CN115333550A

CN115333550A - Radio frequency system and radio frequency communication method

Info

Publication number: CN115333550A
Application number: CN202210641884.3A
Authority: CN
Inventors: 陈锋; 仝林
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-11-11

Abstract

The embodiment of the application discloses a radio frequency system and a radio frequency communication method. The radio frequency system includes: an antenna assembly comprising a first antenna, a second antenna, a third antenna, and a fourth antenna; the first radio frequency path is switchably connected with the first antenna or the second antenna and is used for transmitting and receiving radio frequency signals of a first frequency band by using the first antenna and receiving radio frequency signals of the first frequency band by using the second antenna; a second radio frequency path, switchably connected to the third antenna or the fourth antenna, configured to perform a transceiving operation on a radio frequency signal of a first frequency band by using the third antenna, and perform a receiving operation on the radio frequency signal of the first frequency band by using the fourth antenna; and the receiving path is switchably connected with the third antenna or the fourth antenna and is used for receiving the radio-frequency signals of the first frequency band.

Description

Radio frequency system and radio frequency communication method

Technical Field

The present application relates to the field of information processing, and in particular, to a radio frequency front end device and an electronic apparatus.

Background

The radio frequency communication system comprises a radio frequency transceiver, a radio frequency front-end device and an antenna assembly, wherein the antenna assembly can comprise at least two antennas; the radio frequency front end device can receive radio frequency signals from the radio frequency transceiver, process the radio frequency signals and send the radio frequency signals through the antenna in the antenna group, and receive the radio frequency signals through the antenna in the antenna group, process the radio frequency signals and send the radio frequency signals to the radio frequency transceiver.

When the electronic device operates in a DR-DSDS (Dual receive-Dual SIM Dual Standby) mode, the radio Frequency system cannot support antenna switching in an FDD (Frequency Division Duplex) mode.

Disclosure of Invention

In order to solve any one of the above technical problems, an embodiment of the present application provides a radio frequency system and a radio frequency communication method.

To achieve the object of the embodiments of the present application, an embodiment of the present application provides a radio frequency system, including:

an antenna assembly comprising a first antenna, a second antenna, a third antenna, and a fourth antenna;

the first radio frequency path is switchably connected with the first antenna or the second antenna and is used for transmitting and receiving radio frequency signals of a first frequency band by using the first antenna and receiving radio frequency signals of the first frequency band by using the second antenna;

a second radio frequency path, switchably connected to the third antenna or the fourth antenna, configured to perform a transceiving operation on a radio frequency signal of a first frequency band by using the third antenna, and perform a receiving operation on the radio frequency signal of the first frequency band by using the fourth antenna;

and the receiving path is switchably connected with the third antenna or the fourth antenna and is used for receiving the radio-frequency signals of the first frequency band.

A radio frequency communication method is applied to a radio frequency system and comprises the following steps:

detecting whether the first radio frequency channel has antenna switching operation;

and if the first radio frequency path is switched from a second antenna to a first antenna, controlling the second radio frequency path and the receiving path to execute antenna switching operation.

One of the above technical solutions has the following advantages or beneficial effects:

because the receiving path is switchably connected with the third antenna or the fourth antenna, when the second radio frequency path is switched, the receiving path can also switch antennas along with the second radio frequency path, so that the purpose of executing antenna switching by both the transmitting path and the receiving path is realized, and the antenna switching in an FDD mode is realized.

Additional features and advantages of the embodiments of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the application. The objectives and other advantages of the embodiments of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the examples of the embodiments of the present application do not constitute a limitation of the embodiments of the present application.

