CN114142886B

CN114142886B - Radio frequency system and communication equipment

Info

Publication number: CN114142886B
Application number: CN202111447370.6A
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: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-01-03
Anticipated expiration: 2041-11-30
Also published as: CN114142886A

Abstract

The present application relates to a radio frequency system and a communication device. The radio frequency system includes: a radio frequency transceiver; the first transceiver circuit is used for supporting the transmission and receiving processing of the first low-frequency signal and supporting the receiving processing of the second low-frequency signal; the second transceiver circuit is used for supporting the transmission and receiving processing of a second low-frequency signal; the first receiving circuit is used for supporting receiving processing of the first low-frequency signal and the second low-frequency signal; the second receiving circuit is used for supporting receiving processing of the second low-frequency signal; the first transceiver circuit, the second transceiver circuit and the target receiving circuit are respectively configured to be switchably connected with the three antennas, and the target receiving circuit is the first receiving circuit or the second receiving circuit. The radio frequency system can support the downlink 4 x 4MIMO function of the second low-frequency signal and the downlink 2 x 2MIMO function of the first low-frequency signal, and the channel capacity of the radio frequency system and the receiving performance of the low-frequency signal can be improved in multiples.

Description

Radio frequency system and communication equipment

Technical Field

The present application relates to the field of antenna technologies, and in particular, to a radio frequency system and a communication device.

Background

With the development and advancement of technologies, mobile communication technologies are gradually beginning to be applied to communication devices, such as mobile phones and the like. With the development and progress of the technology, the 5G mobile communication technology is gradually beginning to be applied to electronic devices. The 5G mobile communication technology communication frequency is higher than that of the 4G mobile communication technology. The conventional radio frequency system has poor receiving performance for receiving 5G low-frequency signals (for example, N28 frequency band signals) in poor signal areas such as cell edges, building depths or elevators.

Disclosure of Invention

The embodiment of the application provides a radio frequency system and communication equipment, which can improve the receiving performance of low-frequency signals.

A radio frequency system, comprising:

a radio frequency transceiver;

the first transceiving circuit is connected with the radio frequency transceiver and is used for supporting the transmitting and receiving processing of a first low-frequency signal and supporting the receiving processing of a second low-frequency signal;

the second transceiving circuit is connected with the radio frequency transceiver and is used for supporting the transmission and receiving processing of the second low-frequency signal;

the first receiving circuit is connected with the radio frequency transceiver and is used for supporting receiving processing of the first low-frequency signal and the second low-frequency signal;

the second receiving circuit is connected with the radio frequency transceiver and is used for supporting receiving processing of the second low-frequency signal; wherein:

the frequency range of the first low-frequency signal is different from that of the second low-frequency signal;

the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit are respectively connected with an antenna, the connected antennas are different, the first transceiver circuit, the second transceiver circuit and the target receiving circuit are respectively configured to be switchably connected with three antennas, and the target receiving circuit is the first receiving circuit or the second receiving circuit.

A communication device comprising a radio frequency system as described above.

The radio frequency system comprises a radio frequency transceiver, a first transceiver circuit, a second transceiver circuit, a first receiving circuit and a second receiving circuit, wherein the first transceiver circuit is used for supporting the transmission and receiving processing of a first low-frequency signal and supporting the receiving processing of a second low-frequency signal; the second transceiver circuit is used for supporting the transmission and receiving processing of a second low-frequency signal; the first receiving circuit is used for supporting receiving processing of the first low-frequency signal and the second low-frequency signal; the second receiving circuit is configured to support receive processing of the second low frequency signal. Therefore, the radio frequency system can support the functions of transmitting the second low-frequency signal and receiving the downlink 4 x 4MIMO, and can support the functions of transmitting the first low-frequency signal and receiving the first low-frequency signal in two ways, and compared with the radio frequency system which can only support the reception of the 2 x 2MIMO low-frequency signal in the related art, the radio frequency system of the embodiment can simultaneously receive the low-frequency signals of two different frequency bands, the downlink receiving rate of one low-frequency signal can be doubled, the downlink coverage distance is doubled, and the channel capacity and the receiving performance of the radio frequency system can be doubled. In addition, the first transceiver circuit, the second transceiver circuit and the target receiving circuit are respectively configured to be switchably connected with the three antennas, and the target receiving circuit is the first receiving circuit or the second receiving circuit, so that the target antenna can transmit and receive a main set by the radio frequency system, uplink signals can be distributed on the antenna with better antenna efficiency, and the reliability of the uplink signals is ensured so as to improve the working communication performance of the radio frequency system.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of an embodiment of an RF system;

FIG. 2 is a second schematic diagram of an embodiment of an RF system;

FIG. 3 is a third schematic diagram of an exemplary RF system;

FIG. 4 is a fourth schematic diagram of an embodiment of a radio frequency system;

FIG. 5 is a fifth schematic diagram of an embodiment of a radio frequency system;

FIG. 6 is a sixth schematic diagram illustrating the structure of a receiver circuit according to an embodiment;

FIG. 7 is a seventh schematic diagram of an exemplary RF system;

FIG. 8 is an eighth schematic block diagram of an exemplary RF system;

FIG. 9 is a ninth block diagram illustrating an exemplary RF system;

fig. 10 is a schematic configuration diagram of a communication device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first client may be referred to as a second client, and similarly, a second client may be referred to as a first client, without departing from the scope of the present application. Both the first client and the second client are clients, but they are not the same client.

The radio frequency system according to the embodiment of the present application may be applied to a communication device with 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.

As shown in fig. 1, in one embodiment, a radio frequency system provided in the embodiment of the present application includes: the antenna comprises a radio frequency transceiver 10, a first transceiver circuit 20, a second transceiver circuit 30, a first receiving circuit 40, and a second receiving circuit 50 (fig. 1 illustrates a structure of the first transceiver circuit 20 connected to a first antenna ANT1, the second transceiver circuit 30 connected to a second antenna ANT2, the first receiving circuit 40 connected to a third antenna ANT3, and the second receiving circuit 50 connected to a fourth antenna ANT4, which is only an illustration and not a limitation).

In the present embodiment, the rf transceiver 10 may be configured with a plurality of ports to realize the connection with the first transceiver circuit 20, the second transceiver circuit 30, the first receiving circuit 40 and the second receiving circuit 50. Optionally, the radio frequency transceiver 10 includes a transmitter and a receiver, wherein the transmitter is configured to transmit low frequency signals to the first transceiver circuit 20 and the second transceiver circuit 30, and the receiver is configured to receive low frequency signals output by the first transceiver circuit 20, the second transceiver circuit 30, the first receiving circuit 40, and the second receiving circuit 50.

