CN114124137B

CN114124137B - Radio frequency system and communication equipment

Info

Publication number: CN114124137B
Application number: CN202111444128.3A
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: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-07-14
Anticipated expiration: 2041-11-30
Also published as: CN114124137A

Abstract

The application relates to a radio frequency system and a communication device, the radio frequency system comprises a radio frequency transceiver, a transceiver circuit, a main set receiving circuit, a main set MIMO receiving circuit and a diversity receiving circuit, the transceiver circuit and the main set receiving circuit are configured to be connected with the same antenna, the transceiver circuit, the main set MIMO receiving circuit and the diversity receiving circuit are respectively configured to be connected with different antennas, the transceiver circuit and a target receiving circuit are configured to be switchably connected with at least two antennas, and the target receiving circuit comprises at least one of the main set MIMO receiving circuit and the diversity receiving circuit. When the radio frequency system is in the environment of good signal state, compared with the related art, the radio frequency system which can only support the 2 x 2MIMO receiving of the low frequency signal, the downlink communication rate can be doubled. If the radio frequency system is located in the weak signal environment, compared with the radio frequency system which can only support 2 x 2mimo reception of the low frequency signal in the related art, the diversity gain can be doubled, the coverage distance is doubled, and the reception performance is greatly improved.

Description

Radio frequency system and communication equipment

Technical Field

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

Background

With the development and progress of technology, mobile communication technology is gradually beginning to be applied to communication devices, such as mobile phones and the like. With the development and progress of technology, 5G mobile communication technology is gradually beginning to be applied to electronic devices. The 5G mobile communication technology has a communication frequency higher than that of the 4G mobile communication technology. The conventional rf system has poor reception performance for receiving a 5G low frequency signal (e.g., an N28 band signal) in a region where signals such as a cell edge, a deep building, or an elevator are poor.

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 receiving and transmitting circuit is connected with the radio frequency transceiver and is used for supporting amplification processing, filtering processing and transmitting of the low-frequency signals output by the radio frequency transceiver and supporting filtering processing of the received low-frequency signals;

the main set receiving circuit is respectively connected with the radio frequency transceiver and the transceiver circuit and is used for supporting to receive the low-frequency signals received and filtered by the transceiver circuit through the transceiver circuit and amplifying the low-frequency signals;

A main set MIMO receiving circuit connected with the radio frequency transceiver and used for supporting the main set MIMO receiving of the low frequency signals;

diversity reception circuitry, coupled to the radio frequency transceiver, for supporting diversity reception and diversity MIMO reception of the low frequency signals;

the receiving and transmitting circuit, the main set MIMO receiving circuit and the diversity receiving circuit are respectively configured to be connected with different antennas in an antenna group, the receiving and transmitting circuit and the main set MIMO receiving circuit are respectively connected with one antenna, and the diversity receiving circuit is connected with the other two antennas;

the transceiving circuit and target receiving circuit are configured to switchably connect at least two antennas of the antenna group, the target receiving circuit comprising at least one of the main set MIMO receiving circuit and the diversity receiving circuit.

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

The radio frequency system comprises a radio frequency transceiver, a transceiver circuit, a main set receiving circuit, a main set MIMO receiving circuit and a diversity receiving circuit, wherein the transceiver circuit is used for supporting amplification processing and filtering processing of low-frequency signals output by the radio frequency transceiver and transmitting the low-frequency signals and supporting filtering processing of the received low-frequency signals; the main set receiving circuit is respectively connected with the radio frequency transceiver and the transceiver circuit and is used for supporting to receive the low-frequency signals received and filtered by the transceiver circuit through the transceiver circuit and amplifying the low-frequency signals; a main set MIMO receiving circuit for supporting main set MIMO receiving of the low frequency signal; the diversity receiving circuit is used for supporting diversity receiving and diversity MIMO receiving of the low-frequency signals. The receiving and transmitting circuit, the main set MIMO receiving circuit and the diversity receiving circuit are respectively configured to be connected with different antennas in the antenna group, the receiving and transmitting circuit and the main set MIMO receiving circuit are respectively connected with one antenna, and the diversity receiving circuit is connected with the other two antennas; the transceiving circuit and the target receiving circuit are configured to switchably connect at least two antennas of the antenna group, the target receiving circuit comprising at least one of a main set MIMO receiving circuit and a diversity receiving circuit. When the radio frequency system is in the environment of good signal state, compared with the radio frequency system which can only support 2 x 2MIMO receiving of low frequency signals in the related art, the downlink communication rate can be doubled. When the radio frequency system is in weak signal environments such as cell edges, building depths and elevators, the diversity gain can be doubled compared with the radio frequency system which can only support 2 x 2MIMO receiving of low frequency signals in the related technology, the coverage distance is doubled, and the receiving performance is greatly improved. Therefore, compared with the radio frequency system supporting the low frequency signal 2 x 2MIMO reception in the related technology, the radio frequency system of the embodiment improves the downlink communication rate and the coverage distance by one time, and further can improve the receiving performance of the radio frequency system on the low frequency signal.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

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

FIG. 3 is a third schematic diagram of an RF system in one embodiment;

FIG. 4 is a schematic diagram of a RF system in one embodiment;

FIG. 5 is a schematic diagram of a radio frequency system in one embodiment;

FIG. 6 is a schematic diagram of a specific structure of a transceiver circuit according to an embodiment;

FIG. 7 is a schematic diagram of a specific configuration of a transceiver circuit and a main set receiver circuit in one embodiment;

FIG. 8 is a schematic diagram of a radio frequency system in one embodiment;

FIG. 9 is a second schematic diagram of a transceiver circuit according to an embodiment;

FIG. 10 is a second schematic diagram of a specific configuration of a transceiver circuit and a main set receiver circuit in one embodiment;

FIG. 11 is a schematic diagram of a RF system according to one embodiment;

FIG. 12 is a schematic diagram of an RF system in one embodiment;

FIG. 13 is a diagram of a ninth embodiment of a radio frequency system;

FIG. 14 is a schematic diagram of a RF system in one embodiment;

FIG. 15 is a schematic diagram of a specific configuration of a diversity receiving circuit according to one embodiment;

FIG. 16 is a second schematic diagram of a specific configuration of a diversity receiving circuit according to one embodiment;

FIG. 17 is a schematic diagram of the position of an antenna in one embodiment;

FIG. 18 is a schematic diagram of an RF system in one embodiment;

FIG. 19 is a schematic diagram of one embodiment of a radio frequency system;

FIG. 20 is a schematic diagram of a RF system in one embodiment;

FIG. 21 is a second schematic diagram of an embodiment of a radio frequency system;

FIG. 22 is a diagram of thirteen RF systems according to one embodiment;

FIG. 23 is a third exemplary diagram of an RF system according to one embodiment;

FIG. 24 is a schematic diagram of a radio frequency system in one embodiment;

FIG. 25 is a schematic diagram of a specific architecture of a radio frequency system in one embodiment;

Fig. 26 is a schematic structural 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 apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It will be understood that the terms "first," "second," and the like, as used herein, may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. 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 embodiments 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 devices connected to a wireless modem, and various types of User Equipment (UE) (e.g., a Mobile Station, MS), and so on. For convenience of description, the above-mentioned devices are collectively referred to as communication devices.

As shown in fig. 1, in one embodiment, a radio frequency system provided in an embodiment of the present application includes: a radio frequency transceiver 10, a transceiver circuit 20, a main set receiving circuit 30, a main set MIMO receiving circuit 40, and a diversity receiving circuit 50; an antenna group is also included. (fig. 1 illustrates a configuration in which the antenna group includes a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, and a fourth antenna ANT4, the transceiver circuit 20 is connected to the first antenna ANT1, the main set MIMO receiver circuit 40 is connected to the third antenna ANT3, and the diversity receiver circuit 50 is connected to the second antenna ANT2 and the fourth antenna ANT4, respectively, by way of illustration only, and not limitation).

The main set receiving circuit 30, the main set MIMO receiving circuit 40 and the diversity receiving circuit 50 are configured to support the 4×4MIMO receiving function of the low frequency signal. The MIMO (Multiple Input Multiple Output, multiple-transmit multiple-receive) technology refers to using multiple transmit antennas and receive antennas at a transmit port and a receive port, respectively, making full use of space resources, and implementing multiple-transmit multiple-receive through multiple antennas, so that the channel capacity of the system can be doubled without increasing spectrum resources and antenna transmit power.

In this embodiment, the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 are all capable of supporting transmission and reception of radio frequency signals of NR low frequencies and multiple frequency bands. Each antenna may be formed using any suitable type of antenna. For example, each 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 combinations of frequency bands. In the embodiment of the present application, the types of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 are not further limited.

In this embodiment, the low frequency signal may include a radio frequency signal in a low frequency band, and may also include radio frequency signals in a plurality of low frequency bands. The radio frequency signal may include at least one of a 4G LTE low frequency signal and a 5G NR low frequency signal. The frequency band division of the low frequency signal is shown in table 1.

Table 1 shows a frequency band division table of low frequency signals

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

Optionally, the low frequency signals include N5, N8, N20, N28, and N71 frequency band signals, and the radio frequency system may support a 4 x 4mimo receiving function of the N5, N8, N20, N28, and N71 frequency band signals.

