CN117954826A - Antenna structure and electronic device - Google Patents

Abstract

An antenna structure and an electronic device. The electronic device comprises a shell and an antenna structure arranged in the shell; the antenna structure comprises a grounding piece, a feed-in radiation piece, a feed-in piece, a first grounding radiation piece and a switching element; the feed-in radiation piece comprises a first radiation part, a second radiation part and a third radiation part; the first radiating part and the second radiating part surround the first grounding radiating piece, and the first radiating part and the first grounding radiating piece are separated from each other and are coupled with each other; the switching element is electrically connected to the first grounding radiation piece; when the switching element is switched to a first mode, the first radiating part and the first grounding radiating piece are used for generating a first operation frequency band; when the switching element is switched to a second mode, the first radiating part and the first grounding radiating piece are used for generating a second operation frequency band; the center frequency of the first operating frequency band is different from the center frequency of the second operating frequency band. The antenna structure and the electronic device provided by the invention can meet the requirement of multiple frequency bands when the electronic device is miniaturized.

Description

Antenna structure and electronic device

Technical Field

The present invention relates to an antenna structure and an electronic device, and more particularly, to an antenna structure with a plurality of frequency bands and an electronic device with the 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. Recently, since the exterior of notebook computers has a design trend toward a narrow bezel. Therefore, the space on the electronic device for setting the antenna is very limited. The existing antenna architecture can have the problem of insufficient bandwidth caused by the wide reduction of the bandwidth under the requirement of a narrow frame of the electronic device.

Therefore, how to design an antenna structure capable of simultaneously transmitting and receiving a plurality of radio frequency bands and having good antenna efficiency in a limited space inside an electronic device is an important issue in the art.

Therefore, it is desirable to provide an antenna structure and an electronic device for solving the above-mentioned problems.

Disclosure of Invention

The invention mainly provides an antenna structure and an electronic device, which are used for solving the problem that the antenna structure has insufficient bandwidth under the requirement of miniaturization of the electronic device.

In order to solve the above-mentioned problems, one of the technical solutions adopted by the present invention is to provide an antenna structure, which includes a grounding element, a feeding radiation element, a feeding element, a first grounding radiation element and a switching element. The feed-in radiation piece comprises a first radiation part, a second radiation part and a third radiation part, wherein the first radiation part is connected with the second radiation part, the first radiation part comprises a feed-in part and a support arm, the third radiation part is connected with the first radiation part, the support arm extends along a first direction, the third radiation part extends along a second direction, and the first direction is different from the second direction. The grounding end of the feed-in piece is connected with the grounding piece, and the feed-in end of the feed-in piece is connected with the feed-in part or the second radiation part. The first grounding radiation piece is connected to the grounding piece, the first grounding radiation piece is surrounded by the first radiation part and the second radiation part, and the first radiation part and the first grounding radiation piece are separated from each other and are coupled with each other. The switching element is electrically connected to the first grounding radiation member. When the switching element is switched to a first mode, the first radiating part and the first grounding radiating piece are used for generating a first operation frequency band, and when the switching element is switched to a second mode, the first radiating part and the first grounding radiating piece are used for generating a second operation frequency band, and the center frequency of the first operation frequency band is different from the center frequency of the second operation frequency band.

In order to solve the above-mentioned problems, another technical solution adopted by the present invention is to provide an electronic device, which includes a housing and an antenna structure. The antenna structure is arranged on the shell. The antenna structure comprises a grounding piece, a feed-in radiation piece, a feed-in piece, a first grounding radiation piece and a switching element. The feed-in radiation piece comprises a first radiation part, a second radiation part and a third radiation part, wherein the first radiation part is connected with the second radiation part, the first radiation part comprises a feed-in part and a support arm, the third radiation part is connected with the first radiation part, the support arm extends along a first direction, the third radiation part extends along a second direction, and the first direction is different from the second direction. The grounding end of the feed-in piece is connected with the grounding piece, and the feed-in end of the feed-in piece is connected with the feed-in part or the second radiation part. The first grounding radiation piece is connected to the grounding piece, the first grounding radiation piece is surrounded by the first radiation part and the second radiation part, and the first radiation part and the first grounding radiation piece are separated from each other and are coupled with each other. The switching element is electrically connected to the first grounding radiation member. When the switching element is switched to a first mode, the first radiating part and the first grounding radiating piece are used for generating a first operation frequency band, and when the switching element is switched to a second mode, the first radiating part and the first grounding radiating piece are used for generating a second operation frequency band, and the center frequency of the first operation frequency band is different from the center frequency of the second operation frequency band.

