CN116315599A - Electronic device and antenna structure thereof - Google Patents

Abstract

An electronic device and an antenna structure thereof are provided. The electronic device comprises an antenna structure and a feed-in piece; the antenna structure comprises a first radiation piece, a grounding piece, a second radiation piece and a third radiation piece; the first radiation piece comprises a first radiation part, a second radiation part, a feed-in part and a grounding part; the grounding part comprises a first section, a second section, a third section, a fourth section and a fifth section; the first section is connected between the first radiation part and the feed-in part, and a first preset interval between the fourth section and the fifth section is 1mm to 20mm; the grounding piece is connected to the fourth section and the fifth section, the second radiation piece is connected to the grounding piece, the second radiation piece comprises a third radiation part, and the third radiation part and the second radiation part are separated from each other and are coupled with each other; the third radiating piece is connected to the feed-in part, and the third radiating piece and the first section are separated from each other and are mutually coupled; the feed-in piece comprises a feed-in end and a grounding end. The electronic device and the antenna structure thereof can generate an operation frequency band which can meet the requirement of high-frequency bandwidth.

Description

Electronic device and antenna structure thereof

Technical Field

The present invention relates to an electronic device, and more particularly, to an electronic device with an antenna structure.

Background

First, in addition to the trend of being light and thin in design, the current electronic devices, such as notebook computers, are also compatible with high performance. In the prior art, in order to meet the requirement of low profile height, the antenna structure design in the electronic device has a phenomenon of obviously insufficient bandwidth (especially high frequency bandwidth).

Therefore, how to improve the communication quality of the electronic device by improving the antenna structure design to overcome the above-mentioned drawbacks has become one of the important issues to be solved by the technology.

Disclosure of Invention

The invention aims to solve the technical problem of providing an electronic device and an antenna structure thereof aiming at the defects of the prior art.

In order to solve the above-mentioned problems, the present invention provides an electronic device, which includes an antenna structure and a feeding member. The antenna structure comprises a first radiating element, a grounding element, a second radiating element and a third radiating element. The first radiating element comprises a first radiating part, a second radiating part, a feed-in part and a grounding part, wherein the first radiating part extends along a first direction, the second radiating part extends along a second direction, the first direction is opposite to the second direction, the feed-in part is connected between the first radiating part and the second radiating part, the grounding part comprises a first section connected between the first radiating part and the feed-in part, a second section connected with the first section and turning relative to the first section, a third section connected with the second section and turning relative to the second section, a fourth section and a fifth section connected with the third section and turning relative to the third section, a first preset interval is arranged between the fourth section and the fifth section, and the first preset interval is between 1mm and 20mm. The grounding piece is connected to the fourth section and the fifth section. The second radiating element is connected to the grounding element and comprises a third radiating part, and the third radiating part and the second radiating part are separated from each other and are coupled with each other. The third radiating element is connected to the feed-in part, and the third radiating element and the first section of the grounding part are separated from each other and are mutually coupled. The feed-in piece comprises a feed-in end and a grounding end, wherein the feed-in end is electrically connected with the feed-in part, and the grounding end is electrically connected with the grounding piece.

In order to solve the above-mentioned problems, another technical solution adopted by the present invention is to provide an antenna structure, which includes a first radiating element, a grounding element, a second radiating element and a third radiating element. The first radiating element comprises a first radiating part, a second radiating part, a feed-in part and a grounding part, wherein the first radiating part extends along a first direction, the second radiating part extends along a second direction, the first direction is opposite to the second direction, the feed-in part is connected between the first radiating part and the second radiating part and is electrically connected with the feed-in part, the grounding part comprises a first section connected between the first radiating part and the feed-in part, a second section connected with the first section and turning relative to the first section, a third section connected with the second section and turning relative to the second section, a fourth section and a fifth section connected with the third section and turning relative to the third section, and a first preset distance is arranged between the fourth section and the fifth section and is between 1mm and 20mm. The grounding piece is connected to the fourth section and the fifth section. The second radiating element is connected to the grounding element and comprises a third radiating part, and the third radiating part and the second radiating part are separated from each other and are coupled with each other. The third radiating element is connected to the feed-in part, and the third radiating element and the first section are separated from each other and are coupled with each other.

