CN115102559B

CN115102559B - Radio frequency PA Mid device, radio frequency system and communication equipment

Info

Publication number: CN115102559B
Application number: CN202210652380.1A
Authority: CN
Inventors: 王国龙
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2023-11-10
Anticipated expiration: 2042-06-07
Also published as: WO2023236530A1; CN115102559A

Abstract

The embodiment of the application relates to a radio frequency (PA) Mid device, a radio frequency system and communication equipment, wherein the PA Mid device is configured with a first input port and a second input port for connecting a radio frequency transceiver and a first medium-high frequency antenna port for connecting an antenna, and the PA Mid device comprises: the first transmitting module is connected with the first input port and used for supporting the transmitting processing of the medium-high frequency signals of the first system from the first input port; the second transmitting module is connected with the second input port and is used for supporting the transmitting processing of the high-frequency signals of a second system from the second input port, and the second system is different from the first system; and a part of first ends of the first switch modules are respectively connected with the first transmitting module and the second transmitting module, one second end of the first switch module is connected with the first medium-high frequency antenna port, and the first switch module is used for selectively conducting a signal transmission channel between any first end and the second end connected with the first medium-high frequency antenna port.

Description

Radio frequency PA Mid device, radio frequency system and communication equipment

Technical Field

The embodiment of the application relates to the technical field of radio frequency, in particular to a radio frequency PA Mid device, a radio frequency system and communication equipment.

Background

With the development and progress of technology, mobile communication technology is gradually beginning to be applied to communication devices, such as mobile phones and the like. In order to cope with the increasing demands of various network systems and simultaneously solve the problem of the shortage of the layout of the PCB, the high integration and miniaturization of the devices are just about to be a trend. Accordingly, it is desirable to provide a radio frequency device with high integration.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a radio frequency PA Mid device, a radio frequency system, and a communication device that can improve the degree of integration.

A radio frequency PA Mid device configured with a first input port and a second input port for connecting a radio frequency transceiver, and a first Mid-high frequency antenna port for connecting an antenna, the radio frequency PA Mid device comprising:

the first transmitting module is connected with the first input port and used for supporting the transmitting processing of the medium-high frequency signals of the first system from the first input port;

the second transmitting module is connected with the second input port and is used for supporting the transmitting processing of the high-frequency signals of a second system from the second input port, and the second system is different from the first system;

The first switch module comprises a plurality of first ends and a plurality of second ends, part of the first ends of the first switch module are respectively connected with the first transmitting module and the second transmitting module, one second end of the first switch module is connected with the first medium-high frequency antenna port, and the first switch module is used for selecting and conducting a signal transmission channel between any first end and the second end connected with the first medium-high frequency antenna port.

A radio frequency system comprising: a radio frequency transceiver and a radio frequency PA Mid device as described above; wherein,

the second input port, the first input port and the first output port of the radio frequency PA Mid device are respectively connected with the radio frequency transceiver, and the first middle-high frequency antenna port is connected with the first antenna.

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

The radio frequency PA Mid device comprises two middle-high frequency transmitting modules so as to support the transmitting processing of middle-high frequency signals of different systems. Because the signals processed by the first transmitting module and the second transmitting module are medium-high frequency signals, the integrated setting has better compatibility. Moreover, because the middle-high frequency signals of different systems are not required to be transmitted at the same time, the middle-high frequency signals of different systems can be transmitted through the same first middle-high frequency antenna port in a time sharing way by arranging the first switch module, so that the number of the antenna ports required to be arranged is reduced, and the integration level of the radio frequency PA Mid device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a rf PA Mid device according to an embodiment;

FIG. 2 is a second schematic diagram of an embodiment of a RF PA Mid device;

FIG. 3 is a third schematic diagram of an embodiment of a RF PA Mid device;

FIG. 4 is a schematic diagram of a RF PA Mid device according to an embodiment;

FIG. 5 is a schematic diagram of a RF PA Mid device according to an embodiment;

FIG. 6 is a schematic diagram of a RF PA Mid device according to an embodiment;

fig. 7 is a schematic diagram of a rf PA Mid device according to an embodiment;

fig. 8 is a schematic diagram of a rf PA Mid device according to an embodiment;

FIG. 9 is a schematic diagram of an RF system according to an embodiment;

FIG. 10 is a second schematic diagram of an RF system according to an embodiment;

Fig. 11 is a schematic diagram of a structure of a rf PA Mid device according to an embodiment;

fig. 12 is a schematic diagram of a rf PA Mid device according to one embodiment;

FIG. 13 is a third schematic diagram of an RF system according to an embodiment;

fig. 14 is a schematic diagram of an embodiment of a rf PA Mid device;

FIG. 15 is a fourth schematic diagram of an RF system according to an embodiment;

fig. 16 is a schematic diagram of a rf PA Mid device according to one embodiment;

FIG. 17 is a fifth schematic diagram of an RF system according to an embodiment;

fig. 18 is a schematic diagram of a rf PA Mid device according to an embodiment;

FIG. 19 is a schematic diagram of a RF system according to an embodiment;

FIG. 20 is a schematic diagram of a RF system according to an embodiment;

fig. 21 is a schematic structural diagram of an rf system according to an embodiment.

