CN115020962B

CN115020962B - Antenna circuit and control method thereof

Info

Publication number: CN115020962B
Application number: CN202210946596.9A
Authority: CN
Inventors: 郝建东; 程黎辉; 关亚东
Original assignee: Longcheer Electronics Huizhou Co Ltd
Current assignee: Longcheer Electronics Huizhou Co Ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-11-22
Anticipated expiration: 2042-08-09
Also published as: CN115020962A

Abstract

The application provides an antenna circuit and a control method thereof. The antenna circuit includes: the device comprises a signal transceiving device, a three-pole three-throw switch, a first antenna, a second antenna, a third antenna and a control device. The first antenna is a lower antenna in the mobile terminal, the second antenna is an upper antenna in the mobile terminal, and the third antenna is a side antenna in the mobile terminal; the three-pole three-throw switch comprises a first selection end, a second selection end, a third selection end, a first data end, a second data end and a third data end; the first selection end, the second selection end and the third selection end are respectively connected with the signal receiving and transmitting device, the first data end is connected with the first antenna, the second data end is connected with the second antenna, and the third data end is connected with the third antenna; the control device is connected with the signal receiving and transmitting device. The antenna circuit can improve the production efficiency of the circuit board of the antenna circuit and save the production cost.

Description

Antenna circuit and control method thereof

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to an antenna circuit and a control method thereof.

Background

The existing mobile terminal usually defaults to transmit a signal by a lower antenna with higher signal strength, but in order to avoid the influence of strong signal radiation on the physical health of a user, the antenna for transmitting the signal is usually switched to a side antenna with lower signal strength when the signal strength of the lower antenna is detected to exceed a certain value.

In an antenna circuit of an existing mobile terminal, when the mobile terminal transmits a signal through a lower antenna, the signal transmitted by a radio frequency front end processor is transmitted to the lower antenna through a double-pole double-throw switch and then flows through the double-pole double-throw switch. When the mobile terminal transmits signals through the side antenna, the signals transmitted by the radio frequency front-end processor can directly flow to the side antenna after passing through the double-pole double-throw switch. In the process of printing the antenna circuit into the circuit board, because the components through which signals flow after the double-pole double-throw switch are different and the sizes of the components are different, the difference of two paths after the double-pole double-throw switch on the circuit board is larger, and the routing loss is different. In order to avoid the performance deterioration of the radio frequency signal, signal correctors are needed to be respectively arranged between the double-pole double-throw switch and the double-pole four-throw switch and between the double-pole double-throw switch and the side antenna so as to correct the signal. In the production process of the circuit board, the signal correctors on the two paths behind the double-pole double-throw switch need to be tested respectively, so that the signal compensation values corresponding to the signal correctors on the respective paths are determined.

When the circuit board of the antenna circuit is produced, the signal correctors on the path where the lower antenna is located and the path where the side antenna is located need to be tested respectively, so that corresponding signal compensation values are determined respectively, the production process of the circuit board is complex in operation and low in efficiency, and the production cost is increased.

Disclosure of Invention

The application provides an antenna circuit and a control method thereof, which are used for solving the technical problems of complex operation, low efficiency and high production cost in the production process of the antenna circuit board.

In a first aspect, the present application provides an antenna circuit comprising: the device comprises a signal transceiving device, a three-pole three-throw switch, a first antenna, a second antenna, a third antenna and a control device;

the first antenna is a lower antenna in the mobile terminal, the second antenna is an upper antenna in the mobile terminal, and the third antenna is a side antenna in the mobile terminal;

the three-pole three-throw switch comprises a first selection end, a second selection end, a third selection end, a first data end, a second data end and a third data end; the first selection end, the second selection end and the third selection end are respectively connected with the signal transceiver, the first data end is connected with the first antenna, the second data end is connected with the second antenna, and the third data end is connected with the third antenna;

the signal receiving and sending device is used for receiving a signal sent by the base station to the mobile terminal or sending the signal sent by the mobile terminal to the base station;

the control device is connected with the signal transceiving device and used for determining a transmitting antenna corresponding to the signal according to a mode of the signal transceiving device for transmitting the signal; determining an initial connection mode of the three-pole three-throw switch according to the transmitting antenna so that the signal can be transmitted to a base station through the transmitting antenna after being transmitted from the signal transceiving device;

the control device is further configured to determine whether to switch an initial connection mode of the three-pole three-throw switch according to a power value of a signal transmitted and received by a first antenna in the transmitting antenna after the signal is transmitted by the signal transceiver;

wherein, the initial connection mode is as follows: the first selection terminal and the second selection terminal are respectively conducted with the first data terminal, or the first selection terminal and the second selection terminal are respectively conducted with the first data terminal, and the first selection terminal and the second selection terminal are also respectively conducted with the third data terminal.

In one possible implementation, the method further includes: the first signal transmitting module is connected between the first selecting end and the signal transceiving device;

the first signal transmitting module comprises a first filtering device and a first signal correcting device, and the first filtering device is respectively connected with the signal transceiving device and the first signal correcting device;

the first signal transmitting module is used for transmitting the intermediate frequency signal sent by the signal receiving and transmitting device to a first selection end of the three-pole three-throw switch;

the first filtering device is used for filtering the intermediate frequency signal sent by the signal receiving and sending device;

the first signal correction device is used for correcting the signal processed by the first filtering device to a preset target signal.

In one possible embodiment, the method further comprises: the second signal transmitting module is connected between the second selecting end and the signal transceiving device;

the second signal transmitting module comprises a second filtering device, a third filtering device, a single-pole double-throw switch and a second signal correcting device; the single-pole double-throw switch comprises a first input end, a second input end and an output end; the first input end or the second input end is connected with or disconnected from the output end;

the second filtering device is respectively connected with the signal transceiver and the first input end, the third filtering device is respectively connected with the signal transceiver and the second input end, the output end is connected with the second signal correcting device, and the second signal correcting device is connected with the signal transceiver;

the second signal transmitting module is used for transmitting the high-frequency signal sent by the signal receiving and transmitting device to a second selection end of the three-pole three-throw switch;

the second filtering device is used for filtering the first high-frequency signal sent by the signal receiving and sending device; the third filtering device is used for filtering the second high-frequency signal sent by the signal transceiving device; wherein the first high-frequency signal is a B7 signal, and the second high-frequency signal is a B41 signal;

the single-pole double-throw switch is used for transmitting the signal processed by the second filtering device or the third filtering device to the second signal correcting device;

the second signal correction device is used for correcting the signal transmitted by the single-pole double-throw switch to a preset target signal.