In this embodiment, the radio frequency transceiver 10 may be configured with multiple ports to enable connections with the transceiver circuitry 20, the main set receiver circuitry 30, the main set MIMO receiver circuitry 40, and the diversity receiver circuitry 50. Optionally, the radio frequency transceiver 10 includes a transmitter for transmitting radio frequency signals to the transceiver circuit 20 and a receiver for receiving radio frequency signals output by the main set receiver circuit 30, the main set MIMO receiver circuit 40 and the diversity receiver circuit 50.

In this embodiment, the transceiver circuit 20 is respectively connected to the rf transceiver 10, and is configured to support power amplification and filtering of the low-frequency signal output by the rf transceiver 10, and transmit the low-frequency signal; the main set receiving circuit 30 is respectively connected with the radio frequency transceiver 10 and the transceiver circuit 20, and is used for supporting to receive the low-frequency signals received and filtered by the transceiver circuit 20 through the transceiver circuit 20 and amplifying the low-frequency signals; a main set MIMO receiving circuit 40, respectively connected to the radio frequency transceivers 10, for supporting main set MIMO reception of low frequency signals; the diversity receiving circuit 50 is connected to the radio frequency transceiver 10, and supports diversity reception and diversity MIMO reception of the low frequency signals.

The transceiver circuit 20, the main set MIMO receiving circuit 40 and the diversity receiving circuit 50 are respectively configured to connect different antennas in the antenna group, and the transceiver circuit 20 and the main set MIMO receiving circuit 40 are respectively connected with one antenna, and the diversity receiving circuit 50 is connected with the other two antennas; the transceiver circuit 20 and the target receiving circuit are configured to switchably connect at least two antennas of the antenna group, the target receiving circuit comprising at least one of a main set MIMO receiving circuit 40 and a diversity receiving circuit 50.

The transceiver circuit 20 and the main set MIMO receiving circuit 40 are respectively connected to one antenna, the diversity receiving circuit 50 is connected to two other antennas, that is, when each circuit is simultaneously connected to the antennas of the antenna group and the antenna switching is completed, the transceiver circuit 20 is connected to one antenna, the main set MIMO receiving circuit 40 is connected to the other antenna, and the diversity receiving circuit 50 is connected to the remaining two antennas.

Wherein the target receiving circuit comprises at least one of a main set MIMO receiving circuit 40 and a diversity receiving circuit 50.

When the target receiving circuit is the main set MIMO receiving circuit 40, the transceiver circuit 20 and the main set MIMO receiving circuit 40 are configured to switchably connect two antennas in the antenna group, and the diversity receiving circuit 50 is fixedly connected with the other two antennas, so that the two antennas switchably connected with the transceiver circuit 20 and the main set MIMO receiving circuit 40 can realize both the transmitting and main set receiving functions and the main set MIMO receiving functions.

When the target receiving circuit is the diversity receiving circuit 50, the transceiver circuit 20 and the diversity receiving circuit 50 are configured to switchably connect two antennas or three antennas in the antenna group, and correspond to: only one receiving path of the diversity receiving circuit 50 is switchably connected with the transceiver circuit 20 to two antennas in the antenna group, and two receiving paths of the diversity receiving circuit 50 are switchably connected with the transceiver circuit 20 to three antennas in the antenna group. So that two antennas switchably connected with the transceiver circuit 20 and the diversity receiver circuit 50 can realize not only the transmitting and main set receiving functions but also the diversity receiving or diversity MIMO receiving functions; the three antennas switchably connected to the transceiver circuit 20 and the diversity receiver circuit 50 can realize both the transmitting and main set receiving functions and the diversity receiving and diversity MIMO receiving functions.

When the target receiving circuit includes the main-set MIMO receiving circuit 40 and the diversity receiving circuit 50, the transceiving circuit 20, the main-set MIMO receiving circuit 40, and the diversity receiving circuit 50 are configured to switchably connect three antennas or four antennas in the antenna group, corresponding to: only one receiving path of the diversity receiving circuit 50, the transmitting and receiving circuit 20 and the main set MIMO receiving circuit 40 are switchably connected to three antennas in the antenna group, and two receiving paths of the diversity receiving circuit 50, the transmitting and receiving circuit 20 and the main set MIMO receiving circuit 40 are switchably connected to four antennas in the antenna group. Thereby, three antennas switchably connected with one of the receiving paths of the diversity receiving circuit 50, the receiving and transmitting circuit 20 and the main set MIMO receiving circuit 40 can realize the transmitting and main set receiving functions, the main set MIMO receiving functions and the diversity receiving or diversity MIMO receiving functions; the four antennas switchably connected to the two paths of the diversity receiving circuit 50, the transceiver circuit 20 and the main set MIMO receiving circuit 40 can realize not only the transmitting and main set receiving functions, but also the main set MIMO receiving functions, and also the diversity receiving and diversity MIMO receiving functions.

Wherein the transceiver circuit 20 and the main set receiving circuit 30 are configured to be connected to the same antenna for transmission of low frequency signals and main set reception, specifically, the main set receiving circuit 30 is connected to the transceiver circuit 20 to connect an antenna of the antenna group through the transceiver circuit 20. The transceiver circuit 20 is configured to amplify and filter the low-frequency signal, and transmit the low-frequency signal, and the main set receiver circuit 30 is configured to amplify and output the low-frequency signal, which is received by the antenna and is filtered by the transceiver circuit 20, to the radio-frequency transceiver 10.

Each of the main set receiving circuit 30, the main set MIMO receiving circuit 40 and the diversity receiving circuit 50 can support the receiving process of the low frequency signal, so as to jointly implement the 4×4MIMO receiving function of the low frequency signal. When the radio frequency system is in the environment of good signal state, compared with the radio frequency system which can only support 2 x 2MIMO receiving of low frequency signals in the related art, the downlink communication rate can be doubled. When the radio frequency system is positioned in weak signal environments such as cell edges, building depths and elevators, compared with the radio frequency system which can only support 2 x 2MIMO receiving of low frequency signals in the related technology, the diversity gain can be doubled, the coverage distance is doubled, and the receiving performance is greatly improved. Therefore, compared with the radio frequency system supporting the low frequency signal 2 x 2MIMO reception in the related technology, the radio frequency system of the embodiment improves the downlink communication rate and the coverage distance by one time, and further can improve the receiving performance of the radio frequency system on the low frequency signal.

The main set receiving circuit 30, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 may include a low noise amplifier, a filter, and the like, respectively, and may be used to support amplification processing of received low frequency signals (e.g., a 4G LTE signal and a 5G NR signal including at least one low frequency band). The transceiver circuit 20 may be used to support amplification processing and filtering processing for low frequency signals, where specific devices in the amplification processing may include a power amplifier, etc., specific devices in the filtering processing may include a duplexer or a filter, and the filtering processing may filter stray waves other than the low frequency signals.

The radio frequency system provided in this embodiment includes a radio frequency transceiver 10, a transceiver circuit 20, a main set receiving circuit 30, a main set MIMO receiving circuit 40, and a diversity receiving circuit 50, where the transceiver circuit 20 is configured to support amplification processing and filtering processing of a low frequency signal output by the radio frequency transceiver, and transmit the low frequency signal, and support filtering processing of a received low frequency signal; the main set receiving circuit 30 is respectively connected with the radio frequency transceiver 10 and the transceiver circuit 20, and is used for receiving the low-frequency signal received and filtered by the transceiver circuit 20 through the transceiver circuit 20 and amplifying the low-frequency signal; a main set MIMO receiving circuit 40 for supporting main set MIMO reception of low frequency signals; the diversity receiving circuit 50 is used to support diversity reception and diversity MIMO reception of low frequency signals. Wherein the transceiver circuit 20, the main set MIMO receiving circuit 40 and the diversity receiving circuit 50 are respectively configured to connect different antennas in the antenna group, and the transceiver circuit 20 and the main set MIMO receiving circuit 40 are respectively connected to one antenna, and the diversity receiving circuit 50 is connected to the other two antennas; the transceiving circuit and the target receiving circuit are configured to switchably connect at least two antennas of the antenna group, the target receiving circuit comprising at least one of a main set MIMO receiving circuit and a diversity receiving circuit. The radio frequency system can support the transmission of low-frequency signals and 4 x 4MIMO functions, and can doubly improve the throughput of the low-frequency signals. When the radio frequency system is in the environment of good signal state, compared with the radio frequency system which can only support 2 x 2MIMO receiving of low frequency signals in the related art, the downlink communication rate can be doubled. When the radio frequency system is positioned in weak signal environments such as cell edges, building depths and elevators, compared with the radio frequency system which can only support 2 x 2MIMO receiving of low frequency signals in the related technology, the diversity gain can be doubled, the coverage distance is doubled, and the receiving performance is greatly improved. Therefore, compared with the radio frequency system supporting the low frequency signal 2 x 2MIMO reception in the related technology, the radio frequency system of the embodiment improves the downlink communication rate and the coverage distance by one time, and further can improve the receiving performance of the radio frequency system on the low frequency signal.

In one embodiment, as shown in fig. 2, the transceiver circuit 20 includes:

the input end of the transmitting and amplifying module 210 is connected with the radio frequency transceiver 10 and is used for supporting power amplification of the low-frequency signal output by the radio frequency transceiver 10; the first filtering module 200, two first ends of the first filtering module 200 are respectively connected to the output end of the transmitting and amplifying module 210 and the main set receiving circuit 30, and the second end of the first filtering module 200 is switchably connected to an antenna (the antenna is shown as a first antenna ANT1 in the figure) of the antenna group, so as to perform filtering processing on the low-frequency signal after power amplification of the transmitting and amplifying module 210 and output the low-frequency signal to the antenna, and perform filtering processing on the low-frequency signal received by the antenna and output the low-frequency signal to the main set receiving circuit 30.

