CN218679065U

CN218679065U - Radio frequency system and communication equipment

Info

Publication number: CN218679065U
Application number: CN202222723372.XU
Authority: CN
Inventors: 陈锋; 仝林
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-03-21
Anticipated expiration: 2032-10-14

Abstract

The application relates to a radio frequency system and communication equipment, comprising a radio frequency transceiver, a first transceiver circuit, a second transceiver circuit, a first receiving circuit and a second receiving circuit which are respectively connected with the radio frequency transceiver, wherein the first transceiver circuit is connected with a target antenna group, at least one circuit of the second transceiver circuit, the first receiving circuit and the second receiving circuit is configured as a target switching circuit connected with the first transceiver circuit, each target switching circuit is switchably connected to one antenna in the target antenna group through the first transceiver circuit, and low-frequency signals received and processed by the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit are respectively from different antennas, so that the radio frequency system can support double-path transmission and 4 x 4MIMO receiving functions of the low-frequency signals, and the channel capacity and the receiving performance of the radio frequency system are improved exponentially; the receiving and transmitting efficiency of the first receiving and transmitting circuit can be improved, and therefore the communication performance of the radio frequency system is further 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, the 5G mobile communication technology is gradually beginning to be applied to communication 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 and transmitting performance for 5G low-frequency signals (e.g., N28 frequency band signals) in poor signal areas such as cell edges, building depths or elevators.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a radio frequency system and communication equipment, which can realize two-way transmission and four-way reception of low-frequency signals so as to improve the channel capacity, the transmitting performance and the receiving performance of the radio frequency system, and can also improve the transmitting and receiving efficiency of a first transmitting and receiving circuit so as to further improve the working communication performance of the radio frequency system.

A first aspect of the present application provides a radio frequency system, comprising: the radio frequency transceiver comprises a radio frequency transceiver, and a first transceiving circuit, a second transceiving circuit, a first receiving circuit and a second receiving circuit which are respectively connected with the radio frequency transceiver; the first transceiver circuit and the second transceiver circuit are respectively used for supporting the transmission and receiving processing of low-frequency signals; the first receiving circuit and the second receiving circuit are respectively used for supporting the receiving processing of the low-frequency signal; wherein:

the first transceiver circuit is connected with a target antenna group, at least one of the second transceiver circuit, the first receiver circuit and the second receiver circuit is configured as a target switching circuit connected with the first transceiver circuit, each target switching circuit is switchably connected to one antenna in the target antenna group through the first transceiver circuit, and the low-frequency signals received and processed by the first transceiver circuit, the second transceiver circuit, the first receiver circuit and the second receiver circuit are from different antennas.

A second aspect of the present application provides a communication device, comprising:

a radio frequency system as described above.

The radio frequency system and the communication equipment comprise a radio frequency transceiver, and a first transceiver circuit, a second transceiver circuit, a first receiving circuit and a second receiving circuit which are respectively connected with the radio frequency transceiver, wherein the first transceiver circuit is connected with a target antenna group, at least one circuit of the second transceiver circuit, the first receiving circuit and the second receiving circuit is configured as a target switching circuit connected with the first transceiver circuit, each target switching circuit is switchably connected to one antenna in the target antenna group through the first transceiver circuit, and the low-frequency signals received and processed by the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit are respectively from different antennas, so that on one hand, the radio frequency system can support double-path transmission and 4 x 4 receiving functions on the low-frequency signals through the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit, and the channel capacity and the receiving performance of the radio frequency system are doubled; on the other hand, through the switching of the antennas in the target antenna group, the antenna with better antenna efficiency is used as the antenna supporting the transceiving processing function of the first transceiving circuit, so that the transceiving efficiency of the first transceiving circuit is improved, and the working communication performance of the radio frequency system is further improved.

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 block diagram of an embodiment of a radio frequency system;

FIG. 2 is a second block diagram of the RF system according to an embodiment;

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

FIG. 4 is a block diagram of an embodiment of a RF system;

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

FIG. 6 is a sixth block diagram illustrating an exemplary RF system;

FIG. 7 is a seventh block diagram illustrating the structure of the RF system according to an embodiment;

FIG. 8 is an eighth block diagram illustrating the architecture of an exemplary RF system;

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

FIG. 10 is a block diagram showing the structure of an RF system according to an embodiment;

FIG. 11 is an eleventh block diagram illustrating an exemplary RF system;

FIG. 12 is a twelfth block diagram of the architecture of the RF system of one embodiment;

FIG. 13 is a detailed circuit diagram of an embodiment of a radio frequency system;

FIG. 14 is a second exemplary circuit diagram of an RF system according to an embodiment;

FIG. 15 is a third exemplary circuit diagram of an RF system according to an embodiment;

FIG. 16 is a fourth specific circuit diagram of the RF system according to one embodiment;

FIG. 17 is a fifth exemplary circuit diagram of an RF system according to one embodiment;

fig. 18 is a block diagram of a communication device in an embodiment.

Detailed Description

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

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another element, and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

The radio frequency system according to the embodiment of the present application may be applied to a communication device having a wireless communication function, where the communication device may be a handheld device, a smart car, 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.

Fig. 1 is a block diagram of a radio frequency system according to an embodiment, and referring to fig. 1, in the embodiment, the radio frequency system includes a radio frequency transceiver 10, and a first transceiver circuit 20, a second transceiver circuit 30, a first receiver circuit 40, and a second receiver circuit 50 respectively connected to the radio frequency transceiver 10.

The first transceiver circuit 20 and the second transceiver circuit 30 are respectively used for supporting the transmission and reception processing of low-frequency signals; a first receiving circuit 40 and a second receiving circuit 50, which are respectively used for supporting the receiving processing of the low-frequency signal; wherein: the first transceiver circuit 20 is connected to a target antenna group, at least one of the second transceiver circuit 30, the first receiver circuit 40 and the second receiver circuit 50 is configured as a target switching circuit (fig. 1 illustrates the first receiver circuit 40 as the target switching circuit, which is only schematic and not limited, and fig. 1 also illustrates the target antenna group as the target switching circuit, which includes the first antenna ANT1 and the second antenna ANT2, and the other antennas as the third antenna ANT3 and the fourth antenna ANT 4), each target switching circuit is switchably connected to one antenna in the target antenna group through the first transceiver circuit 20, and low-frequency signals received and processed by the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40 and the second receiver circuit 50 are from different antennas.

