CN112467372B - Antenna system, mobile terminal and signal transmission method - Google Patents

Abstract

The present application provides an antenna system, a mobile terminal and a signal transmission method, and relates to the field of communication technologies, which can reduce the directivity of the antenna and optimize the signal transmission performance of the antenna. The antenna system includes a first antenna, a feeding path of the first antenna, a second antenna, a feeding path of the second antenna, and a second on-off circuit; the first antenna is located on the first side of the casing of the mobile terminal, The second side or the top corner area where the first side and the second side are connected, the feed path connecting the first antenna and the first antenna, the first side and the second side are the two adjacent sides on the housing; The two antennas are located on the second side, the second on-off circuit is connected in series between the second antenna and the feed path of the second antenna, and the second on-off circuit is used to work on the first antenna and the second antenna does not work , disconnect the connection between the second antenna and the feed path of the second antenna.

Description

Antenna system, mobile terminal and signal transmission method

technical field

The present application relates to the field of communication technologies, and in particular, to an antenna system, a mobile terminal, and a signal transmission method.

Background technique

For the antenna system on the mobile terminal, the radiation pattern of the antenna is an important indicator that affects the signal transmission performance of the antenna. The size of the antenna set on the mobile terminal is usually small, and the radiation direction of the antenna is easily affected by the floor of the mobile terminal. As a result, the directivity of the radiation direction of the antenna is often relatively high, and the signal transmission performance is poor.

SUMMARY OF THE INVENTION

The present application provides an antenna system, a mobile terminal and a signal transmission method, which can reduce the directivity of the antenna and optimize the signal transmission performance of the antenna.

In a first aspect, the present application provides an antenna system, comprising a first antenna, a feed path of the first antenna, a second antenna, a feed path of the second antenna, and a second on-off circuit, the first antenna and the second The working frequency band of the antenna is 2.4GHz or 5GHz; the first antenna is located on the first side, the second side or the vertex area where the first side and the second side are connected to the casing of the mobile terminal. The feeding path of the antenna is connected, and the first side and the second side are the two adjacent sides on the casing; the second antenna is located on the second side, and the second on-off circuit is connected in series with the feeder of the second antenna and the second antenna. Between the electrical paths, the second on-off circuit is used for disconnecting the connection between the second antenna and the feeding path of the second antenna when the first antenna is working and the second antenna is not working.

In the antenna system provided by the present application, when the first antenna works and the second antenna does not work, the connection between the second antenna and the feed path of the second antenna is disconnected, so as to change the time when the first antenna sends and receives signals. Therefore, the directivity of the first antenna is reduced, and the signal transmission performance of the first antenna is optimized.

Optionally, the second on-off circuit is further configured to turn on the connection between the second antenna and the feed path of the second antenna when the second antenna is working.

Optionally, the length of the first side edge is smaller than the length of the second side edge.

Based on this optional method, the mobile terminal can ensure that the used antenna has a low directivity in both the portrait mode and the landscape mode, so as to ensure the signal transmission performance.

Optionally, when the first antenna is located on the first side, the casing is etched with a first slit near the first side, one end of the first slit is open on the first side, and the other end of the first slit is grounded. , forming a first antenna; connecting the first antenna with the feed path of the first antenna includes: connecting the other end of the first slot with the feed path of the first antenna.

Optionally, when the first antenna is located on the second side, the casing is etched with a first slit near the second side, one end of the first slit is open on the second side, and the other end of the first slit is grounded. , forming a first antenna; connecting the first antenna with the feed path of the first antenna includes: connecting the other end of the first slot with the feed path of the first antenna.

Optionally, the antenna system further includes a first on-off circuit; the first on-off circuit is connected in series between the other end of the first slot and the feed path of the first antenna, and the first on-off circuit is used for When the two antennas are working and the first antenna is not working, the connection between the first antenna and the feed path of the first antenna is disconnected.

Based on this optional method, when the second antenna is working and the first antenna is not working, the connection between the first antenna and the feed path of the first antenna is disconnected, so as to change the current when the second antenna sends and receives signals distribution, thereby reducing the directivity of the second antenna and optimizing the signal transmission performance of the second antenna.