The antenna structure and the electronic device provided by the invention have the beneficial effects that the antenna structure can meet the requirement of multiple frequency bands when the electronic device is miniaturized by the technical scheme that the first radiating part and the first grounding radiating piece are used for generating the first operating frequency band when the switching element is switched to the first mode, and the first radiating part and the first grounding radiating piece are used for generating the second operating frequency band when the switching element is switched to the second mode, and the center frequency of the first operating frequency band is different from the center frequency of the second operating frequency band.

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 electronic device according to the present invention.

Fig. 2 is a schematic plan view of an antenna structure according to a first embodiment of the present invention.

Fig. 3 is a schematic plan view of another embodiment of an antenna structure according to the first embodiment of the present invention.

Fig. 4 is an enlarged schematic diagram of a switching element of an antenna structure according to a first embodiment of the present invention.

Fig. 5 is a schematic diagram of a voltage standing wave ratio of an antenna structure according to a first embodiment of the present invention.

Fig. 6 is a first perspective view of an antenna structure according to a first embodiment of the present invention.

Fig. 7 is a second perspective view of the antenna structure according to the first embodiment of the present invention.

Fig. 8 is a schematic plan view of an antenna structure according to a second embodiment of the present invention.

Fig. 9 is a schematic plan view of an antenna structure according to a third embodiment of the present invention.

Fig. 10 is a schematic plan view of an antenna structure according to a fourth embodiment of the present invention.

Description of main reference numerals:

D electronic device

T-shaped shell

M, M1, M2, M3, M4 antenna structure

S-shaped carrier plate

1. Grounding piece

2. Feed-in radiation piece

21. A first radiation part

211. Feed-in part

212. Support arm

22. A second radiation part

221. First branch circuit

222. A second branch

223. Third branch circuit

23. A third radiation part

24. Fourth radiating part

3. Feed-in piece

31. Grounding end

32. Feed-in terminal

4. First grounding radiation piece

41. First grounding support

411. First extension part

412. Second extension part

413. Third extension part

414. Fourth extension part

42. Second grounding support

421. First section

422. Second section

423. Third section

4231. Open end

43. Third grounding support

5. Switching element

6. Proximity sensing circuit

7. Second grounding radiation piece

F feed-in point

P1 first path

P2 second path

P3 third path

P4 fourth path

C capacitor element

C1 First capacitive element

C2 Second capacitive element

C3 Third capacitive element

L1 first inductance element

L2 second inductance element

G1 First coupling gap

G2 Second coupling gap

G3 Third coupling gap

G4 Fourth coupling gap

J connection point

W1 first conduction path

W2 second conduction path

W3 third conduction path

W4 fourth conduction path

SW1 first switch

SW2 second change-over switch

SW3 third switch

SW4 fourth change-over switch

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 combination of more of the associated listed items as the case may be. In addition, the term "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 the term "coupling" in the present invention is that two elements are separated from each other and have no physical connection, but the electric field energy (ELECTRIC FIELD ENERGY) generated by the current of one element excites the electric field energy of the other element.

Referring to fig. 1, fig. 1 is a schematic diagram of an electronic device according to the present invention. The present invention provides an electronic device D, which may be a Smart Phone, a Tablet Computer (Tablet Computer) or a notebook Computer (Notebook Computer), but the invention is not limited thereto. The present invention will be exemplified by an electronic device D as a notebook computer. The electronic device D includes an antenna structure M and a housing T (at least a portion of the housing T may be a metal housing), and the electronic device D can generate at least one operating frequency band through the antenna structure M. In addition, for example, the antenna structure M is disposed at a frame of the electronic device D, but the present invention is not limited to the number and the positions of the antenna structure M in the electronic device D.

First embodiment

Referring to fig. 2, fig. 2 is a schematic plan 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 M1, which includes a grounding element 1, a feeding radiation element 2, a feeding element 3, a first grounding radiation element 4, and a switching element 5. The grounding member 1 is electrically connected to the housing T. The feed-in radiator 2 comprises a first radiator 21, a second radiator 22 and a third radiator 23. The first radiation portion 21 is connected to the second radiation portion 22, the first radiation portion 21 includes a feeding portion 211 and a supporting arm 212, and the second radiation portion 22 is closer to the grounding element 1 than the supporting arm 212. The third radiating portion 23 is connected to the first radiating portion 21. The arm 212 extends in a first direction (negative X-axis direction), and the third radiating portion 23 extends in a second direction (positive X-axis direction), the first direction being different from the second direction.