The radio frequency transceiver 10 is respectively connected to the first transceiver circuit 20, the second transceiver circuit 30, the first receiving circuit 40 and the second receiving circuit 50, and is configured to output low frequency signals to the first transceiver circuit 20 and the second transceiver circuit 30, so as to perform transmission processing through the first transceiver circuit 20 and the second transceiver circuit 30, respectively; and is further configured to receive the low-frequency signals received and processed by the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40, and the second receiver circuit 50, respectively.

The low-frequency signals received and processed by the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40 and the second receiver circuit 50 are from different antennas; the first transceiving circuit 20 and the second transceiving circuit 30 each include a transmitting path and a receiving path, the transmitting path is configured to perform power amplification processing on a low-frequency signal output by the radio frequency transceiver 10 and then output the low-frequency signal, the receiving path is configured to perform low-noise amplification processing on the received low-frequency signal and then output the low-frequency signal to the radio frequency transceiver 10, the transmitting path and the receiving path of the first transceiving circuit 20 are configured to be connected to the same antenna, and the transmitting path and the receiving path of the second transceiving circuit 30 are configured to be connected to the same antenna; the first receiving circuit 40 and the second receiving circuit 50 each include a receiving path to perform low-noise amplification processing on the low-frequency signal. Thus, the rf system can support dual transmission of low frequency signals and 4 x 4mimo reception functions through the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40, and the second receiver circuit 50. Compared with a radio frequency system which can only support low-frequency signal 2 x 2MIMO reception in the related art, the downlink receiving rate of the low-frequency signal of the radio frequency system of the embodiment can be doubled, the downlink coverage distance is doubled, and the channel capacity and the receiving performance of the radio frequency system can be doubled.

Wherein, the first transceiver circuit 20 is connected to the target antenna group, at least one circuit of the second transceiver circuit 30, the first receiver circuit 40 and the second receiver circuit 50 is configured as a target switching circuit connected to the first transceiver circuit 20, and each target switching circuit is switchably connected to one antenna of the target antenna group through the first transceiver circuit 20. On one hand, the first transceiver circuit 20 may receive low-frequency signals from each branch antenna in the target antenna group, and may select to perform low-noise amplification processing on the low-frequency signals received by any branch antenna in the target antenna group, and select to transmit the low-frequency signals after power amplification processing through the target antenna, so that the first transceiver circuit 20 may select a target antenna with higher antenna efficiency to support the transceiving processing function. On the other hand, the first transceiver circuit 20 may further conduct a radio frequency path between each target switching circuit and another antenna outside the target antenna of the target antenna group, so that each target switching circuit is switchably connected to any antenna in the target antenna group, and thus low-frequency signals received by the other antennas may be selectively transmitted to the target switching circuit, so that the target switching circuit performs low-noise amplification processing on the corresponding low-frequency signals, where when the target switching circuit is the second transceiver circuit 30, the first transceiver circuit 20 may further select to transmit the low-frequency signals after power amplification processing by the second transceiver circuit 30 through the other antenna.

Alternatively, the first transceiver circuitry 20 supports transmission and dominant set reception of low frequency signals, the second transceiver circuitry 30 supports transmission and dominant set MIMO reception of low frequency signals, the first receiver circuitry 40 supports diversity reception of low frequency signals, and the second receiver circuitry 50 supports diversity MIMO reception of low frequency signals. Therefore, the antenna with better antenna efficiency in the target antenna group can be switched to be connected with the first transceiver circuit 20 through the switching of the antenna, so that the transceiver efficiency of the first transceiver circuit 20 used for transmitting and receiving the main set is improved, and the communication performance of the work of the radio frequency system is improved. It is understood that in this embodiment, the main set reception and the diversity reception are also MIMO reception, and the main set reception and the main set MIMO reception are only different in name so as to distinguish the first transceiver circuit 20 and the second transceiver circuit 30 as two different paths in the MIMO reception supporting the main set; diversity reception and diversity MIMO reception are also only named differently in order to distinguish the first receiving circuit 40 and the second receiving circuit 50 as two different paths in MIMO reception supporting diversity.

Optionally, the number of antennas in the target antenna group may be the same as the total number of the first transceiver circuit 20 and the target switch circuit, so that multiple antennas in the target antenna group are respectively connected to the first transceiver circuit 20 and the at least one target switch circuit in a one-to-one correspondence manner. Illustratively, the first receiving circuit 40 is a target switching circuit, the number of antennas in the target antenna group is two, the first transceiver circuit 20 can simultaneously receive the low-frequency signals received by the two antennas and support transceiving processing of the low-frequency signals of any one of the two antennas, the first receiving circuit 40 is switchably connected to the other one of the two antennas through the first transceiver circuit 20, and the second transceiver circuit 30 and the second receiving circuit 50 may be respectively and fixedly connected to the other one of the antennas, or may be configured to be switchably connected to the other one of the antennas. Illustratively, the first receiving circuit 40 and the second receiving circuit 50 are target switching circuits, the number of antennas in a target antenna group is three, the first transceiver circuit 20 can simultaneously receive low-frequency signals received by the three antennas and support transceiving processing of low-frequency signals of any one of the three antennas, the first receiving circuit 40 and the second receiving circuit 50 may each be switchably connected to any one of the three antennas through the first transceiver circuit 20, and the second transceiver circuit 30 may be respectively fixedly connected to another antenna or may be configured to switchably connect to another antenna. Other embodiments are not described.

Each supporting antenna in the target antenna group can support transceiving of a low-frequency signal, and optionally, the low-frequency signal may be one of a 4G LTE low-frequency signal and a 5G NR low-frequency signal. Illustratively, the low-frequency signal includes a radio-frequency signal in any one of N5, N8, N20, N28, B8, B26, B28, and so on.

The radio frequency system provided by the present embodiment includes a radio frequency transceiver 10, and a first transceiver circuit 20, a second transceiver circuit 30, a first receiver circuit 40, and a second receiver circuit 50 respectively connected to the radio frequency transceiver 10, where the first transceiver circuit 20 is connected to a target antenna group, at least one of the second transceiver circuit 30, the first receiver circuit 40, and the second receiver circuit 50 is configured as a target switching circuit connected to the first transceiver circuit 20, each target switching circuit is switchably connected to one antenna in the target antenna group through the first transceiver circuit 20, and the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40, and the second receiver circuit 50 receive processed low frequency signals respectively from different antennas, so that, on one hand, the radio frequency system can support a dual-channel transmission and a 4 × 4mimo receiving function for the low frequency signals through the first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40, and the second receiver circuit 50, thereby doubly improving the channel capacity and the receiving performance of the radio frequency system; on the other hand, by switching the antennas in the target antenna group, the antenna with better antenna efficiency is used as the antenna supporting the transceiving processing function of the first transceiving circuit 20, so as to improve the transceiving efficiency of the first transceiving circuit 20, and further improve the communication performance of the radio frequency system.