In the embodiment, the first transceiver circuit 20 is connected to the rf transceiver 10, and is configured to support a transmission and a reception process of a first low frequency signal and support a reception process of a second low frequency signal; the second transceiver circuit 30 is connected to the rf transceiver 10, and is configured to support transmitting and receiving processes of the second low-frequency signal; the first receiving circuit 40 is connected to the radio frequency transceiver 10, and is configured to support receiving processing of the first low frequency signal and the second low frequency signal; the second receiving circuit 50 is connected to the rf transceiver 10 for supporting the receiving process of the second low frequency signal.

And the frequency range of the first low-frequency signal is different from that of the second low-frequency signal. The first and second low frequency signals may be one of a 4G LTE low frequency signal and a 5G NR low frequency signal, respectively. The frequency band division of the low frequency signal is shown in table 1.

TABLE 1 frequency band division table for low frequency signals

It should be noted that, in the 5G network, the frequency band used by 4G is used, only the identifier before the serial number is changed, and the multiple low frequency bands of the low frequency signal are not limited to the above example.

Illustratively, the first low-frequency signal includes a radio-frequency signal in any one of N5, N8, N20, N28, B8, B26, B28, etc., and the second low-frequency signal includes a radio-frequency signal in any one of N5, N8, N20, N28, B8, B26, B28, etc., and the frequency ranges of the first low-frequency signal and the second low-frequency signal are different. Thus, the combination of the first low frequency signal and the second low frequency signal may be a 4G Dual low frequency NR Carrier Aggregation (CA) combination, a 5G Dual low frequency NRCA combination, and a Dual low frequency 4G radio access network and 5G NR Dual Connectivity (E-UTRA and New radio Dual Connectivity, endec) combination. For example, combinations may be combined into B8+ N20, B8+ N28, B28+ N5, B28+ N20, B20+ N8, B28+ N8, B5+ N28, and other ENDC combinations and N8+ N20, N8+ N28, N20+ N28, N28+ N5, and other NRCA combinations. It should be noted that, in the embodiment of the present application, specific frequency bands of the first low-frequency signal and the second low-frequency signal are not limited to the above example, and may also be low-frequency signals of other frequency bands.

The first transceiver circuit 20 includes a transmitting path and a receiving path, the transmitting path is configured to support outputting the first low-frequency signal output by the radio frequency transceiver 10 after performing power amplification, and the receiving path is configured to support outputting the received first low-frequency signal and the second low-frequency signal to the radio frequency transceiver 10 after performing low-noise amplification.

The second transceiving circuit 30 includes a transmitting path and a receiving path, the transmitting path is configured to support outputting the second low-frequency signal output by the radio frequency transceiver 10 after performing power amplification, and the receiving path is configured to support outputting the received second low-frequency signal to the radio frequency transceiver 10 after performing low-noise amplification.

The first receiving circuit 40 includes a receiving path, which is used to support low-noise amplification processing on the received first low-frequency signal and second low-frequency signal, so as to output the signals to the radio frequency transceiver 10; the second receiving circuit 50 includes a receiving path for supporting low noise amplification processing of the received second low frequency signal to output to the rf transceiver 10.

Therefore, the radio frequency system can support the functions of transmitting and receiving downlink 4 x 4mimo for the second low frequency signal and the functions of transmitting and receiving two paths of the first low frequency signal through the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40 and the second receiver circuit 50, and compared with the radio frequency system which can only support receiving 2 x 2mimo for the low frequency signal in the related art, the radio frequency system of this embodiment can simultaneously receive the low frequency signals of two different frequency bands, and the downlink receiving rate of one low frequency signal can be doubled, the downlink coverage distance is doubled, and the channel capacity and the receiving performance of the radio frequency system can be doubled. For example, if the first low-frequency signal is a B20 band signal and the second low-frequency signal is an N28 band signal, the radio frequency system may support the transmission and downlink 4 x 4mimo receiving functions of the N28 band signal and the transmission and downlink two receiving functions of the B20 band signal. The MIMO (Multiple Input Multiple Output, multiple receive) technology is to use Multiple transmit antennas and Multiple receive antennas at a transmit port and a receive port, respectively, to fully utilize spatial resources, and implement Multiple transmit and Multiple receive through Multiple antennas, so that channel capacity of a system can be doubled without increasing spectrum resources and antenna transmit power.

Optionally, the first transceiver circuitry 20 is configured to support a dominant set reception of the first low frequency signal and a dominant set MIMO reception of the second low frequency signal, the second transceiver circuitry 30 supports a dominant set reception of the second low frequency signal, the first receiver circuitry 40 supports diversity reception of the first low frequency signal and the second low frequency signal, and the second receiver circuitry 50 supports diversity MIMO reception of the second low frequency signal.

Optionally, the second transceiver circuit 30 is further configured to support a receiving process of the first low frequency signal, and the second receiver circuit 50 is further configured to support a receiving process of the first low frequency signal. Therefore, the radio frequency system supports the functions of transmitting the first low-frequency signal and receiving downlink 4 x 4MIMO, and supports the functions of transmitting the second low-frequency signal and receiving downlink 4 x 4 MIMO. Further alternatively, the reception processing of the first low frequency signal by the second transceiver circuit 30 is a main set MIMO reception processing, and the reception processing of the first low frequency signal by the second receiver circuit 50 is a diversity MIMO reception processing.

In the present embodiment, the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40, and the second receiver circuit 50 are respectively connected to one antenna, and the connected antennas are different, the first transceiver circuit 20, the second transceiver circuit 30, and the target receiver circuit are respectively configured to be switchably connected to three antennas, and the target receiver circuit is the first receiver circuit 40 or the second receiver circuit 50.

The antennas correspondingly connected to the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40 and the second receiver circuit 50 are all capable of supporting the transceiving of 4G LTE low-frequency signals and 5G NR low-frequency signals. Each branch antenna 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. In the present embodiment, the type of the antenna is not further limited.

