CN113949400B

CN113949400B - Radio frequency system and communication equipment

Info

Publication number: CN113949400B
Application number: CN202111449130.XA
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: 2022-12-13
Anticipated expiration: 2041-11-30
Also published as: CN113949400A

Abstract

The present application relates to a radio frequency system and a communication device, the radio frequency system including: a radio frequency transceiver; the receiving and transmitting circuit is used for carrying out power amplification and filtering processing on the low-frequency signal output by the radio frequency transceiver and carrying out filtering processing on the low-frequency signal received by the first antenna; the main set receiving circuit is used for receiving and amplifying the low-frequency signal which is output by the first antenna and filtered by the transceiving circuit; the master set MIMO receiving circuit is used for master set MIMO receiving of low-frequency signals; the diversity receiving circuit is used for diversity reception and diversity MIMO reception of low-frequency signals. The radio frequency system can support the transmission of low-frequency signals and 4 x 4MIMO functions, and compared with the radio frequency system which can only support the reception of 2 x 2MIMO low-frequency signals in the related technology, the downlink communication speed can be doubled in the environment with good signals; in a weak signal environment, compared with a radio frequency system only capable of supporting low-frequency signal 2 x 2MIMO receiving, the diversity gain can be doubled, and the receiving performance is greatly improved.

Description

Radio frequency system and communication equipment

Technical Field

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

Background

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

Disclosure of Invention

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

A radio frequency system, comprising:

a radio frequency transceiver;

the transceiving circuit is respectively connected with the radio frequency transceiver and the first antenna and is used for supporting power amplification and filtering processing of low-frequency signals output by the radio frequency transceiver and outputting the low-frequency signals to the first antenna and supporting filtering processing of low-frequency signals received by the first antenna;

the main set receiving circuit is connected with the transceiving circuit, is connected with a first antenna through the transceiving circuit, and is used for supporting receiving the low-frequency signal which is output by the first antenna and is filtered by the transceiving circuit and amplifying the low-frequency signal;

a master set MIMO receiving circuit, which is respectively connected with the radio frequency transceiver and the third antenna and is used for supporting master set MIMO receiving of the low-frequency signals;

and the diversity receiving circuit is respectively connected with the radio frequency transceiver, the second antenna and the fourth antenna and is used for supporting diversity reception and diversity MIMO reception of the low-frequency signals.

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, and can support the transmission of low-frequency signals and 4 x 4MIMO functions. When the radio frequency system is in an environment with good signals, the downlink communication rate can be doubled compared with the radio frequency system which can only support low-frequency signal 2 x 2mimo reception in the related art. When the radio frequency system is located at the edge of a cell, deep in a building, in an elevator and other weak signal environments, compared with the radio frequency system which can only support low-frequency signal 2 x 2MIMO reception 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 low-frequency signal 2 × 2mimo reception in the related art, the radio frequency system of the embodiment doubles the downlink communication rate and the coverage distance, and thus can improve the reception performance of the radio frequency system on low-frequency signals.

Drawings

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

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

FIG. 2 is a schematic diagram of the location of an antenna in one embodiment;

FIG. 3 is a second schematic diagram of an embodiment of a radio frequency system;

FIG. 4 is a third exemplary diagram of an RF system;

FIG. 5 is a third exemplary diagram illustrating an exemplary RF system;

FIG. 6 is a fourth schematic diagram illustrating an exemplary RF system;

FIG. 7 is a diagram illustrating an exemplary transceiver circuit;

FIG. 8 is a diagram illustrating one embodiment of a detailed structure of a transceiver circuit and a main set receiver circuit;

FIG. 9 is a fifth schematic diagram of an embodiment of a radio frequency system;

FIG. 10 is a second exemplary diagram of a transceiver circuit;

FIG. 11 is a second exemplary schematic diagram of the transceiver circuit and the main set receiver circuit;

FIG. 12 is a sixth schematic structural view of an RF system in accordance with an embodiment;

FIG. 13 is a seventh schematic diagram illustrating an exemplary RF system;

FIG. 14 is an eighth schematic block diagram of an exemplary RF system;

FIG. 15 is a ninth illustration of a schematic block diagram of an exemplary RF system;

fig. 16 is a schematic diagram showing a detailed structure of a diversity receiving circuit in one embodiment;

fig. 17 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 clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

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

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

As shown in fig. 1, in one embodiment, a radio frequency system provided in the embodiment of the present application includes: 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; the antenna further comprises a first antenna ANT1, a second antenna ANT2, a third antenna ANT3 and a fourth antenna ANT4. The main set receiving circuit 30, the main set MIMO receiving circuit 40, and the diversity receiving circuit 50 are configured to support a 4 × 4MIMO receiving function of low frequency signals in common. The MIMO (Multiple Input Multiple Output, multiple receive) technology is to use Multiple transmit antennas and Multiple receive antennas at a transmit port and a receive port, respectively, to fully utilize spatial resources, and implement Multiple transmit and Multiple receive through Multiple antennas, so that channel capacity of a system can be doubled without increasing spectrum resources and antenna transmit power.