In one possible embodiment, the method further comprises: a signal receiving module connected between the third selecting terminal and the signal transceiving device; the signal receiving module comprises a plurality of fourth filtering devices;

the signal receiving module is used for transmitting the signal received by the second antenna to the signal transceiving device;

the fourth filtering device is used for filtering the received corresponding signals.

In a second aspect, the present application provides a control method using the antenna circuit of the first aspect, the method including:

the control device determines a transmitting antenna corresponding to the signal according to the mode of the signal transmitting and receiving device for transmitting the signal;

determining an initial connection mode of the three-pole three-throw switch according to the transmitting antenna so that the signal can be transmitted to a base station through the transmitting antenna after being transmitted from the signal transceiving device;

after the signal transceiving device transmits signals, determining whether to switch the initial connection mode of the three-pole three-throw switch or not according to the power values of the signals transmitted and received by a first antenna in the transmitting antenna;

In a possible implementation manner, the determining, according to a mode of the signal transmitted by the signal transceiver, a transmitting antenna corresponding to the signal specifically includes:

determining whether the mode of the signal transmitting and receiving device for transmitting signals is a single-frequency-band mode or an aggregation mode;

if the mode of the transmitted signal is a single-frequency-band mode, the transmitting antenna corresponding to the signal is the first antenna;

if the mode of transmitting the signal is the aggregation mode, the transmitting antennas corresponding to the signal are the first antenna and the third antenna.

In a possible implementation manner, the determining an initial connection manner of the three-pole three-throw switch according to the transmitting antenna specifically includes:

if the transmitting antenna is the first antenna, controlling a first selection end and a second selection end in the three-pole three-throw switch to be respectively communicated with a first data end so that the signal can be transmitted to a base station through the first antenna after being transmitted from the signal transceiver;

if the transmitting antennas are the first antenna and the third antenna, the first selecting end and the second selecting end in the triple-pole triple-throw switch are controlled to be respectively conducted with the first data end, and the first selecting end and the second selecting end are also respectively conducted with the third data end, so that the signals can be transmitted to a base station through the first antenna and the third antenna respectively after being transmitted from the signal transceiving device.

In a possible implementation manner, the determining whether to switch the initial connection mode of the three-pole three-throw switch according to the power value of the transmission signal and the received signal of the first antenna in the transmission antenna specifically includes:

judging whether a first power value of the first antenna transmission signal is smaller than a first power threshold value;

if so, determining whether to switch the initial connection mode of the three-pole three-throw switch according to a second power value of the first antenna receiving signal;

if not, controlling a first selection end and a second selection end in the three-pole three-throw switch to be disconnected with a first data end respectively, and conducting the first selection end and the second selection end with a third data end respectively, or controlling the first selection end and the second selection end in the three-pole three-throw switch to be disconnected with the first data end respectively, so that a transmitting antenna corresponding to the signal is switched to the third antenna from the first antenna, or the first antenna and the third antenna are switched to the third antenna.

In a possible embodiment, the determining whether to switch the initial connection mode of the three-pole three-throw switch according to the second power value of the signal received by the first antenna specifically includes:

judging whether the second power value is larger than a second power threshold value;

if so, not switching the initial connection mode of the three-pole three-throw switch;

if not, controlling a first selection end and a second selection end in the triple-pole triple-throw switch to be respectively disconnected with a first data end, and respectively conducting the first selection end and the second selection end with a second data end, so that a transmitting antenna corresponding to the signal is switched from the first antenna to the second antenna, or switched from the first antenna and the third antenna to the second antenna and the third antenna.

In a possible implementation, when there is a high frequency signal in the signal transmitted by the signal transceiving means, the method further comprises:

judging whether the high-frequency signal is a first high-frequency signal or a second high-frequency signal, wherein the first high-frequency signal is a B7 signal, and the second high-frequency signal is a B41 signal;

if the high-frequency signal is a first high-frequency signal, controlling a first input end and an output end of the single-pole double-throw switch to be connected, and controlling a second input end and an output end to be disconnected, so that the first high-frequency signal is transmitted to a second selection end of the three-pole double-throw switch after being filtered by the second filtering device;

and if the high-frequency signal is a second high-frequency signal, controlling the first input end and the output end of the single-pole double-throw switch to be disconnected, and controlling the second input end and the output end to be connected, so that the second high-frequency signal is transmitted to the second selection end of the three-pole double-throw switch after being filtered by the third filtering device.

According to the antenna circuit and the control method thereof, the signal transceiving device is respectively connected with the first selection end, the second selection end and the third selection end of the three-pole three-throw switch, the first data end is connected with the first antenna, the second data end is connected with the second antenna, the third data end is connected with the third antenna, the first antenna is a lower antenna in the mobile terminal, the second antenna is an upper antenna in the mobile terminal, and the third antenna is a side antenna in the mobile terminal. In the antenna circuit of the present application, a double-pole four-throw switch in an existing antenna circuit is changed to a three-pole three-throw switch, and three data terminals of the three-pole three-throw switch are connected to three antennas, respectively. Therefore, the switching among the lower antenna, the side antenna and the upper antenna can be directly realized only by switching different connection modes of the three-pole three-throw switch, the switching of the antennas is realized without the matching mode of the two-pole two-throw switch and the two-pole four-throw switch, the line loss of the circuit board is reduced, and the occupied area of the switch of the circuit board is also saved. In addition, since the paths of signal transmission of different antennas are basically the same and the routing loss is basically the same before and after the antennas are switched by the three-pole three-throw switch, when the antenna circuit board is produced, a signal corrector does not need to be independently arranged for a side antenna circuit, only the signal corrector in front of the three-pole three-throw switch is reserved, a corrected signal is completed by the signal corrector, and can be directly transmitted to the corresponding antenna through the three-pole three-throw switch, and the signal correction is not needed to be carried out due to the switching of the antennas, so that the production cost of the antenna circuit board is saved. Correspondingly, when the antenna circuit is calibrated and tested to determine the specific signal compensation value of the signal corrector, the lower antenna circuit and the side antenna circuit do not need to be tested respectively to determine the signal compensation values corresponding to the two signal correctors on the lower antenna circuit and the side antenna circuit respectively. Through the arrangement, the production cost of the antenna circuit board is saved, the testing steps during production are reduced, the operation is simple and convenient, and the production efficiency of the antenna circuit board is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic diagram of an antenna circuit in the prior art;

fig. 2 is a schematic diagram of an antenna circuit according to an embodiment of the present application;

fig. 3 is a flowchart of a control method of an antenna circuit according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a control device of an antenna circuit according to an embodiment of the present application.