As mentioned above, the grounding end 31 of the feeding element 3 is connected to the grounding element 1, and the feeding end 32 of the feeding element 3 is connected to the feeding element 211 or the second radiation element 22. In the present embodiment, the feeding end 32 is connected between the feeding portion 211 and the second radiating portion 22, and the feeding element 3 feeds a signal through the feeding portion 211. The first grounding radiation member 4 is connected to the grounding member 1, and as shown in fig. 2, the first radiation portion 21 and the second radiation portion 22 surround the first grounding radiation member 4. The first radiating portion 21 and the first ground radiating member 4 are separated from each other and coupled to each other. The switching element 5 is electrically connected to the first grounding radiation member 4.

With continued reference to fig. 2, the antenna structure M1 further includes a first inductance element L1. The second radiating portion 22 includes a first branch 221, a second branch 222, and a third branch 223. The first branch 221 is connected to the feeding member 3, and the third branch 223 is connected to the second branch 222. The first inductance element L1 is connected between the first branch 221 and the second branch 222. More precisely, the first branch 221 is not directly connected to the second branch 222, but is connected to the second branch 222 through the first inductance element L1. The first inductance element L1 ranges from 1nH to 6 nH. Preferably, in the present invention, the first inductance element L1 is 2.7nH. The first ground radiator 4 comprises a first ground branch 41, a second ground branch 42 and a third ground branch 43. The first grounding branch 41 is connected to the grounding element 1, and the first grounding branch 41, the second grounding branch 42 and the third grounding branch 43 are connected to a connection point J.

Further, the first grounding trace 41 includes a first extension 411, a second extension 412, a third extension 413, and a fourth extension 414. The first extension 411 is connected to the ground member 1. The second extension 412 is connected between the first extension 411 and the third extension 413. The third extension 413 is connected between the second grounding branch 42 and the third grounding branch 43. The fourth extension 414 is connected to the first extension 411 and extends in the first direction. The second grounding trace 42 includes a first section 421, a second section 422, and a third section 423. The first section 421 is connected to the connection point J, and the second section 422 is connected between the first section 421 and the third section 423. The third section 423 has an open end 4231. The switching element 5 is connected in series between the second section 422 and the third section 423.

The first radiation portion 21 has a first coupling gap G1 with the second grounding branch 42 and the third grounding branch 43 of the first grounding radiation member 4. The second radiation portion 22 has a second coupling gap G2 between the first grounding branch 41 and the third grounding branch 43 of the first grounding radiation member 4. The ground element 1 and the second radiating portion 22 have a third coupling gap G3 therebetween. The distance of any one of the first, second and third coupling gaps G1, G2 and G3 is less than or equal to 3mm. Furthermore, the antenna structure M1 further comprises a second ground radiator 7. The second ground radiator 7 is connected to the ground 1. The feed radiation piece 2 further comprises a fourth radiation portion 24. The fourth radiating portion 24 is connected to the first radiating portion 21 and is adjacent to the second grounding radiating member 7, and a fourth coupling gap G4 is provided between the fourth radiating portion 24 and the second grounding radiating member 7. The distance of any part of the fourth coupling gap G4 is less than or equal to 3mm.

Next, referring to fig. 3, fig. 3 is a schematic plan view of another embodiment of an antenna structure according to the first embodiment of the present invention. Other structures of the antenna structure M1 in fig. 3 are the same as those in fig. 2, and are not described here again. As can be seen from comparing fig. 2 and fig. 3, the difference between the two is that the first extension 411 in fig. 2 is straight, and the first extension 411 in fig. 3 is serpentine.

Referring to fig. 3 and 5, fig. 5 is a schematic diagram of a voltage standing wave ratio of an antenna structure according to a first embodiment of the present invention. The first radiating portion 21 and the second ground branch 42 are coupled to each other and a frequency range between 617MHz and 960MHz is generated by a switching mechanism of the switching element 5. The first branch 221, the second branch 222 and the first inductance element L1 are coupled to the first extension 411, and the third branch 223 is coupled to the third ground branch 43 to generate a frequency range between 1440MHz and 1700 MHz. Further, the antenna structure M1 may improve matching and control frequency offset by changing the shape of the first extension 411 (e.g., from the straight shape of fig. 2 to the serpentine shape of fig. 3). Then, the first branch 221, the second branch 222 and the first inductance element L1 can be coupled to the third grounding branch 43, and the fourth extension 414 is excited to generate a frequency range between 1700MHz and 2200 MHz. The third radiating portion 23 is excited to produce a frequency range between 2200MHz and 2700 MHz. The first radiating portion 21 and the second grounding trace 42 are coupled to each other, and the fourth extending portion 414 and the third grounding trace 43 are excited to generate a frequency range between 3300MHz and 3800 MHz. The first radiation portion 21 and the third radiation portion 23 are excited to jointly generate a frequency range between 3800MHz and 4500 MHz. The first branch 221 and the first inductance element L1 are excited, and the second grounding radiation member 7 and the fourth radiation portion 24 are coupled to each other to generate a frequency range between 4500MHz and 5500 MHz. The second ground branch 42 is excited and the second ground radiator 7 and the fourth radiator 24 are coupled to each other to jointly generate a frequency range between 5500MHz and 6000 MHz.