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 the transceiving of the radio frequency signals of multiple NR low frequency bands. Each branch antenna may be formed using any suitable type of antenna. For example, each branch antenna may include an antenna with a resonating element formed from the following antenna structure: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and frequency band combinations. In the 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.

Optionally, the antenna efficiency of each of the first antenna ANT1 and the second antenna ANT2 is higher than that of each of the third antenna ANT3 and the fourth antenna ANT4. Generally, when the radio frequency system is applied to a communication device, due to the structural limitation of the communication device, as shown in fig. 2, the first antenna ANT1 and the second antenna ANT2 are usually disposed on the top frame 101 and the bottom frame 103 of the communication device, respectively, and the third antenna ANT3 and the fourth antenna ANT4 are disposed on the two

side frames

102 and 104 of the communication device, so that the efficiency of each of the first antenna ANT1 and the second antenna ANT2 is higher than that of each of the third antenna ANT3 and the fourth antenna ANT4.

In this embodiment, the low frequency signal may include a radio frequency signal of a low frequency band, or may include radio frequency signals of 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 frequency band division table for low frequency signals

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

Optionally, the low-frequency signals include N5, N8, N20, N28, and N71 band signals, and the radio frequency system may support a 4 × 4mimo reception function for the N5, N8, N20, N28, and N71 band signals.

In this embodiment, the rf transceiver 10 may be configured with a plurality of ports to achieve connection with the transceiver circuit 20, the main set receiving circuit 30, the main set MIMO receiving circuit 40 and the diversity receiving circuit 50. Alternatively, the rf transceiver 10 includes a transmitter for transmitting rf signals to the transceiver circuit 20 and a receiver for receiving rf signals output by the main set receiving circuit 30, the main set MIMO receiving circuit 40 and the diversity receiving circuit 50.

In this embodiment, the transceiver circuit 20 is respectively connected to the radio frequency transceiver 10 and the first antenna ANT1, and is configured to support power amplification and filtering processing on a low-frequency signal output by the radio frequency transceiver 10 and output the low-frequency signal to the first antenna ANT1, and support filtering processing on a low-frequency signal received by the first antenna ANT1; the master set receiving circuit 30 is connected with the transceiver circuit 20 to be connected with the first antenna ANT1 through the transceiver circuit 20, and is configured to support receiving the low-frequency signal output by the first antenna ANT1 and filtered by the transceiver circuit 20, and amplify the low-frequency signal; a master set MIMO receiving circuit 40, connected to the radio frequency transceiver 10 and the third antenna ANT3, respectively, and configured to support master set MIMO receiving of low-frequency signals; the diversity receiving circuit 50 is connected to the radio frequency transceiver 10, the second antenna ANT2, and the fourth antenna ANT4, respectively, and is configured to support diversity reception and diversity MIMO reception of low frequency signals.

Wherein the transceiver circuit 20 and the master receiver circuit 30 are configured to connect the same antenna, in particular, the master receiver circuit 30 is connected with the transceiver circuit 20 to connect the first antenna ANT1 through the transceiver circuit 20. The transceiver circuit 20 is configured to perform power amplification and filtering on the low-frequency signal and transmit the low-frequency signal to the first antenna ANT1, and further configured to perform filtering on the low-frequency signal received by the first antenna ANT1, and the master receiver circuit 30 is configured to perform amplification on the low-frequency signal received by the first antenna ANT1 and filtered by the transceiver circuit 20 and output the amplified low-frequency signal 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 is capable of supporting a receiving process of a low frequency signal, so as to collectively implement a 4 × 4MIMO receiving function of the low frequency signal. When the radio frequency system is in an environment with good signals, the downlink communication rate can be doubled compared with the radio frequency system which can only support the reception of 2 x 2MIMO low-frequency signals in the related art. If the radio frequency system is located at the edge of a cell, deep in a building, in an elevator and other weak signal environments, compared with the radio frequency system which can only support low-frequency signal 2 x 2MIMO reception in the related art, 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 low-frequency signal 2 × 2mimo reception in the related art, the radio frequency system of the embodiment doubles the downlink communication rate and the coverage distance, and thus can improve the reception performance of the radio frequency system on low-frequency signals.