When the first receiving circuit 40 is a target receiving circuit, the first transceiver circuit 20, the second transceiver circuit 30, and the first receiving circuit 40 are respectively configured to switchably connect three antennas, and the second receiving circuit 50 is fixedly connected to another antenna; when the second receiving circuit 50 is a target receiving circuit, the first transceiver circuit 20, the second transceiver circuit 30, and the second receiving circuit 50 are respectively configured to switchably connect three antennas, and the first receiving circuit 40 is fixedly connected to another antenna. The target receiving circuit may be determined according to the type of receiving processing of the low-frequency signal by the first receiving circuit 40 and the second receiving circuit 50, and optionally, the type of signal receiving processing of the target receiving circuit is diversity receiving processing.

The first transceiver circuit 20, the second transceiver circuit 30 and the target receiving circuit are respectively configured to be switchably connected to three antennas, so that the target antenna can perform transmitting and main set receiving, uplink signals can be distributed on an antenna with better antenna efficiency, and the reliability of the uplink signals is ensured to improve the communication performance of the radio frequency system.

The radio frequency system provided by the embodiment includes a radio frequency transceiver 10, a first transceiver circuit 20, a second transceiver circuit 30, a first receiving circuit 40, and a second receiving circuit 50, where the first transceiver circuit 20 is configured to support transmission and receiving processing of a first low frequency signal and support receiving processing of a second low frequency signal; the second transceiver circuitry 30 is configured to support transmit and receive processing of the second low frequency signal; the first receiving circuit 40 is configured to support a receiving process of the first low frequency signal and the second low frequency signal; the second receiving circuit 50 is used to support the receiving process of the second low frequency signal. Therefore, the radio frequency system can support the functions of transmitting the second low-frequency signal and receiving the downlink 4 x 4MIMO, and support the functions of transmitting the first low-frequency signal and receiving the first low-frequency signal in two paths, and compared with the radio frequency system which can only support the reception of the low-frequency signal 2 x 2MIMO in the related art, the radio frequency system of the embodiment can simultaneously receive the low-frequency signals of two different frequency bands, the downlink receiving rate of one low-frequency signal can be doubled, the downlink coverage distance can be doubled, and the channel capacity and the receiving performance of the radio frequency system can be doubled. In addition, the first transceiver circuit 20, the second transceiver circuit 30 and the target receiving circuit are respectively configured to switchably connect three antennas, and the target receiving circuit is the first receiving circuit 40 or the second receiving circuit 50, so that the radio frequency system can enable the target antenna to perform transmission and main set reception, can distribute uplink signals on antennas with better antenna efficiency, and ensure the reliability of the uplink signals to improve the communication performance of the radio frequency system.

In one embodiment, as shown in fig. 2, the first transceiver circuit 20, the second transceiver circuit 30 and the first receiver circuit 40 are respectively configured to be switchably connected to the first antenna ANT1, the second antenna ANT2 and the third antenna ANT3, and the second receiver circuit 50 is connected to the fourth antenna ANT4. Therefore, the antenna switching function is supported among the first antenna ANT1, the second antenna ANT2 and the third antenna ANT3, a target antenna can be selected from the first antenna ANT1, the second antenna ANT2 and the third antenna ANT3 to perform transmitting and main set receiving, and the communication performance of the work of a radio frequency system is improved.

Optionally, the antenna efficiency of the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3 is higher than that of the fourth antenna ANT 4; wherein: the radio frequency transceiver 10 is configured to configure a first target antenna connected to the first transceiver circuit 20 according to the network information of the first low frequency signal received by the first transceiver circuit 20 and the first receiving circuit 40, where the first target antenna is one of the first antenna ANT1, the second antenna ANT2, and the third antenna ANT 3; or the rf transceiver 10 is configured to configure a second target antenna connected to the second transceiver circuit 30 according to the network information of the second low frequency signal received by the second transceiver circuit 30 and the first receiver circuit 40, where the second target antenna is one of the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3. Therefore, uplink signals can be distributed on the first antenna ANT1, the second antenna ANT2 and the third antenna ANT3 which have better antenna efficiency, and the reliability of the uplink signals can be ensured so as to improve the working communication performance of a radio frequency system.

The network information may include raw and processed information associated with wireless performance metrics of the Received low frequency Signal, such as Signal Strength, received Power, reference Signal Received Power (RSRP), received Signal Strength (RSSI), signal to Noise Ratio (SNR), rank of MIMO channel matrix (Rank), carrier to Interference and Noise Ratio (RS-CINR), frame error rate, bit error rate, reference Signal Reception Quality (RSRQ), and the like. Further alternatively, the radio frequency transceiver 10 may store in advance configuration information of connection of each circuit with each antenna. The configuration information may include identification information of the antenna, identification information of each circuit, and control logic information of each switch on the radio frequency path between the first transceiver circuit 20, the second transceiver circuit 30, and the first receiver circuit 40 and the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3, respectively.

The following description will be made by taking network information as received signal strength:

optionally, the radio frequency transceiver 10 is configured to configure a first target antenna connected to the first transceiver circuit 20 according to the network information of the first low frequency signal received by the first transceiver circuit 20 and the first receiving circuit 40; wherein: the first antenna ANT1 is configured as a first target antenna, the third antenna ANT3 is configured as a default antenna connected to the first receiving circuit, and if the difference between the second signal strength of the first low-frequency signal received by the third antenna ANT3 and the first signal strength of the first low-frequency signal received by the first antenna ANT1 is greater than or equal to a preset threshold value in a preset time period, the third antenna ANT3 is configured as the first target antenna.

Specifically, when the first antenna ANT1 is configured as a first target antenna of the first low frequency signal, the third antenna ANT3 may be configured as a default antenna of the first receiving circuit 40, and the radio frequency transceiver 10 controls switching of the antennas according to a first signal strength of the first low frequency signal received by the first antenna ANT1 and a second signal strength of the first low frequency signal received by the third antenna ANT3 through the first transceiving circuit 20 and the first receiving circuit 40, respectively. More specifically, if the difference between the second received signal strength and the first received signal strength is greater than or equal to the preset threshold value within the preset time, the third antenna ANT3 is used as the first target antenna. After the target antenna is determined, the radio frequency transceiver 10 may control a relevant logic switch of the radio frequency system to turn on a transceiving path between the third antenna ANT3 and the first transceiving circuit 20, so as to implement transmission and main set reception of the first low frequency signal by using the third antenna ANT3, so as to improve communication quality of the low frequency signal. If the difference is smaller than the preset threshold, the first antenna ANT1 is continuously used as the first target antenna, and the current working state is maintained.