FIG. 1 is a schematic diagram of a related art RF system;

FIG. 2 is a schematic diagram of an application of the RF system shown in FIG. 1;

fig. 3 is a schematic diagram of a radio frequency system according to an embodiment of the present application;

FIG. 4 (a) is a first schematic diagram of the RF system shown in FIG. 3;

FIG. 4 (b) is a second schematic diagram of the RF system shown in FIG. 3;

FIG. 4 (c) is a third schematic diagram of the RF system shown in FIG. 3;

FIG. 5 is a fourth schematic diagram of the RF system of FIG. 3;

FIG. 6 (a) is a first schematic diagram of the RF system shown in FIG. 5;

FIG. 6 (b) is a second schematic diagram of the RF system shown in FIG. 5;

FIG. 6 (c) is a third schematic diagram of the RF system shown in FIG. 5;

FIG. 7 is a fifth schematic diagram of the RF system of FIG. 3;

FIG. 8 (a) is a first schematic diagram of the RF system of FIG. 7;

FIG. 8 (b) is a second schematic diagram of the RF system of FIG. 7;

fig. 9 is an architecture diagram of a radio frequency system provided in an embodiment of the present application;

fig. 10 is a schematic diagram of a radio frequency communication method according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the embodiments of the present application, features in the embodiments and the examples may be arbitrarily combined with each other without conflict.

The radio frequency front-end device according to the embodiment of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a vehicle-mounted device, a wearable device, a computing device or other processing device connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and the like. For convenience of description, the above-mentioned devices are collectively referred to as a communication device.

The various antennas involved in embodiments of the present application may be formed using any suitable type of antenna. For example, each branch antenna may include an antenna with a resonating element formed from the following antenna structure: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and frequency band combinations. The antenna mentioned in the embodiments of the present application is not particularly limited.

Fig. 1 is a schematic diagram of a related art radio frequency system. As shown in fig. 1, the radio frequency system includes:

a second radio frequency path switchably connected to the third antenna or the fourth antenna, and configured to perform transceiving operation on a radio frequency signal of a first frequency band by using the third antenna, and perform receiving operation on the radio frequency signal of the first frequency band by using the fourth antenna;

and the receiving path is connected with the fourth antenna and is used for receiving the radio-frequency signals of the first frequency band.

The radio frequency system shown in fig. 1 may provide a dual-card dual-standby function for radio frequency signals of a first frequency band, where a first radio frequency path is used for data transmission of the card 1, and a second radio frequency path and a receiving path are both used for data transmission of the card 2.

In the process of implementing the present application, the following problems are found in the structure shown in fig. 1, including:

in the rf system shown in fig. 1, the card 2 performs Tx hopping only support, i.e., the transmission path is switched and the reception path is not switched. In the conventional antenna switching, when the transmission path is switched, the corresponding reception path must be switched, that is, the FDD antenna switching is performed.

Because the two paths of emission switching mechanism in the same frequency band cannot be independently arranged on the platform, the first radio frequency path of the card 1 can only adopt a Tx hopping mode to realize antenna switching ASDIV, so that the dual card cannot support FDD mode antenna switching in a DR-DSDS working mode.

Fig. 2 is a schematic diagram of an application of the rf system shown in fig. 1. As shown in fig. 2, the radio frequency system includes:

the LMH LFEM is switchably connected with the first antenna or the second antenna and used for receiving radio frequency signals of an LTE MHB frequency band;

the MHB LPAMID is switchably connected with the first antenna or the second antenna and used for receiving and transmitting radio frequency signals in an N41 frequency band;

an endec MMPA (Multi-band Multi-mode Power Amplifier, MMPA) switchably connected to the third antenna or the fourth antenna, for receiving and transmitting a radio frequency signal of an N41 frequency band;

the MHB MIMO LFEM is switchably connected with the third antenna or the fourth antenna and is used for receiving and transmitting radio frequency signals of an MHB frequency band;

the LNA BANK is connected with the fourth antenna and used for receiving radio frequency signals of an N41 frequency band;

in the configuration shown in fig. 2, the endec MMPA may be switchably connected to the third antenna or the fourth antenna through the first filter; the LNA BANK may pass through the second filter and the fourth antenna. The first filter and the second filter are used for filtering interference signals from received radio frequency signals and reserving radio frequency signals of an N41 frequency band.

The radio frequency system provided in fig. 2 is an N41 common radio frequency front end architecture in a mobile phone terminal, the antennas used by the card 1 are a first antenna and a second antenna, and the antennas used by the card 2 are a third antenna and a fourth antenna. Two transmit and 4 receive (2T 4R) in the N41 band are supported under an N41 SA (standard alone). In order to improve the user experience, it is required that the N41 SA can support 4-way Antenna Switching (ASDIV) under operation, and in addition, because the ANT4 is far away, an external LNA (Low Noise Amplifier, low Noise) is used to improve the receiving performance of the N41 way.