In some embodiments, as shown in fig. 2, the first transceiver circuit 20 may be configured with a plurality of antenna ports and at least one connection port (two antenna ports, an 1 and an 2, and one connection port Con1 are illustrated as examples in the figure), each antenna port is connected to each branch antenna in the target antenna group in a one-to-one correspondence manner, and each connection port is connected to a corresponding target switching circuit; the first transceiver circuit 20 includes: a transceiver module 201 and a first switching module 202.

A transceiver module 201, configured to support amplification processing on a received low-frequency signal; a plurality of first ends of the first switching module 202 are respectively connected with a transceiving end and at least one connection port of the transceiving module 201 in a one-to-one correspondence manner, a plurality of second ends of the first switching module 202 are respectively connected with a plurality of antenna ports in a one-to-one correspondence manner, and the first switching module 202 is used for switchably connecting the transceiving module 201 and the target switching circuit to each antenna in the target antenna group.

The first transceiver circuit 20 is configured with a plurality of antenna ports and at least one connection port, each antenna port is connected to each branch antenna in the target antenna group in a one-to-one correspondence manner, and each connection port is connected to a corresponding target switching circuit, so that the first transceiver circuit 20 has a receiving function of receiving a low-frequency signal from each branch antenna of the target antenna group, a transmission function of transmitting a low-frequency signal from at least one branch antenna of the target antenna group to the target switching circuit through the connection port, and a transmitting function of transmitting a low-frequency signal at least through the target antenna of the target antenna group. The number of antenna ports may be equal to the total number of the first transceiver circuit 20 and the target switching circuit, and the number of connection ports may be equal to the circuit number of the target switching circuit, so that each port can be effectively utilized.

The transceiver module 201 is configured to support amplification processing of a received low-frequency signal, and specifically, a transmission path is formed between a transmission input end and a transmission and reception end of the transceiver module 201 to perform power amplification processing on the received low-frequency signal; a receiving path is formed between the receiving output terminal and the transceiving terminal of the transceiving module 201 to perform low noise amplification processing on the received low frequency signal, wherein the transmitting path and the receiving path are configured to be connected to the same antenna. Alternatively, the transceiver module 201 may be a Low-frequency Power Amplifier module (LB L-PA Mid, low Band Power Amplifier Modules) with a built-in Low noise Amplifier.

A plurality of first ends of the first switching module 202 are respectively connected with the transceiving end and at least one connection port of the transceiving module 201 in a one-to-one correspondence manner, and a plurality of second ends of the first switching module 202 are respectively connected with each antenna port in a one-to-one correspondence manner, so that the transceiving end and each connection port can be switchably connected to each antenna in the target antenna group by the first switching module 202, thereby realizing a switching function of switchably connecting the transceiving module 201 and the target switching circuit to each antenna in the target antenna group, and improving the communication performance of the radio frequency system. Alternatively, the first switching module 202 may be a multi-pole multi-throw switch, for example, when the number of target switching circuits is one, the first switching module 202 may be a double-pole double-throw switch.

Optionally, the radio frequency transceiver 10 may determine a target antenna connected to the transceiver module 201 from multiple antennas in the target antenna group, and control the first switching module 202 to connect a radio frequency path between an antenna port and a transceiver end corresponding to the target antenna, so as to implement transmission and main set reception of the target antenna, distribute a low-frequency signal, which is received and transmitted by the first transceiver circuit 20, on an antenna with better antenna efficiency, and improve the communication performance of the radio frequency system; and the receiving function or the transmitting and receiving function of each target switching circuit corresponding to other antennas is realized by switching on the radio frequency channel between the antenna port corresponding to other antennas in the target antenna group and the connecting port. Alternatively, the radio frequency transceiver 10 may configure the target antenna connected to the transceiving module 201 according to network information of the low frequency Signal Received by each antenna of the target antenna group, where the network information may include raw and processed information associated with radio performance metrics of the Received low frequency Signal, such as Signal Strength, received Power, reference Signal Receiving Power (RSRP), received Signal Strength (Received Signal Strength Indicator, RSSI), signal to Noise Ratio (SNR), rank of MIMO channel matrix (Rank), carrier to Interference Noise Ratio (RS-CINR), frame error rate, bit error rate, reference Signal Receiving Quality (RSRQ), and the like.

In some embodiments, the first receiving circuit 40 is configured as a target switching circuit, please continue to refer to fig. 2, the target antenna group includes a first antenna ANT1, a second antenna ANT2; two antenna ports (e.g., ant1 and Ant2 in the figure) are respectively connected to the first antenna Ant1 and the second antenna Ant2 in a one-to-one correspondence manner, and a connection port (e.g., con1 in the figure) is respectively connected to a first end of the first switching module 202 and the second receiving circuit 50; the first switching module 202 is configured to switchably connect the transceiver module 201 and the first receiving circuit 40 to the first antenna ANT1 and the second antenna ANT2.

The transceiver module 201 may be configured to support transmitting and main set receiving, and the first receiving circuit 40 may be configured to support diversity receiving, so that the transceiver module 201 and the first receiving circuit 40 are switchably connected to the first antenna ANT1 and the second antenna ANT2 through the first switching module 202, and an antenna with better antenna efficiency in the two antennas may be switched to be connected to the transceiver module 201, thereby improving the transceiver efficiency of the transceiver module 201 for transmitting and main set receiving, and improving the communication performance of the radio frequency system. Optionally, the first antenna ANT1 may be used as a default target antenna of the transceiver module 201, and if a difference between a second signal strength of the low-frequency signal received by the second antenna ANT2 and a first signal strength of the low-frequency signal received by the first antenna ANT1 is greater than or equal to a preset threshold in a preset time period, the second antenna ANT2 is configured as the target antenna of the transceiver module 201.

In some embodiments, the first receiving circuit 40 and the second receiving circuit 50 may be configured as a target switching circuit, as shown in fig. 3, the target antenna group includes a first antenna ANT1, a second antenna ANT2 and a fourth antenna ANT4; three antenna ports (for example, ant1, ant2, and Ant3 in the figure) are respectively connected to the first antenna Ant1, the second antenna Ant2, and the fourth antenna Ant4 in a one-to-one correspondence manner, and two connection ports (for example, con1, con2 in the figure) are respectively connected to the first receiving circuit 40 and the second receiving circuit 50 in a one-to-one correspondence manner; the first switching module 202 is configured to switchably connect the transceiver module 201, the first receiving circuit 40, and the second receiving circuit 50 to the first antenna ANT1, the second antenna ANT2, and the fourth antenna ANT4.

