addition, by setting the hypotenuse 131 of the feeding part 13 , the center frequency of the operating frequency band with a frequency range between 1450 MHz and 2300 MHz can be adjusted, and the bandwidth of the operating frequency band with a frequency range between 3300 MHz and 3800 MHz can be adjusted.

[Fourth embodiment]

First, please refer to FIG. 4 , which is a schematic top view of an antenna structure according to a fourth embodiment of the present invention. From the comparison of Fig. 4 and Fig. 3, it can be seen that the biggest difference between the fourth embodiment and the third embodiment is that due to the space limitation of the installation position of some antenna structures U, the periphery of the antenna structure U of the fourth embodiment is The structure can be adjusted in response to space constraints, so as to improve the overall performance of the antenna structure U. In addition, it should be noted that other structural features shown in the fourth embodiment are similar to those described in the foregoing embodiments, and will not be repeated here.

Based on the above, the third radiating part 21 of the antenna structure U provided in the fourth embodiment may include a second body 211, a connecting body 214 connected between the second body 211 and the ground part 23, and a connecting body 214 coupled to the second body 211. There are two main bodies 211 , a second protruding body 212 protruding toward the direction of the second radiation portion 12 , and a second groove 213 recessed relative to the second main body 211 and corresponding to the second protruding body 212 . In addition, the position of the second protrusion 212 can be set corresponding to the second groove 213, the second protrusion 212 can extend toward a fourth direction (negative Y direction), and the second groove 213 can extend toward a fourth direction. direction (negative Y direction) is concave. In addition, it should be noted that since the second protruding body 212 further extends toward the direction of the second radiation part 12 relative to the second body 211, the shape of the third radiation body 123 of the second radiation part 12 must also be Adjust accordingly. Further, the third radiator 123 may include a first section 1231 connected to the second radiator 122 and a second section 1232 connected to the first section 1231 . The first section 1231 may have a third predetermined width W3, the second section 1232 may have a fifth predetermined width W5, and the third predetermined width W3 is greater than the fifth predetermined width W5. Furthermore, the second predetermined width W2 may be greater than the third predetermined width W3, and the second predetermined width W2 is greater than the fifth predetermined width W5.

Next, please refer to FIG. 4 again, and please also refer to FIG. 5 and Table 1 below. FIG. 5 is a graph of the voltage standing wave ratio (Voltage standing wave ratio, VSWR) of the antenna structure in FIG. 4 at different frequencies. .

Table 1

node Frequency (MHz) VSWR M1 617 3.3002 M2 704 1.7430 M3 894 1.4855 M4 960 2.2632 M5 1710 1.4721 M6 1575 1.8710 M7 2100 1.5380 M8 2700 1.4722 M9 3500 1.2145 M10 5100 1.3314

[Fifth Embodiment]

First, please refer to FIG. 6 and FIG. 7 . FIG. 6 and FIG. 7 are schematic top views of an antenna structure according to a fifth embodiment of the present invention. From the comparison of Figure 6 and Figure 4 and the comparison of Figure 7 and Figure 4, it can be seen that the biggest difference between the fifth embodiment and the fourth embodiment is that the fourth radiating part of the antenna structure U provided by the fifth embodiment can be adjusted 22 structure, and further improve the overall performance of the antenna structure U. In addition, it should be noted that other structural features shown in the fifth embodiment are similar to those described in the foregoing embodiments, and will not be repeated here.

Based on the above, please refer to FIG. 6 again, the fourth radiating portion 22 may have a predetermined length P between 11.5 millimeters (mm) and 13 millimeters, so as to adjust the frequency range of the operating frequency band between 3300MHz and 3800MHz. center frequency, but the present invention is not limited thereto. In addition, there is a first predetermined distance G1 between 1 mm and 2 mm in a first direction (positive X direction) between the fourth radiating portion 22 and the feeding portion 13 .

Based on the above, please refer to FIG. 7 again, there is a second predetermined distance G2 between 0.5 mm and 3.5 mm in a third direction (positive Y direction) between the first radiating portion 11 and the fourth radiating portion 22, preferably , the second predetermined distance G2 may be between 1 millimeter and 3.5 millimeters, but the present invention is not limited thereto. In other words, the distance of the second predetermined gap G2 can be changed by adjusting the width of the fourth radiation portion 22 .

[Advantageous Effects of Embodiment]

One of the beneficial effects of the present invention is that the antenna structure U provided by the present invention can provide fifth-generation mobile communication through the technical solution of "the fourth radiating part 22 and the first radiating part 11 are separated from each other and coupled with each other". The frequency band of operation in which the technology applies.

Furthermore, the antenna structure U provided by the present invention can utilize a feed-in element 3 to generate 4G LTE (LongTerm Evolution) with a frequency range between 698MHz and 960MHz and a frequency range between 1450MHz and 2300MHz And the operating frequency band with a frequency range between 2300MHz and 2700MHz. In addition, it can also generate an operating frequency band with a frequency range between 5100MHz and 5850MHz for 5G LAA (Licensed Assisted Access). The operating frequency band in the Sub 6GHz operating frequency range is between 3300MHz and 3800MHz. In this way, under the framework of the same antenna structure U, the operating frequency bands applied by the fourth generation mobile communication technology and the fifth generation mobile communication technology can be realized.