When the card 1 operates in the N41 SA mode and the card 2 operates in the MHB, if the card 1N41 is switched to the ANT1, the LMH LFEM receives the MHB paging through the ANT1 path at this time, so that the N41 transmission function of the MHB LPAMID collides with the MHB paging reception. At this time, if the card 2MHB is to be supported for paging reception, N41 cannot support 4-way ASDIV, and can only support 2-way antenna switching ASDIV, which finally affects user experience.

Based on the above analysis, the embodiments of the present application provide the following solutions, including:

fig. 3 is a schematic diagram of a radio frequency system according to an embodiment of the present application. As shown in fig. 3, the radio frequency system includes:

In the system shown in fig. 3, the radio frequency system can support two-way Transmission (TX) and four-way Reception (RX) of radio frequency signals in a first frequency band, and specifically includes:

a function of transmitting a radio frequency signal of a first frequency band provided by a first antenna;

a function of transmitting a radio frequency signal of a first frequency band provided by a third antenna;

a receiving function of a radio frequency signal of a first frequency band provided by a first antenna;

a receiving function of a radio frequency signal of a first frequency band provided by a second antenna;

receiving function of radio frequency signal of first frequency band provided by third antenna

And the fourth antenna provides a function of receiving the radio frequency signal of the first frequency band.

By comparing fig. 1 and fig. 3, it can be seen that, in the radio frequency system provided in the embodiment of the present application, the receiving path is switchably connected to the third antenna or the fourth antenna.

In the configuration shown in fig. 3, the first rf path may transmit as a signal of the card 1, and the second rf path and the reception path may transmit as a signal of the card 2.

Further, since the card 2 can support switching of the FDD scheme, the card 1 can also support antenna switching of the FDD scheme, and thus the entire radio frequency system can support antenna switching of the FDD scheme.

The following explains the rf path corresponding to the card 1 in the rf system:

fig. 4 (a) is a first schematic diagram of the rf system shown in fig. 3. As shown in fig. 4 (a), the radio frequency system further includes:

an Antenna Switch Module (ASW), wherein the Antenna Switch Module has a first end and two second ends, wherein the first end is connected to the first rf path, the second end is connected to the first Antenna, and the second end is connected to the second Antenna, for controlling the conduction state of the first end and the second end.

In the system shown in fig. 4 (a), the first rf path is switchable with the first antenna or the second antenna by:

if the antenna switch module controls the first end and the second end to be in a conducting state, the first radio frequency channel carries out receiving and transmitting operation on radio frequency signals of a first frequency band through the first antenna; and if the antenna switch module controls the first end and the other second end to be in a conducting state, the first radio frequency channel receives radio frequency signals of a first frequency band through the second antenna.

The antenna switch module is arranged to realize that the first radio frequency path is switchably connected with the first antenna or the second antenna.

Fig. 4 (b) is a second schematic diagram of the rf system shown in fig. 3. As shown in fig. 4 (b), the radio frequency system further includes:

a switch control circuit having two first terminals and two second terminals; and one first end is connected with the second radio frequency channel, the other first end is connected with the receiving channel, one second end is connected with the third antenna, and the other second end is connected with the fourth antenna and used for controlling the first end and the second end of the switch control circuit to be in a conducting state.

In the system of fig. 4 (b), the second rf path is switchable with the third antenna or the fourth antenna by:

if a first end and a second end of the switch control circuit are in a conducting state, the second radio frequency channel utilizes the third antenna to perform the transceiving operation of the radio frequency signal of the first frequency band;

if a first end and another second end of the switch control circuit are in a conducting state, the second radio frequency channel utilizes the fourth antenna to receive the radio frequency signal of the first frequency band.

In the system shown in fig. 4 (b), the receiving path is switchable with the third antenna or the fourth antenna by:

if the other first end and the second end of the switch control circuit are in a conducting state, the receiving path utilizes the third antenna to receive the radio-frequency signal of the first frequency band;

if the other first end and the other second end of the switch control circuit are in a conducting state, the fourth radio frequency channel utilizes the fourth antenna to receive radio frequency signals of a third frequency band.