Optionally, when the first antenna is located in the vertex area, the vertex area is etched with a first slit, one end of the first slit is opened on the first side or the second side, and the other side of the first slit is opened. One end is grounded to form a first antenna; the first antenna is connected to the feed path of the first antenna, including: the other end of the first slot is connected to the feed path of the first antenna.

Optionally, a second slit is etched on the casing near the second side, one end of the second slit is open on the second side, and the other end of the second slit is grounded to form a second antenna; The circuit is connected in series between the other end of the second slot and the feed path of the second antenna.

In a second aspect, the present application provides a mobile terminal, including at least one antenna system according to the first aspect, where the antenna system is used for the mobile terminal to send and receive signals.

In a third aspect, the present application provides a signal transmission method, which is applied to the mobile terminal according to the second aspect. The antenna system of the mobile terminal includes a first antenna, a feed path of the first antenna, a second antenna, and a second antenna. The feed path and the second on-off circuit of the mobile terminal, the working frequency band of the first antenna and the second antenna is 2.4GHz or 5GHz; the first antenna is located on the first side, the second side or the first side of the casing of the mobile terminal In the vertex area where the side is connected with the second side, the first antenna is connected with the feed path of the first antenna, the first side and the second side are the two adjacent sides on the casing; the second antenna is located on the second side , the second on-off circuit is connected in series between the second antenna and the feed path of the second antenna; the method includes: when the mobile terminal determines to use the first antenna to send and receive signals and does not use the second antenna to send and receive signals, the mobile terminal Disconnect the second on-off circuit; the mobile terminal uses the first antenna to send and receive signals.

Optionally, the antenna system further includes a first on-off circuit, the first on-off circuit is connected in series between the first antenna and the feed path of the first antenna; disconnecting the second on-off circuit by the mobile terminal includes: moving the The terminal turns off the second on-off circuit and turns on the first on-off circuit; when the mobile terminal determines to use the second antenna to send and receive signals and does not use the first antenna to send and receive signals, the mobile terminal turns on the first on-off circuit circuit and disconnect the second on-off circuit.

Using the signal transmission method provided by the present application, the mobile terminal can disconnect the connection between the second antenna and the feed path of the second antenna under the condition that the first antenna is used to send and receive signals, and the second antenna is not used to send and receive signals. , so as to change the current distribution when the first antenna sends and receive signals, thereby reducing the directivity of the first antenna and optimizing the signal transmission performance of the first antenna.

Description of drawings

FIG. 1 is a schematic structural diagram 1 of an antenna system provided by the application;

FIG. 2 is a second schematic structural diagram of an antenna system provided by the application;

FIG. 3 is a third schematic structural diagram of an antenna system provided by the application;

4 is a schematic diagram of a current simulation provided by the application;

Fig. 5 is a kind of electric field simulation schematic diagram provided by this application;

6 is a schematic diagram of a radiation direction simulation provided by the application;

Fig. 7 is the schematic diagram of a kind of hand holding provided by this application;

FIG. 8 is a fourth schematic structural diagram of an antenna system provided by the application;

FIG. 9 is a fifth structural schematic diagram of an antenna system provided by the application;

10 is a schematic structural diagram of another antenna system provided by the application;

11 is a schematic structural diagram of a mobile terminal provided by the application;

FIG. 12 is a schematic flowchart of a signal transmission method provided by the present application.

Detailed ways

Before introducing the embodiments of the antenna system, mobile terminal and signal transmission method provided in this application, it should be noted that when this application refers to ordinal numbers such as "first", "second" or "third", unless It does express the meaning of the order according to the context, otherwise it should be understood that it is only for the purpose of distinction.

In the description of this application, the words "exemplary" or "such as" are used to mean serving as an example, illustration, or illustration. Any implementation or design described in the examples herein as "exemplary" or "such as" should not be construed as preferred or advantageous over other implementations or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

Unless otherwise specified, "/" herein generally means that the contextual object is an "or" relationship, for example, A/B can mean A or B. The term "and/or" is only an association relationship to describe related objects, indicating that there can be three kinds of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist simultaneously, and B exists alone. a situation. In addition, in the description of the present application, "plurality" means two or more.

The antenna system provided in the present application is an antenna system provided in a mobile terminal and including at least two antennas. For example, the mobile terminal can be enabled to implement a wireless fidelity (WiFi) antenna system, a long term evolution (LTE) antenna system and the like that realize multiple-input multiple-output (MIMO) communication. The mobile terminal may be a mobile phone, a mobile computer, a tablet computer, a wearable device, or the like.