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

The radio frequency system provided by the embodiment includes the radio frequency transceiver 10, the transceiver circuit 20, the main set receiver circuit 30, the main set MIMO receiver circuit 40, and the diversity receiver circuit 50, and can support transmission of low frequency signals and 4 × 4MIMO functions, and improve throughput of low frequency signals by multiple times. When the radio frequency system is in an environment with good signals, the downlink communication rate can be doubled compared with the radio frequency system which can only support the reception of 2 x 2MIMO low-frequency signals in the related art. If the radio frequency system is located at the edge of a cell, deep in a building, in an elevator and other weak signal environments, compared with the radio frequency system which can only support low-frequency signal 2 x 2MIMO reception in the related art, 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 low-frequency signal 2 × 2mimo reception in the related art, the radio frequency system of the embodiment doubles the downlink communication rate and the coverage distance, and thus can improve the reception performance of the radio frequency system on low-frequency signals.

In one embodiment, as shown in fig. 3, the transceiver circuit 20 includes:

the input end of the transmission amplifying module 210 is connected to the radio frequency transceiver 10, and is configured to support power amplification of the low-frequency signal output by the radio frequency transceiver 10; the first filtering module 200 is configured, 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 master set receiving circuit 30, and a second end of the first filtering module 200 is connected to the first antenna ANT1, and is configured to perform filtering processing on the low-frequency signal after power amplification by the transmitting and amplifying module 210 and output the low-frequency signal to the first antenna ANT1, and perform filtering processing on the low-frequency signal received by the first antenna ANT1 and output the low-frequency signal to the master set receiving circuit 30.

The transmitting and amplifying module 210 is configured to perform power amplification on a low-frequency signal output by the radio frequency transceiver 10, and the first filtering module 200 is configured to filter a received signal to filter signals other than the low-frequency signal, and only output the low-frequency signal, and meanwhile, may also be configured to isolate signals of the transmitting and amplifying module 210 and the main set receiving circuit 30, for example, separate a transmitting and receiving path of the low-frequency signal according to a signal direction of the low-frequency signal 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 configured as two Modules, and optionally, 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) with 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. 4, the transceiver circuit 20 is configured with an input port PA IN, an output port RX, and a first antenna port LB ANT1; wherein: the input terminal of the transmission amplifying module 210 is connected to the rf transceiver through the input port PA IN, and the first filtering module 200 is connected to the main set receiving circuit 30 through the output port RX and connected to the first antenna ANT1 through the first antenna port LB ANT1.

Optionally, the first filtering module 200 may be a duplexer or a filter, and when the low-frequency signal is a radio-frequency signal of a single low-frequency band, for example, an N28-band signal, the first filtering module may perform filtering processing on stray waves 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 of a plurality of low-frequency bands, a plurality of first filtering modules or a plurality of duplexers or filters may be provided, so as to perform filtering processing on each low-frequency signal, and output a plurality of low-frequency signals to the first antenna ANT1 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 to 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 to the first antenna ANT1; when the first filtering module 200 includes filters, the first filtering module 200 may specifically include two filters and a switch device, first ends of the two filters are respectively connected to two first ends of the switch device, second ends of the two filters are respectively connected to the output end of the transmitting and amplifying module 210 and the main set receiving circuit 30 in a one-to-one correspondence manner, and a second end of the switch device is connected to the first antenna ANT1.

In one embodiment, as shown in fig. 5 (fig. 5 illustrates two first filtering modules 200 as an example), the low-frequency signal includes radio frequency signals of a plurality of low-frequency bands; the number of the first filtering modules 200 is multiple; the transceiver circuit 20 further comprises: a first gating module 220, a second gating module 230.

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, a second end of the first filtering module 200 is connected to a second end of the second gating module 230, and frequency bands of 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 one duplexer, the low-frequency signals are signals of five different frequency bands N5, N8, N20, N28, and N71, and five duplexers may be correspondingly disposed to implement filtering processing on the five low-frequency signals. It should be noted that, when it is necessary to support the relevant processing of the low-frequency signals of multiple different frequency bands, one first filtering module 200 may also be provided, for example, the first filtering module 200 includes multiple duplexers.

A first end of the first gating module 220 is connected to the transmission amplifying module 210, a second end of the first gating module 220 is connected to the first filtering module 200, a first end of the second gating module 230 is connected to the first filtering module 200, and a second end of the second gating module 230 is connected to the first antenna ANT1, so as to selectively turn on radio frequency paths between the transmission amplifying module 210 and the first antenna ANT1 and between the master set receiving circuit 30 and the first antenna ANT1, so that the first gating module 220 and the second gating module 230 can reduce insertion loss of the transceiver circuit 20 through the first gating module 220 and the second gating module 230 for transmission paths and reception paths of a plurality of low frequency signals, and further improve output power of the transceiver circuit 20. Specifically, the first gating module 220 and the second gating module 230 are multi-channel selection switches, respectively.

Optionally, as shown in fig. 5, the transceiver circuit 20 further includes:

and a coupling module 240, respectively connected to the second gating module 203 and the first antenna ANT1, for coupling the low-frequency signal in the radio frequency path between the second gating module 203 and the first antenna ANT1.