Reference numerals are as follows: 1. a signal transceiver; 2. a signal amplification module; 3. a first signal transmitting module; 4. a signal receiving module; 5. a second filtering means; 6. a third filtering means; 7. a double pole double throw switch; 8. a second signal correction device; 9. a double pole, four throw switch; 10. a third signal correction device; 11. a first antenna; 12. a second antenna; 13. a third antenna; 14. a single pole double throw switch; 141. a first input terminal; 142. a second input terminal; 143. an output end; 15. a three-pole, three-throw switch; 151. a first selection terminal; 152. a second selection terminal; 153. a third selection terminal; 154. a first data terminal; 155. a third data terminal; 156. and a third data terminal.

Specific embodiments of the present application have been shown by way of example in the drawings and will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims.

The terms referred to in this application are explained first:

the single-band mode refers to an operation mode in which a signal transmitted by the signal transceiver device is transmitted to the base station through only one antenna.

The aggregation mode, also called downlink CA, refers to an operation mode in which signals transmitted by the signal transceiver are transmitted to the base station through two antennas, respectively.

The antenna circuit can be applied to mobile terminals with 4G network functions, such as mobile phone, tablet, smart watch and other mobile terminal devices.

Fig. 1 is a schematic diagram of an antenna circuit in the prior art, and as shown in fig. 1, after a radio frequency front end processor (signal transceiver) 1 transmits a signal, the signal first enters a signal amplification module 2 for signal amplification processing, and then an intermediate frequency signal enters a first signal transmission module 3 for filtering processing, and then flows to a lower antenna 11 through a double-pole four-throw switch 9. The high frequency signal enters the second filter device 5 or the third filter device 6 for filtering processing, and then flows to the double-pole double-throw switch 7, and can flow to the side antenna 13 through the third signal correction device 10, or flow to the lower antenna 11 through the second signal correction device 8 and the double-pole four-throw switch 9. In addition, the signal received by the upper antenna 12 can flow to the signal receiving module 4 through the double-pole four-throw switch 9, and is finally transmitted to the radio frequency front end processor (signal transceiver module) 1.

In the process of printing the antenna circuit into the circuit board, because the components through which signals flow after the double-pole double-throw switch are different and the sizes of the components are different, the difference of two paths after the double-pole double-throw switch on the circuit board is larger, and the routing loss is different. In order to avoid the performance deterioration of the radio frequency signal, signal correctors are required to be respectively arranged between the double-pole double-throw switch and the double-pole four-throw switch and between the double-pole double-throw switch and the side antenna so as to correct the signal. In the production process of the circuit board, the signal correctors on the two paths behind the double-pole double-throw switch need to be tested respectively, so that the signal compensation values corresponding to the signal correctors on the respective paths are determined.

Based on the technical problem, the invention concept of the application is as follows: how to provide an antenna circuit, so as to enable the operation of the circuit board production of the antenna circuit to become simple and convenient and improve the production efficiency, and meanwhile, the production cost can be saved.

Specifically, different data ends of the three-pole three-throw switch are respectively connected with the lower antenna, the side antenna and the upper antenna, and the three-pole three-throw switch replaces a double-pole two-throw switch and a double-pole four-throw switch in the existing antenna circuit, so that the line loss of the circuit board is reduced, the occupied area of the switch of the circuit board is saved, and the production cost is saved. In addition, since the paths for transmitting different antenna signals are basically the same before and after the antenna is switched by using the three-pole three-throw switch, and the wiring loss is basically the same, when the antenna circuit board is produced, a signal corrector is not required to be independently arranged aiming at a side antenna circuit, only the signal corrector before the three-pole three-throw switch is reserved, a corrected signal is completed by the signal corrector, and can be directly transmitted to a corresponding antenna through the three-pole three-throw switch, and the signal correction is not required to be performed because of switching the antenna, so that the production cost of the antenna circuit board is saved. Correspondingly, when the antenna circuit is calibrated and tested to determine the specific signal compensation value of the signal corrector, the lower antenna circuit and the side antenna circuit do not need to be tested respectively to determine the signal compensation values corresponding to the two signal correctors on the lower antenna circuit and the side antenna circuit respectively. Through the arrangement, the production cost of the antenna circuit board is saved, the testing steps during production are reduced, the operation is simple and convenient, and the production efficiency of the antenna circuit board is improved.

The following describes the technical solution of the present application and how to solve the above technical problems in detail by specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

Example one

Fig. 2 is a schematic diagram of an antenna circuit according to an embodiment of the present application, and as shown in fig. 2, the antenna circuit may include: the antenna comprises a signal transceiving device 1, a three-pole three-throw switch 15, a first antenna 11, a second antenna 12, a third antenna 13 and a control device.

The first antenna 11 is a lower antenna in the mobile terminal, the second antenna 12 is an upper antenna in the mobile terminal, and the third antenna 13 is a side antenna in the mobile terminal.

The triple-pole triple-throw switch 15 comprises a first selection terminal 151, a second selection terminal 152, a third selection terminal 153, a first data terminal 154, a second data terminal 155 and a third data terminal 156; the first selection terminal 151, the second selection terminal 152 and the third selection terminal 153 are respectively connected to the signal transceiver 1, the first data terminal 154 is connected to the first antenna 11, the second data terminal 155 is connected to the second antenna 12, and the third data terminal 156 is connected to the third antenna 13.

The signal transceiver 1 is used for receiving a signal sent by a base station to a mobile terminal, or transmitting a signal sent by the mobile terminal to the base station.

The control device is connected with the signal transceiving device 1 and is used for determining a transmitting antenna corresponding to a signal according to a mode of the signal transceiving device 1 for transmitting the signal; and determines the initial connection mode of the three-pole three-throw switch 15 according to the transmitting antenna so that the signal can be transmitted to the base station through the transmitting antenna after being transmitted from the signal transceiving apparatus 1.

And the control device is also used for determining whether to switch the initial connection mode of the three-pole three-throw switch 15 or not according to the power value of the signal transmitted and received by the first antenna 11 in the transmitting antenna after the signal transmitting and receiving device 1 transmits the signal.