The transmitting and amplifying module 210 is configured to power amplify a low-frequency signal output by the radio-frequency transceiver 10, the first filtering module 200 is configured to filter a received signal to filter a signal other than the low-frequency signal, and only output the low-frequency signal, and also is configured to isolate the transmitting and amplifying module 210 from the signal of the main set receiving circuit 30, for example, to separate a receiving and transmitting path of the low-frequency signal according to a signal direction of the low-frequency signal so as to achieve an isolation effect.

Alternatively, the transmission amplifying module 210 and the first filtering module 200 may form an integrated circuit or may be provided in two modules, and alternatively, when the transmission amplifying module 210 and the first filtering module 200 form an integrated circuit, the transceiver circuit 20 may be understood as a low frequency power amplifier module (LB L-PA Mid, low Band Power Amplifier Modules including Duplexers) of a built-in filtering module. Further alternatively, when the transmission amplifying module 210 and the first filtering module 200 form an integrated circuit, as shown IN fig. 3, the transceiving circuit 20 is configured with an input port PA IN, an output port RX, and a first antenna port LB ANT1; wherein: the input end of the transmitting and amplifying module 210 is connected to the radio frequency transceiver through an input port PA IN, and the first filtering module 200 is connected to the main set receiving circuit 30 through an output port RX and to the antenna through a first antenna port LB ANT 1.

Alternatively, the first filtering module 200 may be a duplexer or a filter, and when the low-frequency signal is a radio-frequency signal with a single low-frequency band, for example, an N28-band signal, the first filtering module may perform filtering processing on a stray wave outside the N28-band, and only output the N28-band signal to the first antenna ANT1 or the main set receiving circuit 30; when the low frequency signal is a radio frequency signal with multiple low frequency bands, multiple first filtering modules or multiple first filtering modules including multiple diplexers or filters may be provided to respectively filter each low frequency signal and output multiple low frequency signals to the antenna or the main set receiving circuit 30. When the first filtering module 200 includes a duplexer, two first ends of the duplexer are respectively connected with the output end of the transmitting and amplifying module 210 and the main set receiving circuit 30, and a second end of the duplexer is connected with an antenna; when the first filtering module 200 includes a filter, the first filtering module 200 may specifically include two filters and a switching device, where first ends of the two filters are respectively connected to two first ends of the switching device, second ends of the two filters are respectively connected to an output end of the transmitting amplifying module 210 and the main set receiving circuit 30 in a one-to-one correspondence manner, and a second end of the switching device is connected to an antenna.

In one embodiment, as shown in fig. 4 (fig. 4 illustrates two first filtering modules 200 as an example), the low-frequency signal includes radio-frequency signals in a plurality of low-frequency bands; the number of the first filtering modules 200 is a plurality; the transceiver circuit 20 further includes: a first gating module 220, a second gating module 230.

The two first ends of each first filtering module 200 are respectively connected to a second end of the first gating module 220 in a one-to-one correspondence manner, the second end of the first filtering module 200 is connected to the second end of the second gating module 230, and the frequency bands of the low-frequency signals output by each first filtering module 200 are different. Thus, the transceiver circuit 20 can support amplification processing and filtering processing of low-frequency signals of a plurality of different frequency bands. For example, each first filtering module 200 includes a diplexer, where the low-frequency signals are signals in five different frequency bands of N5, N8, N20, N28, and N71, and five diplexers may be correspondingly disposed to implement filtering processing on the five low-frequency signals. It should be noted that, when the correlation processing of the low frequency signals of multiple different frequency bands needs to be supported, one first filtering module 200 may also be provided, for example, the first filtering module 200 may include multiple diplexers.

The first end of the first gating module 220 is connected to the transmitting amplifying module 210, the second end of the first gating module 220 is connected to the first filtering module 200, the first end of the second gating module 230 is connected to the first filtering module 200, and the second end of the second gating module 230 is connected to the antenna for selectively conducting radio frequency channels between the transmitting amplifying module 210 and the antenna and between the main set receiving circuit 30 and the antenna, so that the first gating module 220 and the second gating module 230 can be aimed at transmitting channels and receiving channels of a plurality of low-frequency signals, and insertion loss of the transceiver circuit 20 can be reduced through the first gating module 220 and the second gating module 230, and output power of the transceiver circuit 20 can be further improved. Specifically, the first gating module 220 and the second gating module 230 are respectively multichannel selection switches.

Optionally, as shown in fig. 4, the transceiver circuit 20 further includes:

the coupling module 240 is respectively connected to the second gating module 203 and the antenna, and is used for coupling the low-frequency signal in the radio frequency path between the second gating module 203 and the antenna.

Specifically, the coupling module 240 is configured with a coupling output terminal, and the coupling module 240 is connected to the second gating module 203 and the first antenna ANT1, respectively, and couples the low frequency signal in the radio frequency path between the second gating module 203 and the antenna to output a coupling signal. The coupling signal comprises a forward coupling signal and a reverse coupling signal, and the forward power information of the low-frequency band signal can be detected based on the forward coupling signal output by the coupling end; based on the reverse coupling signal output by the coupling end, the reverse power information of the low-frequency band signal can be correspondingly detected, and the detection mode is defined as a reverse power detection mode.

Optionally, as shown in fig. 4, the transceiver circuit 20 further includes a 2G low frequency amplification module 250 and a 2G high frequency amplification module 260. The 2G low frequency signal and the 2G high frequency signal can be amplified by the 2G low frequency amplification module 250 and the 2G high frequency amplification module 260, respectively. The input ends of the 2G low-frequency amplification module 250 and the 2G high-frequency amplification module 260 are both connected with the

radio frequency transceiver

10,2G, the output end of the low-frequency amplification module 250 is connected with the output end of the high-frequency amplification module 260 of the

second gating module

230,2G, and other antennas can be connected.

In one embodiment, at least one of the plurality of first filtering modules 200 is a built-in first filtering module, the transmitting and amplifying module 210, the first gating module 220, the second gating module 230 and the built-in first filtering module form an integrated circuit, and the transceiver circuit 20 is configured with an input port, an output port and a first antenna port; wherein: the input port is connected to the input end of the transmitting and amplifying module 210 and the rf transceiver 10, the output port is connected to a first end of the built-in first filtering module and the main set receiving circuit 30, and the first antenna port is connected to the first end of the second gating module 230 and the antenna.

Through integration, the main board area occupied by the radio frequency system can be reduced, the integration level of the device is improved, the miniaturization of the device is facilitated, and the cost is reduced; meanwhile, the insertion loss in the transmitting process and the receiving process can be reduced, the output power of the receiving and transmitting circuit 20 and the main set receiving circuit 30 to the low-frequency signals is improved, the sensitivity performance of the low-frequency signals is improved, and the communication performance of a radio frequency system is further improved.

Wherein at least one of the plurality of first filtering modules 200 is a built-in first filtering module, comprising: one of the plurality of first filter modules 200 is an internal first filter module, and the remaining other first filter modules 200 are external first filter modules; a plurality of the first filtering modules 200 are built-in first filtering modules, and the rest of the first filtering modules 200 are external first filtering modules; the plurality of first filter modules 200 are built-in first filter modules. The built-in first filtering module is to form an integrated circuit for the first filtering module 200, the transmitting amplifying module 210, the first gating module 220, the second gating module 230 and other modules, and the external first filtering module is to set the first filtering module 200 outside the integrated circuit and parallel to the integrated circuit.

Based on the embodiment of fig. 4, as shown in fig. 5, the plurality of first filtering modules 200 are all built-in first filtering modules (only two first filtering modules 200 are shown in fig. 5):

the plurality of first filter modules 200 are built-IN first filter modules, the transmission amplifying module 210, the first gating module 220, the second gating module 230 and all the first filter modules 200 form an integrated circuit 201, and the integrated circuit 201 is configured with an input port PA IN, an output port RX and a first antenna port LB ANT1; wherein: the input port PA IN is connected to the input end of the transmit amplifier module 210 and the rf transceiver 10, and the output port RX is connected to a first end of the built-IN first filter module and the main set receiving circuit 30, respectively, and the first antenna port LB ANT1 is connected to a first end of the second gating module 230 and an antenna (illustrated by a first antenna ANT1 IN the figure).

The transceiver circuit 20 is further configured with a coupling output port CPLOUT, the coupling output port CPLOUT is connected to the coupling end of the coupling module 240, and the transceiver circuit 20 is further configured with an input port GSM LB IN, an input port GSM HB IN and a high frequency output port GSM HB OUT, the input port GSM LB IN is connected to the input end of the 2G low frequency amplification module 250, and the input port GSM HB IN and the high frequency output port GSM HB OUT are respectively connected to the input end and the output end of the 2G high frequency amplification module 260.

In one embodiment, as shown in fig. 6 (fig. 6 shows 4 built-in first filtering modules), the transmitting amplifying module 210 includes a power amplifier LB PA1, the first gating module 220 includes a multi-channel selection switch SP8T1, the second gating module 230 includes a multi-channel selection switch SP8T2, and the first filtering module 200 is a diplexer DU. The input end of the power amplifier LB PA1 is connected with the input port LNA IN; the first end of the multichannel selective switch SP8T1 is connected with the output end of the power amplifier LB PA1, a plurality of second ends of the multichannel selective switch SP8T1 are respectively connected with the first ends of a plurality of diplexers DU in a one-to-one correspondence mode, the first ends of the diplexers DU are connected with the output port RX, the second ends of the diplexers DU are connected with the second end of the multichannel selective switch SP8T2, and the first ends of the multichannel selective switch SP8T2 are connected with the coupler Co.