Specifically, the coupling module 240 is configured with a coupling output end, and the coupling module 240 is connected to the second gating module 203 and the first antenna ANT1, respectively, and couples a low-frequency signal in a radio frequency path between the second gating module 203 and the first antenna ANT1 to output a coupled signal. The coupling signal comprises a forward coupling signal and a backward 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 terminal, 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. 5, 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 amplification module 250 and the 2G high frequency amplification module 260 can respectively realize amplification processing on the 2G low frequency signal and the 2G high frequency signal. The input ends of the 2G low-frequency amplification module 250 and the 2G high-frequency amplification module 260 are connected to the radio frequency transceiver 10, the output end of the 2g low-frequency amplification module 250 is connected to the second gating module 230, and the output end of the 2g high-frequency amplification module 260 may be connected to the fifth antenna ANT5.

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 terminal of the transmission amplifying module 210 and the rf transceiver 10, the output port is connected to a first terminal of the built-in first filtering module and the main set receiving circuit 30, and the first antenna port is connected to a first terminal of the second gating module 230 and the first antenna ANT1.

Through integration, the area of a main board occupied by a radio frequency system can be reduced, the integration level of devices is improved, the miniaturization of the devices 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 transceiver circuit 20 and the main receiver 30 to the low-frequency signals is improved, the sensitivity performance of the low-frequency signals is improved, and the communication performance of the radio frequency system can be improved.

At least one of the plurality of first filtering modules 200 is a built-in first filtering module, and includes: one of the plurality of first filtering modules 200 is an internal first filtering module, and the remaining other first filtering modules 200 are external first filtering modules; a plurality of the first filter modules 200 are internal first filter modules, and the remaining other first filter modules 200 are external first filter modules; the plurality of first filtering modules 200 are all built-in first filtering modules. The internal first filtering module is an integrated circuit formed by the first filtering module 200, the transmitting and amplifying module 210, the first gating module 220, the second gating module 230 and the like, and the external first filtering module is an integrated circuit formed by the first filtering module 200 arranged outside the integrated circuit and arranged in parallel with the integrated circuit.

Based on the embodiment in fig. 5, as shown in fig. 6, the description is given by taking as an example that each of the plurality of first filtering modules 200 is a built-in first filtering module (only two first filtering modules 200 are shown in fig. 6):

the plurality of first filtering modules 200 are all built-IN first filtering modules, the transmitting amplification module 210, the first gating module 220, the second gating module 230 and all the first filtering 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 terminal of the transmission amplifying module 210 and the rf transceiver 10, the output port RX is connected to a first terminal of the first filter module and the main-set receiving circuit 30, and the first antenna port LB ANT1 is connected to a first terminal of the second gating module 230 and the first antenna ANT1.

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, 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. 7 (fig. 7 shows 4 built-in first filtering modules), the transmitting and 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 duplexer DU. The input end of the power amplifier LB PA1 is connected with the input port LNA IN; the first end of multichannel selection switch SP8T1 is connected with power amplifier LB PA 1's output, and the first end of a plurality of duplexer DU is connected to a plurality of second ends one-to-one respectively of multichannel selection switch SP8T1, and output port RX is connected to the first end of a plurality of duplexer DU, and the second end of a plurality of duplexer DU is connected and is included multichannel selection switch SP8T 2's second end, and coupler Co is connected to multichannel selection switch SP8T 2's first end.

Specifically, when the frequency band of the low-frequency signal is a preset frequency band, the power amplifier LB PA1 and the duplexer may support the related processing of the frequency band signal 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, a plurality of second ends of the multichannel selective switch SP8T1 are respectively connected with the first ends of the plurality of first filtering modules in a one-to-one correspondence manner, so that the power amplifier LB PA1 and the plurality of duplexers can also support the related processing of the low-frequency signals of a plurality of different frequency bands, and the low-frequency signals of each frequency band without clutter can be correspondingly output. It is understood that the power amplifier LB PA1, the multi-channel selection switch SP8T1 and the plurality of duplexers form filtering paths in the plurality of transmit paths, which are independent of each other and do not overlap each other. It should be noted that, when the transmission amplifying module 210 only needs to transmit a low-frequency signal in one frequency band, the number of the second terminals of the multi-channel selection switch SP8T1 may be only one, and the number of the duplexers is one.

Further optionally, as shown in fig. 7, the 2G low frequency amplifying module 250 includes a power amplifier 2G LB PA and a filter F1; the 2G high frequency 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 respectively configured to amplify the 2G low-frequency signal and the 2G high-frequency signal, and the filter F1 and the filter F2 are respectively configured to filter the 2G low-frequency signal and the 2G high-frequency signal.