The electronic device and the antenna structure thereof provided by the invention have the beneficial effects that the first preset interval is arranged between the fourth section and the fifth section, the first preset interval is 1mm to 20mm, and the third radiating element is connected to the feed-in part, and the third radiating element and the first section of the grounding part are separated from each other and are mutually coupled, so that the operating frequency band generated by the antenna structure in the electronic device can meet the requirement of high-frequency bandwidth.

For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.

Drawings

Fig. 1 is a schematic diagram of an antenna structure according to an embodiment of the invention.

Fig. 2 is an enlarged schematic view of section II of fig. 1.

Fig. 3 is a schematic diagram of the switching circuit, the control circuit and the fourth radiator in fig. 1.

Fig. 4 is a schematic diagram of an antenna structure according to another embodiment of the invention.

Fig. 5 is a schematic diagram of the performance of the antenna structure of the present invention.

Fig. 6 is an enlarged schematic view of section VI of fig. 5.

Description of main reference numerals:

d electronic device

T substrate

1. First radiating element

11. A first radiation part

12. A second radiation part

121. Open end

13. Feed-in part

131. Feed-in place

14. Grounding part

141. First section

142. Second section

1421. First side edge

1422. Second side edge

143. Third section

144. Fourth section

145. Fifth section

15. Fourth radiating part

151. 152 side edges

16. Radiation support

161. Open end

2. Second radiating element

21. A third radiation part

211. Open end

22. Body part

23. Connecting part

231. Junction joint

3. Third radiating element

4. Grounding piece

5. Fourth radiating element

G1 First predetermined distance

G2 A second predetermined distance

H1 First predetermined distance

H2 Second predetermined distance

H3 Third predetermined distance

E1 First electrical length

E2 Second electrical length

L1 first predetermined length

L2 second predetermined length

W1 first predetermined width

W2 second predetermined width

F feed-in piece

F1 Feed-in terminal

F2 Grounding end

S switching circuit

R control circuit

P signal conduction path

P1 first path

P2 second path

P3 third path

SW1 first switch

SW2 second change-over switch

SW3 third switch

A1 First passive element

A2 Second passive element

M1, M2, M3, M4 curves

X, Y direction

Detailed Description

The following specific embodiments are described in order to explain the present invention, and a person skilled in the art will be able to appreciate the advantages and effects of the present invention from the disclosure of the present invention. The invention is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all from the point of view and application, all without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention. In addition, it should be understood that, although terms such as "first," "second," "third," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used primarily to distinguish one element from another element. In addition, the term "or" as used herein shall include any one or more combinations of the associated listed items as the case may be. In addition, the term "or" as used herein shall include any one or more combinations of the associated listed items as the case may be. In addition, "connection" in the present invention is that there is a physical connection between two elements and is a direct connection or an indirect connection, and "coupling" in the present invention is that there is no physical connection between two elements but the electric field energy (electric field energy) generated by the current of one element excites the electric field energy of the other element.

Examples (example)

Referring to fig. 1, an embodiment of the invention provides an electronic device D, which includes an antenna structure and a feeding element F. The antenna structure comprises a first radiating element 1, a second radiating element 2, a third radiating element 3 and a grounding element 4. In addition, the antenna structure may further include a substrate T, and the first radiating element 1, the second radiating element 2, and the grounding element 4 may be disposed on the substrate T. For example, the first radiating element 1, the second radiating element 2, the third radiating element 3 and the grounding element 4 may be a metal sheet, a metal wire or other conductive material with conductive effect, the feeding element F may be a Coaxial cable (Coaxial cable), and the substrate T may be an FR4 (frame reflector 4) substrate, a printed circuit board (Printed Circuit Board, PCB) or a flexible printed circuit board (Flexible Printed Circuit Board, FPCB).