The transceiver module 201 may be configured to support transmission and dominant set reception, the first receiving circuit 40 may be configured to support diversity reception, and the second receiving circuit 50 may be configured to support diversity MIMO reception, so that the transceiver module 201, the first receiving circuit 40, and the second receiving circuit 50 may be switchably connected to the first antenna ANT1, the second antenna ANT2, and the fourth antenna ANT4 through the first switching module 202, and an antenna with better antenna efficiency among the three antennas may be switched to be connected to the transceiver module 201, thereby improving the transceiver efficiency of the transceiver module 201 that is configured to transmit and receive dominant set, and improving the communication performance of the radio frequency system. Optionally, the first antenna ANT1 may be used as a default target antenna of the transceiver module 201, and if a difference between a second signal strength of the low-frequency signal received by the second antenna ANT2 and a first signal strength of the low-frequency signal received by the first antenna ANT1 is greater than or equal to a preset threshold in a preset time period, the second antenna ANT2 is configured as the target antenna of the transceiver module 201; similarly, if the difference between the third signal strength of the low-frequency signal received by the fourth antenna ANT4 and the first signal strength of the low-frequency signal received by the first antenna ANT1 is greater than or equal to the preset threshold in the preset time period, the fourth antenna ANT4 is configured as the target antenna of the transceiver module 201.

In some embodiments, on the basis that the first receiving circuit 40 is a target switching circuit, as shown in fig. 4, the radio frequency system further includes: two first ends of the second switching module 60 are respectively connected with the second transceiver circuit 30 and the second receiver circuit 50 in a one-to-one correspondence manner, two second ends of the second switching module 60 are respectively connected with the third antenna ANT3 and the fourth antenna ANT4, and the second switching module 60 is configured to switchably connect the second transceiver circuit 30 and the second receiver circuit 50 to the third antenna ANT3 and the fourth antenna ANT4.

The second transceiver circuit 30 may be configured to support dominant set MIMO reception, and the second receiver circuit 50 may be configured to support diversity MIMO reception, so that the second transceiver circuit 30 and the second receiver circuit 50 are switchably connected to the third antenna ANT3 and the fourth antenna ANT4 through the second switching module 60, and an antenna with better antenna efficiency in the two antennas may be switched to be connected to the second transceiver circuit 30, so as to improve the transceiver efficiency of the second transceiver circuit 30 that is dominant set MIMO reception, and improve the communication performance of the radio frequency system. Optionally, the third antenna ANT3 may be used as a default target antenna of the second transceiver circuit 30, and if a difference between a fourth signal strength of the low-frequency signal received by the fourth antenna ANT4 and a third signal strength of the low-frequency signal received by the third antenna ANT3 is greater than or equal to a preset threshold within a preset time period, the fourth antenna ANT4 is configured as the target antenna of the transceiver module 201. Alternatively, the second switching module 60 may be a double pole double throw switch.

In this embodiment, the radio frequency system further includes the second switching module 60 on the basis of including the first switching module 202, so that the radio frequency system can switch the antenna with better antenna efficiency in two antennas to be connected to the first transceiver circuit 20, and switch the antenna with better antenna efficiency in the other two antennas to be connected to the second transceiver circuit 30, so as to improve the transceiving efficiency of the first transceiver circuit 20 receiving as the master set and the second transceiver circuit 30 receiving as the master set MIMO, and further improve the communication performance of the radio frequency system.

IN some embodiments, please continue to refer to fig. 2-4 (fig. 2-4 do not show the first filtering module), the first transceiver circuit 20 may further be configured with an input port and an output port (e.g., IN is the input port and OUT is the output port IN fig. 2-4), the input port is respectively connected to the transmitting input terminals of the rf transceiver 10 and the transceiver module 201, and the output port is respectively connected to the receiving output terminals of the rf transceiver 10 and the transceiver module 201; a transmitting path between the transmitting input terminal and the transmitting and receiving terminal, and a receiving path between the receiving output terminal and the transmitting and receiving terminal are configured to connect the same antenna.

The radio frequency system further comprises: two first ends of the first filtering module are respectively connected with the transmitting input end of the transceiver module 201 and the receiving output end of the transceiver module 201 in a one-to-one correspondence manner, a second end of the first filtering module is connected with the transceiving end of the transceiver module 201, and the first filtering module is used for filtering the low-frequency signal which is received by the input port and amplified by the transceiver module 201 and outputting the low-frequency signal to the transceiving end; the first filtering module is further configured to perform filtering processing on the low-frequency signal received by the transceiving end, and output the low-frequency signal to the output port after the low-frequency signal is amplified by the transceiving module 201.

For the related descriptions of the transmitting input terminal, the receiving output terminal, the input port and the output port, reference is made to the above embodiments, and details are not repeated here.

Two first ends of the first filtering module are respectively connected with a transmitting input end of the transceiver module 201 and a receiving output end of the transceiver module 201 in a one-to-one correspondence manner, a second end of the first filtering module is connected with a transmitting and receiving end of the transceiver module 201, and the first filtering module is used for filtering a low-frequency signal which is received by an input port and amplified by the transceiver module 201 and outputting the low-frequency signal to the transmitting and receiving end; the first filtering module is further configured to perform filtering processing on the low-frequency signal received by the transceiving end, and output the low-frequency signal to the output port after the low-frequency signal is amplified by the transceiving module 201. Therefore, through the first filtering module, on one hand, stray waves of low-frequency signals received by the antenna and stray waves of low-frequency signals output by the filtering radio-frequency transceiver 10 can be filtered out, and interference of the stray waves in the low-frequency signals is reduced; on the other hand, signals of the transmitting path and the receiving path of the transceiver module 201 can be isolated, and mutual interference between the transmitting path and the receiving path can be reduced, so that the transceiving performance of the first transceiver module 201 can be improved, and the communication performance of the radio frequency system can be improved.

Optionally, the first filtering module may include a duplexer or a filter, when the first filtering module includes a duplexer, two first ends of the duplexer correspond to two first ends of the first filtering module, and a second end of the duplexer corresponds to a second end of the first filtering module; when the first filtering module includes filters, the first filtering module may 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 transmit-input-end receive output end in a one-to-one correspondence, and a second end of the switch device is connected to the transmit-receive end.