Each antenna in the antenna system is generally disposed on the casing of the mobile terminal, and the feed path of each antenna is generally disposed in the control module of the mobile terminal (eg, an integrated circuit board wrapped in the casing in the mobile terminal).

The working frequency band of each antenna in the antenna system may be 2.4GHz or 5GHz.

The antenna system provided by the present application will be exemplarily described below with reference to specific embodiments.

1-3 , which are schematic structural diagrams of an embodiment of an antenna system provided by the present application. The antenna system includes a first antenna 10 , a feed path 11 of the first antenna, a second antenna 12 , and a feed of the second antenna. Via 13 and second on-off circuit 14 .

The first antenna 10 can be located on the first side 150 (as shown in FIG. 1 ) of the casing 15 of the mobile terminal, or on the second side 151 (as shown in FIG. 2 ), or on the first side 150 and the second side 151 . In the vertex area 152 connected by the side edge 151 (as shown in FIG. 3 ), the first antenna 10 is connected with the feeding path 12 of the first antenna.

The second antenna 13 is located on the second side 151 , and the second on-off circuit 14 is connected in series between the second antenna 12 and the feeding path 13 of the second antenna.

Wherein, the first side 150 and the second side 151 are adjacent two sides of the casing 15 .

The first antenna 10 and the second antenna 12 may be slot antennas or wire antennas, and the first antenna and the second antenna are deployed by etching a slot on the casing 15 . Exemplarily, the first antenna 10 and the second antenna 12 may be a typical Inverted-F Antenna (IFA) or a Planar Inverted-F Antenna (PIFA).

The casing 15 of the mobile terminal may be a metal casing or a non-metal casing. If the casing 15 is a metal casing, the gap between the first antenna and the second antenna can be directly etched at a designated position on the metal casing. If the casing 15 is a non-metal casing, such as a plastic casing, the antenna can be deployed by means of a bracket. That is, a metal patch is attached to the shadow position of the non-metallic shell, and then the gap between the first antenna and the second antenna is etched on the metal patch.

Exemplarily, as shown in FIG. 1 , when the first antenna 10 is deployed at the first side 150 , the first slit 101 may be etched on the housing 15 at a position close to the first side 150 . One end is opened on the first side 150 , and the other end of the first slot 101 is grounded to form the first antenna 10 .

Alternatively, as shown in FIG. 2 , when the first antenna 10 is deployed at the second side 151 , the first slit 101 may be etched on the housing 15 at a position close to the second side 151 , and one end of the first slit 101 is at The second side 151 is open, and the other end of the first slot 101 is grounded to form the first antenna 10 .

Alternatively, when the first antenna 10 is deployed in the vertex area 152, the first slit 101 may be etched in the vertex area 152, and one end of the first slit 101 may be opened on the first side 150, or as shown in FIG. 3 As shown, one end of the first slot 101 may also be opened on the second side 151 , and the other end of the first slot 101 is grounded to form the first antenna 101 .

The first antenna 10 is connected to the feed path 12 through the grounded end of the first slot 101 , so that the first antenna 10 realizes signal transmission and reception under the control of the feed path 11 .

Similarly, when the second antenna 12 is deployed at the second side 151 , the second slit 121 can be etched on the housing 15 near the second side 151 , and one end of the first slit 121 is at the second side 151 The upper opening is opened, and the other end of the second slot 121 is grounded to form the second antenna 12 . The second on-off circuit 14 is connected in series between the grounded end of the second slot 121 and the feeding path 13 .

It should be noted that when the first antenna 10 is located at the second side 151 or the vertex area 152, the first antenna 10 and the second antenna 12 are separated by a certain distance to ensure that the first antenna 10 and the second antenna 12 The isolation degree between them can avoid mutual interference when the first antenna 10 and the second antenna 12 work at the same time.

For example, if a button is provided on the second side 151, the first antenna 10 and the second antenna 12 may be located at two ends of the button, respectively

The distance between the first antenna 10 and the second antenna 12 and the size specifications of the first antenna 10 and the second antenna 12 can be set according to the actual required industrial design, which is not limited in this application.