Specifically, when the frequency band of the low-frequency signal is a preset frequency band, the power amplifier LB PA1 and a duplexer can support the related processing of the frequency band signal so as to correspondingly output the low-frequency signal without clutter; when the frequency band of the low-frequency signal is a plurality of preset frequency bands, the second ends of the multichannel selective switch SP8T1 are respectively connected with the first ends of the first filtering modules in a one-to-one correspondence mode, so that the power amplifier LB PA1 and the diplexer can also support the related processing of the low-frequency signals of a plurality of different frequency bands so as to correspondingly output the low-frequency signals of all the frequency bands without clutter. It will be appreciated that the power amplifier LB PA1, the multi-channel selector switch SP8T1 and the plurality of diplexers form a filtering path among the plurality of transmission paths, and the plurality of filtering paths are independent from each other and do not overlap with each other. It should be noted that, when the transmission amplifying module 210 only needs to implement the transmission of the low-frequency signal in one frequency band, the number of the second ends of the multi-channel selector switch SP8T1 may be only one, and the number of the diplexers is correspondingly one.

Further alternatively, as shown in fig. 6, the 2G low frequency transmit amplification module 250 includes a power amplifier 2G LB PA and a filter F1; the 2G high frequency transmit amplification module 260 includes a power amplifier 2G HB PA and a filter F2. The input end of the power amplifier 2G LB PA is connected to the input port GSM LB IN, the output end of the power amplifier 2G LB PA is connected to the first end of the second gating module 230 through the filter F1, the input end of the power amplifier 2G HB PA is connected to the input port GSM HB IN, and the output end of the power amplifier 2G HB PA is connected to the high frequency output port GSM HB OUT through the filter F2. The power amplifier 2G LB PA and the power amplifier 2G HB PA are used for amplifying the 2G low frequency signal and the 2G high frequency signal, respectively, and the filter F1 and the filter F2 are used for filtering the 2G low frequency signal and the 2G high frequency signal, respectively.

Alternatively, on the basis of the embodiment of fig. 6, as shown in fig. 7, the main set receiving circuit 30 includes: a low noise amplifier LNA1 and a gating unit, wherein the gating unit may be a multi-channel selection switch SP4T1.

A low noise amplifier LNA1, the output end of the low noise amplifier LNA1 is connected with the radio frequency transceiver 10; the first end of the multichannel selector switch SP4T1 is connected with the input end of the low-noise amplifier LNA1, the second end of the multichannel selector switch SP4T1 is connected with the first end of the first filter module through the output port RX, and the multichannel selector switch SP4T1 is connected with the first antenna port LB ANT1 through the first filter module to receive the low-frequency signal input by the first antenna port LB ANT 1. The multichannel selector switch SP4T1 is used for selectively conducting the radio frequency channel between the low-noise amplifier LNA1 and the first antenna port LB ANT1, so that the low-noise amplification processing is carried out on the 5G radio frequency signals with different frequency bands, the number of the low-noise amplifiers LNA1 is saved, and the area occupied by the device on a main board is reduced. When low-noise amplification processing is required for low-frequency signals in a plurality of frequency bands, a plurality of low-noise amplifiers LNA1 (for example, two low-noise amplifiers LNA 1) may be provided.

It should be noted that, the main set receiving circuit 30 may also be used to connect other antennas to support the reception of the intermediate frequency signal and the high frequency signal, and as shown in fig. 7, the main set receiving circuit 30 may further include a multi-channel selection switch nPnT, a plurality of low noise amplifiers LNA2, and a multi-channel selection switch SP4T2, so as to implement the reception of the intermediate frequency signal and the high frequency signal.

For convenience of explanation, the signal transceiving process of the transceiving circuit 20 and the main set receiving circuit 30 in this embodiment will be described by taking the low frequency signal as the N28 band signal as an example:

the transmitting process of the N28 low-frequency signal comprises the following steps: the radio frequency transceiver 10 outputs an N28 transmit signal to the integrated circuit 201 through the input port PA IN, amplifies the signal through the power amplifier LB PA1, performs filtering processing through the multi-channel selection switch SP8T1 and the diplexer, and outputs the signal to the first antenna port LB ANT1 through the multi-channel selection switch SP8T2 and the coupler Co, and finally reaches the antenna of the antenna group.

Main set receiving process of N28 low frequency signals: the antenna receives an N28 low-frequency signal from space, the N28 low-frequency signal enters the integrated circuit 201 through the first antenna port LB ANT1, enters the duplexer through the coupler Co and the multi-channel selection switch SP8T2 to be subjected to filtering processing, and is output to the main set receiving circuit 30 through the output port RX, and the low-noise amplifier LNA1 of the main set receiving module amplifies the N28 low-frequency signal and outputs the amplified signal to the radio-frequency transceiver 10.

IN one embodiment, at least one of the first filter modules 200 is an external first filter module, and the transmit amplifier module 210, the first strobe module 220, and the second strobe module 230 form an integrated circuit configured with an input port PA IN, an auxiliary transmit port, an auxiliary receive port, and a first antenna port LB ANT1; wherein:

the input port PA IN is respectively connected to the input end of the transmit amplifier module 210 and the radio frequency transceiver, two first ends of each external first filter module 200 are respectively connected to the auxiliary transmit port and the main set receive circuit IN a one-to-one correspondence manner, a second end of each external first filter module 200 is connected to the auxiliary receive port to be connected to a second end of the second gate module 230 through the auxiliary receive port, and the first antenna port LB ANT1 is respectively connected to the first end of the second gate module 230 and the antenna.

By externally arranging at least one first filtering module outside the integrated circuit 202, the low-frequency signals received and transmitted by the transceiver circuit 20 and the main set receiving circuit 30 can be filtered, and meanwhile, the isolation effect of the external first filtering module on the low-frequency signals is improved.

Wherein at least one of the plurality of first filtering modules 200 is an external first filtering module, including: one of the plurality of first filter modules 200 is an external first filter module, and the remaining other first filter modules 200 are internal first filter modules; a plurality of the first filtering modules 200 are external first filtering modules, and the rest of the first filtering modules 200 are internal first filtering modules; the plurality of first filtering modules 200 are all external first filtering modules. The external first filtering module and the internal first filtering module may refer to the explanation of the above embodiments, and are not described herein again.

Based on the embodiment of fig. 4, as shown in fig. 8, one of the plurality of first filter modules 200 is an external first filter module 200A (only one internal first filter module 200B is shown in fig. 8, and the internal first filter module 200B is connected to the main set receiving circuit 30 through the output port RX of the integrated circuit 202):

the transmit amplification module 210, the first gating module 220, and the second gating module 230 form an integrated circuit 202, the integrated circuit 202 being configured with an input port PA IN, an auxiliary transmit port LB TXOU, an auxiliary transmit receive port lb_trx, and a first antenna port LB ANT1; the input port PA IN is respectively connected to the input end of the transmit amplifier module 210 and the radio frequency transceiver 10, two first ends of the external first filter module 200A are respectively connected to the auxiliary transmit port LB TXOU and the main set receiving circuit 30 IN a one-to-one correspondence manner, a second end of the external first filter module 200A is connected to the auxiliary transmit receive port lb_trx to be connected to a second end of the second gate module 230 through the auxiliary transmit receive port lb_trx, and the first antenna port LB ANT1 is respectively connected to the first end of the second gate module 230 and the antenna.

The radio frequency path between the transmit amplification module 210 and the first antenna port LB ANT1 specifically includes: a transmission amplifying module 210, an external first filtering module 200A, a transmission path between the first antenna ports LB ANT1, and a transmission path between the transmission amplifying module 210, an internal first filtering module 200B, and the first antenna ports LB ANT1; the radio frequency path between the main set receiving circuit 30 and the first antenna port LB ANT1 specifically includes: the main set receiving circuit 30, the external first filter module 200A, and the receiving path between the first antenna port LB ANT1, and the receiving path between the main set receiving circuit 30, the internal first filter module 200B, and the first antenna port LB ANT 1.

The integrated circuit 202 is further configured with a coupling output port CPLOUT, the coupling output port CPLOUT is connected to the coupling end of the coupling module 240, the transceiver circuit 20 is further configured with an input port GSM LB IN, an input port GSM HB IN and a high frequency output port GSM HB OUT, the input port GSM LB IN is connected to the input end of the 2G low frequency amplification module 250, and the input port GSM HB IN and the high frequency output port GSM HB OUT are respectively connected to the input end and the output end of the 2G high frequency amplification module 260.

In one embodiment, as shown in fig. 9, the transmit amplifying module 210 includes a power amplifier LB PA1, the first gating module 220 includes a multi-channel selection switch SP8T1, the second gating module 230 includes a multi-channel selection switch SP8T2, the external first filtering module 200A is a duplexer DU1, the internal first filtering module 200B is a duplexer DU2, and the coupling module 240 is a coupler Co.