Wherein, the initial connection mode is as follows: the first selection terminal 151 and the second selection terminal 152 are respectively conducted with the first data terminal 154, or the first selection terminal 151 and the second selection terminal 152 are respectively conducted with the first data terminal 154, and the first selection terminal 151 and the second selection terminal 152 are also respectively conducted with the third data terminal 156.

In this embodiment, please refer to the second embodiment for the specific control manner of the control device.

In this embodiment, since strong signal radiation is usually only related to medium-high frequency signals, the switching of the antenna of the present application only relates to the lower antenna, the upper antenna and the side antenna related to medium-high frequency signals, that is, ANT1, ANT5 and ANT3, which are generally known to those skilled in the art.

In this embodiment, the first antenna 11 may be a lower antenna in the mobile terminal, which is located at the lower side of the mobile terminal, where the main signal is transmitted and the signal strength is relatively large; the second antenna 12 may be an upper antenna in the mobile terminal, which is located on the upper side of the mobile terminal, and the main signal is received, and the signal strength is also high; the third antenna 13 may be a side antenna in the mobile terminal, which is located on the left side or the right side of the mobile terminal and has a smaller signal strength. When the strength of the signal transmitted or received by the first antenna 11 or the second antenna 12 is too large, the signal transmitting antenna needs to be switched to the third antenna 13 to reduce the signal strength and avoid the influence of strong signal radiation on the physical health of the user.

In this embodiment, the signal transceiver 1 may be a radio frequency front end processor in a mobile terminal, which is also called a radio frequency transceiver, a radio frequency chip, or the like, and the signal transceiver 1 may receive a signal sent by a base station to the mobile terminal through an antenna, or may transmit a signal sent by the mobile terminal to the base station through the antenna.

In this embodiment, the control device can switch the transmitting/receiving antenna of the signal by controlling the connection relationship between the different selection terminals and the data terminal of the three-pole three-throw switch 15. Generally, the control device may control the first selection terminal 151 and the second selection terminal 152 to be respectively conducted with the first data terminal 154, so that the signal transmitted by the signal transceiver 1 can be transmitted to the first antenna 11; meanwhile, the control device may also control the third selection terminal 153 to be conducted with the second data terminal 155, so that the signal received by the second antenna 12 can be transmitted to the signal transceiver 1.

In this embodiment, the mode in which the signal transceiving apparatus 1 transmits signals may be divided into a single band mode and an aggregation mode. When the mode of transmitting signals is a single-band mode, the signals transmitted by the signal transceiver 1 are transmitted to the base station only through the lower antenna, and the three-pole three-throw switch 15 is initially connected in such a manner that the first selection terminal 151 and the second selection terminal 152 are respectively conducted with the first data terminal 154, and the third selection terminal 153 is conducted with the second data terminal 155. When the mode of transmitting signals is the aggregation mode, signals transmitted by the signal transceiver 1 are transmitted to the base station through the lower antenna and the side antenna, the three-pole-three-throw switch 15 is initially connected in such a manner that the first selection terminal 151 and the second selection terminal 152 are respectively conducted with the first data terminal 154, the first selection terminal 151 and the second selection terminal 152 are also respectively conducted with the third data terminal 156, and the third selection terminal 153 is conducted with the second data terminal 155. When the mode of transmitting signals is the aggregation mode, the two antennas are used for transmitting signals respectively, so that the signal transmission efficiency can be improved, and the signal transmission time can be shortened.

In a possible embodiment, a signal amplification module 2 (MMPA) is further disposed between the paths corresponding to the first selection terminal 151 and the second selection terminal 152 of the three-pole three-throw switch 15 and the signal transceiver 1, the signal amplification module 2 may perform signal amplification processing (usually to 23 dbm) on the signal transmitted by the signal transceiver 1, and the signal processed by the signal amplification module 2 may respectively flow to the paths corresponding to the first selection terminal 151 and the second selection terminal 152.

In one possible embodiment, the antenna circuit may further include: a first signal transmitting module 3 connected between the first selecting terminal 151 and the signal transceiving apparatus 1. The first signal transmitting module 3 comprises a first filtering device and a first signal correcting device, and the first filtering device is respectively connected with the signal transceiving device 1 and the first signal correcting device.

The first signal transmitting module 3 is configured to transmit the intermediate frequency signal sent by the signal transceiving apparatus 1 to the first selection end 151 of the three-pole three-throw switch 15; the first filtering device is used for filtering the intermediate frequency signal sent by the signal transceiver 1; the first signal correction device is used for correcting the signal processed by the first filtering device to a preset target signal.

In this embodiment, the signal transceiver 1 can transmit an intermediate frequency signal and a high frequency signal, wherein the intermediate frequency signal can be transmitted to the first selection terminal 151 of the three-pole three-throw switch 15 through the first signal transmitting module 3. The first signal transmitting module 3 is provided with a first filtering device and a first signal correcting device, where the first filtering device may be multiple, and signals of different frequency bands may respectively correspond to one first filtering device, for example, a B1 signal, a B2 signal, and a B3 signal may respectively correspond to one first filtering device. The first signal calibration device may be only one, and it may calibrate the signal output from the first filtering device to a preset target signal, that is, a standard signal value (standard frequency value, standard power value, etc.) corresponding to the signal when the signal transceiving device 1 transmits the signal.

In this embodiment, the first signal transmitting module 3 may be a TXM (Tx-Rx Front-End module). The first filtering device may be a duplexer or a filter, or of course, may be other devices having a filtering function, and is not limited herein. The first signal correction means may be a coupler (CPL, coupler).

In this embodiment, after the signal sent by the signal transceiver is amplified by the signal amplifying module, the signal may be filtered by the first filtering device corresponding to each frequency band, so as to avoid interference and ensure the accuracy of the signal. Furthermore, the frequency value or power value of the signal after filtering may deviate from the standard signal value, so that, to further ensure the accuracy of the signal, the first signal correction device may be used to correct the signal, so as to ensure the standard and accuracy of the signal when being transmitted from the corresponding antenna, avoid error interference, and improve the signal transmission quality.

In one possible embodiment, the first signal transmitting module 3 can be used to transmit a high-frequency signal (for example, a B40 signal) other than the first high-frequency signal and the second high-frequency signal to the first selection terminal 151 of the three-pole-three-throw switch 15, besides the intermediate-frequency signal transmitted by the signal transceiving apparatus 1 to the first selection terminal 151 of the three-pole-three-throw switch 15.