In the present application, a second on-off circuit 14 is connected in series between the second antenna 12 and the feed path 13 , and the second on-off circuit 14 is used when the first antenna 10 is working and the second antenna 12 is not working , disconnect the connection between the second antenna 12 and the feed path 13 . When the second antenna 12 is in operation, the link between the second antenna 12 and the feed path 13 is turned on.

Wherein, the working of the antenna means that the mobile terminal uses the antenna to send and receive signals, and the fact that the antenna is not working means that the mobile terminal does not use the antenna to send and receive signals. That is to say, when the mobile terminal determines that the first antenna 10 is used to send and receive signals, and the second antenna 12 is not applicable to send and receive signals, the mobile terminal disconnects the second on-off circuit 14 . When it is determined that the second antenna 12 is used to send and receive signals, the second on-off circuit 14 is turned on, so that the second antenna 12 realizes signal sending and receiving under the control of the feed path 13 .

The second on-off circuit 13 may be a switching device, such as a single-pole/single-throw (SPST) switch. Alternatively, the second on-off circuit 13 may also be a component or device bonding circuit with on-off function.

When the second on-off circuit 13 is disconnected, the second antenna 12 forms a resonant structure with one end open and the other end grounded, which can change the current generated by the first antenna 10 when the first antenna 10 is working. current distribution in the mobile terminal, thereby improving the directivity of the first antenna 10 .

The following takes the first antenna 10 located in the vertex area 152 as an example, combined with the simulation example, to illustrate the influence of the current distribution and directivity of the first antenna 10 when the second on-off circuit 13 is off and on. instruction of.

Exemplarily, as shown in FIG. 4 , when the first antenna 10 is working, the second on-off circuit 13 is in an on state (as shown in FIG. 4( a )) and an off state (as shown in FIG. 4(b)) current simulation schematic diagram. In FIG. 4 , the area showing brightness is the current distribution in the mobile terminal of the current generated by the first antenna 12 when it is working. Based on the comparison between FIG. 4( a ) and FIG. 4( b ), it can be seen that the second on-off circuit 13 is located below the second antenna 12 in the disconnected state (as shown in FIG. The current out of the coil) is significantly reduced. Therefore, the resonant structure formed by the second antenna 12 effectively suppresses the downward flow of the current generated by the first antenna 10 during operation.

Correspondingly, as shown in FIG. 5 , when the first antenna 10 is working, the second on-off circuit 13 is in an on state (as shown in FIG. 5( a )) and an off state (as shown in FIG. 5(b)) of the electric field simulation schematic diagram. In FIG. 5 , an area with relatively strong brightness is presented, which is the distribution of the electric field generated by the first antenna 12 in the mobile terminal during operation. The electric field corresponds to the current. Based on the comparison between FIG. 5(a) and FIG. 5(b), it can be seen that the second on-off circuit 13 is located below the second antenna 12 in the off state (as shown in FIG. 5 ). The electric field strength of the first antenna 10 (the portion enclosed by the dotted circle below the second antenna 12) is significantly reduced. Therefore, the resonant structure formed by the second antenna 12 can effectively weaken the electric field strength of the first antenna 10 under the second antenna 12 .

The radiation patterns of the first antenna 10 and the second antenna 12 when the second on-off circuit 13 is in the on state and the off state, respectively, are exemplarily described below with reference to the schematic diagram of the radiation direction simulation shown in FIG. 6 .

FIG. 6( a ) is a radiation pattern of the first antenna 10 when the first antenna 10 is working, the second antenna 12 is not working, and the second on-off circuit 13 is disconnected. The maximum value of the directivity of the first antenna 10 is 3.1 dBi (dBi is a unit of power gain), and the minimum value is -23 dBi.

FIG. 6( b ) is a radiation pattern of the first antenna 10 when the first antenna 10 is working, the second antenna 12 is not working, and the second on-off circuit 13 is turned on. The maximum value of the directivity of the first antenna 10 is 4.9dBi, and the minimum value is -14dBi.

FIG. 6( c ) is a radiation pattern of the second antenna 12 when the first antenna 10 does not work, the second antenna 12 works, and the second on-off circuit 13 is on. The maximum value of the directivity of the second antenna 12 is 2.54dBi, and the minimum value is -31dBi.