Referring to fig. 4, fig. 4 is an enlarged schematic diagram of a switching element of an antenna structure according to a first embodiment of the present invention. The switching element 5 includes a plurality of modes, which correspond to a plurality of conduction paths, respectively. Thus, the switching element 5 can be switched to different conduction paths by an open or short circuit of different switching switches. For example, in the present embodiment, the switching element 5 includes a first conductive path W1, a second conductive path W2, a third conductive path W3, and a fourth conductive path W4. The first conduction path W1 has a first switch SW1, the second conduction path W2 has a second switch SW2 and a first capacitive element C1, the third conduction path W3 has a third switch SW3 and a second capacitive element C2, and the fourth conduction path W4 has a fourth switch SW4 and a third capacitive element C3. The first capacitive element C1, the second capacitive element C2 and the third capacitive element C3 are different from each other, for example, the capacitance value of the first capacitive element C1 is 7pF, the capacitance value of the second capacitive element C2 is 1.8pF, and the capacitance value of the third capacitive element C3 is 0.7pF, but the invention is not limited thereto.

As shown in fig. 3 to 5, the antenna structure M1 can generate a low frequency range between 617MHz and 960MHz by the switching mechanism of the switching element 5. Specifically, the switching mechanism of the switching element 5 includes a first Mode (Mode 1), a second Mode (Mode 2), a third Mode (Mode 3), a fourth Mode (Mode 4), and a fifth Mode (Mode 5).

When the switching element 5 is switched to the first mode, the first switching switch SW1 is in a conductive state, and the other switching switches (SW 2 to SW 4) are in a non-conductive state. At this time, the signal fed by the feeding element 3 through the feeding element 211 passes through the first path P1. The first path P1 includes a first section 421, a second section 422, and a third section 423 of the second ground branch 42, and a first conductive path W1 of the switching element 5. Thereby, the first radiating portion 21 and the second grounding branch 42 are coupled to each other to generate a first operation frequency band within a low frequency range (617 MHz to 960 MHz). It is further worth mentioning that as is evident from fig. 3, the switching element 5 is located in the first path P1, and the switching element 5 is located closer to the open end 4231 of the third section 423 than the connection point J, or the switching element 5 is located between the midpoint of the first path P1 and the open end 4231. The switching element 5 is arranged near the open end 4231 to cooperate with the coupling of the first radiating portion 21 and the second grounding branch 42 to generate an operation frequency band conforming to the low frequency range. When the switching element 5 is switched at a position close to the open end 4231, the middle-high frequency characteristic of the antenna structure M1 can be less affected.

When the switching element 5 is switched to the second mode, the third mode and the fourth mode respectively, the second switching switch SW2, the third switching switch SW3 and the fourth switching switch SW4 are respectively in a conductive state, and the first switching switch SW1 is in a non-conductive state. At this time, the signal fed by the feeding element 3 through the feeding element 211 passes through the first path P1. The first path P1 includes the first section 421, the second section 422, and the third section 423 of the second ground branch 42, and one of the second conductive path W2 (including the first capacitive element C1), the third conductive path W3 (including the second capacitive element C2), and the fourth conductive path W4 (including the third capacitive element C3) including the switching element 5. Thereby, the first radiating portion 21 and the second grounding branch 42 are coupled to each other to generate a second operation frequency band, a third operation frequency band, and a fourth operation frequency band within a low frequency range (617 MHz to 960 MHz).

When the switching element 5 is switched to the fifth mode, the first to fourth switches (SW 1 to SW 4) are all in a non-conductive state. At this time, the signal fed by the feeding element 3 through the feeding element 211 passes through the second path P2. The second path P2 includes a first section 421 and a second section 422 of the second ground branch 42. In other words, since all the switches are open, the current path of the signal is stopped only by the switching element 5, so that the length of the second path P2 is smaller than that of the first path P1, and the first radiating portion 21 and the second grounding branch 42 are coupled to each other to generate the fifth operating frequency band in the low frequency range (617 MHz to 960 MHz).