In one possible implementation, the antenna circuit may further include: a second signal transmitting module connected between the second selecting terminal 152 and the signal transceiving apparatus 1. The second signal transmitting module comprises a second filtering device 5, a third filtering device 6, a single-pole double-throw switch 14 and a second signal correcting device 8; single pole double throw switch 14 includes a first input 141, a second input 142, and an output 143; the first input terminal 141 or the second input terminal 142 is connected to or disconnected from the output terminal 143; the second filter device 5 is connected to the signal transceiver device 1 and the first input terminal 141, the third filter device 6 is connected to the signal transceiver device 1 and the second input terminal 142, the output terminal 143 is connected to the second signal calibration device 8, and the second signal calibration device 8 is connected to the signal transceiver device 1.

The second signal transmitting module is configured to transmit the high-frequency signal sent by the signal transceiver 1 to the second selecting terminal 152 of the three-pole three-throw switch 15; the second filtering device 5 is used for filtering the first high-frequency signal sent by the signal transceiver 1; the third filtering device 6 is used for filtering the second high-frequency signal sent by the signal transceiver 1; the first high-frequency signal is a B7 signal, and the second high-frequency signal is a B41 signal; the single-pole double-throw switch 14 is used for transmitting the signal processed by the second filtering device 5 or the third filtering device 6 to the second signal correcting device 8; the second signal calibration device 8 is used for calibrating the signal transmitted by the single-pole double-throw switch 14 to a preset target signal.

In the embodiment, the transmitting and receiving frequency of the B41 signal is 2496MHz-2690MHz; the transmission frequency of the B7 signal is 2500MHZ-2570MHz, and the receiving frequency of the B7 signal is 2620MHz-2690MHz.

In the present embodiment, the second filtering device 5 may be a duplexer or a filter, or may be another device having a filtering function, which is not limited herein. Similarly, the third filtering device 6 may be a duplexer or a filter, or of course, may be another device having a filtering function, and is not limited herein. The second filter means 5 and the third filter means 6 may be of the same type or of different types. The second signal correction means 8 may be a coupler (CPL, coupler).

In the present embodiment, due to the setting of the network operator, when the mode of the transmission signal is the aggregation mode, the high frequency signal only considers the first high frequency signal (B7 signal) and the second high frequency signal (B41 signal), and therefore, it is necessary to process the first high frequency signal and the second high frequency signal with a focus in the high frequency signal transmitted by the signal transceiver 1, and for this reason, the path to which the second selection terminal 152 of the three-pole-three-throw switch 15 is connected is the transmission path of the first high frequency signal (B7 signal) and the second high frequency signal (B41 signal), and the other high frequency signals are not transmitted through the second selection terminal 152. In addition, since the frequency bands of the first high frequency signal and the second high frequency signal are different, it is necessary to perform filtering processing on the first high frequency signal and the second high frequency signal, respectively.

In this embodiment, when the high-frequency signal sent by the signal transceiver is the first high-frequency signal, the control device may control the first input terminal and the output terminal of the single-pole double-throw switch to be conducted, so that the first high-frequency signal may be filtered by the second filtering device and then transmitted to the second signal correction device. When the high-frequency signal sent by the signal transceiver is the second high-frequency signal, the control device can control the second input end and the output end of the single-pole double-throw switch to be conducted, so that the second high-frequency signal can be transmitted to the second signal correction device after being filtered by the third filtering device. Because only one transmission is usually provided for the first high-frequency signal and the second high-frequency signal, through the arrangement, targeted filtering processing of different high-frequency signals can be realized, interference is avoided, and the accuracy of the signals is improved.

Furthermore, the frequency value or power value of the signal after filtering may deviate from the standard signal value, so that in order to further ensure the accuracy of the signal, the signal may be corrected by using the second signal correction device, so as to ensure the standard and accuracy of the signal when being transmitted from the corresponding antenna, avoid error interference, and improve the signal transmission quality.

In this embodiment, since the three antennas of the mobile terminal are connected to the data terminals of the three-pole three-throw switch, and the second signal transmitting module only involves switching of two paths, and does not involve switching of antennas, the two-pole two-throw switch can be replaced with a single-pole two-throw switch with a smaller occupied area, thereby further reducing the production cost of the circuit board.

In one possible implementation, the antenna circuit may further include: a signal receiving module 4 connected between the third selection terminal 153 and the signal transceiving apparatus 1; the signal receiving module 4 includes a plurality of fourth filtering devices.

The signal receiving module 4 is configured to transmit a signal received by the second antenna 12 to the signal transceiving apparatus 1; the fourth filtering device is used for filtering the received corresponding signals.

In the present embodiment, after receiving the signal transmitted by the base station, the second antenna 12 can return to the signal transceiver 1 through the signal transmission path, thereby completing the main set reception of the signal. In addition, the signal received by the second antenna 12 can also be transmitted to the signal receiving module 4 through the second data terminal 155 and the third selection terminal 153 of the triple-pole triple-throw switch 15, and then transmitted to the signal transceiver 1, thereby completing the signal diversity receiving path.

In this embodiment, the signal receiving module 4 may be a receiving integrated module (diffem), and a fourth filtering device and a single-pole N-throw switch corresponding to signals of each frequency band of medium and high frequencies are disposed in the signal receiving module 4, after the signal receiving module 4 receives the signal, the control device may turn on a selection terminal corresponding to the single-pole N-throw switch according to the frequency band (i.e., signal type) of the signal, so that the signal can be transferred to the corresponding fourth filtering device for filtering, and the filtered signal is transmitted to the signal transceiver 1.

In this embodiment, the signal receiving module can implement diversity reception of signals, thereby improving the efficiency of signal reception, and in addition, the fourth filtering device corresponding to the signal of each frequency band in the signal receiving module can implement targeted filtering processing of the signal of different frequency bands, thereby avoiding interference and improving the accuracy of the signal.