The first radiating element 1 includes a first radiating portion 11, a second radiating portion 12, a feeding portion 13, and a grounding portion 14. The first radiation portion 11 extends in a first direction (positive X-axis direction), and the second radiation portion 12 extends in a second direction (negative X-axis direction), that is, the first radiation portion 11 and the second radiation portion 12 are parallel to each other and extend in opposite directions. Further, the length of the first radiation portion 11 extending in the first direction is longer than the length of the second radiation portion 12 extending in the second direction. In addition, the feeding portion 13 is connected between the first radiating portion 11 and the second radiating portion 12, and the feeding portion 13 may extend toward a third direction (negative Y direction) with respect to a connection between the feeding portion 13 and the second radiating portion 12. One end of the grounding part 14 is connected between the first radiation part 11 and the feed-in part 13, and the other end is connected with the grounding piece 4. Thus, the first radiator 1 of the present invention may be a Planar inverted-F Antenna (PIFA) structure, but the present invention is not limited thereto.

The second radiator 2 is connected to the ground 4. The second radiating element 2 includes a third radiating portion 21, and the third radiating portion 21 and the second radiating portion 12 are separated from each other and coupled to each other. The third radiating element 3 is connected to the feed-in part 13, and the third radiating element 3 and the first section of the ground part are separated from each other and coupled to each other. The feeding element F includes a feeding end F1 and a grounding end F2, wherein the feeding end F1 is electrically connected to the feeding portion 13, and the grounding end F2 is electrically connected to the grounding element 4. For example, the third radiating portion 21 can generate a center frequency with a frequency of about 1700MHz, the second radiating portion 12 can generate a center frequency with a frequency of about 2500MHz, and the third radiating portion 21 and the second radiating portion 12 are separated from each other and coupled to each other, so as to excite a first operating frequency band with a frequency range (i.e. bandwidth) between 1710MHz and 2690 MHz.

Referring to fig. 1 and 2, fig. 2 is an enlarged schematic view of a portion II of fig. 1. The second radiator 2 further comprises a body portion 22 and a connecting portion 23. The connection portion 23 is connected to the ground 4, and the body portion 22 is connected between the third radiation portion 21 and the connection portion 23. The feeding portion 13 has a feeding portion 131, and the feeding portion 131 is a connection portion where the feeding end F1 of the feeding member F is connected to the feeding portion 13. Therefore, the feeding element F is electrically connected to the feeding end F1 through the feeding portion 131 to feed a signal, and transmits the signal to the feeding portion 13. The connecting portion 23 is electrically connected to a first electrical length E1 between a connecting portion 231 of the grounding element 4 and an open end 211 of the third radiating portion 21, and a second electrical length E2 between the feeding portion 131 and an open end 121 of the second radiating portion 12, wherein the first electrical length E1 is greater than the second electrical length E2 (it is noted that the electrical length refers to a length of an electrical path of the signal when the signal is transmitted on the radiating element). In addition, the body portion 22 has a first predetermined width W1 in the horizontal direction (parallel to the first direction), the connecting portion 23 has a second predetermined width W2 in the vertical direction (parallel to the third direction), and the first predetermined width W1 is greater than twice the second predetermined width W2. The present invention can further adjust the bandwidth of the first operating frequency band of the antenna structure to be greater than the range of 1710MHz to 2690MHz by the above-mentioned technical feature that the first predetermined width W1 is greater than twice the second predetermined width W2.

In the above description, the third radiation portion 21 is separated from the grounding member 4 by a first predetermined distance H1, and the second radiation portion 12 is separated from the grounding member 4 by a second predetermined distance H2, wherein the first predetermined distance H1 is not equal to the second predetermined distance H2. It should be noted that, in the present embodiment, the first predetermined distance H1 is greater than the second predetermined distance H2, that is, the third radiation portion 21 is farther from the grounding element 4 than the second radiation portion 12. Therefore, the present invention improves the Gain (Gain) in the bandwidth range between 1710MHz and 2300MHz in the first operating band by the design that the third radiating portion 21 is further away from the ground element 4 than the second radiating portion 12.

