CN106207449A - Antenna device and mobile terminal - Google Patents

Abstract

The present invention discloses an antenna device and a mobile terminal, wherein the antenna device comprises a radiation component and a feed source, wherein the radiation component comprises a first radiator and a second radiator, and the feed source is provided with a first feed end, a second feed end and a third feed end, wherein the first feed end and the second feed end are electrically connected to the first radiator and the second radiator respectively, and the third feed end is electrically connected to the first radiator and/or the second radiator. The third feed end is electrically connected to the first radiator and/or the second radiator, that is, the user can select the third feed end to switch between the first radiator and/or the second radiator as needed. Thus, the antenna device can add a communication mode to make signal adjustments, and thus can present a variety of communication functions.

Description

Antenna device and mobile terminal

technical field

The present invention relates to the communication field, in particular to an antenna device and a mobile terminal.

Background technique

At present, with the application of smart phones more and more widely, the communication requirements of mobile phones are getting higher and higher, and the communication of mobile phones often needs to reflect the change of communication functions through the change of the working mode of the antenna. However, the traditional mobile phone has a single antenna structure, resulting in a relatively single working mode of the antenna. When a user needs multiple communication functions when using a mobile phone, the antenna of the mobile phone is limited by its structure and cannot make signal adjustments, which leads to the limitation of the communication mode of the mobile phone antenna and the inability to present multiple communication functions.

Contents of the invention

The present invention provides an antenna device and a mobile terminal capable of exhibiting multiple functions.

The present invention provides an antenna device, wherein the antenna device includes a radiating component and a feeding source, the radiating component includes a first radiator and a second radiator, and the feeding source is provided with a first feeding end, a second A feed-in terminal and a third feed-in terminal, the first feed-in terminal and the second feed-in terminal are respectively electrically connected to the first radiator and the second radiator, and the third feed-in terminal can Selectively electrically connected with the first radiator or/and the second radiator.

The present invention also provides a mobile terminal, wherein the mobile terminal includes the above-mentioned antenna device.

In the antenna device and the mobile terminal of the present invention, the feeding source is provided with a first feeding end, a second feeding end and a third feeding end, and the first feeding end and the second feeding end are respectively It is always connected with the first radiator and the second radiator, so that the first radiator and the second radiator can pass through the first feed-in port and the second feed-in port respectively. The input end maintains regular communication; use the first radiator or/and the second radiator to electrically connect the third feed end, that is, the user can select the third feed end to be in the first radiating and/or switching between the second radiator. Therefore, the antenna device can add communication modes to make signal adjustments, and then can present various communication functions.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings used in the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is a schematic diagram of an antenna device provided by the present invention;

FIG. 2 is a schematic diagram of the antenna device of FIG. 1;

Fig. 3 is a schematic diagram of the antenna device of Fig. 1;

FIG. 4 is a schematic diagram of the antenna device of FIG. 1;

Fig. 5 is a schematic diagram of a first communication mode of the antenna device in Fig. 1;

FIG. 6 is a schematic diagram of a second communication mode of the antenna device in FIG. 1;

Fig. 7 is a schematic diagram of a third communication mode of the antenna device in Fig. 1;

Fig. 8 is a schematic diagram of a fourth communication mode of the antenna device in Fig. 1;

Fig. 9 is a schematic diagram of a fifth communication mode of the antenna device in Fig. 1;

FIG. 10 is a schematic diagram of a sixth communication mode of the antenna device in FIG. 1;

Fig. 11 is a schematic diagram of a mobile terminal provided by the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Please refer to FIG. 1 , an antenna device 100 provided by the present invention. The antenna device 100 includes a radiation component 10 and a feeding source 20 , and the radiation component 10 includes a first radiator 11 and a second radiator 12 . The feeding source 20 is provided with a first feeding end 21, a second feeding end 22 and a third feeding end 23, and the first feeding end 21 and the second feeding end 22 are respectively electrically connected to the The first radiator 11 and the second radiator 12 , the third feeding end 23 can be selectively electrically connected to the first radiator 11 or/and the second radiator 12 . It can be understood that the antenna device 100 is applied to a mobile terminal, and the mobile terminal may be a mobile phone, a tablet computer, or a notebook computer.