In this embodiment, the signal transceiver is respectively connected to a first selection terminal, a second selection terminal, and a third selection terminal of the three-pole three-throw switch, the first data terminal is connected to the first antenna, the second data terminal is connected to the second antenna, the third data terminal is connected to the third antenna, the first antenna is a lower antenna in the mobile terminal, the second antenna is an upper antenna in the mobile terminal, and the third antenna is a side antenna in the mobile terminal. In the antenna circuit of the present application, a double-pole four-throw switch in an existing antenna circuit is changed to a three-pole three-throw switch, and three data terminals of the three-pole three-throw switch are respectively connected to three antennas. Therefore, the switching among the lower antenna, the side antenna and the upper antenna can be directly realized only by switching different connection modes of the three-pole three-throw switch, the switching of the antennas is realized without the matching mode of the double-pole two-throw switch and the double-pole four-throw switch, the line loss of the circuit board is reduced, and the occupied area of the switch of the circuit board is also saved. In addition, since the paths of signal transmission of different antennas are basically the same and the routing loss is basically the same before and after the antennas are switched by the three-pole three-throw switch, when the antenna circuit board is produced, a signal corrector does not need to be independently arranged for a side antenna circuit, only the signal corrector in front of the three-pole three-throw switch is reserved, a corrected signal is completed by the signal corrector, and can be directly transmitted to the corresponding antenna through the three-pole three-throw switch, and the signal correction is not needed to be carried out due to the switching of the antennas, so that the production cost of the antenna circuit board is saved. Correspondingly, when the antenna circuit is calibrated and tested to determine the specific signal compensation value of the signal corrector, the lower antenna circuit and the side antenna circuit do not need to be tested respectively to determine the signal compensation values corresponding to the two signal correctors on the lower antenna circuit and the side antenna circuit respectively. Through the arrangement, the production cost of the antenna circuit board is saved, the testing steps during production are reduced, the operation is simple and convenient, and the production efficiency of the antenna circuit board is improved.

Example two

Fig. 3 is a flowchart of a control method of an antenna circuit according to an embodiment of the present application, where the antenna circuit may be the antenna circuit according to the first embodiment, and the present application describes the control method of the antenna circuit with an execution subject as a control device in the antenna circuit. As shown in fig. 3, the control method of the antenna circuit may include the steps of:

s101: and the control device determines the transmitting antenna corresponding to the signal according to the mode of the signal transmitted by the signal transmitting and receiving device.

In this embodiment, the first antenna may be a lower antenna in the mobile terminal, which is located at the lower side of the mobile terminal, and the main signal is transmitted and the signal strength is large; the second antenna can be an upper antenna in the mobile terminal, is positioned at the upper side of the mobile terminal, receives the main signal and has higher signal strength; the third antenna may be a side antenna in the mobile terminal, which is located on the left side or the right side of the mobile terminal, and has a smaller signal strength.

In this embodiment, the signal transceiver device may be a radio frequency front end processor in a mobile terminal, which is also called a radio frequency transceiver, a radio frequency chip, or the like, and the signal transceiver device may receive a signal sent by a base station to the mobile terminal through an antenna, and may also transmit a signal sent by the mobile terminal to the base station through the antenna.

In a possible embodiment, the determining, according to the mode of the signal transmitted by the signal transceiver and received by the signal receiving and transmitting device, a transmitting antenna corresponding to the signal in step S101 may include: determining whether the mode of the signal transmitting and receiving device for transmitting signals is a single-frequency band mode or an aggregation mode; if the mode of transmitting the signal is a single-frequency-band mode, the transmitting antenna corresponding to the signal is a first antenna; and if the mode of transmitting the signals is the aggregation mode, the transmitting antennas corresponding to the signals are the first antenna and the third antenna.

In this embodiment, the mode of transmitting the signal by the signal transceiving apparatus can be divided into a single-band mode and an aggregation mode. And when the mode of transmitting the signals is the aggregation mode, the signals transmitted by the signal transceiving device are transmitted to the base station through the lower antenna by default.

In the present embodiment, the signal transmitting antenna is only associated with the mode in which the signal transmitting/receiving device transmits the signal, when the user does not receive any influence of the posture of holding the mobile phone by the user, the signal strength, and the like. Therefore, the transmitting antenna corresponding to the signal can be simply and accurately determined through the mode of the signal transmitting and receiving device for transmitting the signal.

S102: and determining the initial connection mode of the three-pole three-throw switch according to the transmitting antenna so that the signal can be transmitted to the base station through the transmitting antenna after being transmitted from the signal transceiving device.

In this embodiment, the initial connection manner in S102 may be: the first selection end and the second selection end are respectively conducted with the first data end, or the first selection end and the second selection end are respectively conducted with the first data end, and the first selection end and the second selection end are also respectively conducted with the third data end.

In a possible embodiment, the determining the initial connection mode of the three-pole three-throw switch according to the transmitting antenna in step S102 may include: if the transmitting antenna is a first antenna, controlling a first selection end and a second selection end in the three-pole three-throw switch to be respectively communicated with a first data end so that the signals can be transmitted to the base station through the first antenna after being transmitted from the signal transceiving device; if the transmitting antennas are the first antenna and the third antenna, the first selecting end and the second selecting end in the three-pole three-throw switch are controlled to be respectively conducted with the first data end, and the first selecting end and the second selecting end are also respectively conducted with the third data end, so that signals can be transmitted to the base station through the first antenna and the third antenna after being transmitted from the signal transceiving device.

In the present embodiment, due to the setting of the network operator, when the mode of transmitting signals is the aggregation mode, the high frequency signals consider only the first high frequency signal (B7 signal) and the second high frequency signal (B41 signal), and therefore, the path to which the second selection terminal is connected is only the transmission path of the first high frequency signal and the second high frequency signal, and the path to which the first selection terminal is connected is the transmission path of the intermediate frequency signal and the transmission path of the high frequency signals other than the first high frequency signal and the second high frequency signal.

In this embodiment, the path through which the first selection terminal and the second selection terminal are connected is a transmission path of all signals transmitted by the signal transceiver device, so that after the transmitting antenna is determined, the first selection terminal and the second selection terminal can be controlled to be conducted with the corresponding data terminals, and thus the connection mode of the three-pole three-throw switch is simply and accurately determined, and the transmission of the signals to the antenna is realized.