Alternatively, on the basis of the embodiment of fig. 9, as shown in fig. 10, the main set receiving circuit 30 includes:

a low noise amplifier LNA1, the output end of the low noise amplifier LNA1 is connected with the radio frequency transceiver 10; the first end of the multichannel selector switch SP4T1 is connected to the input end of the low noise amplifier LNA1, the second end of the multichannel selector switch SP4T1 is connected to the first end of the first filter module 200, and the multichannel selector switch SP4T1 is connected to the first antenna port LB ANT1 through the first filter module 200 to receive the low frequency signal input by the first antenna port LB ANT 1. The descriptions of the low noise amplifier LNA1 and the multi-channel selector switch SP4T1 are referred to the detailed descriptions of the above embodiments, and are not repeated here.

It should be noted that, the main set receiving circuit 30 may also be used to connect other antennas to support the reception of the intermediate frequency signal and the high frequency signal, and as shown in fig. 10, the main set receiving circuit 30 may further include a plurality of low noise amplifiers LNA2 and a multi-channel selection switch SP4T2, so as to implement the reception of the intermediate frequency signal and the high frequency signal.

the transmitting process of the N28 low-frequency signal comprises the following steps: the radio frequency transceiver 10 outputs an N28 transmission signal to the transmission module 201 through the input port PA IN, amplifies the signal through the power amplifier LB PA1, outputs the signal to the auxiliary input port PA IN through the multi-channel selection switch SP8T1 to reach the first filter module 200, and outputs the signal to the first antenna port LB ANT1 through the auxiliary transceiver port lb_trx, the multi-channel selection switch SP8T2 and the coupler Co after the first filter module 200 performs the filtering processing, and finally reaches the antenna.

Main set receiving process of N28 low frequency signals: the first antenna ANT1 or the second antenna ANT2 receives an N28 low-frequency signal from space, the N28 low-frequency signal enters the transmitting module 201 through the first antenna port LB ANT1, enters the first filtering module 200 through the coupler Co, the multi-channel selection switch SP8T2 and the auxiliary transceiving port lb_trx to be filtered, enters the low-noise amplifier LNA1 of the main set receiving circuit 30 through the auxiliary output port RX to be amplified, and is output to the radio frequency transceiver 10.

As shown in fig. 11 (fig. 11 illustrates a configuration in which the transceiver circuit 20 is connected to the first antenna ANT1 and the diversity receiver circuit 50 is connected to the second antenna ANT2, which is merely illustrative and not limiting), in one embodiment, the main set MIMO receiver circuit 40 includes:

the second filtering module 401 is respectively connected to the radio frequency transceiver 10 and an antenna of the antenna group, and is used for filtering the low-frequency signal received by the antenna; the input end of the first amplification module 402 is connected with the second filtering module 401, and the output end of the first amplification module 402 is connected with the radio frequency transceiver 10 and is used for amplifying the low-frequency signal after filtering.

The second filtering module 401 may be a filter, the first amplifying module 402 may be a low noise amplifier, and the second filtering module 401 and the first amplifying module 402 may implement filtering processing and amplifying processing on the low frequency signal received by the third antenna ANT3, and output the low frequency signal after the filtering processing and amplifying processing to the radio frequency transceiver 10, so as to implement main set MIMO receiving of the main set MIMO receiving circuit 40.

For convenience of explanation, the signal receiving process of the main set MIMO receiving circuit 40 in this embodiment will be described by taking the low frequency signal as the N28 band signal as an example:

Main set MIMO receiving process of N28 low frequency signals: the antenna receives the N28 low-frequency signal from the space, the N28 low-frequency signal is filtered by the second filtering module 401, amplified by the first amplifying module 402, and then enters the radio-frequency transceiver 10.

Optionally, the antenna efficiency of the antenna connected to the main set MIMO receiving circuit 40 is lower than the antenna efficiency of the antenna connected to the transceiver antenna 20, and as shown in fig. 12, the main set MIMO receiving circuit 40 further includes:

and the output end of the second amplifying module 403 is connected with the output end of the first amplifying module 402, and the input end of the second amplifying module 403 is connected with the second filtering module, so as to amplify the low-frequency signal after being filtered by the second filtering module.

By providing the second amplifying module 403 at a position close to the antenna side in the main set MIMO receiving circuit 40, the receiving performance of the main set MIMO receiving circuit 40 can be improved, and the problems of low efficiency and large insertion loss of primary noise amplification due to environmental problems can be avoided. Optionally, the second amplifying module 403 is a low noise amplifier, an input end of the low noise amplifier is connected to the second filtering module 401, and an output end of the low noise amplifier is connected to an input end of the first amplifying module 402. It should be noted that the second amplifying module 403 may be disposed between the first amplifying module 402 and the second filtering module, or may be disposed between the radio frequency transceiver 10 and the second filtering module.

As shown in fig. 13 (fig. 13 illustrates an example in which the diversity receiving circuit 50 is connected to the second antenna ANT2, and only the radio frequency transceiver 10, the diversity receiving circuit 50, the second antenna ANT2, and the fourth antenna ANT4 are shown), in one embodiment, the diversity receiving circuit 50 includes:

the third filtering module 501 is respectively connected to the rf transceiver 10 and an antenna of the antenna set, and is configured to perform filtering processing on the received low-frequency signal.

The input end of the third amplifying module 502 is connected with the third filtering module 501, and the output end of the third amplifying module 502 is connected with the radio frequency transceiver 10 for amplifying the low-frequency signal after the filtering process.

And a fourth filtering module 503, respectively connected to the rf transceiver 10 and another antenna of the antenna set, for filtering the received low-frequency signal.

The input end of the fourth amplifying module 504 is connected with the fourth filtering module 503, and the output end of the fourth amplifying module 504 is connected with the radio frequency transceiver 10 for amplifying the low-frequency signal after the filtering process.

Wherein, the third filtering module 501 and the fourth filtering module 503 may each be a filter, and the third amplifying module 502 and the fourth amplifying module 504 may each be a low noise amplifier. The third filtering module 501 and the third amplifying module 502 can implement filtering and amplifying on the low-frequency signal received by the antenna, and output the low-frequency signal after filtering and amplifying to the radio frequency transceiver 10, so as to implement diversity reception of the diversity receiving circuit 50; the fourth filtering module 503 and the fourth amplifying module 504 may perform filtering processing and amplifying processing on the low-frequency signal received by the antenna, and output the low-frequency signal after the filtering processing and amplifying processing to the radio frequency transceiver 10, so as to implement diversity MIMO receiving of the diversity receiving circuit 50.

Alternatively, the antenna efficiency of the antenna connected to the fourth filtering module 503 is lower than that of the antenna connected to the third filtering module 501, as shown in fig. 14 (fig. 14 illustrates that the diversity receiving circuit 50 is connected to the second antenna ANT2 and the fourth antenna ANT4, and only the radio frequency transceiver 10, the diversity receiving circuit 50, the second antenna ANT2 and the fourth antenna ANT4 are illustrated), and the diversity receiving circuit 50 further includes:

the input end of the fifth amplifying module 505 is connected to the output end of the fourth amplifying module 504, and the output end of the fifth amplifying module 505 is connected to the radio frequency transceiver 10, so as to perform a second-stage amplifying process on the low-frequency signal amplified by the fourth amplifying module 504.

By providing the fifth amplification block 505 at a position close to the fourth antenna ANT4 side in the diversity reception circuit 50, the reception performance of the diversity reception circuit 50 can be improved, and the problem of large insertion loss due to low efficiency caused by environmental problems can be avoided.

Optionally, the low frequency signal includes a plurality of low frequency band radio frequency signals, and the number of the third filtering module 501 and the number of the fourth filtering module 503 are all a plurality; the diversity reception circuit 50 is configured with a second antenna port LB ANT2 and a third antenna port LB ANT3, the second antenna port LB ANT2 being connected to one antenna of the antenna group (the second antenna ANT2 is exemplified in the figure), the third antenna port LB ANT3 being connected to the other antenna of the antenna group (the fourth antenna ANT4 is exemplified in the figure), and as shown in fig. 15, the diversity reception circuit 50 further includes:

The third gating module 506, a first end of the third gating module 506 is connected to the third amplifying module 502; a fourth gating module 507, wherein a first end of the fourth gating module 507 is connected with the fourth amplifying module 504; the fifth gating module 508, a second end of the fifth gating module 508 is connected to the second antenna port LB ANT2.

Wherein, each third filtering module 501 is respectively connected to a fifth gating module 506 and a fifth gating module 508, at least one of the fourth filtering modules 503 is connected between the fourth gating module 507 and the fifth gating module 508, and at least one of the fourth filtering modules 503 is connected between the third antenna port LB ANT3 and the antenna; the fifth gating module 506, the fourth gating module 507, and the fifth gating module 508 are configured to jointly select and conduct a radio frequency path between the third amplifying module 502 and the second antenna port LB ANT2, and between the fourth amplifying module 504 and the third antenna port LB ANT 3. So that the diversity receiving circuit 50 can support the amplification processing of the low frequency signals of a plurality of different frequency bands.

The diversity receiving circuit 50 is configured with the second antenna port LB ANT2 and the third antenna port LB ANT3, and the diversity receiving circuit 50 can be understood as LFEM (Low noise amplifier front end module, radio frequency low noise amplifier module). By integrating the diversity receiving circuit 50, the main board area occupied by the radio frequency system can be reduced, the integration level of the device is improved, the miniaturization of the device is facilitated, and the cost is reduced; meanwhile, the insertion loss of the diversity receiving circuit 50 can be reduced, the output power of the low-frequency signal is improved, the sensitivity performance of the low-frequency signal is improved, and the communication performance of the radio frequency system is further improved.