With continued reference to fig. 1, the grounding portion 14 includes a first section 141 connected between the first radiating portion 11 and the feeding portion 13, a second section 142 connected to the first section 141 and turning with respect to the first section 141, a third section 143 connected to the second section 142 and turning with respect to the second section 142, and a fourth section 144 and a fifth section 145 connected between the third section 143 and the grounding member 4 and turning with respect to the third section 143. The third radiator 3 and the first section 141 of the ground 14 are separated from each other and coupled to each other to generate a second operating band having a frequency range between 3GHz and 4 GHz. The third radiator 3 extends along the first direction and has a first predetermined length L1 in the first direction, the first predetermined length L1 being equal to one sixteenth wavelength of a center frequency of the first operating band. It should be noted that the third radiator 3 and the first section 141 have a second predetermined gap G2 therebetween, and the present invention can increase the coupling amount between the third radiator 3 and the first section 141 and adjust the bandwidth from 3GHz to 4GHz by adjusting the size of the second predetermined gap G2 so that the third radiator 3 is closer to the first section 141 (i.e. the second predetermined gap G2 is smaller).

As mentioned above, the second section 142 of the grounding portion 14 can generate a third operating frequency band between 4GHz and 6 GHz. The second section 142 extends along the third direction, and the second section 142 has a first side 1421 and a second side 1422 parallel to the third direction, and a third predetermined distance H3 is provided between the first side 1421 and the second side 1422, wherein the third predetermined distance H3 is equal to one sixteenth wavelength of a center frequency of the third operating frequency band. Further, the fourth section 144 and the fifth section 145 are parallel to each other, and a first predetermined distance G1 is provided between the fourth section 144 and the fifth section 145, and the first predetermined distance G1 is between 1mm and 20mm.

With continued reference to fig. 1, the first radiation member 1 further includes a fourth radiation portion 15, and the fourth radiation portion 15 is connected to the first radiation portion 11. The fourth radiating portion 15 extends in the second direction (opposite to the extending direction of the first radiating portion 11). The fourth radiating portion 15 and the third radiating portion 21 and the second radiating portion 12 are separated from each other and coupled to each other to generate a fourth operating frequency band having a frequency range between 4GHz and 5 GHz. Further, the fourth radiating portion 15 has a second predetermined length L2 (or a distance between two opposite sides 151, 152 of the fourth radiating portion 15) in the second direction, and the second predetermined length L2 is equal to a quarter wavelength of a center frequency of the fourth operating frequency band. In addition, the antenna structure further includes a fourth radiating element 5 electrically connected to the ground element 4, the first radiating portion 11 can generate a center frequency with a frequency of about 824MHz, and the first radiating portion 11 is separated from the fourth radiating element 5 and coupled to each other to excite a fifth operating frequency band with a frequency range between 698MHz and 960 MHz.

In the above, further, the fourth section 144 is related to low frequencies (698-960 MHz, i.e., the fifth operating band), and the fifth section 145 is related to high frequencies (3-6 GHz, i.e., the second operating band and the third operating band). The present invention can adjust the length of the electrical path running through the fourth section 144 or the fifth section 145 by adjusting the width of the first predetermined gap G1, so that the frequency is shifted. For example, adjusting the width of the first predetermined gap G1 to widen (i.e., the fifth section 145 moves in the positive X direction) with the position of the fourth section 144 fixed, then the frequency shifts toward high frequency; if the width of the first predetermined gap G1 is adjusted to be narrower (the fifth section 145 moves in the negative X direction), the frequency is shifted toward a lower frequency. Conversely, adjusting the width of the first predetermined gap G1 to be wider (i.e., the fourth segment 144 moves in the negative X direction) with the fifth segment 145 fixed, the frequency being shifted toward lower frequencies; if the width of the first predetermined pitch G1 is adjusted to be narrower (the fourth segment 144 moves in the positive X direction), the frequency is shifted to a high frequency.