It can be seen from FIG. 6 that in the antenna system provided by the embodiment of the present application, when the first antenna 10 is working and the second antenna 12 is not working, the second on-off circuit 13 is used to disconnect the second antenna 12 from the feed path The connection between 13 can reduce the directivity of the first antenna 10 and optimize the signal transmission performance of the first antenna 10 . Therefore, by using the antenna system provided by the embodiments of the present application, both the first antenna 10 and the second antenna 12 can have lower directivity when they work separately.

In one example, the length of the first side 150 on the housing 15 is less than the length of the second side 151 . That is, when the terminal device has the horizontal screen mode or the vertical screen mode, the antenna located on the relatively long side can be selected as the second antenna.

When the mobile terminal is a terminal device with a landscape mode and a portrait mode, such as a mobile phone or a tablet computer, since the mobile terminal is held in different ways in the landscape mode and the portrait mode, antennas at different positions are used. Send and receive signals.

Illustratively, take the first antenna 10 being located in the vertex area 152 as an example. In the portrait mode, the side of the mobile terminal is usually held, for example, as shown in FIG. 7( a ), the area framed by the dotted frame 701 . Therefore, the signal quality of the antenna located in the top corner area is better than that of the antenna located on the side. Then, in the vertical screen mode, the mobile terminal will use the first antenna 10 located in the top corner area 152 to transmit and receive signals. In the landscape mode, the top corner area of the mobile terminal is usually held, for example, as shown in FIG. 7( b ), the area framed by the dotted frame 702 . Therefore, the signal quality of the antennas located on the side is better than that of the antennas located in the corner area. Then, in the landscape mode, the mobile terminal will use the second antenna 12 located at the second side 12 to send and receive signals. Therefore, based on the antenna system provided by the embodiments of the present application, regardless of whether the mobile terminal works in the portrait mode or the landscape mode, the antenna used can be guaranteed to have low directivity to ensure signal transmission performance.

In one example, the antenna system provided by the present application may include multiple first antennas 10 corresponding to the second antennas 12 , that is, one second antenna 12 may improve the directivity of the multiple first antennas 10 . The plurality of first antennas 10 may all be located on the first side 150 , may all be located on the second side 151 , or may be located on the first side 150 , the second side 151 , and the first side 150 and the second side 150 , respectively. The apex area 152 between the side edges 151 . When the second antenna 12 is not working, the second on-off circuit 14 can be disconnected, so that no matter which first antenna 10 is working, it can reduce the direction to a certain extent based on the resonance structure formed by the second antenna 12 to improve transmission performance.

Exemplarily, as shown in FIG. 8 , it is assumed that the antenna system includes an antenna 80 , an antenna 81 , an antenna 82 and an antenna 83 . Wherein, due to the actual required industrial design, the antenna 80 is deployed on the side 840 of the mobile terminal casing 84, the antenna 81 is deployed on the side 840 of the mobile terminal casing 84 near the top corner area 841, and the antenna 82 is deployed on In the top corner area 841 of the mobile terminal casing 84 , the antenna 83 is disposed on the side 842 of the mobile terminal casing 84 . Although not shown, the feed paths of each antenna are provided in the control module 85 of the mobile terminal, and are connected to each antenna.

The antenna 80 can be used as the second antenna, and the on-off circuit 86 is connected in series between the antenna 80 and the feed path of the antenna 80 . The antenna 81 , the antenna 82 and the antenna 83 are all first antennas corresponding to the antenna 80 . Then, when the antenna 80 is not working, the on-off circuit 86 can be disconnected, so that no matter when any one or more of the antennas 81, 82 and 83 are working, the resonant structure formed by the antenna 80 can be used. , to a certain extent, reduce the directivity and improve the transmission performance.

In an example, when the first antenna 10 is located on the first side 150 or on the second side 151, a first on-off circuit can also be connected in series between the first antenna 10 and the feeding path 11 of the first antenna 16, for disconnecting the connection between the first antenna 10 and the feeding path 11 when the second antenna 12 is working and the first antenna 10 is not working. For example, taking the first antenna 10 located on the first side 150 as an example, based on FIG. 1 , the antenna system may be as shown in FIG. 9 , and the antenna system further includes a first on-off circuit 16 . It is connected in series between the first antenna 10 and the feeding path 11 .

When the first on-off circuit 16 is disconnected, the first antenna 10 forms a resonant structure with one end open and one end grounded, which can change the current distribution in the mobile terminal of the current generated by the second antenna 12 during operation, thereby reducing the second antenna The directivity of the second antenna 12 improves the transmission performance of the second antenna 12 .