The preset threshold values are all numerical values larger than zero, and the size of the preset threshold values can be set according to needs. By setting the judgment condition of the preset threshold, frequent switching between the antennas caused by the fact that the signal receiving strength of the antennas is likely to be constantly changing can be prevented, and further the influence of the transmission efficiency of the antennas can be reduced.

Optionally, the radio frequency transceiver 10 is configured to configure a second target antenna connected to the second transceiver circuit 30 according to the network information of the second low frequency signal received by the second transceiver circuit 30 and the first receiving circuit 40; wherein: the second antenna ANT2 is configured as a second target antenna, the third antenna ANT3 is configured as a default antenna connected to the first receiving circuit 40, and if a difference between a fourth signal strength of the second low-frequency signal received by the third antenna ANT3 and a third signal strength of the second low-frequency signal received by the second antenna ANT2 is greater than or equal to a preset threshold within a preset time period, the third antenna ANT3 is configured as the second target antenna. The specific process of configuring the second target antenna by the radio frequency transceiver 10 may refer to the specific process of configuring the first target antenna by the radio frequency transceiver 10, which is not described herein again.

Optionally, as shown in fig. 2, the radio frequency system further includes:

the switching circuit 60 is connected to the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40, the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3, respectively, and is configured to switchably connect the first transceiver circuit 20, the second transceiver circuit 30, and the first receiver circuit 40 to the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3.

By setting the switching circuit 60, the first transceiver circuit 20, the second transceiver circuit 30, and the first receiver circuit 40 may be selectively connected to the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3 in a switchable manner, the first target antenna or the second target antenna may be determined from the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3, and the first switching circuit 60 may be controlled to enable the target antenna to perform transmission and main set reception, so as to distribute uplink signals on an antenna with better antenna efficiency, thereby ensuring reliability of uplink signals and improving communication performance of the radio frequency system.

Alternatively, as shown in fig. 3, the switching circuit 60 may be a three-pole three-throw switch 3P3T, three first ends of the three-pole three-throw switch are respectively connected to the first transceiver circuit 20, the second transceiver circuit 30, and the first receiver circuit 40 in a one-to-one correspondence manner, and three second ends of the three-pole three-throw switch 3P3T are respectively connected to the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3 in a one-to-one correspondence manner, so that the three-pole three-throw switch 3P3T realizes that the first transceiver circuit 20, the second transceiver circuit 30, and the first receiver circuit 40 are switchably connected to the first antenna ANT1, the second antenna ANT2, and the third antenna ANT3.

In one embodiment, as shown in fig. 4 (fig. 4 illustrates, by way of illustration and not limitation, a structure in which a first transceiver circuit 20 is connected to a first antenna ANT1, a second transceiver circuit 30 is connected to a second antenna ANT2, a first receiver circuit 40 is connected to a third antenna ANT3, and a second receiver circuit 50 is connected to a fourth antenna ANT 4), the first transceiver circuit 20 includes: a first transmit amplification module 210, a first receive amplification module 220, and a first filtering module 230.

The first transmission amplifying module 210 is connected to the radio frequency transceiver 10, and is configured to amplify the power of the first low-frequency signal output by the radio frequency transceiver 10, so as to implement transmission processing of the first low-frequency signal. Specifically, the first transmit amplifying module 210 includes a first power amplifier 211. The output end of the first power amplifier 211 serves as the output end of the first transmit amplifying module 210, and the input end of the first power amplifier 211 serves as the input end of the first transmit amplifying module 210, which can achieve power amplification processing on the first low-frequency signal. In this embodiment of the application, the first transmit Amplifier Module 210 may be a multi-mode multi-band Power Amplifier (MMPA), which is abbreviated as an MMPA device.

The first receiving and amplifying module 220 is connected to the radio frequency transceiver 10, and configured to perform low noise amplification processing on the received signal to output the signal to the radio frequency transceiver 10, so as to implement receiving processing on the first low frequency signal and the second low frequency signal. The first receiving amplifying module 220 may include a first low noise amplifier 221, wherein an input terminal of the first low noise amplifier 221 is used as an input terminal of the first receiving amplifying module 220, and an output terminal of the first low noise amplifier 221 is used as an output terminal of the first receiving amplifying module 220. The first low-noise amplifier 221 may perform low-noise amplification processing on the first low-frequency signal and the second low-frequency signal. In the embodiment of the present application, the first receiving and amplifying module 220 may be an External Low Noise Amplifier (ela), which is referred to as an ela device for short.

The first filtering module 230 is respectively connected to the output end of the first transmitting and amplifying module 210, the input end of the first receiving and amplifying module 220, and a branch antenna (the first antenna ANT1 is taken as an example in the figure), and is configured to filter the signal output by the first transmitting and amplifying module 210 to output the signal to the branch antenna, and filter the first low-frequency signal and the second low-frequency signal received by the branch antenna to output the signal to the first receiving and amplifying module 220, so as to output the first low-frequency signal and the second low-frequency signal to the first receiving and amplifying module 220. The first filtering module 230 may include a first triplexer 231. One of three first terminals of the first triplexer 231 is connected to the output terminal of the first power amplifier 211, the other two first terminals of the first triplexer 231 are respectively connected to the input terminal of the first low noise amplifier 221, and the second terminal (i.e., the common terminal) of the first triplexer 231 is connected to the antenna. The first triplexer 231 may filter the received signal to remove the stray waves, and only output the first low frequency signal and the second low frequency signal. For example, if the frequency ranges of the first low frequency signal and the second low frequency signal are relatively close, the first filtering module 230 may be a duplexer. In the embodiment of the present application, specific components of the first filtering module 230 are not further limited.

Specifically, the first low-frequency signal output by the radio frequency transceiver 10 is power-amplified by the first transmission amplification module 210 and then output to the first triplexer 231, and is filtered by the first triplexer 231 and then output to the antenna, so as to implement transmission processing of the first low-frequency signal. In addition, the antenna may receive the first low frequency signal and the second low frequency signal, and output the first low frequency signal and the second low frequency signal to the first triplexer 231 for filtering processing, so as to output the first low frequency signal and the second low frequency signal without stray waves to the first receiving and amplifying module 220, and output the first low frequency signal and the second low frequency signal to the radio frequency transceiver 10 after the first receiving and amplifying module 220 performs low noise amplification processing on the first low frequency signal and the second low frequency signal, so as to implement receiving processing on the first low frequency signal and the second low frequency signal.

In one embodiment, as shown in fig. 4, the second transceiver circuit 30 includes: a second transmitting and amplifying module 310, a second receiving and amplifying module 320, and a second filtering module 330.