In some embodiments, the first filtering module 203 may be disposed outside the first transceiver circuit 20, as shown in fig. 5 (the first receiving circuit 40 is taken as an example for illustrating the target switching circuit), and the first transceiver circuit 20 may further be configured with an auxiliary input port, an auxiliary output port, and an auxiliary transceiving port (for example, LB TXOU is the auxiliary input port, LNA AUX is the auxiliary output port, and LB TRX is the auxiliary transceiving port in fig. 5); the transceiver module 201 includes: a transmitting unit 210 and a receiving unit 220.

The input end of the transmitting unit 210 is connected to the input port, the output end of the transmitting unit 210 is connected to the auxiliary input port, and the transmitting unit 210 is configured to perform power amplification processing on the received low-frequency signal; and the input end of the receiving unit 220 is connected to the auxiliary output port, the output end of the receiving unit 220 is connected to the output port, and the receiving unit 220 is used for performing low-noise amplification processing on the received low-frequency signal.

The transmitting unit 210 may include a power amplifier to implement power amplification processing on the low-frequency signal, and the receiving unit 220 may include a low-noise amplifier to implement low-noise amplification processing on the low-frequency signal.

Two first ends of the first filtering module 203 are respectively connected with the auxiliary input port and the auxiliary output port in a one-to-one correspondence manner, and a second end of the first filtering module 203 is connected with the transceiving end through the auxiliary transceiving port. Specifically, the first filtering module 203 is configured to receive the low-frequency signal after power amplification processing by the transmitting unit 210 through the auxiliary input port, to perform filtering processing on the low-frequency signal, and transmit the low-frequency signal after filtering processing to the first switching module 202 through the auxiliary transceiving port; and is further configured to receive a low-frequency signal from the antenna through the auxiliary transceiving port, filter the low-frequency signal, and transmit the filtered low-frequency signal to the receiving unit 220 through the auxiliary output port, so that the receiving unit 220 performs low-noise amplification processing on the filtered low-frequency signal.

The externally-hung first filtering module 203 can filter the low-frequency signals received and transmitted by the first transceiver circuit 20, and improve the isolation of the first filtering module 203 to the low-frequency signals. It should be noted that, in other embodiments, a plurality of first filtering modules 203 may be externally disposed to implement filtering processing on low-frequency signals of a plurality of different frequency bands.

In some embodiments, based on the embodiment of fig. 5, the low frequency signal includes radio frequency signals of a plurality of low frequency bands; as shown in fig. 6, the transmitting unit 210 is configured with a plurality of outputs, and the receiving unit 220 is configured with a plurality of inputs; the transceiver module 201 further includes: a filtering unit 230 and a switching unit 240.

Two first ends of the filtering unit 230 are respectively connected with an output end of the transmitting unit 210 and an input end of the receiving unit 220 in a one-to-one correspondence manner, the filtering unit 230 is configured to perform filtering processing on the received low-frequency signal, and a frequency band of the low-frequency signal that is subjected to filtering processing by the filtering unit 230 is different from a frequency band of the low-frequency signal that is subjected to filtering processing by the first filtering module 203; the switch unit 240, a plurality of first terminals of the switch unit 240 are respectively connected with the second terminal of the filtering unit 230 and the auxiliary transceiving port in a one-to-one correspondence manner, the second terminal of the switch unit 240 is connected with the transceiving terminal, and the switch unit 240 is used for selectively conducting the radio frequency paths between the transmitting unit 210 and the receiving unit 220 and the transceiving terminal respectively.

When the low-frequency signal includes radio-frequency signals of a plurality of low-frequency bands, the transmitting unit 210 may include a power amplifier and a multi-channel selection switch, for example, an input end of the power amplifier is connected to the input port, a first end of the multi-channel selection switch is connected to an output end of the power amplifier, and a plurality of second ends of the multi-channel selection switch are used as a plurality of output ends of the transmitting unit 210, so that the transmitting unit 210 may select to perform power amplification processing on the low-frequency signals of a plurality of different frequency bands; the receiving unit 220 may include a low noise amplifier and a multi-channel selection switch, an output end of the low noise amplifier is connected to the output port, a first end of the multi-channel selection switch is connected to an input end of the low noise amplifier, and a plurality of second ends of the multi-channel selection switch are used as a plurality of input ends of the receiving unit 220, so that the receiving unit 220 may select low-noise amplification processing of low-frequency signals of different frequency bands, the number of the low noise amplifiers LNA1 is reduced, and the area of a main board occupied by devices is reduced.

Both the filtering unit 230 and the first filtering module 203 are configured to perform filtering processing on the received low-frequency signal, and a frequency band of the low-frequency signal that is subjected to filtering processing by the filtering unit 230 is different from a frequency band of the low-frequency signal that is subjected to filtering processing by the first filtering module 203, so that the first transceiver circuit 20 can perform filtering processing on the low-frequency signals of a plurality of different frequency bands through the filtering processing by the filtering unit 230 and the first filtering module 203.

For example, the low frequency signals are signals of four different frequency bands N8, N20, N28, and N71, one first filtering module 203 and three filtering units 230 may be correspondingly disposed to implement filtering processing on the four low frequency signals, and after the filtering processing of the first filtering module 203 and each filtering unit 230, the low frequency signals of N8, N20, N28, and N71 may be correspondingly output to the transmitting unit 210 or the receiving unit 220. Optionally, the filtering unit 230 may include a duplexer, or may include two filters and a switching device, which is specifically referred to the selection of the first filtering module 203 device, and is not further limited herein.

The switch unit 240 is used to selectively connect the rf paths between the transmitting unit 210 and the receiving unit 220 and the transceiving end through the switch unit 240 for the transmitting path and the receiving path of the low-frequency signals, and can reduce the insertion loss of the first transceiving circuit 20, thereby increasing the output power of the low-frequency signals at the transceiving end and the output power at the output port. Alternatively, the switching unit 240 may select a switch in multiple channels.

In some embodiments, the first filtering module 203 may be integrated in the transceiver module 201, as shown in fig. 7, the transceiver module 201 includes: a transmitting unit 210 and a receiving unit 220.

The input end of the transmitting unit 210 is connected to the input port, the output end of the transmitting unit 210 is connected to a first end of the first filtering module 203, and the transmitting unit 210 is configured to perform power amplification processing on the received low-frequency signal; an input end of the receiving unit 220 is connected to another first end of the first filtering module 203, and an output end of the receiving unit 220 is connected to the output port, and is configured to perform low noise amplification processing on the received low frequency signal.