In one possible embodiment, when there is a high frequency signal in the signal transmitted by the signal transceiving means, the method may further include: judging whether the high-frequency signal is a first high-frequency signal or a second high-frequency signal, wherein the first high-frequency signal is a B7 signal, and the second high-frequency signal is a B41 signal; if the high-frequency signal is a first high-frequency signal, controlling the first input end and the output end of the single-pole double-throw switch to be connected, and controlling the second input end and the output end to be disconnected, so that the first high-frequency signal is transmitted to a second selection end of the three-pole three-throw switch after being filtered by a second filtering device; if the high-frequency signal is a second high-frequency signal, the first input end and the output end of the single-pole double-throw switch are controlled to be disconnected, and the second input end and the output end are controlled to be connected, so that the second high-frequency signal is transmitted to the second selection end of the three-pole double-throw switch after being filtered by the third filtering device.

In this embodiment, when the first input terminal of the spdt switch is connected to the output terminal, the first high frequency signal may be transmitted to the second selection terminal of the spdt switch through the spdt switch; when the second input end of the single-pole double-throw switch is conducted with the output end, a second high-frequency signal can be transmitted to the second selection end of the three-pole three-throw switch through the single-pole double-throw switch.

In this embodiment, if the high frequency signal is not the first high frequency signal, not the second high frequency signal, but another high frequency signal, the single-pole double-throw switch is turned off and is not transmitted through the second selection terminal of the three-pole three-throw switch.

In this embodiment, after the initial connection mode of the three-pole three-throw switch is determined, if there is a high-frequency signal in the signals transmitted by the signal transceiver, since the first high-frequency signal and the second high-frequency signal cannot be transmitted simultaneously, it is also necessary to determine the connection mode of the single-pole two-throw switch according to the type of the high-frequency signal (the first high-frequency signal or the second high-frequency signal), so that the high-frequency signal can enter the corresponding filter device for filtering, and different high-frequency signals are processed in a targeted manner, thereby improving the accuracy of the high-frequency signal processing.

S103: after the signal transceiving device transmits signals, whether the initial connection mode of the three-pole three-throw switch is switched or not is determined according to the power values of the signals transmitted and received by the first antenna in the transmitting antenna.

In this embodiment, the signal power in this embodiment is the signal strength in the foregoing.

In a possible embodiment, the determining whether to switch the initial connection mode of the three-pole three-throw switch according to the power values of the transmission signal and the reception signal of the first antenna in the transmission antenna in step S103 may include: judging whether a first power value of a first antenna transmission signal is smaller than a first power threshold value; if so, determining whether to switch the initial connection mode of the three-pole three-throw switch according to a second power value of the first antenna receiving signal; if not, controlling a first selection end and a second selection end in the three-pole three-throw switch to be respectively disconnected with the first data end, and respectively conducting the first selection end and the second selection end with the third data end, or controlling the first selection end and the second selection end in the three-pole three-throw switch to be respectively disconnected with the first data end, so that the transmitting antenna corresponding to the signal is switched to a third antenna from the first antenna, or the first antenna and the third antenna are switched to the third antenna.

In this embodiment, the specific value of the first power threshold may be flexibly set by those skilled in the art according to practical applications, and is not limited herein.

In this embodiment, if the first power value of the first antenna transmitting signal is smaller than the first power threshold, it indicates that the signal strength is low at this time, which will not affect human health, and the signal strength does not need to be reduced, and at this time, the transmitting antenna may determine whether to perform switching according to the second power value of the received signal; if the first power value of the signal transmitted by the first antenna is not less than the first power threshold, it indicates that the signal strength is high at this time, which may affect human health, and the signal strength needs to be reduced.

In this embodiment, if the transmitting antenna is a first antenna, the control device may control the first selecting terminal and the second selecting terminal in the triple-pole triple-throw switch to be respectively disconnected from the first data terminal, and the first selecting terminal and the second selecting terminal to be respectively connected to the third data terminal, so as to switch the transmitting antenna corresponding to the signal from the first antenna to the third antenna. If the transmitting antennas are the first antenna and the third antenna, the control device may control the first selecting terminal and the second selecting terminal in the triple-pole triple-throw switch to be disconnected from the first data terminal, respectively, so that the transmitting antenna corresponding to the signal is switched from the first antenna and the third antenna to the third antenna.

In this embodiment, if it is detected that the first power value of the first antenna transmission signal is not less than the first power threshold, that is, when the antennas need to be switched, the control device can simply and conveniently switch the transmission antenna to the third antenna by switching the initial connection mode of the three-pole three-throw switch, so that the signal strength is reduced, two switches do not need to be switched, and the line loss is reduced.

In one possible embodiment, determining whether to switch the initial connection mode of the three-pole three-throw switch according to the second power value of the signal received by the first antenna may include: judging whether the second power value is larger than a second power threshold value; if so, not switching the initial connection mode of the three-pole three-throw switch; if not, controlling a first selection end and a second selection end in the triple-pole triple-throw switch to be respectively disconnected with the first data end, and respectively conducting the first selection end and the second selection end with the second data end, so that the transmitting antenna corresponding to the signal is switched from the first antenna to the second antenna, or switched from the first antenna and the third antenna to the second antenna and the third antenna.

In this embodiment, the specific value of the second power threshold may be flexibly set by those skilled in the art according to practical applications, and is not limited herein. Typically, the second power threshold is less than the first power threshold.

In this embodiment, if the second power value is greater than the second power threshold, it indicates that the signal receiving power is higher at this time, and the first antenna receives or transmits a signal in a normal state, and does not need to switch antennas; if the second power value is not greater than the second power threshold, it is determined that the signal receiving power is low at this time, and it may be determined that the user is holding the lower side of the mobile terminal, so that the first antenna receives or transmits signals with interference, and at this time, the signal transmitting quality may be ensured by switching the first antenna of the transmitting antennas to the second antenna that is not affected by the user's posture.

In this embodiment, if the transmitting antenna is a first antenna, the control device may control the first selection terminal and the second selection terminal in the triple-pole triple-throw switch to be respectively disconnected from the first data terminal, and the first selection terminal and the second selection terminal to be respectively connected to the second data terminal, so as to switch the transmitting antenna corresponding to the signal from the first antenna to the second antenna; if the transmitting antennas are the first antenna and the third antenna, the control device may control the first selection end and the second selection end in the triple-pole triple-throw switch to be disconnected from the first data end respectively, and the first selection end and the second selection end are conducted with the second data end respectively, at this time, the first selection end and the second selection end are kept conducted with the third data end, so that the transmitting antennas corresponding to the signals are switched from the first antenna and the third antenna to the second antenna and the third antenna.