The second transmitting and amplifying module 310 is connected to the radio frequency transceiver 10, and is configured to amplify the power of the second low-frequency signal output by the radio frequency transceiver 10, so as to implement transmitting processing of the second low-frequency signal. Specifically, the second transmit amplifying module 310 includes a second power amplifier 311. The output end of the second power amplifier 311 serves as the output end of the second transmission amplifying module 310, and the input end of the second power amplifier 311 serves as the input end of the second transmission amplifying module 310, which can achieve power amplification processing on the second low-frequency signal. In this embodiment, the second transmitting and amplifying module 310 may be an MMPA device.

The second receiving and amplifying module 320 is connected to the radio frequency transceiver 10, and configured to perform low noise amplification processing on the received signal to output the signal to the radio frequency transceiver 10, so as to implement receiving processing on the signal received by the second receiving and amplifying module 320. Specifically, the second receiving and amplifying module 320 may include a second low noise amplifier 321. The input end of the second low noise amplifier 321 is used as the input end of the second receiving and amplifying module 320, and the output end of the second low noise amplifier 321 is used as the output end of the second receiving and amplifying module 320. The second low noise amplifier 321 can implement a low noise amplification process on the received signal. In the embodiment of the present application, the second receiving and amplifying module 320 may be an ela device.

The second filtering module 330 is connected to the output end of the second transmitting amplifying module 310, the input end of the second receiving amplifying module 320, and one antenna (in the figure, the second antenna ANT2 is taken as an example), and is configured to filter the signal output by the second transmitting amplifying module 310 to output to the one antenna, and also filter the second low-frequency signal received by the one antenna to output to the second receiving amplifying module 320. The second filtering module 330 may include a duplexer 331, wherein two first ends of the duplexer 331 are respectively connected to the output end of the second power amplifier 311 and the input end of the second low noise amplifier 321 in a one-to-one correspondence manner, and a second end of the duplexer 331 is connected to the antenna. The duplexer 331 may filter the received signal to filter out the stray waves and output only the second low frequency signal.

Specifically, the second low-frequency signal output by the radio frequency transceiver 10 is power-amplified by the second transmitting and amplifying module 310, and then output to the duplexer 331, and is filtered by the duplexer 331 and then output to the antenna, so as to implement transmitting the second low-frequency signal. In addition, the antenna can receive the second low frequency signal and output the second low frequency signal to the duplexer 331 for filtering, so as to output the second low frequency signal without stray waves to the second receiving and amplifying module 320, and output the second low frequency signal to the radio frequency transceiver 10 after the second receiving and amplifying module 320 performs low noise amplification processing on the second low frequency signal, so as to implement receiving processing on the second low frequency signal.

Optionally, the second transceiver circuit 30 is further configured to support a receiving process of the first low-frequency signal, and the second receiver circuit 50 is further configured to support a receiving process of the first low-frequency signal; wherein: the second filtering module 330 is further configured to filter the first low-frequency signal received by one antenna to output the first low-frequency signal to the second receiving and amplifying module 320. Thus, the second filtering module 330 may filter the received first low frequency signal and the second low frequency signal to filter the stray waves, and output only the first low frequency signal and the second low frequency signal. As shown in fig. 5, the second filtering module 330 may include a second triplexer 332, wherein one of three first terminals of the second triplexer 332 is connected to the output terminal of the second power amplifier 311, the other two of the three first terminals of the second triplexer 332 are respectively connected to the input terminals of the second low noise amplifier 321, and a second terminal (i.e., a common terminal) of the second triplexer 332 is connected to the antenna. The second triplexer 332 may filter the received first low-frequency signal and the second low-frequency signal to filter the stray waves, and only output the first low-frequency signal and the second low-frequency signal. For example, if the frequency ranges of the first low-frequency signal and the second low-frequency signal are relatively close, the second filtering module 330 may be a duplexer. In the embodiment of the present application, specific components of the second filtering module 330 are not further limited.

Optionally, in the above embodiment, at least two of the first Power amplifier 211, the first Low noise amplifier 221, the first triplexer 231 in the first transceiver circuit 20 and the second Power amplifier 311, the second Low noise amplifier 321, and the Duplexer 331 (or the second triplexer 332) in the second transceiver circuit 30 may be integrated into a radio frequency Module, for example, a Low Band amplifier integrated multiplexer With Low noise amplifier (L-PA MID) Module, abbreviated as an L-PA MID device. For example, if the first power amplifier 211, the first low noise amplifier 221, the second power amplifier 311, the second low noise amplifier 321, the first triplexer 231, and the duplexer 331 (or the second triplexer 332) are integrated into the L-PA MID device, the integration level of the radio frequency system may be improved, the occupied area may be reduced, and the package may be only needed once, which may reduce the cost.

Alternatively, the first power amplifier 211, the first low noise amplifier 221, the second power amplifier 311, the second low noise amplifier 321, the first triplexer 231, and the duplexer 331 (or the second triplexer 332) may also be discrete devices. In the embodiment of the present application, the integration manner of each device in the first transceiver circuit 20 and the second transceiver circuit 30 is not further limited.

In one embodiment, as shown in fig. 6 (fig. 6 is a basic embodiment of the embodiment of fig. 4, and is illustrated by the structures of the first transceiver circuit 20 connected to the first antenna ANT1, the second transceiver circuit 30 connected to the second antenna ANT2, the first receiver circuit 40 connected to the third antenna ANT3, the second receiver circuit 50 connected to the fourth antenna ANT4, which is only schematic and not limited), the first receiver circuit 40 includes: a third filtering module 410 and a third receiving and amplifying module 420.

A third filtering module 410, connected to one antenna (in the figure, the third antenna ANT3 is taken as an example), for performing filtering processing on the first low-frequency signal and the second low-frequency signal received by the one antenna; the third receiving and amplifying module 420 is connected to the radio frequency transceiver 10 and the third filtering module 410, respectively, and configured to perform low noise amplification processing on the filtered first low frequency signal and the filtered second low frequency signal to output the signals to the radio frequency transceiver 10. Wherein, the third filtering module 410 may include a filter to implement the filtering process on the first low frequency signal and the second low frequency signal; the third receiving and amplifying module 420 may include a third low noise amplifier 421, an input end of the third low noise amplifier 421 is connected to the other end of the third filtering module 410, and an output end of the third low noise amplifier 421 is connected to the radio frequency transceiver 10, so as to implement receiving processing on the first low frequency signal and the second low frequency signal.