Alternatively, on the basis of the embodiment of fig. 7, as shown in fig. 8, 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.

The low noise amplifier LNA1, the output end of the low noise amplifier LNA1 is connected with the radio frequency transceiver 10; a first end of the multi-channel selection switch SP4T1 is connected to the input end of the low noise amplifier LNA1, a second end of the multi-channel selection switch SP4T1 is connected to a first end of the first filter module 200 through the output port RX, and 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 ANT1. The radio frequency access between the low noise amplifier LNA1 and the first antenna port LB ANT1 is selectively conducted through the multi-channel selection switch SP4T1, so that 5G radio frequency signals of different frequency bands are selectively subjected to low noise amplification processing, the number of the low noise amplifiers LNA1 is reduced, and the area of a mainboard occupied by devices is reduced. Note that, when low-noise amplification processing needs to be performed on 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 configured to connect to the sixth antenna to support receiving the intermediate frequency signal and the high frequency signal, as shown in fig. 8, 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 receive the intermediate frequency signal and the high frequency signal.

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

the transmission process of the N28 low-frequency signal: the radio frequency transceiver 10 outputs an N28 transmission signal to the integrated circuit 201 through the input port PA IN, performs signal amplification through the power amplifier LB PA1, performs filtering processing through the multi-channel selection switch SP8T1 and the duplexer, 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 first antenna ANT1.

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

IN one embodiment, at least one of the plurality of first filtering modules 200 is an external first filtering module, the transmission amplifying module 210, the first gating module 220 and the second gating module 230 form an integrated circuit, and the integrated circuit is configured with an input port PA IN, an auxiliary transmission port, an auxiliary reception port and a first antenna port LB ANT1; wherein:

the input port PA IN is connected to the input terminal of the transmission amplifying module 210 and the rf transceiver, the two first terminals of each external first filtering module 200 are connected to the auxiliary transmission port and the main set receiving circuit IN a one-to-one correspondence manner, the second terminal of each external first filtering module 200 is connected to the auxiliary receiving port to connect a second terminal of the second gating module 230 through the auxiliary receiving port, and the first antenna port LB ANT1 is connected to the first terminal of the second gating module 230 and the first antenna, respectively.

By 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 receiver 30 can be filtered, and the isolation of the external first filtering module on the low-frequency signals can be improved.

At least one of the first filtering modules 200 is an external first filtering module, and includes: one of the first filter modules 200 is an external first filter module, and the remaining first filter modules 200 are internal first filter modules; a plurality of the first filter modules 200 are external first filter modules, and the remaining first filter modules 200 are internal first filter 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.

In the embodiment of fig. 5, as shown in fig. 9, one of the first filter modules 200 is an external first filter module 200A (only one internal first filter module 200B is shown in fig. 9, 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 transmission amplifying module 210, the first gating module 220 and the second gating module 230 form an integrated circuit 202, and the integrated circuit 202 is configured with an input port PA IN, an auxiliary transmission port LB TXOU, an auxiliary transceiving port LB _ TRX and a first antenna port LB ANT1; the input port PA IN is connected to the input end of the transmission amplifying module 210 and the rf transceiver 10, two first ends of the external first filtering module 200A are connected to the auxiliary transmitting port LB TXOU and the master set receiving circuit 30 IN a one-to-one correspondence manner, a second end of the external first filtering module 200A is connected to the auxiliary transmitting/receiving port LB _ TRX to be connected to a second end of the second gating module 230 through the auxiliary transmitting/receiving port LB _ TRX, and the first antenna port LB ANT1 is connected to the first end of the second gating module 230 and the first antenna ANT1, respectively.

The radio frequency path between the transmission amplifying module 210 and the first antenna port LB ANT1 specifically includes: a transmitting path between the transmitting amplifying module 210, the external first filtering module 200A and the first antenna port LB ANT1, and a transmitting path between the transmitting amplifying module 210, the internal first filtering module 200B and the first antenna port LB ANT1; the rf path between the master set receiving circuit 30 and the first antenna port LB ANT1 specifically includes: a receiving path between the master set receiving circuit 30, the external first filtering module 200A and the first antenna port LB ANT1, and a receiving path between the master set receiving circuit 30, the internal first filtering module 200B and the first antenna port LB ANT1.

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. 10, the transmission 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. 10, as shown in fig. 11, the main set receiving circuit 30 includes:

the 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 multichannel selector switch SP4T1, multichannel selector switch SP4T1 connects the input of low noise amplifier LNA1, and the first end of external first filter module 200A is connected to the second end of multichannel selector switch SP4T1, is connected with first antenna port LB ANT1 through external first filter module 200A in order to receive the low frequency signal of first antenna port LB ANT1 input. When the main receiver 30 receives a plurality of low-frequency signals of different frequency bands, the second terminal of the channel selection switch SP4T1 is connected to the first terminal of the built-in first filtering module 200B, and is connected to the first antenna port LB ANT1 through the built-in first filtering module 200B to receive the low-frequency signal input from the first antenna port LB ANT1. The detailed description of the low noise amplifier LNA1 and the multi-channel selection switch SP4T1 refers to the detailed description of the above embodiments, and is not repeated herein.