In the present embodiment, at least one of the plurality of fourth filter modules 503 is disposed outside the LFEM module, and the other

fourth filter modules

503, 501, 502, and 504 are integrated inside the LFEM module. In other embodiments, all the fourth filtering modules 503 may be integrated inside the LFEM module to improve the integration level.

Further alternatively, as shown in fig. 15, the diversity receiving circuit 50 is configured with a plurality of output ports LNA OUT, and the diversity receiving circuit 50 further includes:

the sixth gating module 509, two first ends of the sixth gating module 509 are respectively connected to the output ports LNA OUT of the diversity receiving circuit 50 in a one-to-one correspondence, and two second ends of the sixth gating module 509 are respectively connected to the third amplifying module 502 and the fourth amplifying module 504 in a one-to-one correspondence. The sixth gating module 509 can select the radio frequency path between the output port LNA OUT of the pass diversity receiving circuit 50 and the third amplification module 502 and the fourth amplification module 504.

Further alternatively, as shown in fig. 15, the fifth gating module 506, the fourth gating module 507, the fifth gating module 508, and the sixth gating module 509 are respectively corresponding to a multi-channel selection switch SP4T6, a multi-channel selection switch SP4T7, a multi-channel selection switch SP8T3, and a double pole double throw switch DPDT. The third filtering module 501 and the fourth filtering module 503 are respectively a filter F, F, and the third amplifying module 502 and the fourth amplifying module 504 are respectively a low noise amplifier LNA7 and a low noise amplifier LNA8.

For convenience of explanation, the signal receiving process of the diversity receiving circuit 50 in the present embodiment will be described by taking the low frequency signal as the N28 band signal as an example:

diversity reception process of N28 low frequency signal: the antenna receives the N28 low frequency signal from the space, the N28 low frequency signal is filtered by the filter F3, amplified by the low noise amplifier LNA7, and output to the radio frequency transceiver 10.

Diversity MIMO reception process of N28 low frequency signals: the antenna receives the N28 low frequency signal from the space, the N28 low frequency signal is filtered by the filter F6, amplified by the low noise amplifier LNA8, and output to the radio frequency transceiver 10.

Further alternatively, as shown in fig. 16, the diversity receiving circuit 50 is further configured with a middle-high frequency antenna port MHB ANT, and the diversity receiving circuit 50 is further configured to connect with other antennas to support reception of middle-frequency signals and high-frequency signals, and perform filtering amplification processing on the middle-high frequency radio frequency signals. Optionally, the diversity receiving circuit 50 further includes a seventh gating module 510, a sixth amplifying module 511, an eighth gating module 512, a fifth filtering module 513, and a ninth gating module 514. Specifically, the seventh gating module 510 may include a plurality of multi-channel selection switches SP4T, the sixth amplifying module 511 includes a plurality of low noise amplifiers LNA1, the eighth gating module 512 includes a plurality of multi-channel selection switches SP4T, the fifth filtering module 513 includes a plurality of filters, and the ninth gating module 514 includes a multi-channel selection switch SP8T4.

In some embodiments, the antenna group in the above embodiments includes a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, and a fourth antenna ANT4, where: the transceiver circuit 20 and the diversity receiver circuit 50 are configured to switchably connect the first antenna ANT1, the second antenna ANT2, the main set MIMO receiver circuit 40 is configured to connect the third antenna ANT3, and the diversity receiver circuit 50 is further configured to connect the fourth antenna ANT4 to support diversity MIMO reception of low frequency signals. Thus, the antenna switching function is supported between the first antenna ANT1 and the second antenna ANT2, and the transmission, the main set reception and the diversity reception of the low-frequency signals can be supported.

Optionally, the antenna efficiency of the first antenna ANT1 and the second antenna ANT2 is higher than the efficiency of the third antenna ANT3 and the fourth antenna ANT4, the target antenna is any one of the first antenna ANT1 and the second antenna ANT2, and uplink signals can be distributed on the first antenna ANT1 or the second antenna ANT2 with better antenna efficiency, so that the reliability of the uplink signals can be ensured to improve the communication performance of the radio frequency system. Alternatively, as shown in fig. 17, the first antenna ANT1 and the second antenna ANT2 are respectively disposed at the top frame 101 and the bottom frame 103 of the communication device, and the third antenna ANT3 and the fourth antenna ANT4 are disposed at the two

side frames

102, 104 of the communication device, and therefore, the efficiency of the first antenna ANT1 and the second antenna ANT2 is higher than that of the third antenna ANT3 and the fourth antenna ANT 4.

Optionally, the radio frequency transceiver 10 is configured to configure a target antenna received by the main set of the main set receiving circuit 30 according to the network information of the low frequency signals received by the main set receiving circuit 30 and the diversity receiving circuit 50, where the target antenna is one of the first antenna ANT1 and the second antenna ANT 2. The network information may include, among other things, raw and processed information associated with radio performance metrics of the received low frequency signals, such as signal strength, received power, reference signal received power (Reference Signal Receiving Power, RSRP), received signal strength (Received Signal Strength Indicator, RSSI), signal to noise ratio (Signal to Noise Ratio, SNR), rank of the MIMO channel matrix (Rank), carrier to interference plus noise ratio (Carrier to Interference plus Noise Ratio, RS-CINR), frame error rate, bit error rate, reference signal received quality (Reference signal reception quality, RSRQ), and the like. Further alternatively, the radio frequency transceiver 10 may store configuration information of each circuit connected to each antenna in advance. The configuration information may include identification information of the antenna, identification information of each circuit, control logic information of each switch on the radio frequency path between the transceiver circuit 20 and the diversity receiver circuit 50 and the first antenna ANT1 and the second antenna ANT2, respectively, and the like.

Taking the network information as the received signal strength as an example, the first antenna ANT1 is configured as a default target antenna for transmitting the low-frequency signal and receiving the main set, and if the difference between the second signal strength of the low-frequency signal received by the second antenna ANT2 and the first signal strength of the 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 second antenna ANT2 is configured as the target antenna.

Specifically, when the first antenna ANT1 is configured as a default target antenna for transmission of the low frequency signal and main set reception, the radio frequency transceiver 10 receives the low frequency signal received by the first antenna ANT1 and the second antenna ANT2 through the main set reception circuit 30, the diversity reception circuit 50, respectively, and controls switching of the antennas according to the first signal strength of the low frequency signal received by the first antenna ANT1 and the second signal strength of the low frequency signal received by the second antenna ANT 2. More specifically, the difference of the second received signal strength minus the first received signal strength is greater than or equal to a preset threshold value for a preset time, and the second antenna ANT2 is taken as the target antenna. After determining the target antenna, the radio frequency transceiver 10 may control the relevant logic switch of the radio frequency system to switch on the transmitting path between the second antenna ANT2 and the transceiver circuit 20, so as to switch on the receiving path between the main set receiving circuit and the second antenna ANT2, and switch on the receiving path between the first antenna ANT1 and the diversity receiving circuit 50, so that the second antenna ANT2 is used to implement the transmission and the main set receiving of the low frequency signal, so as to improve the 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 target antenna, and the current working state is maintained.

The preset threshold values are all larger than zero, and the size of the preset threshold values can be set according to requirements. By setting the judgment condition of the preset threshold value, frequent switching between antennas caused by that the signal receiving intensity of the antennas is possibly always in variation can be prevented, and the influence of the transmission efficiency of the antennas can be reduced.

In one embodiment, the transceiver circuit 20 and the diversity receiver circuit 50 are configured to switchably connect the first antenna ANT1 and the second antenna ANT2 through an external switching circuit, and as shown in fig. 18, the radio frequency system further includes:

the first switching circuit 60 is connected to the transceiver circuit 20, the diversity receiving circuit 50, the first antenna ANT1 and the second antenna ANT2, and is configured to switchably connect the transceiver circuit 20 and the diversity receiving circuit 50 to the first antenna ANT1 and the second antenna ANT2. The relevant descriptions of the transceiver circuit 20 and the diversity receiver circuit 50 are referred to the above embodiments, and are not repeated here.

By providing the first switching circuit 60, the transceiver circuit 20 and the diversity receiving circuit 50 can be selectively and switchably connected with the first antenna ANT1 and the second antenna ANT2, the target antenna is determined from the first antenna ANT1 and the second antenna ANT2, and the first switching circuit 60 is controlled to enable the target antenna to transmit and receive the main set, so that the uplink signal can be distributed on the first antenna ANT1 or the second antenna ANT2 with better antenna efficiency, and the reliability of the uplink signal can be ensured to improve the communication performance of the radio frequency system.

Alternatively, the first switching circuit 60 may be a double pole double throw switch DPDT3, where two first ends of the first switching circuit 60 are respectively connected with the transceiver circuit 20 and the diversity receiving circuit 50 in a one-to-one correspondence manner, and two second ends of the first switching circuit 60 are respectively connected with the first antenna ANT1 and the second antenna ANT2 in a one-to-one correspondence manner. Further alternatively, as shown in fig. 19, two first ends of the double pole double throw switch DPDT3 are respectively connected to the first antenna port LB ANT1 of the integrated circuit 201 and the second antenna port LB ANT2 of the diversity receiving circuit 50 in one-to-one correspondence, and the double pole double throw switch DPDT3 switchably connects the first antenna port LB ANT1 and the second antenna port LB ANT2 to the first antenna ANT1 and the second antenna ANT2. The double pole double throw switch DPDT3 thus enables the first antenna port LB ANT1 and the second antenna port LB ANT2 to be switchably connected to the first antenna ANT1 and the second antenna ANT2.