The second radio frequency path can be switchably connected with the third antenna or the fourth antenna by setting the switch control circuit, and the second radio frequency path can be switchably connected with the third antenna or the fourth antenna.

In addition, when the antenna switching operation is executed, since one second terminal of the switch control circuit is connected to the third antenna and the other second terminal is connected to the fourth antenna, the switch control circuit can realize that the radio frequency path connected to the first terminal is switched between the third antenna and the fourth antenna by controlling the antenna connected to the second terminal.

Fig. 4 (c) is a third schematic diagram of the rf system shown in fig. 3. As shown in fig. 4 (c), the switching control circuit includes a first switching device and a second switching device; wherein the first and second switching devices each have two first terminals and two second terminals; wherein:

the first switching device is used for controlling a first end and a second end of the first switching device to be in a conducting state;

the second switching device is used for controlling a first end and a second end of the second switching device to be in a conducting state;

a first end of the first switch device is connected to the second rf path, another first end of the first switch device is connected to a second end of the second switch device, a second end of the first switch device is connected to the third antenna, and another second end of the first switch device is connected to a first end of the second switch device;

the other first end of the second switching device is connected with the receiving path, and the other second end of the second switching device is connected with the fourth antenna.

In the system of fig. 4 (c), the second rf path is switchable with the third antenna or the fourth antenna by:

if a first end of the first switch device and a second end of the first switch device are in a conducting state, the second radio frequency path performs transceiving operation of radio frequency signals of a first frequency band through the third antenna;

if a first end of the first switch device and another second end of the first switch device are in a conducting state, and a first end of the second switch device and another second end of the second switch device are in a conducting state, the second radio frequency path performs a receiving operation of the radio frequency signal of the first frequency band through the fourth antenna.

In the system of fig. 4 (c), the receiving path is switchably connected to the third antenna or the fourth antenna by:

if the other first end of the second switch device and the second end of the second switch device are in a conducting state, and the other first end of the first switch device and the second end of the first switch device are in a conducting state, the second radio frequency path performs a receiving operation of the radio frequency signal of the first frequency band through the third antenna

And if the other first end of the second switch device and the other second end of the second switch device are in a conducting state, the second radio frequency path carries out receiving operation of the radio frequency signal of the first frequency band through the fourth antenna.

The second radio frequency path is switchably connected to the third antenna or the fourth antenna and the second radio frequency path is switchably connected to the third antenna or the fourth antenna by providing the first switching device and the second switching device.

Specifically, the other first terminal of the first switching device is connected to a second terminal of the second switching device, so that the receiving path can be connected to the other first terminal of the first switching device through the second switching device.

Fig. 5 is a fourth schematic diagram of the rf system shown in fig. 3. As shown in fig. 5, the radio frequency system further includes:

and the third radio frequency path is switchably connected with the third antenna or the fourth antenna and is used for receiving and transmitting radio frequency signals of a second frequency band.

The third rf path may perform transceiving of the rf signal in the second frequency band through the third antenna or the fourth antenna, and is also used for signal transmission of the card 2, and is independent of the path in the card 2 for transceiving the rf signal in the first frequency band.

The switchable connection of the third radio frequency path to the third antenna or the fourth antenna may be achieved by:

the method I comprises the following steps:

fig. 6 (a) is a first schematic diagram of the rf system shown in fig. 5. As shown in fig. 6 (a), the rf system further includes a third switching device, where the third switching device has a first terminal and two second terminals, the first terminal is connected to the third rf path, the second terminal is connected to the third antenna, and the other second terminal is connected to the fourth antenna, and is used to control the first terminal and the second terminal of the third switching device to be in a conducting state.

Specifically, if the first end and the second end of the third switching device are in a conducting state, the third rf path performs transceiving operation of the rf signal in the second frequency band through the third antenna; and if the first end of the third switching device and the other second end of the third switching device are in a conducting state, the third radio frequency path performs transceiving operation of the radio frequency signal of the second frequency band through the fourth antenna.

As can be seen from the above, the third rf path can be switchably connected to the third antenna or the fourth antenna by separately providing a switching device between the third rf path and the antenna.