Next, referring to fig. 1 and fig. 4 together, fig. 4 is a schematic diagram of an antenna structure according to another embodiment of the invention. As can be seen from comparing fig. 4 with fig. 1, fig. 4 and fig. 1 have similar structures (their similarities are not repeated). The difference is that the fourth radiating portion 15 in fig. 4 further comprises a radiating branch portion 16, the radiating branch portion 16 extending along the second direction (opposite to the extending direction of the third radiating portion 21). Further, the radiating branch 16 is located above the third radiating portion 21, and the second radiating portion 12 is located below the third radiating portion 21, that is, the third radiating portion 21 is located between the radiating branch 16 and the second radiating portion 12. Therefore, the invention can adjust the bandwidth and impedance matching of the antenna structure at high frequency (5 GHz) by arranging the radiation branch part 16. It should be noted that, in the embodiment shown in fig. 4, the second predetermined length L2 refers to a distance between the side 151 of the fourth radiating portion 15 and an open end 161 of the radiating branch portion 16.

Referring to fig. 1 and 3, fig. 3 is a schematic diagram of the switching circuit, the control circuit and the fourth radiating element in fig. 1. The antenna structure further comprises a switching circuit S electrically connected between the fourth radiating element 5 and the grounding element 4. The present invention is able to further adjust the different center frequencies in the fifth operating band by switching of the switching circuit S. For example, the switching circuit S includes a first mode and a second mode, the first mode has a first path P1, and the second mode has a second path P2. The first path P1 has a first impedance value, the second path P2 has a second impedance value, and the first impedance value is different from the second impedance value.

In addition, the electronic device D may further include a control circuit R electrically connected to the switching circuit S. The control circuit R controls the switching circuit S to switch between one of the first mode and the second mode, so as to control the operating frequency band of the antenna structure by using the control circuit R. For example, the control circuit R may be a micro controller (micro controller) or a circuit on a motherboard (Mainboard) to control the switching circuit S, but the invention is not limited thereto.

For example, the switching circuit S includes a signal conducting path P and at least one ground path electrically connected to the signal conducting path P, and in fig. 3, a first path P1, a second path P2 and a third path P3 are taken as an example. Further, a switch (e.g., a first switch SW1, a second switch SW2, and/or a third switch SW 3) may be connected in series to at least one ground path. In addition, the grounding path may be connected in series with passive elements (e.g., the first passive element A1 and/or the second passive element A2) in addition to being connected in series with a switch. For example, the passive element may be an inductance, a capacitance, or a resistance, and the electronic device D may adjust an operation frequency band, an impedance matching, a value of return loss, and/or a radiation efficiency of the antenna structure by using the arrangement of the passive element. In addition, the grounding path is not provided with any passive element, that is, the invention is not limited by the arrangement of the passive element. Further, the control circuit R can be used to control whether at least one grounding path (e.g. the first path P1, the second path P2 and/or the third path P3) is turned on, so as to control the switching circuit S to switch between one of the first mode and the second mode by selecting the grounding path.

As shown in fig. 3, the first path P1, the second path P2 and the third path P3 are electrically connected to the signal transmission path P, and the first path P1, the second path P2 and the third path P3 are respectively connected in series with a first switch SW1, a second switch SW2 and a third switch SW3. The first path P1 is not provided with a passive element, the second path P2 is connected with a first passive element A1 in series, and the third path P3 is connected with a second passive element A2 in series. For example, the first passive element A1 on the second path P2 may be a capacitor of 6.8pF, and the second passive element A2 on the third path P3 may be an inductance of 18nH, but the invention is not limited thereto.