The two first ends of the first filtering module 203 are respectively connected to the transmitting unit 210 and the receiving unit 220 in a one-to-one correspondence manner, the second end of the first filtering module 203 is connected to the transmitting and receiving end to be connected to a first end of the first switching module 202, the first filtering module 203 is configured to filter the low-frequency signal amplified by the transmitting unit 210 and output the low-frequency signal to the transmitting and receiving end, and filter the low-frequency signal received by the transmitting and receiving end and transmit the low-frequency signal to the receiving unit 220, so that the receiving unit 220 filters the low-frequency signal.

The first filtering module 203 is integrated inside the first transceiver circuit 20, so that the area of a mainboard 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 transceiving link can be reduced, the output power of the first transceiving circuit 20 to 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 can be improved.

In some embodiments, based on the embodiment of fig. 7, the low frequency signal includes radio frequency signals of a plurality of low frequency bands; as shown in fig. 8, the transmitting unit 210 is configured with a plurality of outputs, and the receiving unit 220 is configured with a plurality of inputs; the transceiver module 201 further includes: a filtering unit 230 and a switching unit 240.

Two first ends of the filtering unit 230 are respectively connected with an output end of the transmitting unit 210 and an input end of the receiving unit 220 in a one-to-one correspondence manner, the filtering unit 230 is configured to perform filtering processing on the received low-frequency signal, and a frequency band of the low-frequency signal that is subjected to filtering processing by the filtering unit 230 is different from a frequency band of the low-frequency signal that is subjected to filtering processing by the first filtering module 203; a plurality of first terminals of the switch unit 240 are respectively connected to the second terminal of the filtering unit 230 and the second terminal of the first filtering module 203 in a one-to-one correspondence manner, the second terminal of the switch unit 240 is connected to the transceiving terminal, and the switch unit 240 is configured to selectively conduct the radio frequency paths between the transmitting unit 210 and the receiving unit 220 and the transceiving terminal.

The filtering unit 230 and the switching unit 240 may refer to the related descriptions in the above embodiments, and are not described herein again. Through the arrangement of the switch unit 240, the filtering unit 230 and the first filtering module 203, the first transceiver circuit 20 can support a plurality of low-frequency signals of different frequency bands to perform filtering processing.

In the above embodiment, optionally, as shown in fig. 9 and fig. 10, the transceiver module 201 may further include a coupling unit 250, respectively connected to the second end of the switch unit 240 and a first end of the first switching module 202, for coupling the low-frequency signal in the radio frequency path between the switch unit 240 and a first end of the first switching module 202. The first transceiving circuit 20 may be further configured with a low frequency input port LB IN, a high frequency input port HB IN, and a high frequency output port HB OUT, and the transceiving module 201 may further include a 2G low frequency transmitting unit 260 and a 2G high frequency transmitting unit 270. The 2G low frequency transmitting unit 260 and the 2G high frequency transmitting unit 270 may respectively perform amplification processing on the 2G low frequency signal and the 2G high frequency signal.

In some embodiments, as shown in fig. 11 and 12, the second transceiver circuit 30 includes: a power amplification module 301, a first low noise amplification module 302 and a second filtering module 303.

The input end of the power amplification module 301 is connected to the radio frequency transceiver 10, and the power amplification module 301 is configured to perform power amplification processing on the received low-frequency signal; the output end of the first low-noise amplification module 302 is connected with the radio frequency transceiver 10, and the first low-noise amplification module 302 is configured to perform low-noise amplification processing on the received low-frequency signal; two first ends of the second filtering module 303 are respectively connected with the output end of the power amplifying module 301 and the input end of the first low-noise amplifying module 302 in a one-to-one correspondence manner, and a second end of the second filtering module 303 is connected with an antenna and is used for filtering the received low-frequency signal.

The power amplification module 301 may include a power amplifier to perform power amplification processing on the received low-frequency signal; the first low-noise amplification module 302 may include a low-noise amplifier to perform low-noise amplification processing on the received low-frequency signal; the second filtering module 303 may include a duplexer or a filter, when the second filtering module 303 includes a duplexer, two first ends of the duplexer correspond to two first ends of the second filtering module 303, and a second end of the duplexer corresponds to a second end of the second filtering module 303; when the second filtering module 303 includes filters, the second filtering module 303 may 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 transmitting input end and the receiving output end in a one-to-one correspondence, and a second end of the switch device is connected to the transceiving end. Optionally, as shown in fig. 11 and 12, the second transceiver circuit 30 may further include: a coupling module 304 for low frequency signals in the radio frequency path between the second filtering module 303 and the antenna. The coupling module may include a coupler and the like, and is not further limited herein.

Optionally, the first low noise amplifier module 302 in the second transceiver circuit 30 may be integrated in the first transceiver circuit 20 (the integration manner may refer to the specific embodiment described later), so that the first transceiver circuit 20 can simultaneously support the functions of transmitting and receiving low frequency signals and two-way signals, reduce the port mismatch, improve the transceiving performance and reduce the occupied area of the radio frequency front end module, and also reduce the number of independent external low noise amplifiers, and reduce the cost.

In some embodiments, the first receiving circuit 40 may be a radio frequency Low noise amplifier module (LFEM), which is referred to as an LFEM device for short, and a Low noise amplifier, a radio frequency switch, a duplexer or a filter, etc. may be integrated inside the LFEM device, and may be used to support receiving processing of a Low frequency signal. By arranging the LFEM device, the integration level of the radio frequency system can be improved, the occupied space of the radio frequency system is reduced, and the miniaturization design of the radio frequency system is facilitated.

In some embodiments, with continued reference to fig. 11 and 12, the second receiving circuit 50 may include a second low noise amplification module 501 and a third filtering module 502, an input end of the third filtering module 502 is connected to the antenna, an output end of the third filtering module 502 is connected to an input end of the second low noise amplification module 501, and an output end of the second low noise amplification module 501 is connected to the radio frequency transceiver 10. Optionally, the second low noise amplification module 501 may include a low noise amplifier, and the third filtering module 502 may include a filter, which is not further limited herein.