The second method comprises the following steps:

fig. 6 (b) is a second schematic diagram of the rf system shown in fig. 5. As shown in fig. 6 (b), the switch control circuit further has a third first terminal, and the third first terminal is connected to the third rf path.

Specifically, if a third first end of the switch control circuit and a second end of the switch control circuit are in a conducting state, the third rf path performs transceiving operation of the rf signal of the second frequency band through the third antenna; and if the third first end of the switch control circuit and the other second end of the switch control circuit are in a conducting state, the third radio frequency channel carries out the transceiving operation of the radio frequency signal of the second frequency band through the fourth antenna.

The third radio frequency path can be switchably connected with the third antenna or the fourth antenna by additionally arranging a new port for the switch control circuit, so that the second radio frequency path, the third radio frequency path and the receiving path can be switched between the third antenna and the fourth antenna through the switch control circuit, and the integration level of hardware is improved.

Fig. 6 (c) is a third schematic diagram of the rf system shown in fig. 5. As shown in fig. 6 (c), when the second rf path and the receiving path implement antenna switching through the first switching device and the second switching device, the first switching device further has a third first end;

specifically, if the third first end of the first switch device and a second end of the first switch device are in a conducting state, the third rf path performs transceiving operation of the rf signal in the second frequency band through the third antenna; if the third first end of the first switch device and the another second end of the first switch device are in a conducting state, and the first end of the second switch device and the another second end of the second switch device are in a conducting state, the third rf path performs transceiving operation of the rf signal of the second frequency band through the fourth antenna.

The third radio frequency path can be switchably connected with the third antenna or the fourth antenna by additionally arranging a new port for the first switch device, so that the second radio frequency path, the third radio frequency path and the receiving path can be switched between the third antenna and the fourth antenna through the switch control circuit, and the integration level of hardware is improved.

Fig. 7 is a fifth schematic diagram of the rf system shown in fig. 3. As shown in fig. 5, the radio frequency system further includes:

and the fourth radio frequency path is switchably connected with the first antenna or the second antenna and is used for receiving and transmitting radio frequency signals of a third frequency band.

In the structure shown in fig. 7, the fourth rf path may perform transceiving of the rf signal in the first frequency band through the first antenna or the second antenna, and is also used for signal transmission of the card 1, and is independent from the path in the card 1 for transceiving the rf signal in the first frequency band.

The third rf path may be switchably connected to the first antenna or the second antenna by:

the first method is as follows:

fig. 8 (a) is a first schematic diagram of the rf system shown in fig. 7. As shown in fig. 8 (a), the rf system further includes a fourth switching device, where the fourth switching device has a first terminal and two second terminals, the first terminal is connected to the fourth rf path, the second terminal is connected to the first antenna, and the other second terminal is connected to the second antenna, so as to control the first terminal and the second terminal of the fourth switching device to be in a conducting state.

Specifically, if the first end and the second end of the fourth switching device are in a conducting state, the fourth rf path performs a transceiving operation of an rf signal in a third frequency band through the first antenna; and if the first end of the fourth switching device and the other second end of the fourth switching device are in a conducting state, the fourth radio frequency channel performs a transceiving operation of a radio frequency signal of a third frequency band through the fourth antenna.

As can be seen from the above, the fourth rf path can be switchably connected to the first antenna or the second antenna by separately providing a switching device between the fourth rf path and the antenna.

The second method comprises the following steps:

fig. 8 (b) is a second schematic diagram of the rf system shown in fig. 7. As shown in fig. 8 (b), the antenna switch module further has another first end, wherein the another first end is connected to the fourth rf path.

Specifically, when the other first end and the second end of the antenna switch module are in a conducting state, the fourth radio frequency channel transmits and receives radio frequency signals of a third frequency band by using the first antenna; when the other first end and the other second end of the antenna switch module are in a conducting state, the fourth radio frequency channel utilizes the second antenna to receive and transmit the radio frequency signal of the third frequency band.

By adding a new port for the antenna switch module, the first radio frequency path and the fourth radio frequency path can be switchably connected with the first antenna or the second antenna, so that the first radio frequency path and the fourth radio frequency path can be switched between the first antenna and the second antenna through the antenna switch module, and the integration level of hardware is improved.