Further, the center frequencies of the first to fifth operation frequency bands are different from each other, and as shown in fig. 5, when the switching element 5 is switched from the first mode to the fifth mode, the center frequencies of the generated first to fifth operation frequency bands are gradually adjusted from approximately 617MHz from low to high to approximately 960MHz. In other words, the antenna structure M1 of the present invention can change the path of the signal by switching different modes, and the low frequency range can be freely switched between 617MHz and 960MHz by the arrangement of the capacitive elements with different capacitance values, so as to generate the required low frequency band.

Referring to fig. 6 and fig. 7, fig. 6 and fig. 7 are schematic perspective views of an antenna structure according to a first embodiment of the invention at different viewing angles. As can be seen from comparing fig. 3, 6 and 7, the antenna structure M1 is not limited to the present embodiment, and the antenna structure M1 can be disposed on the carrier S with different forms. For example, the antenna structure M1 may be a planar structure as shown in fig. 3, or a three-dimensional structure as shown in fig. 6 and 7. The feeding point F in fig. 6 and 7 is the position of the feeding element 3. In order to completely show the three-dimensional shape of the antenna structure M1, the feeding element 3 is omitted in fig. 6 and 7. Therefore, the antenna structure M1 of the present invention can be reduced in size by the three-dimensional structure, so that the antenna structure M1 is advantageously disposed in the electronic device D with a narrow frame screen. Meanwhile, the antenna structure M1 can cover the range from 617MHz to 960MHz by the design of the switching element 5, and then match with the intermediate frequency and the high frequency range generated by other radiation elements, so that the antenna structure M1 becomes a full-frequency LTE antenna design including the frequency range from 617MHz to 5925 MHz.

Second embodiment

Referring to fig. 8, fig. 8 is a schematic plan view of an antenna structure according to a second embodiment of the present invention. The second embodiment of the present invention provides an antenna structure M2. The antenna structure M2 has a similar structure to the antenna structure M1 of the previous embodiment, and the description thereof will be omitted. The antenna structure M2 is different from the antenna structure M1 in that the antenna structure M2 further includes a proximity sensing circuit 6 (Proximity-sensor element), a second inductance element L2, and a capacitance element C. Further, the proximity sensing circuit 6 may be a capacitance sensing circuit. The proximity sensing circuit 6 is electrically connected between the first extension 411 and the grounding element 1, the second inductance element L2 is connected between the first extension 411 and the proximity sensing circuit 6, and the capacitance element C is connected between the first extension 411 and the grounding element 1.

The present invention regards the first grounding radiation member 4 as a sensing electrode (Sensor pad) by the arrangement of the proximity sensing circuit 6. Therefore, the electronic device D can have a function of sensing whether the human body approaches the antenna structure M2, so as to adjust the radiation power of the antenna structure M2, and avoid the problem of excessively high specific absorption rate (Specific Absorption Rate, SAR) of the specific absorption rate of electromagnetic wave energy per unit mass of the living body. It should be noted that when the antenna structure M2 is shown in a three-dimensional form (as shown in fig. 6 and 7), the sensing electrode (the first grounding radiation member 4) covers the top surface parallel to the Y-axis direction and the side surface parallel to the Z-axis direction, and both surfaces belong to the surface that is closer to the user when the electronic device D is used, so that the configuration of the sensing electrode can provide a better sensing range in the present invention.

Further, the second inductance element L2 may be used as a radio frequency choke (RF choke) for blocking the ac signal output from the feeding element 3 from flowing into the proximity sensing circuit 6 and avoiding the interference between the antenna structure M2 and the proximity sensing circuit 6. The inductance value range of the second inductance element L2 is greater than 18nH, and in the embodiment of the present invention, the inductance value of the second inductance element L2 is 33nH. The capacitive element C can be used as a DC block (DC block) to prevent the DC signal generated by the proximity sensing circuit 6 from flowing into the system (refer to the internal circuit of the electronic device D) via the grounding element 1 to affect or damage other components inside the electronic device D. The capacitance range of the capacitive element C is greater than 6pF, whereas in the embodiment of the present invention, the capacitance of the capacitive element C is 33pF. However, the scope of the present invention is not limited by the second inductance element L2 and the capacitance element C.