In this embodiment, both the first radiator 11 and the second radiator 12 may be made of copper foil. The first radiator 11 and the second radiator 12 may be arranged on the main board of the mobile terminal. Specifically, both the first radiator 11 and the second radiator 12 may be excited by the feeding signal to radiate electromagnetic waves after receiving the feeding signal. Utilizing that the shape and structure of the first radiator 11 is different from the shape and structure of the second radiator 12, the first radiator 11 and the second radiator 12 are connected to the feeding signal respectively. The electromagnetic waves generated are different from each other. The first radiator 11 can generate high frequency resonance, and the second radiator 12 can generate low frequency resonance. It can be understood that different feeding signals are fed into the first radiator 11 and the second radiator 12 respectively, so that the first radiator 11 can constitute a main collector radiator, and the second radiator The body 12 can constitute a diversity radiator, so that the first radiator 11 can be responsible for sending or receiving electromagnetic waves, while the second radiator 12 is only responsible for receiving electromagnetic waves, so that the second radiator 12 assists the first radiation Body 11 works. In other embodiments, the first radiator 11 and the second radiator 12 can also be made of other conductive metals; the shape structure of the first radiator 11 and the shape structure of the second radiator 12 The same setting can also be used, different resonance frequencies are generated by different feed signals received by the first radiator 11 and the second radiator 12 , and different communication modes are formed.

In this embodiment, the first feeding end 21 , the second feeding end 22 and the third feeding end 23 serve as feeding output ports of the feeding source 20 . The first feeding end 21 , the second feeding end 22 and the third feeding end 23 may send out the same or different feeding signals. Specifically, the first feeding end 21 can feed a feeding signal to the first radiator 11, so that the first radiator 11 can receive the feeding signal excitation through the first feeding end 21 , so that the first radiator 11 and the first feeding end 21 form a first antenna branch. And the second feeding end 22 can feed the feeding signal to the second radiator 12, so that the second radiator 12 can receive the feeding signal excitation through the second feeding end 22, so that The second radiator 12 and the second feeding end 22 form a second antenna branch. The third feeding end 23 is selectively electrically connected to the first radiator 11 or/and the second radiator 12 . That is, the third feeding end 23 is electrically connected to the first radiator 11 and the second radiator 12 through a logic element, and the logic element can realize the connection between the third feeding end 23 and the first radiator 11. conduction or disconnection, and can realize the conduction or disconnection between the third feeding end 23 and the second radiator 12 . It can be understood that the logic element may be a switch, a logic circuit, a variable capacitor or a variable resistor. The third feed-in terminal 23 can be used to feed a feed signal to the first radiator 11, or to the second radiator 12, or to the second radiator 12 at the same time. A radiator 11 and the second radiator 12 are fed with feed signals. That is, the first radiator 11 and the third feeding end 23 may form a fourth antenna branch, the second radiator 12 and the third feeding end 23 may form a fifth antenna branch, and the first A radiator 11 , the second radiator 12 and the third feeding end 23 together form a sixth antenna branch. Certainly, when the feed signal sent by the third feed end 23 is the same as the feed signal sent by the first feed end 21 , the fourth antenna branch may be the same as the first antenna branch. When the feed signal sent by the third feed end 23 is the same as the feed signal sent by the second feed end 22 , the fifth antenna branch is the same as the second antenna branch. Using the three feeding ends 23 to switch conduction with the first radiator 11 and the second radiator 12, so that the antenna device 100 can present a variety of antenna branches, so that the antenna device 100 There are many different antenna structures, so as to improve the antenna performance of the antenna device 100 .

Further, the antenna device 100 further includes a switch assembly 40 , and the third feeding end 23 is electrically connected to the first radiator 11 or/and the second radiator 12 via the switch assembly 40 .

In this embodiment, the switch assembly 40 is arranged on the line connecting the first radiator 11 and the third feed-in terminal 23 , and on the line connecting the second radiator 12 and the third feed-in terminal 23 . On the line of input terminal 23. The switch component 40 can be responsible for the first radiator 11 and the third feed terminal 23 to be turned on or off, and the switch component 40 can also be responsible for the second radiator 12 and the third feed terminal 23. The input 23 is turned on or off. Of course, in other implementation manners, the switch assembly 40 can also be replaced by a logic circuit, or by setting a variable capacitor or a variable capacitor between the first radiator 11 and the third feed-in terminal 23 The resistance makes the first radiator 11 and the third feed-in terminal 23 conduct or disconnect; it is also possible to set a variable capacitor between the second radiator 12 and the third feed-in terminal 23 Or the variable resistance makes the second radiator 12 and the third feeding end 23 conduct or disconnect.