Fig. 13, 14, and 15 are specific circuit diagrams of radio frequency systems according to different embodiments (taking the first filtering module 203 disposed outside the transceiver module 201 as an example, and fig. 15 also taking the first low noise amplifying module 302 integrated in the first transceiver circuit 20 as an example), fig. 16 and 17 are specific circuit diagrams of radio frequency systems according to two other embodiments (taking the first filtering module 203 integrated inside the transceiver module 201 as an example), as shown in fig. 13 to 17, the transmitting unit 210 may include a power amplifier LB PA1 and a multi-channel selection switch SP8T1, so that the transmitting unit 210 may select to perform power amplification processing on low frequency signals of multiple different frequency bands. The receiving unit 220 may include a low noise amplifier LNA1 and a multi-channel selection switch SP4T1, so that the receiving unit 220 may select to perform low noise amplification processing on low frequency signals of different frequency bands, the number of the low noise amplifiers LNA1 is reduced, and the area of a main board occupied by devices is reduced; the receiving unit 220 may further include a double-pole double-throw switch DPDT1 to selectively turn on paths between two output ports (output port LNA OUT1 and output port LNA OUT 2) and the plurality of low noise amplifiers LNA1, so as to implement output paths of low frequency signals of different frequency bands. The switching unit 240 may be a multi-channel selection switch SP8T2. The first switching module 202 and the second switching module 60 may both be double pole double throw switches; the first filtering module 203 and the second filtering module 303 may both be duplexers, and the third filtering module 502 may be a filter; the first receiving circuit 40 is an LFEM device integrating a plurality of low noise amplifiers, rf switches, and filters.

For convenience of explanation, the process of two-way transmission and four-way reception of the low-frequency signal in this embodiment is explained based on the radio frequency system shown in fig. 13:

a first transmission path: the radio frequency transceiver 10 outputs an N28 signal to the power amplifier LB PA1, performs power amplification through the power amplifier LB PA1, and then transmits the signal to the duplexer DU1 through the auxiliary input port, and the duplexer DU1 filters an out-of-band signal, and then transmits the signal to the multi-channel selection switch SP8T2, the coupler CO1, and the double-pole double-throw switch DPDT2 through the auxiliary transceiving port to one of the first antenna ANT1 and the second antenna ANT2.

A second transmission path: the rf transceiver 10 outputs an N28 signal to the power amplifier LB PA2, performs signal amplification through the power amplifier LB PA2, then filters an out-of-band signal through the duplexer DU3, and then transmits the out-of-band signal to the third antenna ANT3 through the coupler CO 2.

A first reception path: one antenna of the first antenna ANT1 and the second antenna ANT2 receives an N28 signal from the space, the N28 signal enters the double-pole double-throw switch DPDT2, is transmitted to the duplexer DU1 through the multi-channel selection switch SP8T2 and the auxiliary transceiving end for filtering, is output to the low noise amplifier LNA2 through the auxiliary receiving end, performs low noise amplification processing on the N28 signal, and is output to the radio frequency transceiver 10 through the output port, so as to implement main set reception (PRX) on the N28 signal.

A second reception path: the other antenna of the first antenna ANT1 and the second antenna ANT2 receives an N28 signal from the space, the N28 signal enters the LFEM device, the out-of-band signal is filtered by the multichannel selection switch SP8T3 and the filter F3, and then the out-of-band signal is output to the double-pole double-throw switch DPDT3 through the low noise amplifier LNA3, and finally output to the radio frequency transceiver 10, so as to implement Diversity Reception (DRX) on the N28 signal.

A third reception path: the third antenna ANT3 receives the N28 signal from the space, the N28 signal enters the duplexer DU3 through the coupler CO2, the out-of-band signal is filtered through the duplexer DU3, and then the out-of-band signal is output to the low noise amplifier LNA9, the N28 signal is subjected to low noise amplification processing, and finally the N28 signal is output to the radio frequency transceiver 10, so as to implement primary set MIMO reception (PRX MIMO) of the N28 signal.

A fourth reception path: the fourth antenna ANT4 receives an N28 signal from the space, the N28 signal filters an out-of-band signal through the filter F10, and then outputs the out-of-band signal to the low noise amplifier LNA10, performs low noise amplification processing on the N28 signal, and finally outputs the out-of-band signal to the radio frequency transceiver 10, so as to implement diversity MIMO reception (DRX MIMO) on the N28 signal.

The embodiment of the application also provides communication equipment, and the communication equipment is provided with the radio frequency system in any embodiment. By arranging the radio frequency system on the communication equipment, the two-way transmission and 4X 4MIMO receiving of low-frequency signals can be realized, the throughput of the low-frequency signals can be improved by times, the downloading rate is improved to improve the user experience, and meanwhile, when the communication equipment is positioned in weak signal environments such as a cell edge, a deep building, an elevator and the like, the communication equipment is received by 4X 4MIMO, so that higher diversity gain and larger coverage distance are realized; moreover, the first transceiver circuit 20 and the target switching circuit are switchably connected to each antenna of the target antenna group, and the antenna with better antenna efficiency can be switched to be connected with the first transceiver circuit 20 by switching the antenna, so that the transceiver efficiency of the first transceiver circuit 20 is improved, and the communication performance of the radio frequency system is improved; in addition, the device has high integration level, the area of a substrate occupied by each device in a radio frequency system is reduced, meanwhile, the layout and wiring can be simplified, and the cost is saved.

As shown in fig. 18, further, the above communication device is a mobile phone 11 for example, and specifically, as shown in fig. 18, 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 of the above embodiment, and an input/output (I/O) subsystem 26. These components optionally communicate via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that the handset 11 shown in fig. 18 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. 18 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, etc.

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

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

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

Any reference to memory, storage, database, or other medium used herein may include non-volatile and/or volatile memory. Suitable non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RM), which acts as external cache memory. By way of illustration and not limitation, RMs are available in a variety of forms, such as Static RM (SRM), dynamic RM (DRM), synchronous DRM (SDRM), double data rate SDRM (DDR SDRM), enhanced SDRM (ESDRM), synchronous link (Synchlink) DRM (SLDRM), memory bus (Rmbus) direct RM (RDRM), direct memory bus dynamic RM (DRDRM), and memory bus dynamic RM (RDRM).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

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

Claims

1. A radio frequency system, comprising: the radio frequency transceiver comprises a radio frequency transceiver, and a first transceiving circuit, a second transceiving circuit, a first receiving circuit and a second receiving circuit which are respectively connected with the radio frequency transceiver; the first transceiver circuit and the second transceiver circuit are respectively used for supporting the transmission and receiving processing of low-frequency signals; the first receiving circuit and the second receiving circuit are respectively used for supporting the receiving processing of the low-frequency signal; wherein:

2. The rf system according to claim 1, wherein the first transceiver circuit is configured with a plurality of antenna ports and at least one connection port, each of the antenna ports is connected to each of the branch antennas in the target antenna group in a one-to-one correspondence, and each of the connection ports is connected to the corresponding target switching circuit; the first transceiving circuit includes:

the receiving and transmitting module is used for supporting the amplification processing of the received low-frequency signal;

a plurality of first ends of the first switching module are respectively connected with the transceiving end of the transceiving module and the at least one connection port in a one-to-one correspondence manner, a plurality of second ends of the first switching module are respectively connected with the plurality of antenna ports in a one-to-one correspondence manner, and the first switching module is configured to switchably connect the transceiving module and the target switching circuit to each antenna in the target antenna group.