In addition, for example, the present invention can be developed into four mode switching embodiments, in which the fourth radiating element 5 is electrically connected to the control circuit R through the signal conducting path P, and the first path P1, the second path P2 and the third path P3 are all in an open state; the second mode is that the fourth radiating element 5 is grounded through the first path P1, that is, the fourth radiating element 5 is electrically connected to the control circuit R through the signal conducting path P, and the first path P1 is in a conducting state, and at this time, the second path P2 and the third path P3 are both in an open state; the third mode is that the fourth radiating element 5 is grounded through the second path P2, that is, the fourth radiating element 5 is electrically connected to the control circuit R through the signal conducting path P, and the second path P2 is in a conducting state, and at this time, the first path P1 and the third path P3 are both in an open state; the fourth mode is that the fourth radiating element 5 is grounded through the third path P3, that is, the fourth radiating element 5 is electrically connected to the control circuit R through the signal conducting path P, and the third path P3 is in a conducting state, and at this time, the first path P1 and the second path P2 are both in an open state.

Thus, when the first path P1 is in a conductive state and the second and third paths P2 and P3 are in a non-conductive state, the center frequency of the operating band with the frequency range between 698MHz and 960MHz may be closer to 698MHz, and when the second path P2 is in a conductive state and the first and third paths P1 and P3 are in a non-conductive state, the center frequency of the operating band with the frequency range between 698MHz and 960MHz may be closer to 960MHz, but the invention is not limited thereto. In other words, the switching circuit S may selectively utilize the first passive element A1 and/or the second passive element A2 to adjust the center frequency of the fifth operating frequency band.

Next, referring to fig. 5 and 6, fig. 5 is a schematic diagram illustrating performance of the antenna structure of the present invention, and fig. 6 is an enlarged schematic diagram illustrating a VI portion of fig. 5. The curve M1 in fig. 5 and 6 is a curve of the return loss of the electronic device D in the case of the first mode. In the first mode, the fourth radiator 5 is electrically connected to the control circuit R through the signal conducting path P, and the first switch SW1, the second switch SW2 and the third switch SW3 are in a non-conductive state. The curve M2 in fig. 5 and 6 is a curve of the return loss of the electronic device D in the case of the second mode. In the second mode, the fourth radiating element 5 is electrically connected to the control circuit R through the signal conducting path P, the first switch SW1 is in a conductive state, and the second switch SW2 and the third switch SW3 are in a non-conductive state. The curve M3 in fig. 5 and 6 is a curve of the return loss of the electronic device D in the case of the third mode. In the third mode, the fourth radiating element 5 is electrically connected to the control circuit R through the signal conducting path P, the second switch SW2 is in a conductive state, and the first switch SW1 and the third switch SW3 are in a non-conductive state. The curve M4 in fig. 5 and 6 is a curve of return loss of the electronic device D in the fourth mode, in which the fourth radiating element 5 is electrically connected to the control circuit R through the signal conducting path P, the third switch SW3 is in a conductive state, and the first switch SW1 and the second switch SW2 are in a non-conductive state. Therefore, the invention can adjust the operating frequency band, impedance matching, return loss value and/or radiation efficiency generated by the antenna structure through the selection of different paths, so that the bandwidth generated by the antenna structure can meet the requirements of users (namely, the Specification (SPEC) shown in fig. 5 and 6).

Advantageous effects of the embodiment

The electronic device D and the antenna structure thereof provided by the invention have the beneficial effects that the third radiating portion 21 and the second radiating portion 12 can be separated from each other and mutually coupled to excite a first operation frequency band with a frequency range (i.e. bandwidth) between 1710MHz and 2690 MHz; and the third radiator 3 and the first section 141 of the ground 14 are separated from each other and coupled to each other to generate a second operating frequency band having a frequency range between 3GHz and 4 GHz. In addition, the present invention can also generate a third operating frequency band between 4GHz and 6GHz through the second section 142 of the grounding portion 14. In addition, the fourth radiating portion 15, the third radiating portion 21 and the second radiating portion 12 are separated from each other and coupled to each other, so as to generate a fourth operating frequency band with a frequency range between 4GHz and 5 GHz. In addition, the first radiating part 11 and the fourth radiating part 5 are separated from each other and coupled to each other to excite a fifth operation frequency band having a frequency range between 698MHz to 960 MHz. Therefore, the operating frequency band generated by the antenna structure in the electronic device D can meet the requirements of high-frequency and low-frequency bandwidths and meets the specifications of Sub-6 full-band antennas.