Further, please refer to FIG. 2 , the switch assembly 40 includes a first switch 41 and a second switch 42, the first switch 41 is electrically connected to the first radiator 11 and the third feeding end 23, The second switch 42 is electrically connected to the second radiator 12 and the third feeding end 23 .

In this embodiment, the first switch 41 includes a first moving contact 411 and a first static contact 412 . The first moving contact 411 is electrically connected to the first radiator 11 , and the first static contact 412 is electrically connected to the third feeding end 23 . When the first moving contact 411 is in contact with or separated from the first stationary contact 412 , the first radiator 11 is connected to or disconnected from the third feeding end 23 . The second switch 42 includes a second moving contact 421 and a second static contact 422 . The second moving contact 421 is electrically connected to the second radiator 12 , and the second static contact 422 is electrically connected to the third feeding end 23 . When the second moving contact 421 contacts or separates from the second stationary contact 422 , the second radiator 12 is connected to or disconnected from the third feed-in terminal 23 . It can be understood that both the first movable contact 411 of the first switch 41 and the second movable contact 421 of the second switch 42 can be controlled by the central processing unit of the mobile terminal, that is, the central processing unit sends The first switch 41 or/and the second switch 42 send instructions to control the third feeding end 23 to conduct with the first radiator 11 or/and the second radiator 12 . In other implementation manners, the first moving contact 411 , the first stationary contact 412 , the second moving contact 421 and the second stationary contact 422 can all be replaced by logic circuits.

Further, please refer to FIG. 3 , the first switch 41 is a single-pole double-throw switch, and the first switch 41 is also electrically connected to the first feed-in terminal 23 . Specifically, the first switch 41 further includes a third static contact 413 electrically connected to the first feeding end 21 . When the first moving contact 411 is in contact with the third static contact 413, the first radiator 11 conducts with the first feeding end 21 through the first switch 41, so that the The first radiator 11 and the first feeding end 21 still maintain the first antenna branch structure.

Further, the second switch 42 is a single pole double throw switch, and the second switch 42 is also electrically connected to the second feeding end 22 . Specifically, the second switch 42 further includes a fourth static contact 423 electrically connected to the second feeding end 21 . When the second moving contact 421 is in contact with the fourth static contact 423, the second radiator 12 conducts with the second feeding end 22 through the second switch 42, so that the A conduction line is added between the second radiator 11 and the first feed-in terminal 22 , so that the second antenna branch remains unchanged between the second feed-in terminal 22 and the second radiator 12 .

Further, please refer to FIG. 4 , the feed source 20 includes a first feed circuit 31, and the first feed circuit 31 is electrically connected to the first feed end 21, or the second feed end 22 or the first feed end 22 or the second feed end 22. Three feed-in terminals 23 .

In this embodiment, the first feeding circuit 31 is a main radio frequency path. The first feeding circuit 31 can implement the transmission of feeding signals and the main set of receiving signals. When the first feeding circuit 31 is connected to the first radiator 11 , the first radiator 11 may constitute a main antenna of the antenna device 100 . When the first feeding circuit 31 is connected to the second radiator 12 , the second radiator 12 can constitute the main antenna of the antenna device 100 . When the first feeding circuit 31 is simultaneously connected to the first radiator 11 and the second radiator 12 via the third feeding terminal 23, the first radiator 11 and the second radiator The radiator 12 together constitutes the main antenna of the antenna device 100 . Using the first feed circuit 31 to conduct with the first radiator 11 and the second radiator 12 respectively, and conduct with the first radiator 11 and the second radiator 12 at the same time, Therefore, the antenna device 100 can present three different main antenna communication modes.

Further, the feed source 20 also includes a second feed circuit 32, the second feed circuit 32 is electrically connected to the first feed end 21, or the second feed end 22 or the third feed end twenty three.