Preferably, if the first rf path is disposed in a rf front-end device, the antenna switch module is integrated with the rf front-end device, so as to improve circuit integration and reduce wiring difficulty.

Referring to the structure shown in fig. 5, at least 3 ports need to be disposed at the first end of the first switch device, and are respectively connected to the second rf path, the third rf path, and the second end of the second switch device; the second end of the first switch device at least needs to be provided with 2 ports, and the ports are respectively connected with the third antenna and the first end of the second switch device. Based on the requirement of the number of the ports, the first switch device is DP4T or 3P3T.

Referring to the structure shown in fig. 5, at least 2 ports need to be disposed at the first end of the second switch device and are respectively connected to the receiving path and the second end of the first switch device, and at least 2 ports need to be disposed at the second end of the second switch device and are respectively connected to the first end of the first switch device and the fourth antenna. Based on the requirement of the number of the ports, the second switching device is a DPDT.

Optionally, the receiving path includes:

and the LNA is used for amplifying the received radio frequency signal of the first frequency band.

And amplifying the radio frequency signal of the first frequency band by using the LAN so as to facilitate the radio frequency module to process the signal and improve the signal processing efficiency.

Optionally, the second rf path and the receiving path are further provided with a filter for filtering an interference signal other than the rf signal in the first frequency band.

The following is an explanation of an application example provided in the embodiment of the present application:

fig. 9 is an architecture diagram of a radio frequency system according to an embodiment of the present application. As shown in fig. 9, the radio frequency system may implement a dual-card dual-standby function, that is, the radio frequency path corresponding to the first antenna and the second antenna is used as the data transmission path of the card 1; the third antenna and the fourth antenna act as a data transmission link for the card 2.

In the radio frequency paths corresponding to the card 1, the LMHB LFEM is used to implement the fourth radio frequency path, the MHB Lpamid is used to implement the first radio frequency path, and the antenna switch module ASW built in the MHB Lpamid is used to implement the switching between the first antenna and the second antenna;

in the radio frequency paths corresponding to the card 2, the second radio frequency path described above is implemented by using an endec MMPA and an N41 filter, the third radio frequency path described above is implemented by using an MHB MIMO LFEM, and the receiving path described above is implemented by using an LNA Bank, an LNA and an N41 filter.

Either 3P3T or DP4T may be selected as the first switching device and DPDT may be selected as the second switching device.

Controlled from the N41 rf front-end device shown in fig. 9, the 2-way transmit-4 receive (2T 4R) is supported under N41 SA.

Assuming that the receiving path in fig. 9 can only be connected to the fourth antenna, in a DR-DSDS (dual receive dual card dual standby) operating mode, if the card 1 operates in N41 SA (stand alone) only and the card 2 operates in MHB, when the operating antenna of the card 1 is switched from the second antenna to the first antenna, that is, the card 1 operates in a cross state, a collision may occur with MHB paging reception of the card 2, at this time, if the card 2MHB is supported to perform receiving paging, the N41 cannot support 4-way ASDIV, and can only support 2-way antenna switching div, which finally affects user experience.

Because the Antenna Switching (ASDIV) corresponding to the card 2 only supports the Tx hopping mode (TDD band support, transmit path switching, and receive path not switched, which does not reach the FDD mode ASDIV), and the two-path transmit switching mechanism platform in the same frequency band cannot be set independently, the antenna switching corresponding to the card 1 can only implement the antenna switching ASDIV in the Tx hopping mode.

In the application example of the present application, the receiving path in fig. 9 is switchably connected to the third antenna or the fourth antenna, so that the receiving path can perform antenna switching along with the second radio frequency path, and in time, the third radio frequency path receives data, and the radio frequency path in the N41 frequency band is not affected to perform antenna switching operation between the third antenna and the fourth antenna, thereby enabling the card 2 to support FDD mode antenna switching. Further, since the card 2 can support the radio frequency path of the N41 frequency band, the card 1 can also support the FDD mode antenna switching.

Because the radio frequency system can support 4 paths of ASDIV under the dual-card DRDSDS in the N41 frequency band, even if the radio frequency transmitting branch of the first frequency band of the card 2 is switched to be in a cross state, the second receiving branch can still carry out MHB receiving operation, and the problem of resource conflict under the dual-card is solved.