In one embodiment, as shown in fig. 6, the second receiving circuit 50 includes: a fourth filtering module 510 and a fifth receiving and amplifying module 520.

A fourth filtering module 510, connected to one antenna (in the figure, the fourth antenna ANT4 is taken as an example), for performing filtering processing on the second low-frequency signal received by the one antenna; the fifth receiving and amplifying module 520 is respectively connected to the rf transceiver 10 and the fourth filtering module 510, and is configured to perform low noise amplification processing on the signal output by the fourth filtering module 510 to output the signal to the rf transceiver 10. The fourth filtering module 510 may include a filter to implement the filtering process on the second low-frequency signal; the fifth receiving and amplifying module 520 may include a fourth low noise amplifier 521, wherein an input end of the fourth low noise amplifier 521 is connected to the other end of the fourth filtering module 510, and an output end of the fourth low noise amplifier 521 is connected to the radio frequency transceiver 10, so as to implement receiving processing on the second low frequency signal.

Optionally, as shown in fig. 7 (fig. 7 is based on the embodiment of fig. 5), the second transceiver circuit 30 is further configured to support a receiving process on the first low-frequency signal, and the second receiving circuit 50 is further configured to support a receiving process on the first low-frequency signal; wherein: the fourth filtering module 510 is further configured to filter the first low-frequency signal received by one antenna to output the first low-frequency signal to the fifth receiving and amplifying module 520, so that the fifth receiving and amplifying module 520 performs low-noise amplification on the first low-frequency signal and outputs the first low-frequency signal to the radio frequency transceiver 10.

Optionally, in the above embodiment, each module included in the first receiving circuit 40 and the second receiving circuit 50 may be integrated into the same receiving device, and the receiving device may be a radio frequency amplifier front end module (LFEM), which is referred to as LFEM device for short. May be used to support receive processing of low frequency signals (e.g., 4G LTE signals including at least one low frequency band and 5G NR signals including at least one low frequency band). In this embodiment, the first receiving circuit 40 and the second receiving circuit 50 may be the LFEM devices, and by providing the LFEM devices, the integration level of the radio frequency system may be improved, the occupied space of the radio frequency system may be reduced, and the miniaturization design of the radio frequency system may be facilitated.

Based on the rf system shown in fig. 7, taking the first low-frequency signal as the B20 signal and the second low-frequency signal as the N28 signal as an example, the transmission and four-way reception of the first low-frequency signal and the transmission and four-way reception of the second low-frequency signal will be described.

A first transmission path: the rf transceiver 10 outputs a B20 signal to the first power amplifier 211, amplifies the signal by the first power amplifier 211, filters an out-of-band signal by the first triplexer 231, and outputs the filtered out-of-band signal to the first antenna ANT1 through the common terminal of the first triplexer 231.

A second transmission path: the rf transceiver 10 outputs the N28 signal to the second power amplifier 311, performs signal amplification through the second power amplifier 311, filters the out-of-band signal through the second triplexer 332, and outputs the out-of-band signal to the second antenna ANT2 through the common terminal of the second triplexer 332.

A first reception path: the B20 signal and the N28 signal in the space received by the first antenna ANT1 enter the first triplexer 231, the first triplexer 231 filters the out-of-band signal, the filtered out-of-band signal is output to the first low noise amplifier 221 through the common terminal of the first triplexer 231, the B20 signal and the N28 signal are subjected to low noise amplification, and finally the amplified signals are output to the radio frequency transceiver 10, so as to implement first Path Reception (PRX) of the B20 signal and third path signal reception (PRX MIMO) of the N28 signal.

A second reception path: the N28 signal in the space received by the second antenna ANT2, the N28 signal enters the duplexer 331, the out-of-band signal is filtered by the duplexer 331, and then the filtered out-of-band signal is output to the second low noise amplifier 321 through the duplexer 331, and the N28 signal is low noise amplified and finally output to the radio frequency transceiver 10, so as to implement third path reception (PRX MIMO) for the B20 signal and first Path Reception (PRX) for the N28 signal.

A third reception path: the B20 signal and the N28 signal in the space received by the third antenna ANT3, where the B20 signal and the N28 signal enter the third filtering module 410, the out-of-band signal is filtered by the third filtering module 410, and then output to the third low noise amplifier 421, where the B20 signal and the N28 signal are subjected to low noise amplification, and finally output to the radio frequency transceiver 10, so as to implement second path reception (DRX) on the B20 signal and the N28 signal.

A fourth reception path: the B20 signal and the N28 signal in the space received by the fourth antenna ANT4, and the B20 signal and the N28 signal enter the fourth filtering module 510, are filtered by the fourth filtering module 510, and then output to the fourth low noise amplifier 521, perform low noise amplification processing on the B20 signal and the N28 signal, and finally output to the radio frequency transceiver 10, so as to implement fourth receiving (DRX MIMO) on the B20 signal and the N28 signal.

The explanation of the two-way reception and the two-way transmission of the first low-frequency signal, and the four-way reception and the transmission of the second low-frequency signal of the radio frequency system shown in fig. 6 can be referred to the relevant explanation of the radio frequency system shown in fig. 7, and are not described herein again.

In one embodiment, the antenna efficiency of one antenna connected to the third filtering module 410 is lower than the antenna efficiency of the antenna connected to the first transceiver circuit 20 and the antenna efficiency of the antenna connected to the second transceiver circuit 30; as shown in fig. 8 and 9 (fig. 8 and 9 are schematic, but not limited to, configurations of the first transceiver circuit 20 connected to the first antenna ANT1, the second transceiver circuit 30 connected to the second antenna ANT2, the first receiver circuit 40 connected to the third antenna ANT3, and the second receiver circuit 50 connected to the fourth antenna ANT 4), the first receiver circuit 40 further includes:

the fourth receiving and amplifying module 430 is connected to the third receiving and amplifying module 420 and the third filtering module 410, respectively, and is configured to perform low noise amplification processing on the filtered first low frequency signal and the filtered second low frequency signal to output the first low frequency signal and the second low frequency signal to the third receiving and amplifying module 420.