Third embodiment

Referring to fig. 9, fig. 9 is a schematic plan view of an antenna structure according to a third embodiment of the present invention. The third embodiment of the present invention provides an antenna structure M3, and comparing fig. 9 and 8, the antenna structure M3 of fig. 9 is different from the antenna structure M2 of fig. 8 in that the proximity sensing circuit 6, the second inductance element L2 and the capacitance element C are located at different positions. In the antenna structure M3, the proximity sensing circuit 6 is electrically connected between the fourth radiating portion 24 and the grounding element 1, and the second inductance element L2 is connected between the fourth radiating portion 24 and the proximity sensing circuit 6. Further, the second radiating portion 22 and the feeding portion 211 are separated from each other, and the capacitive element C is connected between the second radiating portion 22 and the feeding portion 211. In the present embodiment, the inductance value of the second inductance element L2 is 33nH, and the capacitance value of the capacitance element C is 33pF. The second inductance element L2 serves as a radio frequency choke to block the ac signal output by the feeding member 3 from flowing into the proximity sensing circuit 6, and to avoid mutual interference between the antenna structure M3 and the proximity sensing circuit 6. The capacitor element C is used as a dc blocker to prevent the dc signal generated by the proximity sensing circuit 6 from flowing into the system (refer to the internal circuit of the electronic device D) via the feeding element 3 to affect or damage other components inside the electronic device D.

Fourth embodiment

Referring to fig. 10, fig. 10 is a schematic plan view of an antenna structure according to a fourth embodiment of the present invention. In the fourth embodiment of the present invention, an antenna structure M4 is provided, and as can be seen from comparing fig. 10 and fig. 3, the antenna structure M4 and the antenna structure M1 have similar structures, and their similar parts are not described again. The antenna structure M4 differs from the antenna structure M1 in that the position of the switching element 5 varies. In the present embodiment, the switching element 5 is connected in series between the first section 421 and the third section 423. The switching element 5 may be as shown with reference to fig. 4, but the second section 422 in fig. 4 needs to be replaced with the first section 421. Further, in the present embodiment, the switching element 5 includes a first conductive path W1, a second conductive path W2, a third conductive path W3, and a fourth conductive path W4. The first conduction path W1 has a first switch SW1, the second conduction path W2 has a second switch SW2 and a first capacitive element C1, the third conduction path W3 has a third switch SW3 and a second capacitive element C2, and the fourth conduction path W4 has a fourth switch SW4 and a third capacitive element C3. However, in the present embodiment, the capacitance value of the first capacitive element C1 is 47pF, the capacitance value of the second capacitive element C2 is 27pF, and the capacitance value of the third capacitive element C3 is 7pF.

When the switching element 5 is switched to the first mode, all of the first to fourth switching switches (SW 1 to SW 4) are in a non-conductive state. The signal fed by the feeding element 3 through the feeding element 211 passes through the third path P3. The third path P3 includes a first section 421, a second section 422, and a third section 423 of the second ground branch 42. Thereby, the first radiating portion 21 and the second grounding branch 42 are coupled to each other to generate a first operation frequency band within a low frequency range (617 MHz to 960 MHz). As is also evident from fig. 10, the switching element 5 is located in the third path P3, and the switching element 5 is located closer to the open end 4231 of the third section 423 than the connection point J, or the switching element 5 is located between the midpoint of the third path P3 and the open end 4231.

When the switching element 5 is switched to the second mode, the third mode and the fourth mode respectively, the first switching switch SW1, the second switching switch SW2 and the third switching switch SW3 are respectively in a conductive state, and the fourth switching switch SW4 is in a non-conductive state. At this time, the signal fed by the feeding element 3 through the feeding element 211 passes through the fourth path P4. The fourth path P4 includes a portion of the first section 421 and a portion of the third section 423, and one of the first conductive path W1, the second conductive path W2 (including the first capacitive element C1), and the third conductive path W3 (including the second capacitive element C2) of the switching element 5. Thereby, the first radiating portion 21 and the second grounding branch 42 are coupled to each other to generate a second operation frequency band, a third operation frequency band, and a fourth operation frequency band within a low frequency range (617 MHz to 960 MHz).

When the switching element 5 is switched to the fifth mode, the fourth switching switch SW4 is in a conductive state, and the first switching switch SW1, the second switching switch SW2 and the third switching switch SW3 are all in a non-conductive state. At this time, the signal fed by the feeding element 3 through the feeding element 211 passes through the fourth path P4. The fourth path P4 includes a portion of the first section 421 and a portion of the third section 423, and a fourth conductive path W4 (including the third capacitive element C3) of the switching element 5. Thereby, the first radiating portion 21 and the second grounding branch 42 are coupled to each other to generate a fifth operation frequency band within a low frequency range (617 MHz to 960 MHz). It is worth mentioning that the center frequencies of the first to fifth operating frequency bands are generated, the center frequency of the first operating frequency band is closest to 617MHz, and the center frequency of the fifth operating frequency band is closest to 960MHz.