Based on the working principle of N41 under the dual card, the problem that the N41 can not realize 4-antenna switching due to resource conflict under the dual card is solved by using a switch device in the radio frequency front-end device, and the user experience when the antenna performance is reduced due to the fact that the N41 transmitting antenna in the mobile phone terminal is influenced by an external environment (such as when the mobile phone terminal is held by a hand) can be effectively improved.

Fig. 10 is a schematic diagram of a radio frequency communication method according to an embodiment of the present application. As shown in fig. 10, the method is applied to the radio frequency system described in any of the above, and includes:

1001, detecting whether the first radio frequency channel has antenna switching operation;

step 1002, if the first radio frequency path is switched from the second antenna to the first antenna, controlling both the second radio frequency path and the receiving path to perform antenna switching operation.

In the dual-card dual-standby system, the first radio frequency path is used as a radio frequency path of the card 1, the first radio frequency path performs a transceiving operation of a radio frequency signal of a first frequency band through the first antenna, and the first radio frequency path performs a receiving operation of the radio frequency signal of the first frequency band through the second antenna.

If the first radio frequency path is switched from the second antenna to the first antenna, it indicates that both the transmission path and the reception path of the first frequency band in the first radio frequency path need to be switched to the first antenna.

If the card 1 is required to support FDD antenna switching, the transmission path and the reception path of the first frequency band in the card 2 are also required to support FDD antenna switching, so that the FDD antenna switching of the card 2 can be realized by controlling the second radio frequency path and the reception path to both perform antenna switching operation. On the premise that the card 2 supports FDD mode antenna switching based on a radio frequency signal of the first frequency band, the card 1 can also support FDD mode antenna switching based on a radio frequency signal of the first frequency band, so that both a transmission path and a reception path of the first frequency band in the first radio frequency path can be switched to the first antenna.

Further, the controlling the second rf path and the receive path to perform an antenna switching operation includes:

and sending a control signal to the switch control circuit, wherein the control signal is used for switching the switch control circuit to be conducted with one of the third antenna and the fourth antenna to be conducted with the other one of the third antenna and the fourth antenna.

The purpose of switching the antenna can be simply and conveniently realized by controlling the conducting state of the switch control circuit.

An embodiment of the present application provides a storage medium, in which a computer program is stored, wherein the computer program is configured to perform the method described in any one of the above when the computer program is executed.

An embodiment of the application provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to perform the method described in any one of the above.

It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, R second radio frequency path M, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.

Claims

1. A radio frequency system, comprising:

2. The radio frequency system of claim 1, wherein the receive path comprises:

and the low-noise amplifier is used for amplifying the radio-frequency signal of the first frequency band.

3. The radio frequency system according to claim 1 or 2, characterized in that the radio frequency system further comprises:

4. The radio frequency system according to claim 3, further comprising:

5. The radio frequency system according to claim 4, further comprising:

and the antenna switch module is provided with two first ends and two second ends, wherein one first end is connected with the first radio frequency channel, the other first end is connected with the fourth radio frequency channel, one second end is connected with the first antenna, and the other second end is connected with the second antenna and used for controlling the first end and the second end of the antenna switch module to be in a conducting state.

6. The radio frequency system of claim 1, further comprising:

7. The radio frequency system according to claim 6, wherein the switch control circuit comprises a first switching device and a second switching device; wherein the first and second switching devices each have two first terminals and two second terminals; wherein:

the second switching device is used for controlling the first end and the second end of the second switching device to be in a conducting state;

the other first end of the second switch device is connected with the receiving path, and the other second end of the second switch device is connected with the fourth antenna.

8. The radio frequency system according to claim 5, wherein:

the first switching device is DP4T or 3P3T;

the second switching device is a DPDT.

9. A radio frequency communication method applied to the radio frequency system according to any one of claims 1 to 9, comprising:

10. The method of claim 9, wherein the controlling the second radio frequency path and the receive path each perform an antenna switching operation, comprising:

and sending a control signal to the switch control circuit, wherein the control signal is used for switching the conduction of the switch control circuit and one of the third antenna and the fourth antenna to the conduction of the other of the third antenna and the fourth antenna.