In this embodiment, if it is detected that the second power value is less than or equal to the second power threshold, that is, when the antennas need to be switched, the control device only needs to switch the initial connection mode of the three-pole three-throw switch, and can simply and conveniently switch the first antenna in the transmitting antennas to the second antenna, thereby avoiding the influence on the receiving/transmitting quality of the signals when the user holds the lower side of the mobile terminal.

In this embodiment, after determining the initial transmitting antenna corresponding to the signal and the initial connection mode of the corresponding three-pole three-throw switch according to the mode of the signal transmitted by the signal transceiver, whether to switch the initial connection mode of the three-pole three-throw switch may be determined in real time according to the power values of the signal transmitted by the first antenna and the signal received by the first antenna. Through the arrangement, the switching among the lower antenna, the side antenna and the upper antenna can be directly realized only by switching different connection modes of the three-pole three-throw switch, the switching of the antennas is not required to be realized in a mode of matching the double-pole two-throw switch and the double-pole four-throw switch, the mismatching is simple and convenient, and the occupied area of the switch of the circuit board is saved.

Fig. 4 is a schematic structural diagram of a control device of an antenna circuit according to an embodiment of the present application, and as shown in fig. 4, the control device includes: a processor 101, and a memory 102 communicatively coupled to the processor 101; the memory 102 stores computer-executable instructions; the processor 101 executes computer-executable instructions stored in the memory 102 to implement the steps of the control method of the antenna circuit in the above method embodiments.

The control device may be independent or a part of the mobile terminal, and the processor 101 and the memory 102 may be implemented by existing hardware of the mobile terminal.

In the above control device, the memory 102 and the processor 101 are directly or indirectly electrically connected to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines, such as a bus. The memory 102 stores computer-executable instructions for implementing the data access control method, including at least one software functional module that can be stored in the memory 102 in the form of software or firmware, and the processor 101 executes various functional applications and data processing by running the software programs and modules stored in the memory 102.

The Memory 102 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 102 is used for storing programs, and the processor 101 executes the programs after receiving the execution instructions. Further, the software programs and modules within the memory 102 may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.

The processor 101 may be an integrated circuit chip having signal processing capabilities. The Processor 101 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and so on. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-executable instructions are used for implementing steps of the method embodiments of the present application.

An embodiment of the present application also provides a computer program product comprising a computer program that, when being executed by a processor, performs the steps of the method embodiments of the present application.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. An antenna circuit, comprising: the device comprises a signal transceiving device, a three-pole three-throw switch, a first antenna, a second antenna, a third antenna and a control device; the signal transceiver is a radio frequency front-end processor;

the signal receiving and sending device is used for receiving a signal sent to the mobile terminal by the base station or sending the signal sent by the mobile terminal to the base station;

the control device is connected with the signal transceiving device and used for determining a transmitting antenna corresponding to the signal according to the mode of the signal transmitting and receiving device for transmitting the signal; determining an initial connection mode of the three-pole three-throw switch according to the transmitting antenna so that the signal can be transmitted to a base station through the transmitting antenna after being transmitted from the signal transceiving device;

wherein, the initial connection mode is as follows: the first selection end and the second selection end are respectively communicated with the first data end, or the first selection end and the second selection end are respectively communicated with the first data end, and the first selection end and the second selection end are also respectively communicated with the third data end;

further comprising: the first signal transmitting module is connected between the first selecting end and the signal transceiving device;

the first signal transmitting module comprises a first filtering device and a first signal correcting device, and the first filtering device is respectively connected with the signal receiving and transmitting device and the first signal correcting device;

the first signal correction device is used for correcting the signal processed by the first filtering device to a preset target signal;

further comprising: the second signal transmitting module is connected between the second selecting end and the signal transceiving device;

the second filtering device is used for filtering the first high-frequency signal sent by the signal transceiving device; the third filtering device is used for filtering the second high-frequency signal sent by the signal receiving and sending device; the first high-frequency signal is a B7 signal, and the second high-frequency signal is a B41 signal;

the second signal correction device is used for correcting the signal transmitted by the single-pole double-throw switch to a preset target signal;

further comprising: a signal receiving module connected between the third selecting terminal and the signal transceiving device; the signal receiving module comprises a plurality of fourth filtering devices;

the signal receiving module is used for transmitting the signal received by the second antenna to the signal transceiver;

2. A control method using the antenna circuit of claim 1, the method comprising:

3. The method according to claim 2, wherein the determining the transmitting antenna corresponding to the signal according to the mode of the signal transmitting/receiving device for transmitting the signal specifically includes:

4. The method as claimed in claim 3, wherein said determining an initial connection of the triple-pole triple-throw switch based on the transmit antenna comprises:

if the transmitting antennas are the first antenna and the third antenna, the first selecting end and the second selecting end in the triple-pole triple-throw switch are controlled to be respectively conducted with the first data end, and the first selecting end and the second selecting end are also respectively conducted with the third data end, so that the signals can be transmitted to a base station through the first antenna and the third antenna after being transmitted from the signal transceiving device.

5. The method according to claim 4, wherein the determining whether to switch the initial connection mode of the three-pole three-throw switch according to the power values of the transmission signal and the reception signal of the first antenna of the transmission antenna specifically comprises:

judging whether a first power value of the first antenna transmission signal is smaller than a first power threshold value or not;

6. The method of claim 5, wherein determining whether to switch the initial connection mode of the three-pole three-throw switch based on the second power value of the signal received by the first antenna comprises:

if not, controlling a first selection end and a second selection end in the three-pole three-throw switch to be respectively disconnected from a first data end, and controlling the first selection end and the second selection end to be respectively connected with a second data end, so that a transmitting antenna corresponding to the signal is switched from the first antenna to the second antenna, or switched from the first antenna and the third antenna to the second antenna and the third antenna.

7. The method according to claim 2, wherein when a high frequency signal is present in the signal transmitted by the signal transceiving apparatus, the method further comprises:

if the high-frequency signal is a first high-frequency signal, controlling a first input end and an output end of the single-pole double-throw switch to be connected, and controlling a second input end and the output end to be disconnected, so that the first high-frequency signal is transmitted to a second selection end of the three-pole three-throw switch after being filtered by a second filtering device;

if the high-frequency signal is a second high-frequency signal, the first input end and the output end of the single-pole double-throw switch are controlled to be disconnected, and the second input end and the output end are controlled to be connected, so that the second high-frequency signal is transmitted to a second selection end of the three-pole double-throw switch after being filtered by a third filtering device.