3. The radio frequency system of claim 2, wherein the first receiving circuit is configured as the target switching circuit, the target antenna group comprising a first antenna, a second antenna; the two antenna ports are respectively connected with the first antenna and the second antenna in a one-to-one correspondence manner, and one connecting port is respectively connected with a first end of the first switching module and the second receiving circuit;

wherein the first switching module is configured to switchably connect the transceiver module and the first receiving circuit to the first antenna and the second antenna.

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

and two first ends of the second switching module are respectively connected with the second transceiver circuit and the second receiving circuit in a one-to-one correspondence manner, two second ends of the second switching module are respectively connected with a third antenna and a fourth antenna, and the second switching module is used for switchably connecting the second transceiver circuit and the second receiving circuit to the third antenna and the fourth antenna.

5. The radio frequency system of claim 2, wherein the first receiving circuit and the second receiving circuit are configured as the target switching circuit, and wherein the target antenna group comprises a first antenna, a second antenna, and a fourth antenna; the three antenna ports are respectively connected with the first antenna, the second antenna and the fourth antenna in a one-to-one correspondence manner, and the two connecting ports are respectively connected with the first receiving circuit and the second receiving circuit in a one-to-one correspondence manner;

wherein the first switching module is configured to switchably connect the transceiver module, the first receiving circuit, and the second receiving circuit to the first antenna, the second antenna, and the fourth antenna.

6. The RF system according to any one of claims 2-5, wherein the first transceiver circuit is further configured with an input port and an output port, the input port is connected to the transmission input terminals of the RF transceiver and the transceiver module, respectively, and the output port is connected to the reception output terminals of the RF transceiver and the transceiver module, respectively; a transmitting path between the transmitting input terminal and the transceiving terminal, and a receiving path between the receiving output terminal and the transceiving terminal are configured to be connected to the same antenna; the radio frequency system further comprises:

the two first ends of the first filtering module are respectively connected with the transmitting input end of the transceiver module and the receiving output end of the transceiver module in a one-to-one correspondence manner, the second end of the first filtering module is connected with the transceiving end of the transceiver module, and the first filtering module is used for filtering the low-frequency signal which is received by the input port and amplified by the transceiver module and outputting the low-frequency signal to the transceiving end; the first filtering module is further configured to perform filtering processing on the low-frequency signal received by the transceiving end, and output the low-frequency signal to the output port after the low-frequency signal is amplified by the transceiving module.

7. The radio frequency system according to claim 6, wherein the first transceiving circuitry is further configured with an auxiliary input port, an auxiliary output port, an auxiliary transceiving port; the transceiver module includes:

the input end of the transmitting unit is connected with the input port, the output end of the transmitting unit is connected with the auxiliary input port, and the transmitting unit is used for performing power amplification processing on the received low-frequency signal;

the input end of the receiving unit is connected with the auxiliary output port, the output end of the receiving unit is connected with the output port, and the receiving unit is used for performing low-noise amplification processing on the received low-frequency signal;

the two first ends of the first filtering module are respectively connected with the auxiliary input port and the auxiliary output port in a one-to-one correspondence manner, and the second end of the first filtering module is connected with the transceiving end through the auxiliary transceiving port.

8. The radio frequency system according to claim 7, wherein the low frequency signal comprises a plurality of low frequency band radio frequency signals; the transmitting unit is configured with a plurality of outputs, the receiving unit is configured with a plurality of inputs; the transceiver module further comprises:

the two first ends of the filtering unit are respectively connected with one output end of the transmitting unit and one input end of the receiving unit in a one-to-one correspondence manner, the filtering unit is used for filtering the received low-frequency signals, and the frequency band of the low-frequency signals subjected to filtering processing by the filtering unit is different from the frequency band of the low-frequency signals subjected to filtering processing by the first filtering module;

and a plurality of first ends of the switch unit are respectively connected with the second end of the filtering unit and the auxiliary transceiving port in a one-to-one correspondence manner, the second end of the switch unit is connected with the transceiving end, and the switch unit is used for selectively conducting radio frequency paths between the transmitting unit and the transceiving end and between the receiving unit and the transceiving end.

9. The radio frequency system according to claim 6, wherein the first filtering module is integrated in the transceiver module, the transceiver module comprising:

the input end of the transmitting unit is connected with the input port, the output end of the transmitting unit is connected with a first end of the first filtering module, and the transmitting unit is used for performing power amplification processing on the received low-frequency signal;

and the input end of the receiving unit is connected with the other first end of the first filtering module, the output end of the receiving unit is connected with the output port, and the receiving unit is used for carrying out low-noise amplification processing on the received low-frequency signal.

10. The radio frequency system according to claim 9, wherein the low frequency signal comprises a plurality of low frequency band radio frequency signals; the transmitting unit is configured with a plurality of outputs, the receiving unit is configured with a plurality of inputs; the transceiver module further comprises:

and a plurality of first ends of the switch unit are respectively connected with the second end of the filter unit and the second end of the first filter module in a one-to-one correspondence manner, the second end of the switch unit is connected with the transceiving end, and the switch unit is used for selectively conducting radio frequency paths between the transmitting unit and the receiving unit and between the transmitting unit and the transceiving end.

11. The radio frequency system according to any of claims 2 to 5, wherein the second transceiver circuit comprises:

the input end of the power amplification module is connected with the radio frequency transceiver, and the power amplification module is used for performing power amplification processing on the received low-frequency signal;

the output end of the first low-noise amplification module is connected with the radio frequency transceiver, and the first low-noise amplification module is used for performing low-noise amplification processing on the received low-frequency signal;

and two first ends of the second filtering module are respectively connected with the output end of the power amplification module and the input end of the first low-noise amplification module in a one-to-one correspondence manner, and a second end of the second filtering module is connected with the antenna and used for filtering the received low-frequency signal.

12. A communication device, comprising:

the radio frequency system of any one of claims 1-11.