The fourth receiving and amplifying module 430 may include a fifth low noise amplifier 431. Specifically, the input end of the fifth low noise amplifier 431 is connected to the output end of the third filtering module 410, and the output end of the fifth low noise amplifier 431 is connected to the input end of the third low noise amplifier 421, so as to cooperate with the third low noise amplifier 421 to perform amplification processing on the first low frequency signal and the second low frequency signal twice, which can improve the receiving performance of the first receiving circuit 40, and avoid the problems of low efficiency and large insertion loss of first-level noise amplification caused by environmental problems. It should be noted that the fourth receiving and amplifying module 430 may be disposed on the radio frequency path between the third receiving and amplifying module 420 and the third filtering module 410, or disposed on the radio frequency path between the third receiving and amplifying module 420 and the radio frequency transceiver 10.

In one embodiment, the antenna efficiency of one antenna connected to the fourth filtering module 510 is lower than the antenna efficiency of the antenna connected to the first transceiver circuit 20 and the antenna efficiency of the antenna connected to the second transceiver circuit 30, respectively; as shown in fig. 8 and 9, the second receiving circuit 50 further includes:

the sixth receiving and amplifying module 530 is respectively connected to the fifth receiving and amplifying module 520 and the fourth filtering module 510, and is configured to perform low noise amplification processing on the signal output by the fourth filtering module 510 to output the signal to the fifth receiving and amplifying module 520.

Wherein, the sixth receiving and amplifying module 530 may include a sixth low noise amplifier 531. Specifically, the input end of the sixth low noise amplifier 531 is connected to the output end of the fourth filtering module 510, and the output end of the sixth low noise amplifier 531 is connected to the input end of the fourth low noise amplifier 521, so as to perform amplification processing twice on the signal output by the fourth filtering module 510 in cooperation with the fourth low noise amplifier 521, which can improve the receiving performance of the second receiving circuit 50, and avoid the problems of low efficiency and large insertion loss of first-stage noise amplification caused by environmental problems. It should be noted that the sixth receiving and amplifying module 530 may be disposed on the rf path between the fifth receiving and amplifying module 520 and the fourth filtering module 510, or disposed on the rf path between the fifth receiving and amplifying module 520 and the rf transceiver 10.

For convenience of explanation, based on the radio frequency system shown in fig. 8, the signal receiving process of the third and fourth receiving paths of the first and second low-frequency signals in this embodiment is explained:

a third reception path: the third antenna ANT3 receives the first low frequency signal and the second low frequency signal in the space, and outputs the first low frequency signal and the second low frequency signal to the third filtering module 410 for filtering, and the first low frequency signal and the second low frequency signal after filtering are subjected to secondary low noise amplification by the fifth low noise amplifier 431 and the third low noise amplifier 421, and finally output to the radio frequency transceiver 10.

A fourth reception path: the fourth antenna ANT4 receives the second low-frequency signal in the space, and outputs the second low-frequency signal to the fourth filtering module 410 for filtering, and the second low-frequency signal after filtering passes through the sixth low-noise amplifier 531 and the fourth low-noise amplifier 521 to perform secondary low-noise amplification on the second low-frequency signal, and finally outputs the second low-frequency signal to the radio frequency transceiver 10.

For convenience of description, based on the radio frequency system shown in fig. 9, a signal receiving process of the third receiving path and the fourth receiving path of the first low frequency signal and the second low frequency signal in this embodiment is described:

a third reception path: the third antenna ANT3 receives the first low frequency signal and the second low frequency signal in the space, and outputs the first low frequency signal and the second low frequency signal to the third filtering module 410 for filtering, the first low frequency signal and the second low frequency signal after filtering are subjected to secondary low noise amplification by the fifth low noise amplifier 431 and the third low noise amplifier 421, and finally output the first low frequency signal and the second low frequency signal to the radio frequency transceiver 10.

A fourth reception path: the fourth antenna ANT4 receives the first low frequency signal and the second low frequency signal in the space, and outputs the first low frequency signal and the second low frequency signal to the fourth filtering module 410 for filtering, and the first low frequency signal and the second low frequency signal after filtering pass through the sixth low noise amplifier 531 and the fourth low noise amplifier 521 to perform secondary low noise amplification processing on the first low frequency signal and the second low frequency signal, and finally outputs the first low frequency signal and the second low frequency signal to the radio frequency transceiver 10.

It should be noted that, the foregoing description may be referred to for other receiving paths and transmitting paths, and thus, the description is omitted here.

As shown in fig. 10, further taking the communication device as a mobile phone 11 as an example, specifically, as shown in fig. 10, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral device interface 23, a radio frequency system 24, and an input/output (I/O) subsystem 26. These components optionally communicate over one or more communication buses or signal lines 29. Those skilled in the art will appreciate that the handset 11 shown in fig. 10 is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. The various components shown in fig. 9 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.

The memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in memory 21 include an operating system 211, a communications module (or set of instructions) 212, a Global Positioning System (GPS) module (or set of instructions) 213, and the like.

The processor 22 and other control circuitry, such as control circuitry in the radio frequency system 24, may be used to control the operation of the handset 11. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management modules, audio codec chips, application specific integrated circuits, and the like.

The processor 22 may be configured to implement a control algorithm that controls the use of the antenna in the handset 11. The processor 22 may also issue control commands for controlling various switches in the radio frequency system 24, and the like.

The I/O subsystem 26 couples input/output peripheral devices on the cell phone 11, such as a keypad and other input control devices, to the peripheral device interface 23. The I/O subsystem 26 optionally includes a touch screen, buttons, tone generators, accelerometers (motion sensors), ambient and other sensors, light emitting diodes and other status indicators, data ports, and the like. Illustratively, a user may control the operation of the handset 11 by supplying commands through the I/O subsystem 26, and may receive status information and other outputs from the handset 11 using the output resources of the I/O subsystem 26. For example, a user pressing button 261 may turn the phone on or off.

The rf system 24 may be any of the rf systems described in any of the preceding embodiments.

In the description herein, reference to the description of "one of the embodiments," "optionally," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A radio frequency system, comprising:

a radio frequency transceiver;

the first transceiver circuit, the second transceiver circuit, the first receiver circuit and the second receiver circuit are respectively connected with a branch antenna, and the branch antennas connected with the first transceiver circuit, the second transceiver circuit, the first receiver circuit and the second receiver circuit are different, wherein the first transceiver circuit, the second transceiver circuit and the target receiver circuit are respectively configured to be switchably connected with three branch antennas, and the target receiver circuit is the first receiver circuit or the second receiver circuit.

2. The radio frequency system of claim 1, wherein the first transceiver circuit, the second transceiver circuit, and the first receiver circuit are configured to switchably connect a first antenna, a second antenna, and a third antenna, respectively, and the second receiver circuit is connected to a fourth antenna.