The above disclosure is only a preferred embodiment of the present invention and is not intended to limit the scope of the claims, so that all equivalent technical variations made by the present description and drawings are included in the scope of the claims.

Claims (17)

1. An electronic device, the electronic device comprising:

an antenna structure, the antenna structure comprising:

the first radiating element comprises a first radiating part, a second radiating part, a feed-in part and a grounding part, wherein the first radiating part extends along a first direction, the second radiating part extends along a second direction, the first direction is opposite to the second direction, the feed-in part is connected between the first radiating part and the second radiating part, the grounding part comprises a first section connected between the first radiating part and the feed-in part, a second section connected with the first section and turning relative to the first section, a third section connected with the second section and turning relative to the second section, a fourth section and a fifth section connected with the third section and turning relative to the third section, a first preset distance is arranged between the fourth section and the fifth section, and the first preset distance is 1mm to 20mm;

the grounding piece is connected to the fourth section and the fifth section;

the second radiation piece is connected to the grounding piece and comprises a third radiation part, and the third radiation part and the second radiation part are separated from each other and are coupled with each other;

a third radiating element connected to the feed-in part, wherein the third radiating element and the first section are separated from each other and coupled with each other; and

the feed-in piece comprises a feed-in end and a grounding end, wherein the feed-in end is electrically connected with the feed-in part, and the grounding end is electrically connected with the grounding piece.

2. The electronic device of claim 1, wherein the third radiating element is coupled to the first section of the ground to generate a second operating frequency band having a frequency range between 3GHz and 4 GHz; the third radiating element extends along the first direction and has a first predetermined length in the first direction, and the first predetermined length is equal to one sixteenth wavelength of a center frequency of the second operating frequency band.

3. The electronic device of claim 1, wherein the third radiating portion is coupled to the second radiating portion to generate a first operating frequency band having a frequency range between 1710Hz and 2690 Hz; the third radiation part is separated from the grounding part by a first preset distance, the second radiation part is separated from the grounding part by a second preset distance, and the first preset distance is not equal to the second preset distance.

4. The electronic device of claim 1, wherein the second section of the grounding portion is capable of generating a third operating frequency band between 4GHz and 6GHz, the second section extends along a third direction, and the second section has a first side and a second side parallel to the third direction, and a third predetermined distance is provided between the first side and the second side, and the third predetermined distance is equal to one sixteenth wavelength of a center frequency of the third operating frequency band.

5. The electronic device of claim 1, wherein the first radiating element further comprises a fourth radiating portion connected to the first radiating portion, the fourth radiating portion and the third radiating portion being separated from each other and coupled to each other to generate a fourth operating frequency band having a frequency range between 4GHz and 5 GHz; the fourth radiating portion extends along the second direction and has a second predetermined length in the second direction, and the second predetermined length is equal to a quarter wavelength of a center frequency of the fourth operating frequency band.

6. The electronic device of claim 5, wherein the fourth radiating portion comprises a radiating leg extending along the second direction, and the third radiating portion is located between the radiating leg and the second radiating portion.

7. The electronic device of claim 1, wherein the second radiating element further comprises a body portion and a connecting portion, the connecting portion is connected to the grounding element, and the body portion is connected between the third radiating portion and the connecting portion; the connecting part is electrically connected between a connecting part of the grounding part and an open end of the third radiating part, the feed-in part is provided with a feed-in part, a second electric length is arranged between the feed-in part and the open end of the second radiating part, and the first electric length is larger than the second electric length; the body part has a first preset width in the first direction, the connecting part has a second preset width in a third direction, the first direction is perpendicular to the third direction, and the first preset width is larger than twice the second preset width.