In this embodiment, the second feeding circuit 32 is a diversity receiving path. The second feed circuit 32 can realize signal diversity reception. When the second feeding circuit 32 is connected to the first radiator 11 , the first radiator 11 can constitute a diversity antenna of the antenna device 100 . When the second feeding circuit 32 is connected to the second radiator 12 , the second radiator 12 can constitute a diversity antenna of the antenna device 100 . When the second feeding circuit 32 is simultaneously connected to the first radiator 11 and the second radiator 12 via the third feeding terminal 23, the first radiator 11 and the second The radiator 12 together constitutes a diversity antenna of the antenna device 100 . Using the second feed circuit 32 to conduct with the first radiator 11 and the second radiator 12 respectively, and conduct with the first radiator 11 and the second radiator 12 at the same time, Therefore, the antenna device 100 can exhibit three differently formed diversity antenna communication modes.

Further, the feed source 20 also includes a double-pole three-throw switch 33, one end of the double-pole three-throw switch 33 is electrically connected to the first feed circuit 31 and the second feed circuit 32, and the other end Electrically connected to the first feeding end 21 , the second feeding end 22 and the third feeding end 23 .

In this embodiment, the double-pole three-throw switch 33 includes a third movable contact 331 and a fourth movable contact 332 electrically connected to the first feed circuit 31 and the second feed circuit 32 respectively, so The double-pole three-throw switch 33 also includes a fifth static contact 333 and a sixth static contact 334 electrically connected to the first feeding end 21, the second feeding end 22 and the third feeding end 23 respectively. and the seventh static contact 335 . The third moving contact 331 and the fourth moving contact 332 are switched between the fifth fixed contact 333 , the sixth fixed contact 334 and the seventh fixed contact 335 , so that the first The feed circuit 31 and the second feed circuit 32 are conducted in two phases between the first feed end 21 , the second feed end 22 and the third feed end 23 . That is, using the double-pole three-throw switch 33 in conjunction with the first feed circuit 31 and the second feed circuit 32 to conduct with the first radiator 11 or/and the second radiator 12 respectively, This allows the antenna device 100 to exhibit six different working states. In other implementation manners, the double pole three throw switch 33 may also be replaced by a logic circuit.

Specifically, a first communication mode of the antenna device 100 is provided. As shown in Figure 5, the first moving contact 411 of the first switch 41 is in contact with the third static contact 413, and the second moving contact 421 of the second switch 42 is in contact with the fourth static contact. Head 423 contacts. The third moving contact 331 is in contact with the fifth static contact 333 , and the fourth moving contact 332 is in contact with the sixth static contact 334 . Thus, the first radiator 11 is connected to the first feed circuit 31 through the first feeding end 21, and the second radiator 21 is connected to the first feeding circuit 31 through the second feeding end 22. The two feeding circuits 32 are turned on. The first radiator 11 receives the feed signal of the main radio frequency path of the first feed circuit 31 , and the second radiator 12 receives the feed signal of the diversity receive path of the second feed circuit 32 . The first radiator 11 is a main antenna radiator, and the second radiator 12 is a diversity antenna radiator. When the antenna device 100 is applied to a mobile terminal, the first radiator 11 of the antenna device 100 may be a GSM (Global System for Mobile Communication, Global System for Mobile Communication) channel port of a mobile phone. The second radiator may be a DCS (Distributed Control System, Distributed Control System) channel port serving as a mobile phone.

A second communication mode of the antenna device 100 is provided. As shown in Figure 6, the first moving contact 411 of the first switch 41 is in contact with the third static contact 413, and the second moving contact 421 of the second switch 42 is in contact with the fourth static contact. Head 423 contacts. The third moving contact 331 is in contact with the sixth static contact 334 , and the fourth moving contact 332 is in contact with the fifth static contact 333 . Thus, the first radiator 11 is connected to the second feed circuit 32 through the first feed-in terminal 21, and the second radiator 21 is connected to the first feed-in circuit 32 through the second feed-in terminal 22. A feeder circuit 31 is turned on. The first radiator 11 receives the diversity receiving channel feed signal of the second feed circuit 32 , and the second radiator 12 receives the main radio frequency feed signal of the first feed circuit 31 . The first radiator 11 is a diversity antenna radiator, and the second radiator 12 is a main antenna radiator. When the antenna device 100 is applied to a mobile terminal, the first radiator 11 of the antenna device 100 may serve as a DCS channel port of a mobile phone. The second radiator can be used as a GSM channel port of a mobile phone.