3. The radio frequency system according to claim 2, wherein the antenna efficiency of the first antenna, the second antenna and the third antenna is higher than the antenna efficiency of the fourth antenna; wherein:

the radio frequency transceiver is used for configuring a first target antenna connected to the first transceiver circuit according to the network information of the first low-frequency signal received by the first transceiver circuit and the first receiving circuit, wherein the first target antenna is one of the first antenna, the second antenna and the third antenna; or

The radio frequency transceiver is configured to configure a second target antenna connected to the second transceiver circuit according to the network information of the second low-frequency signal received by the second transceiver circuit and the first receiving circuit, where the second target antenna is one of the first antenna, the second antenna, and the third antenna.

4. The rf system of claim 3, wherein the rf transceiver is configured to configure a first target antenna connected to the first transceiver circuit according to the network information of the first low-frequency signal received by the first transceiver circuit and the first receiving circuit, and comprises:

the first antenna is configured as the first target antenna, the third antenna is configured as a default antenna connected to the first receiving circuit, and if a difference between a second signal strength of the first low-frequency signal received by the third antenna and a first signal strength of the first low-frequency signal received by the first antenna is greater than or equal to a preset threshold within a preset time period, the third antenna is configured as the first target antenna.

5. The radio frequency system according to claim 3, wherein the radio frequency transceiver is configured to configure a second target antenna connected to the second transceiver circuit according to the network information of the second low frequency signal received by the second transceiver circuit and the first receiving circuit, and comprises:

the second antenna is configured as the second target antenna, the third antenna is configured as a default antenna connected to the first receiving circuit, and if a difference between a fourth signal strength of the second low-frequency signal received by the third antenna and a third signal strength of the second low-frequency signal received by the second antenna is greater than or equal to a preset threshold within a preset time period, the third antenna is configured as the second target antenna.

6. The radio frequency system of claim 2, further comprising:

and a switching circuit, connected to the first transceiver circuit, the second transceiver circuit, the first receiver circuit, the first antenna, the second antenna, and the third antenna, respectively, for switchably connecting the first transceiver circuit, the second transceiver circuit, and the first receiver circuit to the first antenna, the second antenna, and the third antenna.

7. The radio frequency system according to claim 1, wherein the first transceiver circuit comprises:

the first transmitting and amplifying module is connected with the radio frequency transceiver and used for amplifying the power of the first low-frequency signal output by the radio frequency transceiver;

the first receiving and amplifying module is connected with the radio frequency transceiver and used for carrying out low-noise amplification processing on the received signal so as to output the signal to the radio frequency transceiver;

the first filtering module is respectively connected with the output end of the first transmitting amplification module, the input end of the first receiving amplification module and one antenna, and is used for filtering the signal output by the first transmitting amplification module so as to output the signal to the one antenna, and filtering the first low-frequency signal and the second low-frequency signal received by the one antenna so as to output the signal to the first receiving amplification module.

8. The radio frequency system according to claim 1, wherein the second transceiver circuit comprises:

the second transmitting and amplifying module is connected with the radio frequency transceiver and is used for amplifying the power of the second low-frequency signal output by the radio frequency transceiver;

the second receiving and amplifying module is connected with the radio frequency transceiver and used for carrying out low-noise amplification processing on the received signals so as to output the signals to the radio frequency transceiver;

and the second filtering module is respectively connected with the output end of the second transmitting amplification module, the input end of the second receiving amplification module and one antenna, and is used for filtering the signal output by the second transmitting amplification module so as to output the signal to the one antenna and also used for filtering the second low-frequency signal received by the one antenna so as to output the signal to the second receiving amplification module.

9. The radio frequency system according to claim 8, wherein the second transceiver circuit is further configured to support a reception process for the first low frequency signal, and the second receiver circuit is further configured to support a reception process for the first low frequency signal; wherein:

the second filtering module is further configured to perform filtering processing on the first low-frequency signal received by the one antenna to output the first low-frequency signal to the second receiving and amplifying module.

10. The radio frequency system according to claim 1, wherein the first receiving circuit comprises:

the third filtering module is connected with one antenna and used for filtering the first low-frequency signal and the second low-frequency signal received by the one antenna;

and the third receiving and amplifying module is respectively connected with the radio frequency transceiver and the third filtering module and is used for performing low-noise amplification processing on the filtered first low-frequency signal and the filtered second low-frequency signal so as to output the signals to the radio frequency transceiver.

11. The rf system according to claim 10, wherein the antenna efficiency of the antenna connected to the third filtering module is lower than the antenna efficiency of the antenna connected to the first transceiver circuit and the antenna efficiency of the antenna connected to the second transceiver circuit, respectively; the first receiving circuit further comprises:

and the fourth receiving and amplifying module is respectively connected with the third receiving and amplifying module and the third filtering module and is used for performing low-noise amplification processing on the filtered first low-frequency signal and the filtered second low-frequency signal so as to output the processed first low-frequency signal and the filtered second low-frequency signal to the third receiving and amplifying module.

12. The radio frequency system according to claim 1, wherein the second receiving circuit comprises:

the fourth filtering module is connected with one antenna and used for filtering the second low-frequency signal received by the one antenna;

and the fifth receiving and amplifying module is respectively connected with the radio frequency transceiver and the fourth filtering module and is used for performing low-noise amplification processing on the signal output by the fourth filtering module so as to output the signal to the radio frequency transceiver.

13. The rf system of claim 12, wherein the second transceiver circuit is further configured to support receive processing of the first low frequency signal, and the second receiver circuit is further configured to support receive processing of the first low frequency signal; wherein:

the fourth filtering module is further configured to perform filtering processing on the first low-frequency signal received by the antenna to output the first low-frequency signal to the fifth receiving and amplifying module.

14. The rf system according to claim 12 or 13, wherein the antenna efficiency of the antenna connected to the fourth filtering module is lower than the antenna efficiency of the antenna connected to the first transceiver circuit and the antenna efficiency of the antenna connected to the second transceiver circuit, respectively; the second receiving circuit further comprises:

and the sixth receiving and amplifying module is respectively connected with the fifth receiving and amplifying module and the fourth filtering module and is used for performing low-noise amplification processing on the signal output by the fourth filtering module so as to output the signal to the fifth receiving and amplifying module.

15. A communication device comprising a radio frequency system according to any of claims 1-14.