It should be noted that, the main set receiving circuit 30 may also be configured to connect to the sixth antenna to support receiving the intermediate frequency signal and the high frequency signal, as shown in fig. 11, the main set receiving circuit 30 may further include a plurality of low noise amplifiers LNA2 and multi-channel selection switches SP4T2, so as to receive the intermediate frequency signal and the high frequency signal.

and (3) transmitting the N28 low-frequency signal: the rf transceiver 10 outputs an N28 transmit signal to the transceiver circuit 20 through the input port PA IN, performs signal amplification through the power amplifier LB PA1, outputs the signal to the auxiliary input port PA innna IN through the multi-channel selection switch SP8T1 to reach the external first filter module 200A, and the external first filter module 200A performs filtering processing and then 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, and finally reaches the first antenna ANT1.

Main set receiving process of N28 low-frequency signals: the first antenna ANT1 receives N28 low-frequency signals from the space, the N28 low-frequency signals enter the transceiver circuit 20 through the first antenna port LB ANT1, enter the external first filter module 200A through the coupler Co, the multi-channel selection switch SP8T2 and the auxiliary transceiver port LB _ TRX for filtering, enter the low noise amplifier LNA1 of the main receiver circuit 30 through the auxiliary output port RXLNA OUT for amplification, and then are output to the radio frequency transceiver 10.

As shown in fig. 12, in one embodiment, the main set MIMO receiving circuit 40 includes:

the second filtering module 401 is respectively connected to the radio frequency transceiver 10 and the third antenna ANT3, and is configured to perform filtering processing on a low-frequency signal received by the third antenna ANT3; an input end of the first amplifying module 402 is connected to the second filtering module 401, and an output end of the first amplifying module 402 is connected to the radio frequency transceiver 10, and is configured to amplify 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 perform filtering and amplifying on the low frequency signal received by the third antenna ANT3, and output the low frequency signal after the filtering and amplifying to the radio frequency transceiver 10, thereby implementing the master MIMO reception of the master MIMO receiving circuit 40.

For convenience of description, the signal receiving process of the dominant set MIMO receiving circuit 40 in this embodiment is described by taking the low frequency signal as an N28 band signal as an example:

dominant set MIMO reception process of N28 low frequency signals: the third antenna ANT3 receives the N28 low frequency signal from the space, and the N28 low frequency signal is filtered by the second filtering module 401, amplified by the first amplifying module 402, and then enters the rf transceiver 10.

Optionally, the reception efficiency of the third antenna ANT3 is smaller than that of the first antenna ANT1, as shown in fig. 13, the master set MIMO receiving circuit 40 further includes:

an output end of the second amplifying module 403 is connected to an output end of the first amplifying module 402, and an input end of the second amplifying module 403 is connected to the second filtering module, and is configured to amplify the low-frequency signal filtered by the second filtering module.

By providing the second amplification module 403 at a position close to the third antenna ANT3 side in the master MIMO receiving circuit 40, the receiving performance of the master MIMO receiving circuit 40 can be improved, and the problems of low efficiency and large insertion loss of first-order 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 disposed between the radio frequency transceiver 10 and the second filtering module.

As shown in fig. 14 (fig. 14 only shows the rf transceiver 10, the diversity receiving circuit 50, the second antenna ANT2, and the fourth antenna ANT 4), in one embodiment, the diversity receiving circuit 50 includes:

the third filtering module 501 is connected to the radio frequency transceiver 10 and the second antenna ANT2, respectively, and configured to perform filtering processing on the low-frequency signal received by the second antenna ANT 2.

An input end of the third amplifying module 502 is connected to the third filtering module 501, and an output end of the third amplifying module 502 is connected to the radio frequency transceiver 10, and is configured to amplify the low-frequency signal after filtering.

The fourth filtering module 503 is connected to the radio frequency transceiver 10 and the fourth antenna ANT4, respectively, and is configured to perform filtering processing on the low-frequency signal received by the fourth antenna ANT4.

An input end of the fourth amplifying module 504 is connected to the fourth filtering module 503, and an output end of the fourth amplifying module 504 is connected to the radio frequency transceiver 10, and is configured to amplify the low-frequency signal after filtering.