A third communication mode of the antenna device 100 is provided. As shown in Figure 7, the first moving contact 411 of the first switch 41 is in contact with the first static contact 412, and the second moving contact 421 of the second switch 42 is in contact with the second static contact. The head 422 contacts. The third moving contact 331 is in contact with the fifth static contact 333 , and the fourth moving contact 332 is in contact with the seventh static contact 335 . Therefore, the first feed circuit 31 feeds the main set radio frequency path feed signal to the first radiator 11 through the first feed end 21, so that the first radiator 11 forms a main set antenna radiation body. The second feed circuit 32 simultaneously feeds the diversity reception path feed signal to the first radiator 11 and the second radiator 12 through the third feed terminal 23, so that the first radiator 11 and the second radiator 12 together form a diversity antenna radiator. When the antenna device 100 is applied to a mobile terminal, the first radiator 11 of the antenna device 100 may serve as a GSM channel port of a mobile phone. The first radiator 11 and the second radiator 12 may serve as DCS channel ports of the mobile phone together.

A fourth communication mode of the antenna device 100 is provided. As shown in Figure 8, the first moving contact 411 of the first switch 41 is in contact with the first static contact 412, and the second moving contact 421 of the second switch 42 is in contact with the second static contact. The head 422 contacts. The third moving contact 331 is in contact with the seventh static contact 335 , and the fourth moving contact 332 is in contact with the fifth static contact 333 . Therefore, the first feeding circuit 31 simultaneously feeds the main set radio frequency channel feeding signal to the first radiator 11 and the second radiator 12 through the third feeding terminal 23, so that the first A radiator 11 and the second radiator 12 together constitute a main antenna radiator. The second feeding circuit 32 feeds a diversity receiving path feeding signal to the first radiator 11 through the first feeding terminal 21 , so that the first radiator 11 constitutes a diversity antenna radiator. When the antenna device 100 is applied to a mobile terminal, the first radiator 11 and the second radiator 12 of the antenna device 100 may serve as a GSM channel port of a mobile phone. The first radiator 11 is used as a DCS channel port of the mobile phone.

A fifth communication mode of the antenna device 100 is provided. As shown in Figure 9, the first moving contact 411 of the first switch 41 is in contact with the first static contact 412, and the second moving contact 421 of the second switch 42 is in contact with the second static contact. The head 422 contacts. The third moving contact 331 is in contact with the seventh static contact 335 , and the fourth moving contact 332 is in contact with the sixth static contact 334 . Therefore, the first feeding circuit 31 simultaneously feeds the main set radio frequency channel feeding signal to the first radiator 11 and the second radiator 12 through the third feeding terminal 23, so that the first A radiator 11 and the second radiator 12 together constitute a main antenna radiator. The second feeding circuit 32 feeds a diversity receiving path feeding signal to the second radiator 12 through the second feeding terminal 22 , so that the second radiator 12 constitutes a diversity antenna radiator. When the antenna device 100 is applied to a mobile terminal, the first radiator 11 and the second radiator 12 of the antenna device 100 may serve as a GSM channel port of a mobile phone. The second radiator 12 is used as a DCS channel port of the mobile phone.

A sixth communication mode of the antenna device 100 is provided. As shown in Figure 10, the first moving contact 411 of the first switch 41 is in contact with the first static contact 412, and the second moving contact 421 of the second switch 42 is in contact with the second static contact. The head 422 contacts. The third moving contact 331 is in contact with the sixth static contact 334 , and the fourth moving contact 332 is in contact with the seventh static contact 335 . Therefore, the first feed circuit 31 feeds the main set radio frequency path feed signal to the second radiator 12 through the second feed end 22, so that the second radiator 12 forms a main set antenna radiation body. The second feed circuit 32 simultaneously feeds the diversity reception path feed signal to the first radiator 11 and the second radiator 12 through the third feed terminal 23, so that the first radiator 11 and the second radiator 12 together form a diversity antenna radiator. When the antenna device 100 is applied to a mobile terminal, the second radiator 12 of the antenna device 100 can be used as a GSM channel port of a mobile phone. The first radiator 11 and the second radiator 12 together serve as a DCS channel port of the mobile phone.