Advantageous effects of the embodiment

One of the advantages of the present invention is that the antenna structures M1-M4 and the electronic device D provided by the present invention can meet the requirement of multiple frequency bands when the electronic device D is miniaturized by the technical scheme of "when the switching element 5 is switched to a first mode, the first radiating portion 21 and the first grounding radiating member 4 are used for generating the first operating frequency band, and when the switching element 5 is switched to a second mode, the first radiating portion 21 and the first grounding radiating member 4 are used for generating the second operating frequency band, and the center frequency of the first operating frequency band is different from the center frequency of the second operating frequency band".

Furthermore, the antenna structures M1-M4 provided by the present invention can change the path of the signal by switching different modes, and the low frequency range can be freely switched within the range of 617MHz to 960MHz by the arrangement of the capacitive elements with different capacitance values, so as to generate the frequency bands (i.e. the first operation frequency band to the fifth operation frequency band) of the required low frequency range. In addition, the antenna structures M1 to M4 of the present invention further generate a frequency band in a middle-high frequency range by coupling between different radiating elements, and the amount of linkage between the generated middle-high frequency band and the low frequency band is very low (i.e. not affected by switching the low frequency band). Therefore, the antenna structures M1-M4 provided by the invention can be matched with middle-high frequency bands by using different low frequency bands to generate various frequency band combinations, so that the effect of carrier aggregation (Carrier Aggregation) is achieved. In addition, through the design of the antenna structures M1-M4 provided by the invention, the antenna characteristics can be further optimized, and the requirement of more severe antenna specifications can be met.

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 (20)

1. An antenna structure, the antenna structure comprising:

A grounding member;

The feed-in radiation piece comprises a first radiation part, a second radiation part and a third radiation part, wherein the first radiation part is connected with the second radiation part, the first radiation part comprises a feed-in part and a support arm, the third radiation part is connected with the first radiation part, the support arm extends along a first direction, the third radiation part extends along a second direction, and the first direction is different from the second direction;

A feed-in piece, a grounding end of the feed-in piece is connected with the grounding piece, and a feed-in end of the feed-in piece is connected with the feed-in part or the second radiation part;

The first grounding radiation piece is connected to the grounding piece, the first radiation part and the second radiation part surround the first grounding radiation piece, and the first radiation part and the first grounding radiation piece are separated from each other and are coupled with each other; and

The switching element is electrically connected to the first grounding radiation member, wherein when the switching element is switched to a first mode, the first radiation portion and the first grounding radiation member are used for generating a first operation frequency band, and when the switching element is switched to a second mode, the first radiation portion and the first grounding radiation member are used for generating a second operation frequency band, and the center frequency of the first operation frequency band is different from the center frequency of the second operation frequency band.

2. The antenna structure of claim 1, wherein a signal passes through a first path when the switching element is switched to the first mode, and a second path when the switching element is switched to the second mode, the first path including a first capacitive element, the second path including a second capacitive element, and a capacitance of the first capacitive element being different from a capacitance of the second capacitive element.

3. The antenna structure of claim 1, further comprising a first inductance element, wherein the second radiation portion comprises a first branch, a second branch and a third branch, the first branch is connected to the feeding member, the first inductance element is connected between the first branch and the second branch, and the third branch is connected to the second branch.

4. The antenna structure of claim 1, wherein the first ground radiating element comprises a first ground branch, a second ground branch, and a third ground branch, the first ground branch being connected to the ground element, the first ground branch, the second ground branch, and the third ground branch being connected to a connection point.

5. The antenna structure of claim 4, wherein the second ground path comprises a first section, a second section and a third section, the first section is connected to the connection point, the second section is connected between the first section and the third section, the switching element is connected in series between the second section and the third section, the third section has an open end, and the switching element is closer to the open end than the connection point.

6. The antenna structure of claim 4, wherein the second ground path comprises a first section, a second section and a third section, the first section is connected to the connection point, the second section is connected between the first section and the third section, the switching element is connected in series between the first section and the third section, the third section has an open end, and the switching element is closer to the open end than the connection point.

7. The antenna structure of claim 4, wherein the first ground trace comprises a first extension, a second extension, a third extension, and a fourth extension, the first extension is connected to the ground element, the second extension is connected between the first extension and the third extension, the third extension is connected between the second ground trace and the third ground trace, and the fourth extension is connected to the first extension and extends along the first direction.

8. The antenna structure of claim 1, wherein a first coupling gap is formed between the first radiating portion and the first grounding radiating member, a second coupling gap is formed between the second radiating portion and the first grounding radiating member, a third coupling gap is formed between the grounding member and the second radiating portion, and a distance between any portion of the first coupling gap, the second coupling gap, and the third coupling gap is less than or equal to 3mm.