The third filtering module 501 and the fourth filtering module 503 may both be filters, and the third amplifying module 502 and the fourth amplifying module 504 may both be low noise amplifiers. The third filtering module 501 and the third amplifying module 502 may perform filtering and amplifying processing on the low-frequency signal received by the second antenna ANT2, and output the low-frequency signal after the filtering and amplifying processing 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 and amplifying on the low frequency signal received by the fourth antenna ANT4, and output the low frequency signal after the filtering and amplifying to the radio frequency transceiver 10, so as to implement diversity MIMO reception of the diversity receiving circuit 50.

Optionally, the reception efficiency of the fourth antenna ANT4 is smaller than that of the second antenna ANT2, as shown in fig. 15 (fig. 15 only shows the rf transceiver 10, the diversity reception circuit 50, the second antenna ANT2, and the fourth antenna ANT 4), the diversity reception circuit 50 further includes:

an input end of the fifth amplification module 505 is connected to an output end of the fourth amplification module 504, and an output end of the fifth amplification module 505 is connected to the radio frequency transceiver 10, and is configured to perform secondary amplification processing on the low-frequency signal amplified by the fourth amplification 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 radio frequency signals of a plurality of low-frequency bands, and the number of the third filtering module 501 and the number of the fourth filtering module 503 are multiple; the diversity reception circuit 50 is configured with a second antenna port LB ANT2 and a third antenna port LB ANT3; the third antenna port LB ANT3 is connected to a third filtering module 501, as shown in fig. 16, and the diversity receiving circuit 50 further includes:

a third gating module 506, wherein 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; and a fifth gating module 508, wherein a second end of the fifth gating module 508 is connected to a port to which the second antenna ANT2 is connected.

Each third filtering module 501 is respectively connected with a third gating module 506 and a fifth gating module 508, and at least one of the fourth filtering modules 503 is respectively connected with a fourth gating module 507 and the fifth gating module 508; the third gating module 506, the fourth gating module 507, and the fifth gating module 508 are configured to jointly select and conduct the rf paths between the third amplifying module 502 and the second antenna ANT2, and between the fourth amplifying module 504 and the fourth antenna ANT4. So that the diversity receiving circuit 50 can support the amplification processing of low frequency signals of a plurality of different frequency bands.

Here, the diversity receiving circuit 50 is configured with a port to which the second antenna ANT2 is connected and a third antenna port LB ANT3, and the diversity receiving circuit 50 may be understood as LFEM (Low noise amplifier front end module). By integrating the diversity receiving circuit 50, the area of a main board occupied by a radio frequency system can be reduced, the integration level of devices is improved, the miniaturization of the devices 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 can be improved, the sensitivity performance of the low-frequency signal can be improved, and the communication performance of a radio frequency system can be improved.

In this embodiment, at least one of the plurality of fourth filtering modules 503 is disposed outside the LFEM module, and the other fourth filtering modules 503, the third filtering module 501, the third amplifying module 502, and the fourth amplifying module 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. 16, 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 manner, 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 manner. The sixth gating module 509 can selectively turn on the rf path between the output port LNA OUT of the diversity receiving circuit 50 and the third and

fourth amplifying modules

502 and 504.

Further optionally, as shown in fig. 16, the third gating module 506, the fourth gating module 507, the fifth gating module 508, and the sixth gating module 509 correspond 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, respectively. The third filtering module 501 and the fourth filtering module 503 are filters F and F, respectively, and the third amplifying module 502 and the fourth amplifying module 504 are a low noise amplifier LNA7 and a low noise amplifier LNA8, respectively.

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

diversity reception process of N28 low frequency signal: the second antenna ANT2 receives the N28 low frequency signal from the space, and the N28 low frequency signal is filtered by the filter F3, amplified by the low noise amplifier LNA7, and then output to the radio frequency transceiver 10.

Diversity MIMO reception process of N28 low frequency signals: the fourth antenna ANT4 receives the N28 low-frequency signal from the space, and the N28 low-frequency signal is filtered by the filter F6, amplified by the low noise amplifier LNA8, and then output to the radio frequency transceiver 10.

Further optionally, as shown in fig. 16, the diversity receiving circuit 50 is further configured with a medium-high frequency antenna port MHB ANT, and the diversity receiving circuit 50 is further configured to connect the fifth antenna to support reception of the medium-frequency signal and the high-frequency signal, and perform filtering and amplifying processing on the medium-high frequency radio frequency signal. 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.

The embodiment of the application further 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, transmission and 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 transmission power; the download rate can be improved to improve the user experience, and meanwhile, when the communication equipment is positioned at the edge of a cell, deep in a building, in an elevator and other weak signal environments, the 4 x 4MIMO receiving mode is adopted, so that higher diversity gain and larger coverage distance are achieved; the device has high integration level, the area of the substrate occupied by each device in the radio frequency system is reduced, meanwhile, the layout and wiring can be simplified, and the cost is saved.