In one example, the antenna system may also include more than one set of first and second antennas.

Exemplarily, as shown in FIG. 10 , it is assumed that the antenna system includes an antenna 100 , an antenna 101 , an antenna 102 and an antenna 103 . Wherein, due to the actual required industrial design, the antenna 100 is deployed in the vertex area 1041 of the mobile terminal casing 104 , the antenna 101 is deployed in the vertex area 1042 of the casing 104 , and the antenna 102 is deployed on the side 1043 of the casing 104 , the antenna 103 is deployed on the side 1044 of the housing 104 . Although not shown, the feed paths of each antenna are provided in the control module 105 of the mobile terminal, and are connected with each antenna.

At this time, the antenna 100 and the antenna 102 may be used as a group of the first antenna and the second antenna, wherein the antenna 100 is the first antenna and the antenna 102 is the second antenna. An on-off circuit 106 is connected in series between the antenna 102 and the feed path of the antenna 102 . When the antenna 102 is not working and the antenna 100 is working, the on-off circuit 106 can be turned off to improve the directivity of the antenna 100 .

Take the antenna 101 and the antenna 103 as another group of the first antenna and the second antenna, wherein the antenna 101 is the first antenna and the antenna 103 is the second antenna. An on-off circuit 107 is connected in series between the antenna 103 and the feed path of the antenna 103 . When the antenna 102 is not working and the antenna 101 is working, the on-off circuit 107 can be disconnected to improve the directivity of the antenna 101 .

An embodiment of the present application also provides a mobile terminal, including at least one antenna system provided by the embodiment of the present application, where the antenna system is used for the mobile terminal to send and receive signals. For example, as shown in FIG. 11 , two world systems are deployed on the mobile terminal, which are Antenna System 1 and Antenna System 2 respectively. The antenna system 1 and the antenna system 2 are used to provide the mobile terminal with functions of transmitting and receiving signals in different frequency bands. For example, the antenna system 1 is an LTE antenna system, and the antenna system 2 is a WiFi antenna system.

Referring to FIG. 12 , it is a flowchart of an embodiment of a signal transmission method provided by the present application, which is applied to the mobile terminal provided by the present application. Exemplarily, the method includes:

Step 1201, when the mobile terminal determines to use the first antenna to send and receive signals and does not use the second antenna to send and receive signals, the mobile terminal disconnects the second on-off circuit connected in series with the second antenna.

Wherein, the mobile terminal can judge whether to use the first antenna to send and receive signals and whether to use the second antenna to send and receive signals by checking the signal quality.

Step 1202, the mobile terminal uses the first antenna to send and receive signals.

By using the signal transmission method provided by the embodiment of the present application, the mobile terminal can use the first antenna to send and receive signals and not use the second antenna to send and receive signals, by disconnecting the feed path between the second antenna and the second antenna. so as to change the current distribution when the first antenna sends and receive signals, thereby reducing the directivity of the first antenna and optimizing the signal transmission performance of the first antenna.

It can be understood that, when the mobile terminal determines to use the second antenna to work, that is, when the mobile terminal determines to use the second antenna alone, or use the first antenna and the second antenna to send and receive signals at the same time, the on-off circuit can be turned on. , to ensure that the feed path of the second antenna can control the second antenna to send and receive signals.

Optionally, if the antenna system further includes a first on-off circuit, then when the mobile terminal determines to use the first antenna to send and receive signals and does not use the second antenna to send and receive signals, the mobile terminal needs to disconnect the second on-off circuit. circuit and turn on the first on-off circuit; when the mobile terminal determines to use the second antenna to send and receive signals and does not use the first antenna to send and receive signals, the mobile terminal turns on the first on-off circuit and disconnects the second on-off circuit circuit. Therefore, no matter which antenna is used to send and receive signals, another unused antenna can be used as a resonant structure to reduce the directivity of the antenna and optimize the signal transmission performance.

The specific embodiments described above further describe the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solution of the present invention shall be included within the protection scope of the present invention.