The content disclosed above is only a preferred feasible embodiment of the present invention, and does not therefore limit the claims of the present invention. Therefore, all equivalent technical changes made by using the description of the present invention and the contents of the accompanying drawings are included in the claims of the present invention. Book.

Claims (13)

1. An antenna structure, the antenna structure comprising:

the first radiating piece comprises a first radiating part, a second radiating part and a feed-in part coupled between the first radiating part and the second radiating part;

the second radiating element comprises a third radiating part, a fourth radiating part and a grounding part coupled between the third radiating part and the fourth radiating part, wherein the third radiating part and the first radiating part are separated from each other and are mutually coupled, the third radiating part and the second radiating part are separated from each other and are mutually coupled, and the fourth radiating part and the first radiating part are separated from each other and are mutually coupled; and

the feed-in piece is coupled between the feed-in part and the grounding part;

the second radiating part comprises a first radiating body coupled to the feed-in part, a second radiating body coupled to the first radiating body and arranged in a turning way relative to the first radiating body, and a third radiating body coupled to the second radiating body and arranged in a turning way relative to the second radiating body; the first radiator has a first predetermined width, the second radiator has a second predetermined width, the third radiator has a third predetermined width, the second predetermined width is larger than the third predetermined width, and the third predetermined width is larger than the first predetermined width.

2. The antenna structure of claim 1, wherein the third radiating portion, the ground portion and the fourth radiating portion form a surrounding area, and the first radiating member is disposed in the surrounding area.

3. The antenna structure of claim 1, wherein the connection between the feeding element and the feeding element is a feeding element, a first predetermined distance is provided between the feeding element and an edge of the grounding element, and a second predetermined distance is provided between the feeding element and an edge of the fourth radiating element, the second predetermined distance being greater than the first predetermined distance.

4. The antenna structure of claim 1, wherein the first radiating portion extends in a first direction, the first radiating body of the second radiating portion extends in a second direction, the second radiating body of the second radiating portion extends in a third direction, the third radiating body of the second radiating portion extends in the first direction, the fourth radiating portion extends in the first direction, and the first direction, the second direction, and the third direction are different from each other.

5. The antenna structure of claim 1, wherein the first radiating portion comprises a first body, a first protruding body coupled to the first body and protruding toward the third radiating portion, and a first slot concavely disposed with respect to the first body.

6. The antenna structure of claim 1, wherein the fourth radiating portion and the feeding portion have a first predetermined distance between 1 mm and 2 mm in a first direction.

7. The antenna structure of claim 1, wherein the first radiating portion and the fourth radiating portion have a second predetermined spacing therebetween in a third direction of between 1 mm and 3.5 mm.

8. The antenna structure of claim 1, wherein the fourth radiating portion and the first radiating portion are separated from each other and coupled to each other to generate an operating band having a frequency range between 3300MHz and 3800 MHz.

9. The antenna structure of claim 1, wherein the third radiating portion and the second radiating portion are separated from each other and coupled to each other, and the third radiating portion and the first radiating portion are separated from each other and coupled to each other to generate an operating band having a frequency range between 698MHz and 960 MHz.

10. The antenna structure of claim 1, wherein the first radiating portion is capable of generating an operating band having a frequency range between 1450MHz and 2300MHz and an operating band having a frequency range between 5100MHz and 5850 MHz.

11. The antenna structure of claim 1, wherein the second radiating portion is capable of generating an operating band having a frequency range between 2300MHz and 2700 MHz.

12. The antenna structure of claim 1, wherein the second radiating portion and the third radiating portion are separated from each other and coupled to each other to generate an operating band having a frequency range between 4600MHz and 5400 MHz.

13. An antenna structure, the antenna structure comprising:

the first radiating piece comprises a first radiating part, a second radiating part and a feed-in part coupled between the first radiating part and the second radiating part;

the second radiating element comprises a third radiating part, a fourth radiating part and a grounding part coupled between the third radiating part and the fourth radiating part, wherein the third radiating part and the first radiating part are separated from each other and are mutually coupled, the third radiating part and the second radiating part are separated from each other and are mutually coupled, and the fourth radiating part and the first radiating part are separated from each other and are mutually coupled; and

the feed-in piece is coupled between the feed-in part and the grounding part;

the second radiating part comprises a first radiating body coupled to the feed-in part, a second radiating body coupled to the first radiating body and arranged in a turning way relative to the first radiating body, and a third radiating body coupled to the second radiating body and arranged in a turning way relative to the second radiating body; the first radiating part extends towards a first direction, the first radiating body of the second radiating part extends towards a second direction, the second radiating body of the second radiating part extends towards a third direction, the third radiating body of the second radiating part extends towards the first direction, the fourth radiating part extends towards the first direction, and the first direction, the second direction and the third direction are different from each other.

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