As shown in fig. 17, further taking the communication device as an example to illustrate a mobile phone 11, specifically, as shown in fig. 17, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer-readable storage media), a processor 22, a peripheral device interface 23, a radio frequency system 24, and an input/output (I/O) subsystem 26. These components optionally communicate over one or more communication buses or signal lines 29. It will be appreciated by those skilled in the art that the handset 11 shown in figure 17 is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. The various components shown in fig. 17 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.

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

The processor 22 and other control circuitry, such as control circuitry in the radio frequency system 24, may be used to control the operation of the handset 11. The processor 22 may be based on one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management 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 switches in the radio frequency system 24.

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

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

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

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

Claims

1. A radio frequency system, comprising:

a radio frequency transceiver;

the diversity receiving circuit is respectively connected with the radio frequency transceiver, the second antenna and the fourth antenna and is used for supporting diversity reception and diversity MIMO reception of the low-frequency signals;

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 the low-frequency signal output by the radio frequency transceiver;

the two first ends of the first filtering module are respectively connected with the output end of the transmitting and amplifying module and the main set receiving circuit, and the second end of the first filtering module is connected with the first antenna and is used for filtering the low-frequency signals after the power amplification of the transmitting and amplifying module and outputting the low-frequency signals to the first antenna and filtering the low-frequency signals received by the first antenna and outputting the low-frequency signals to the main set receiving circuit.

2. The radio frequency system according to claim 1, 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 the first antenna through the first antenna port.

3. The radio frequency system according to claim 1, wherein the low frequency signal comprises a plurality of low frequency band radio frequency signals; the number of the first filtering modules is multiple; the transceiver circuit further comprises:

the first end of the first gating module is connected with the output end of the transmitting amplification module;

a second gating module, wherein a first end of the second gating module is connected with the first antenna;

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 the 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 amplification module and the first antenna and a radio frequency path between the main set receiving circuit and the first antenna.

4. The radio frequency system according to claim 3, wherein at least one of the plurality of first filtering modules is a built-in first filtering module, the transmission amplifying module, the first gating module, the second gating module, and the built-in first filtering module form an integrated circuit 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 and the radio frequency transceiver, the output port is connected to a first end of the built-in first filtering module and the main set receiving circuit, and the first antenna port is connected to a first end of the second gating module and the first antenna.

5. The radio frequency system according to claim 3, wherein at least one of the plurality of first filtering modules is an external first filtering module, the transmit amplifying module, the first gating module and the second gating module form an integrated circuit configured with an input port, an auxiliary transmit port, an auxiliary transceiver 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 integrated receiving circuit in a one-to-one correspondence manner, a second end of each external first filtering module is connected with the auxiliary receiving port so as to be connected with a second end of the second gating module through the auxiliary transmitting and receiving port, and the first antenna port is respectively connected with the first end of the second gating module and the first antenna.

6. The radio frequency system according to any of claims 1-5, wherein the master set MIMO receive circuitry comprises:

the second filtering module is respectively connected with the radio frequency transceiver and the third antenna and is used for filtering the low-frequency signal received by the third antenna;

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.

7. The radio frequency system of claim 6, wherein the reception efficiency of the third antenna is less than the reception efficiency of the first antenna, the main set MIMO receive circuitry further comprising:

and the output end of the second amplification module is connected with the output end of the first amplification module, and the input end of the second amplification module is connected with the second filtering module and used for amplifying the low-frequency signal filtered by the second filtering module.

8. The radio frequency system according to any of claims 1 to 5, wherein the diversity reception circuit comprises:

the third filtering module is respectively connected with the radio frequency transceiver and the second antenna and is used for filtering the low-frequency signal received by the second antenna;

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 signal after filtering;

the fourth filtering module is respectively connected with the radio frequency transceiver and the fourth antenna and is used for filtering the low-frequency signal received by the fourth antenna;

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 filtering.

9. The radio frequency system according to claim 8, wherein a reception efficiency of the fourth antenna is smaller than a reception efficiency of the second antenna, the diversity reception circuit further comprising:

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

10. The radio frequency system according to claim 8, wherein the low frequency signal includes a plurality of low frequency band radio frequency signals, and the number of the third filtering module and the fourth filtering module is plural; the diversity receive circuit is configured with a second antenna port and a third antenna port; the third antenna port is connected to one of the third filtering modules, and the diversity receiving circuit further includes:

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

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

a fifth gating module, a second end of the fifth gating module being connected to the second antenna port;

each third filtering module is respectively connected with the third gating module and the fifth gating module, and at least one of the fourth filtering modules is respectively connected with the fourth gating module and the fifth gating module;

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

11. The radio frequency system according to claim 1, wherein the low frequency signal comprises at least one of N5, N8, N20, N28, N71 frequency bands.

12. A communication device comprising a radio frequency system according to any of claims 1-11.