Of course, in other embodiments, it is also possible that the first radiator 11 is connected to the third feed-in terminal 23 through the first switch 41, and the second radiator 11 is connected through the second The switch 32 is disconnected from the third feed-in terminal 23, and the first feed-in circuit 31 and the second feed-in circuit 32 pass through the first feed-in terminal 21 and the third feed-in terminal 23 respectively. Commonly feed the feed signal to the first radiator 11; or the first radiator 11 is disconnected from the third feeding end 23 through the first switch 41, and the second radiator 11 is connected to the third feeding terminal 23 via the second switch 32, and the first feeding circuit 31 and the second feeding circuit 32 are respectively connected to the The third feeding end 33 commonly feeds a feeding signal to the second radiator 12 . Thus, the communication modes of the antenna device 100 are increased.

1 and 11, the present invention also provides a mobile terminal 200, the mobile terminal 200 includes a control circuit 50 and the above-mentioned antenna device 100, the control circuit 50 is electrically connected to the antenna device 100 to control The antenna device 100 operates, and processes the sending and receiving signals of the antenna device 100 .

In this implementation manner, the control circuit 50 may be disposed on the main board of the mobile terminal 200 . The control circuit 50 is electrically connected to the first switch 41, the second switch 42 and the double-pole three-throw switch 33 of the antenna device 100 to control the first switch 41, the second switch 42 and the double-pole The three-throw switch 33 is turned off or turned on, so that the antenna device 100 can switch to a variety of different communication modes according to the control instruction of the control circuit 50 . It can be understood that the mobile terminal 200 refers to computer equipment that can be used on the move, including but not limited to mobile phones, notebooks, tablet computers, POS machines, vehicle-mounted computers, cameras, and the like.

In the antenna device and the mobile terminal of the present invention, the feeding source is provided with a first feeding end, a second feeding end and a third feeding end, and the first feeding end and the second feeding end are respectively It is always connected with the first radiator and the second radiator, so that the first radiator and the second radiator can pass through the first feed-in port and the second feed-in port respectively. The input end maintains regular communication; use the first radiator or/and the second radiator to electrically connect the third feed end, that is, the user can select the third feed end to be in the first switch between the radiator and/or the second radiator. Therefore, the antenna device can add communication modes to make signal adjustments, and then can cope with various changing external environments and improve communication performance.

The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

Claims (10)

1. An antenna device, characterized in that, the antenna device includes a radiation assembly and a feed source, the radiation assembly includes a first radiator and a second radiator, and the feed source is provided with a first feed-in terminal, a second Two feed-in terminals and a third feed-in terminal, the first feed-in terminal and the second feed-in terminal are respectively electrically connected to the first radiator and the second radiator, and the third feed-in terminal Optionally electrically connected to the first radiator or/and the second radiator. 2. The antenna device according to claim 1, wherein the antenna device further comprises a switch assembly, and the third feeding end is electrically connected to the first radiator or/and the second radiator. 3. The antenna device according to claim 2, wherein the switch assembly comprises a first switch and a second switch, the first switch is electrically connected to the first radiator and the third feed end, the second switch is electrically connected to the second radiator and the third feeding end. 4. The antenna device according to claim 3, wherein the first switch is a single-pole double-throw switch, and the first switch is also electrically connected to the first feed-in terminal. 5 . The antenna device according to claim 3 , wherein the second switch is a single pole double throw switch, and the second switch is also electrically connected to the second feeding end. 6. The antenna device according to any one of claims 1-5, wherein the feed source comprises a first feed circuit, the first feed circuit is electrically connected to the first feed end, Or the second feed end or the third feed end. 7. The antenna device according to claim 6, wherein the first feeding circuit is a main radio frequency path. 8. The antenna device according to claim 6, wherein the feed source includes a second feed circuit, and the second feed circuit is electrically connected to the first feed end or the second feed end terminal or the third feed terminal. 9. The antenna device according to claim 8, wherein the second feeding circuit is a diversity receiving path. 10. A mobile terminal, characterized in that the mobile terminal comprises the antenna device according to any one of claims 1-9.