In one embodiment, the transceiver circuit 20 and the diversity receiver circuit 50 are configured to switchably connect the first antenna ANT1 and the second antenna ANT2 through a switching module inside the transceiver circuit 20. Based on the embodiment of fig. 2, as shown in fig. 20, the transceiver circuit 20 further includes:

the first switching module 270 is connected to the second end of the first filtering module 200, the first antenna ANT1, the second antenna ANT2, and the diversity receiving circuit 50, and is configured to switchably connect the first filtering module 200 and the diversity receiving circuit 50 to the first antenna ANT1 and the second antenna ANT2.

By arranging the first switching module 270, the first filtering module 200 and the diversity receiving circuit 50 can be selectively and switchably connected with the first antenna ANT1 and the second antenna ANT2, the target antenna is determined from the first antenna ANT1 and the second antenna ANT2, and the first switching module 270 is controlled to enable the target antenna to transmit and receive the main set, so that uplink signals can be distributed on the first antenna ANT1 or the second antenna ANT2 with better antenna efficiency, and the reliability of the uplink signals can be ensured to improve the communication performance of the radio frequency system.

The first switching module 270, the transmission amplifying module 210 may form an integrated circuit, or the first switching module 270, the transmission amplifying module 210, and the first filtering module 200 may form an integrated circuit. When forming the integrated circuit, the integrated circuit may be configured with two switch ports and one connection port, where the two first ends of the first switch module 270 are respectively connected to the two switch ports, so as to implement that the two second ends of the first switch module 270 are respectively connected to the first filter module 200 and the connection port, and the connection port is connected to the diversity receiving circuit 50.

As shown in fig. 21, the integrated circuit 201 is configured with a first switching port ANT101, a second switching port ANT102, and a connection port CAX, and the first switching module 270 may be a double pole double throw switch DPDT4. The input port PA IN is configured to be connected to the radio frequency transceiver 10, the first switching port ANT101 and the second switching port ANT102 are configured to be connected to the first antenna ANT1 and the second antenna ANT2 IN one-to-one correspondence, and the connection port CAX is connected to the diversity receiving circuit 50; the first switching module 270 is connected to the coupling module 240, the first switching port ANT101, the second switching port ANT102, and the connection port CAX, and is configured to switchably connect the coupling module 240 and the connection port CAX to the first switching port ANT101 and the second switching port ANT102.

In some embodiments, the antenna group in the above embodiments includes a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, and a fourth antenna ANT4, where: the transceiver circuit 20, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 are configured to switchably connect the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4.

Optionally, the radio frequency transceiver 10 is configured to be connected to a target antenna received by the main set of the main set receiving circuit 30 according to network information of the low frequency signals received by the main set receiving circuit 30, the main set MIMO receiving circuit 40 and the diversity receiving circuit 50, where the target antenna is one of the first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4. Specific configuration may be referred to the relevant description in the above embodiments, and will not be repeated here.

Optionally, the first antenna ANT1 is configured as a default target antenna for transmitting and receiving the low-frequency signal, and if the difference between the second signal strength of the low-frequency signal received by the second antenna ANT2 and the third signal strength of the low-frequency signal received by any one of the first antenna ANT1, the third antenna ANT3 and the fourth antenna ANT4 is greater than or equal to a preset threshold value in a preset time period, the second antenna ANT2 is configured as the target antenna. The description of the preset threshold is referred to the above embodiments, and is not repeated here.

In one embodiment, the transceiver circuit 20, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 are configured to switchably connect the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 through an external switching circuit, and as shown in fig. 22, the radio frequency system further includes:

the second switching circuit 70 is connected to the transceiver circuit 20, the main set MIMO receiving circuit 40, the diversity receiving circuit 50, the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, and is configured to switchably connect the transceiver circuit 20, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 to the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4.

By providing the second switching circuit 70, the transceiver circuit 20, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 may be selectively and switchably connected to the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, the target antenna may be determined from among the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, and the second switching circuit 70 may be controlled to enable the target antenna to transmit and receive the main set, so that the uplink signal may be distributed on the antenna with better antenna efficiency, and the reliability of the uplink signal may be ensured to improve the communication performance of the radio frequency system.

As shown in fig. 23, the second switching circuit 70 may be a four-pole four-throw switch 4P4T1, where four first ends of the second switching circuit 70 are respectively connected to two ends of the transceiver circuit 20, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 in a one-to-one correspondence manner, and four second ends of the first switching circuit 60 are respectively connected to the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 in a one-to-one correspondence manner.

In one embodiment, the transceiver circuit 20, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 are configured to switchably connect the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4 through switching circuits inside the transceiver circuit 20. Based on the embodiment of fig. 2, as shown in fig. 24, the transceiver circuit 20 further includes:

the second switching module 280 is connected to the second end of the first filtering module 200, the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, the fourth antenna ANT4, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50, and is configured to switchably connect the first filtering module 200, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 to the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4.

By providing the second switching module 280, the first filtering module 200, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 may be selectively and switchably connected to the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, the target antenna is determined from the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, and the fourth antenna ANT4, and the second switching module 280 is controlled to enable the target antenna to transmit and receive the main set, so that uplink signals may be distributed on an antenna with better antenna efficiency, and reliability of the uplink signals may be ensured to improve communication performance of the radio frequency system.

The second switching module 280, the transmission amplifying module 210 may form the integrated circuit 201, or the second switching module 280, the transmission amplifying module 210, and the first filtering module 200 may form the integrated circuit 201, and when the integrated circuit is formed, the integrated circuit is configured with four switching ports and three connection terminals.

As shown in fig. 25, the integrated circuit 201 is configured with a first switching port ANT101, a second switching port ANT102, a third switching port ANT103, a fourth switching port ANT104, a first connection port CAX1, a second connection port CAX2, and a third connection port CAX3, and the second switching module 280 is a four-pole four-throw switch 4P4T2. Wherein the first switching port ANT101, the second switching port ANT102, the third switching port ANT103, the fourth switching port ANT104, the first connection port CAX1, are configured to be connected to the first antenna ANT1, the second antenna ANT2, the third antenna ANT3, the fourth antenna ANT4, the main set MIMO receiving circuit in one-to-one correspondence, respectively, and the second connection port CAX2 and the third connection port CAX3 are configured to be connected to the diversity receiving circuit 50; the second switching module 280 is respectively connected to the coupling module 240, the first switching port ANT101, the second switching port ANT102, the third switching port ANT103, the fourth switching port ANT104, the first connection port CAX1, the second connection port CAX2 and the third connection port CAX3, and is configured to switchably connect the coupling module 240, the first connection port CAX1, the second connection port CAX2 and the third connection port CAX3 to the first switching port ANT101, the second switching port ANT102, the third switching port ANT103 and the fourth switching port ANT104.

The embodiment of the application also provides a communication device, and the communication device is provided with the radio frequency system in any embodiment.

By arranging the radio frequency system on the communication equipment, 4 x 4MIMO reception can be realized, and the throughput of low-frequency signals can be improved by times under the condition of not increasing frequency spectrum resources and antenna transmitting power; the downloading rate can be improved to improve the user experience, and meanwhile, when the communication equipment is positioned in weak signal environments such as cell edges, building depths, elevators and the like, the communication equipment is received through 4 x 4MIMO, so that the communication equipment has higher diversity gain and larger coverage distance; the device has high integration level, reduces the area of each device occupying the substrate in the radio frequency system, and can simplify the layout and wiring and save the cost.

As further illustrated in fig. 26, and as a communication device is illustrated as a mobile phone 11, in particular, as shown in fig. 26, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer readable storage media), a processor 22, a peripheral interface 23, a radio frequency system 24, and an input/output (I/O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. It will be appreciated by those skilled in the art that the handset 11 shown in fig. 26 is not limiting and may include more or fewer components than shown, or may be combined with certain components, or a different arrangement of components. The various components shown in fig. 23 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.

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 the memory 21 include an operating system 211, a communication module (or instruction set) 212, a Global Positioning System (GPS) module (or instruction set) 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 units, 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 or the like for controlling the various switches in the radio frequency system 24.

The I/O subsystem 26 couples input/output peripheral devices on the handset 11, such as keypads and other input control devices, to the peripheral interface 23. The I/O subsystem 26 optionally includes a touch screen, keys, tone generator, accelerometer (motion sensor), ambient light sensor and other sensors, light emitting diodes, and other status indicators, data ports, etc. Illustratively, a user may control the operation of the handset 11 by supplying commands via the I/O subsystem 26, and may use the output resources of the I/O subsystem 26 to receive status information and other outputs from the handset 11. For example, a user may activate the handset or deactivate the handset by pressing button 261.

The radio frequency system 24 may be any of the radio frequency systems described in any of the previous embodiments.

In the description of the present specification, reference to the description of the terms "one embodiment," "optionally," and the like 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 present invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A radio frequency system, comprising:

a radio frequency transceiver;

the transceiver circuit and target receiving circuit are configured to switchably connect at least two antennas of the antenna group, the target receiving circuit comprising at least one of the main set MIMO receiving circuit and the diversity receiving circuit;

the antenna group comprises a first antenna, a second antenna, a third antenna and a fourth antenna, wherein the antenna efficiency of the first antenna and the second antenna is higher than that of the third antenna and the fourth antenna, the radio frequency transceiver is used for configuring a target antenna connected to the main set of the receiving circuit according to the network information of the low frequency signals received by the main set of the receiving circuit and the diversity receiving circuit, and the target antenna is one of the first antenna and the second antenna.