Claims (11)

1. An antenna system is characterized by comprising a first antenna, a feed path of the first antenna, a second antenna, a feed path of the second antenna and a second on-off circuit, wherein the working frequency bands of the first antenna and the second antenna are 2.4GHz or 5 GHz;

the first antenna is located on a first side edge, a second side edge or a vertex angle area where the first side edge is connected with the second side edge of a shell of the mobile terminal, the first antenna is connected with a feed circuit of the first antenna, and the first side edge and the second side edge are two adjacent edges on the shell;

the second antenna is located on the second side, the second disconnection circuit is connected in series between the second antenna and a feed path of the second antenna,

the second on-off circuit is used for disconnecting the second antenna from the feed path of the second antenna when the first antenna is used for transmitting and receiving signals and the second antenna is not used for transmitting and receiving signals, so that the current distribution of the current generated when the first antenna works in the mobile terminal is changed by the resonance structure formed by the second antenna, and the directivity of the first antenna is reduced.

2. The antenna system of claim 1, wherein the second opening circuit is further configured to open a connection between the second antenna and the feed path of the second antenna when the second antenna is operating.

3. The antenna system of claim 1, wherein the length of the first side is less than the length of the second side.

4. The antenna system of any of claims 1-3, wherein when the first antenna is located on the first side, the housing is etched with a first slot proximate to the first side, one end of the first slot being open on the first side, and the other end of the first slot being grounded to form the first antenna;

the first antenna is connected to a feed path of the first antenna, and includes:

the other end of the first slot is connected to a feed path of the first antenna.

5. The antenna system of any of claims 1-3, wherein when the first antenna is on the second side, the housing is etched with a first slot proximate the second side, one end of the first slot being open on the second side and the other end of the first slot being grounded to form the first antenna;

the first antenna is connected to a feed path of the first antenna, and includes:

the other end of the first slot is connected to a feed path of the first antenna.

6. The antenna system of claim 4, further comprising a first on-off circuit;

the first on-off circuit is connected in series between the other end of the first gap and the feed path of the first antenna, and the first on-off circuit is used for disconnecting the first antenna from the feed path of the first antenna when the second antenna works and the first antenna does not work.

7. The antenna system according to any one of claims 1 to 3, wherein when the first antenna is located in the vertex angle region, the vertex angle region is etched with a first slot, one end of the first slot is opened on the first side or the second side, and the other end of the first slot is grounded to form the first antenna;

the first antenna is connected to a feed path of the first antenna, and includes:

the other end of the first slot is connected to a feed path of the first antenna.

8. The antenna system according to any of claims 1-3, wherein a second slot is etched in the housing near the second side, one end of the second slot being open on the second side, and the other end of the second slot being grounded to form the second antenna;

the second disconnection circuit is connected in series between the other end of the second slot and the feed path of the second antenna.

9. A mobile terminal, characterized in that it comprises at least one antenna system according to any of claims 1-8, said antenna system being adapted to said mobile terminal for transceiving signals.

10. A signal transmission method is characterized in that an antenna system of a mobile terminal comprises a first antenna, a feed path of the first antenna, a second antenna, a feed path of the second antenna and a second on-off circuit, wherein the working frequency bands of the first antenna and the second antenna are 2.4GHz or 5 GHz; the first antenna is located on a first side edge, a second side edge or a vertex angle area where the first side edge is connected with the second side edge of a shell of the mobile terminal, the first antenna is connected with a feed circuit of the first antenna, and the first side edge and the second side edge are two adjacent edges on the shell; the second antenna is positioned on the second side, and the second on-off circuit is connected in series between the second antenna and a feed path of the second antenna; the method comprises the following steps:

when the mobile terminal determines to send and receive signals by using the first antenna and not to send and receive signals by using the second antenna, the mobile terminal disconnects the second on-off circuit so that the resonant structure formed by the second antenna changes the current distribution of the current generated when the first antenna works in the mobile terminal, and the directivity of the first antenna is reduced;

the mobile terminal transceives a signal using the first antenna.

11. The signal transmission method according to claim 10, wherein the antenna system further comprises a first switching circuit connected in series between the first antenna and a feed path of the first antenna; the disconnecting of the second disconnection circuit by the mobile terminal includes:

the mobile terminal disconnects the second on-off circuit and connects the first on-off circuit;

and when the mobile terminal determines to transmit and receive signals by using the second antenna and does not transmit and receive signals by using the first antenna, the mobile terminal switches on the first on-off circuit and switches off the second on-off circuit.

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