8. The electronic device of claim 1, wherein the antenna structure further comprises a fourth radiating element and a switching circuit electrically connected to the fourth radiating element; the fourth radiating element is coupled to the first radiating element and is switched by the switching circuit to generate operation frequency bands with different center frequencies, wherein the switching circuit comprises a first mode and a second mode, the first mode is provided with a first path, and the second mode is provided with a second path; the first path has a first impedance value, the second path has a second impedance value, and the first impedance value is different from the second impedance value.

9. The electronic device of claim 8, further comprising a control circuit electrically connected to the switching circuit, the switching circuit being controlled by the control circuit to switch to one of the first mode and the second mode.

10. An antenna structure, the antenna structure comprising:

the first radiating element comprises a first radiating part, a second radiating part, a feed-in part and a grounding part, wherein the first radiating part extends along a first direction, the second radiating part extends along a second direction, the first direction is opposite to the second direction, the feed-in part is connected between the first radiating part and the second radiating part and is electrically connected with the feed-in part, the grounding part comprises a first section connected between the first radiating part and the feed-in part, a second section connected with the first section and turning relative to the first section, a third section connected with the second section and turning relative to the second section, a fourth section and a fifth section connected with the third section and turning relative to the third section, a first preset distance is arranged between the fourth section and the fifth section, and the first preset distance is 1mm to 20mm;

the grounding piece is connected to the fourth section and the fifth section;

the second radiation piece is connected to the grounding piece and comprises a third radiation part, and the third radiation part and the second radiation part are separated from each other and are coupled with each other; and

and the third radiating piece is connected to the feed-in part, and the third radiating piece and the first section are separated from each other and are mutually coupled.

11. The antenna structure of claim 10, wherein the third radiator is coupled to the first section of the ground to generate a second operating band having a frequency range between 3GHz and 4 GHz; the third radiating element extends along the first direction and has a first predetermined length in the first direction, and the first predetermined length is equal to one sixteenth wavelength of a center frequency of the second operating frequency band.

12. The antenna structure of claim 10, wherein the third radiating portion is coupled to the second radiating portion to generate a first operating frequency band having a frequency range between 1710Hz and 2690 Hz; the third radiation part is separated from the grounding part by a first preset distance, the second radiation part is separated from the grounding part by a second preset distance, and the first preset distance is not equal to the second preset distance.

13. The antenna structure of claim 10, wherein the second section of the ground portion is capable of generating a third operating band between 4GHz and 6GHz, the second section extending along a third direction, the second section having a first side and a second side parallel to the third direction, the first side and the second side having a third predetermined distance therebetween, the third predetermined distance being equal to one sixteenth wavelength of a center frequency of the third operating band.

14. The antenna structure of claim 10, wherein the first radiating element further comprises a fourth radiating portion connected to the first radiating portion, the fourth radiating portion and the third radiating portion being separated from each other and coupled to each other to generate a fourth operating band having a frequency range between 4GHz and 5 GHz; the fourth radiating portion extends along the second direction and has a second predetermined length in the second direction, and the second predetermined length is equal to a quarter wavelength of a center frequency of the fourth operating frequency band.

15. The antenna structure of claim 14, wherein the fourth radiating portion comprises a radiating leg extending along the second direction, and the third radiating portion is located between the radiating leg and the second radiating portion.

16. The antenna structure of claim 10, wherein the second radiating element further comprises a body portion and a connecting portion, the connecting portion is connected to the grounding element, and the body portion is connected between the third radiating portion and the connecting portion; the connecting part is electrically connected between a connecting part of the grounding part and an open end of the third radiating part, the feed-in part is provided with a feed-in part, a second electric length is arranged between the feed-in part and the open end of the second radiating part, and the first electric length is larger than the second electric length; the body part has a first preset width in the first direction, the connecting part has a second preset width in a third direction, the first direction is perpendicular to the third direction, and the first preset width is larger than twice the second preset width.

17. The antenna structure of claim 10, further comprising a fourth radiating element and a switching circuit electrically connected to the fourth radiating element; the fourth radiating element is coupled to the first radiating element, and the fourth radiating element is switched by the switching circuit to generate operation frequency bands with different center frequencies.

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