9. The antenna structure of claim 8, further comprising a second ground radiating element connected to the ground element, and the feed radiating element further comprises a fourth radiating portion connected to the first radiating portion and adjacent to the second ground radiating element, wherein a fourth coupling gap is provided between the fourth radiating portion and the second ground radiating element, and a distance of any portion of the fourth coupling gap is less than or equal to 3mm.

10. An electronic device, the electronic device comprising:

a housing; and

An antenna structure, the antenna structure sets up at this casing, the antenna structure includes:

A grounding member;

The feed-in radiation piece comprises a first radiation part, a second radiation part and a third radiation part, wherein the first radiation part is connected with the second radiation part, the first radiation part comprises a feed-in part and a support arm, the third radiation part is connected with the first radiation part, the support arm extends along a first direction, the third radiation part extends along a second direction, and the first direction is different from the second direction;

A feed-in piece, a grounding end of the feed-in piece is connected with the grounding piece, and a feed-in end of the feed-in piece is connected with the feed-in part or the second radiation part;

The first grounding radiation piece is connected to the grounding piece, the first radiation part and the second radiation part surround the first grounding radiation piece, and the first radiation part and the first grounding radiation piece are separated from each other and are coupled with each other; and

The switching element is electrically connected to the first grounding radiation member, wherein when the switching element is switched to a first mode, the first radiation portion and the first grounding radiation member are used for generating a first operation frequency band, and when the switching element is switched to a second mode, the first radiation portion and the first grounding radiation member are used for generating a second operation frequency band, and the center frequency of the first operation frequency band is different from the center frequency of the second operation frequency band.

11. The electronic device of claim 10, wherein a signal passes through a first path when the switching element is switched to the first mode, and a second path when the switching element is switched to the second mode, the first path including a first capacitive element, the second path including a second capacitive element, and a capacitance of the first capacitive element being different from a capacitance of the second capacitive element.

12. The electronic device of claim 10, further comprising a first inductance element, wherein the second radiation portion comprises a first branch, a second branch and a third branch, the first branch is connected to the feeding member, the first inductance element is connected between the first branch and the second branch, and the third branch is connected to the second branch.

13. The electronic device of claim 10, wherein the first grounding radiation member comprises a first grounding branch, a second grounding branch and a third grounding branch, the first grounding branch is connected to the grounding member, and the first grounding branch, the second grounding branch and the third grounding branch are connected to a connection point.

14. The electronic device of claim 13, wherein the second ground path comprises a first section, a second section and a third section, the first section is connected to the connection point, the second section is connected between the first section and the third section, the switching element is connected in series between the second section and the third section, the third section has an open end, and the switching element is closer to the open end than the connection point.

15. The electronic device of claim 13, wherein the second ground path comprises a first section, a second section and a third section, the first section is connected to the connection point, the second section is connected between the first section and the third section, the switching element is connected in series between the first section and the third section, the third section has an open end, and the switching element is closer to the open end than the connection point.

16. The electronic device of claim 13, wherein the first grounding trace comprises a first extension portion, a second extension portion, a third extension portion and a fourth extension portion, the first extension portion is connected to the grounding element, the second extension portion is connected between the first extension portion and the third extension portion, the third extension portion is connected between the second grounding trace and the third grounding trace, and the fourth extension portion is connected to the first extension portion and extends along the first direction.

17. The electronic device of claim 16, further comprising a proximity sensing circuit electrically connected between the first extension and the ground, a second inductive element connected between the first extension and the proximity sensing circuit, and a capacitive element connected between the first extension and the ground.

18. The electronic device of claim 10, wherein a first coupling gap is formed between the first radiating portion and the first grounding radiating member, a second coupling gap is formed between the second radiating portion and the first grounding radiating member, a third coupling gap is formed between the grounding member and the second radiating portion, and a distance between any portion of the first coupling gap, the second coupling gap, and the third coupling gap is less than or equal to 3mm.

19. The electronic device of claim 18, further comprising a second grounding radiating element connected to the grounding element, and the feed radiating element further comprises a fourth radiating portion connected to the first radiating portion and adjacent to the second grounding radiating element, wherein a fourth coupling gap is provided between the fourth radiating portion and the second grounding radiating element, and a distance of any portion of the fourth coupling gap is less than or equal to 3mm.

20. The electronic device of claim 19, further comprising a proximity sensing circuit electrically connected between the fourth radiating portion and the grounding element, a second inductance element connected between the fourth radiating portion and the proximity sensing circuit, and a capacitance element connected between the second radiating portion and the feeding portion.