2. The radio frequency system of claim 1, wherein the transceiver circuit and the diversity receive circuit are configured to switchably connect the first antenna and the second antenna, the main set MIMO receive circuit is configured to connect the third antenna, and the diversity receive circuit is further configured to connect the fourth antenna to support diversity MIMO reception of the low frequency signals.

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

and the first switching circuit is respectively connected with the transceiver circuit, the diversity receiving circuit, the first antenna and the second antenna and is used for switchably connecting the transceiver circuit and the diversity receiving circuit with the first antenna and the second antenna.

4. The radio frequency system according to claim 1, wherein the first antenna is configured as a default target antenna for transmission and main set reception of the low frequency signal, and wherein the second antenna is configured as the target antenna if a difference between a second signal strength of the low frequency signal received by the second antenna and a first signal strength of the low frequency signal received by the first antenna is greater than or equal to a preset threshold value within a preset time period.

5. The radio frequency system of claim 1, wherein the transceiver circuitry, the main set MIMO receive circuitry, and the diversity receive circuitry are configured to switchably connect the first antenna, the second antenna, the third antenna, and the fourth antenna.

6. The radio frequency system of claim 5, further comprising:

and the second switching circuit is respectively connected with the transceiver circuit, the main set MIMO receiving circuit, the diversity receiving circuit, the first antenna, the second antenna, the third antenna and the fourth antenna and is used for switchably connecting the transceiver circuit, the main set MIMO receiving circuit and the diversity receiving circuit with the first antenna, the second antenna, the third antenna and the fourth antenna.

7. The radio frequency system according to claim 5, wherein the radio frequency transceiver is configured to configure a target antenna connected to the main set of receiving circuits, the target antenna being one of the first antenna, the second antenna, the third antenna and the fourth antenna, according to network information of the low frequency signals received by the main set of receiving circuits, the main set of MIMO receiving circuits and the diversity receiving circuits.

8. The radio frequency system according to claim 7, wherein the first antenna is configured as a default target antenna for transmission and main set reception of the low frequency signal, and the second antenna is configured as the target antenna if a difference between a second signal strength of the low frequency signal received by the second antenna and a third signal strength of the low frequency signal received by any one of the first antenna, the third antenna, and the fourth antenna is greater than or equal to a preset threshold value within a preset time period.

9. The radio frequency system of claim 1, wherein the transceiver circuit comprises:

the input end of the transmitting and amplifying module is connected with the radio frequency transceiver and is used for supporting power amplification of a low-frequency signal output by the radio frequency transceiver;

the first filter module is connected with the output end of the transmitting and amplifying module and the main set receiving circuit respectively, and the second end of the first filter module is connected with one antenna in the antenna group and is used for carrying out filter processing on the low-frequency signal amplified by the transmitting and amplifying module and outputting the low-frequency signal to one antenna in the antenna group, and carrying out filter processing on the low-frequency signal received by one antenna in the antenna group and outputting the low-frequency signal to the main set receiving circuit.

10. The radio frequency system of claim 9, wherein the antenna group comprises a first antenna, a second antenna, a third antenna, and a fourth antenna, the transceiver circuit further comprising:

the first switching module is respectively connected with the second end of the first filtering module, the first antenna, the second antenna and the diversity receiving circuit and is used for switchably connecting the first filtering module and the diversity receiving circuit with the first antenna and the second antenna; or alternatively

And the second switching module is respectively connected with the second end of the first filtering module, the first antenna, the second antenna, the third antenna, the fourth antenna, the main set MIMO receiving circuit and the diversity receiving circuit and is used for switchably connecting the first filtering module, the main set MIMO receiving circuit and the diversity receiving circuit with the first antenna, the second antenna, the third antenna and the fourth antenna.

11. The radio frequency system according to claim 9, wherein the transceiver circuit is an integrated circuit configured with an input port, an output port, and a first antenna port; wherein:

The input end of the transmitting and amplifying module is connected with the radio frequency transceiver through the input port, and the first filtering module is connected with the main set receiving circuit through the output port and connected with an antenna in the antenna group through the first antenna port.

12. The radio frequency system according to claim 9, wherein the low frequency signal comprises a plurality of low frequency band radio frequency signals; the number of the first filtering modules is a plurality of; the transceiver circuit further includes:

the first end of the first gating module is connected with the output end of the emission amplifying module;

the first end of the second gating module is connected with one antenna in the antenna group;

the two first ends of each first filtering module are respectively connected with a second end of the first gating module and the main set receiving circuit in a one-to-one correspondence manner, the second end of each first filtering module is connected with a second end of the second gating module, and frequency bands of the low-frequency signals output by each first filtering module are different;

the first gating module and the second gating module are used for jointly selecting and conducting a radio frequency path between the transmitting and amplifying module and one antenna in the antenna group and a radio frequency path between the main set receiving circuit and one antenna in the antenna group.

13. The radio frequency system of claim 12, wherein at least one of the plurality of first filtering modules is a built-in first filtering module, the transmit amplification module, the first gating module, the second gating module, and the built-in first filtering module forming an integrated circuit configured with an input port, an output port, and a first antenna port; wherein:

the input port is respectively connected with the input end of the transmitting and amplifying module and the radio frequency transceiver, the output port is respectively connected with a first end of the built-in first filtering module and the main set receiving circuit, and the first antenna port is respectively connected with a first end of the second gating module and an antenna in the antenna group.

14. The radio frequency system of claim 12, wherein at least one of the plurality of first filter modules is an external first filter module, the transmit amplification module, the first gating module, and the second gating module forming an integrated circuit configured with an input port, an auxiliary transmit port, and a first antenna port; wherein:

The input port is respectively connected with the input end of the transmitting and amplifying module and the radio frequency transceiver, two first ends of each external first filtering module are respectively connected with the auxiliary transmitting port and the main set receiving circuit in a one-to-one correspondence mode, the second end of each external first filtering module is connected with the auxiliary receiving and transmitting port so as to be connected with a second end of the second gating module through the auxiliary receiving and transmitting port, and the first antenna port is respectively connected with the first end of the second gating module and an antenna of the antenna group.

15. The radio frequency system according to any of claims 1-14, wherein the main set MIMO receiving circuit comprises:

the second filtering module is respectively connected with the radio frequency transceiver and one antenna in the antenna group and is used for carrying out filtering processing on the received low-frequency signals;

the input end of the first amplifying module is connected with the second filtering module, and the output end of the first amplifying module is connected with the radio frequency transceiver and is used for amplifying the low-frequency signals after filtering.

16. The radio frequency system of claim 15, wherein the antenna efficiency of the antenna to which the main set MIMO receiving circuit is connected is lower than the antenna efficiency of the antenna to which the transceiving circuit is connected, the main set MIMO receiving circuit further comprising:

The output end of the second amplifying module is connected with the input end of the first amplifying module, and the input end of the second amplifying module is connected with the second filtering module and is used for amplifying the low-frequency signals after the filtering processing of the second filtering module.

17. The radio frequency system according to any one of claims 1-14, wherein the diversity receiving circuit comprises:

the third filtering module is connected with one antenna in the antenna group and is used for carrying out filtering processing on the received low-frequency signals;

the input end of the third amplifying module is connected with the third filtering module, and the output end of the third amplifying module is connected with the radio frequency transceiver and is used for amplifying the low-frequency signals after filtering;

the fourth filtering module is connected with one antenna in the antenna group and is used for carrying out filtering processing on the received low-frequency signals;

and the input end of the fourth amplifying module is connected with the fourth filtering module, and the output end of the fourth amplifying module is connected with the radio frequency transceiver and is used for amplifying the low-frequency signals after the filtering processing.

18. The radio frequency system of claim 17, wherein the antenna efficiency of the antenna to which the fourth filter module is coupled is lower than the antenna efficiency of the antenna to which the third filter module is coupled, the diversity receiving circuit further comprising:

and the input end of the fifth amplifying module is connected with the output end of the fourth amplifying module, and the output end of the fifth amplifying module is connected with the radio frequency transceiver and is used for carrying out secondary amplifying treatment on the low-frequency signal amplified by the fourth amplifying module.

19. The rf system of claim 17 wherein the low frequency signal comprises a plurality of low frequency band rf signals, the third and fourth filtering modules each being a plurality; the diversity reception circuit is configured with a second antenna port connected to an antenna of the antenna group and a third antenna port connected to an antenna of the antenna group, the diversity reception circuit further comprising:

the first end of the third gating module is connected with the third amplifying module;

the first end of the fourth gating module is connected with the fourth amplifying module;

A fifth gating module, wherein a second end of the fifth gating module is connected with the second antenna port;

each third filtering module is respectively connected with the third gating module and the fifth gating module, at least one of a plurality of fourth filtering modules is connected between the fourth gating module and the fifth gating module, and at least one of a plurality of fourth filtering modules is connected between the third antenna port and one antenna in the antenna group;

the third gating module, the fourth gating module and the fifth gating module are used for jointly selecting and conducting radio frequency paths between the third amplifying module and the second antenna port and between the fourth amplifying module and the third antenna port.

20. A communication device comprising a radio frequency system as claimed in any one of claims 1-19.