Description of element numbers:

radio frequency PA Mid device: 10; a radio frequency transceiver: 20, a step of; radio frequency LFEM device: 30; a first transmitting module: 110; and a second transmitting module: 120; and a third transmitting module: 130; a fourth transmitting module: 140; a first switch module: 210; and a second switch module: 220; and a third switch module: 230, a step of; and a fourth switch module: 240, a step of; a fifth switch module: 250; a sixth switch module: 260; a first receiving module: 310; and a second receiving module: 320. And a third receiving module: 330; a fourth receiving module: 340 (340); third medium-high frequency filter: 431; fourth medium-high frequency filter: 441; third low frequency filter: 531; fourth low frequency filter: 541; a first combiner: 610; a second combiner: 620; and a third combiner: 630. Fourth combiner: 640, a base; a first coupling module: 710. And a second coupling module: 720.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that the terms first, second, etc. as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first input port may be referred to as a second input port, and similarly, a second input port may be referred to as a first input port, without departing from the scope of the application. The first input port and the second input port are both input ports, but they are not the same input port.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. In the description of the present application, the meaning of "several" means at least one, such as one, two, etc., unless specifically defined otherwise.

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

Fig. 1 is one of schematic structural diagrams of a radio frequency PA Mid device 10 according to an embodiment, and referring to fig. 1, in one embodiment, the radio frequency PA Mid device 10 is configured with a first input port and a second input port for connection to a radio frequency transceiver, and a first Mid-high frequency antenna port ANT3 for connection to an antenna. The first input port and the second input port are respectively used for transmitting signals of different systems, so that the radio frequency PA Mid device 10 can implement transmission processing of signals of a first system and signals of a second system, and the second system is different from the first system. The radio frequency signals may include low, medium, and high frequency signals of 2G, 4G, and 5G modes. The antenna may be formed using any suitable type of antenna, and may include, for example, an antenna having 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, and a dipole antenna. Wherein different types of antennas may be used for different frequency bands and combinations of frequency bands.

In the embodiments of the present application, a case is described in which a first input port is used for transmitting a medium-high frequency signal of a 4G system and a 5G system, and a second input port is used for transmitting a high frequency signal of a 2G system. Accordingly, the first input port may be referred to as a 4G RFIN and the second input port may be referred to as a 2G HB IN. It should be noted that, although some ports are named in the 4G format in fig. 1, the ports may be used to transmit signals in the 5G format. Further, in order to improve the processing performance of the rf PA Mid device 10 on the medium-high frequency signal of the 4G system signal, the rf PA Mid device 10 in the embodiment of the present application processes the intermediate frequency signal and the high frequency signal of the 4G system respectively. The medium-high frequency signals may include intermediate frequency signals and high frequency signals among the 4G LTE signal, the 5G NR signal. The intermediate frequency signal may include radio frequency signals of at least one intermediate frequency band, for example, radio frequency signals of bands including B1, B3, B66, B25, B34, B39, and the like. The high frequency signals may include radio frequency signals of at least one high frequency band, such as radio frequency signals of bands including B7, B40, B41, etc. Accordingly, the radio frequency PA Mid device 10 may be configured with two first input ports, referred to as 4G MB RFIN and 4G HB RFIN, respectively, to transmit signals of different frequency ranges, respectively.

The rf PA Mid device 10 includes a first transmitting module 110, a second transmitting module 120, and a first switching module 210. The first transmitting module 110 is connected to the first input ports 4G MB RFIN and 4G HB RFIN, and is configured to support transmission processing of a medium-high frequency signal of a first system from the first input ports 4G MB RFIN and 4G HB RFIN. The second transmitting module 120 is connected to the second input port 2G HB IN, and is configured to support a transmission process of a high-frequency signal of a second system from the second input port 2G HB IN. Each transmitting module includes at least one Power Amplifier (PA), and may further include at least one of a filter, a combiner, a duplexer, a switch, and the like, to support more complex transmitting processing functions. The first switch module 210 includes a plurality of first ends and a plurality of second ends, a portion of the first ends of the first switch module 210 are respectively connected with the first transmitting module 110 and the second transmitting module 120, one second end of the first switch module 210 is connected with the first mid-high frequency antenna port ANT3, and the first switch module 210 is used for selectively conducting a signal transmission path between any first end and the second end connected with the first mid-high frequency antenna port ANT 3.

Further, the first transmitting module 110 may output the signals of different frequency bands after the transmission processing to the first switch module 210 through different ports, so as to transmit the medium-high frequency signals of different frequency bands. Therefore, a plurality of signal transmission paths may be formed between the first transmitting module 110 and the first switching module 210, and each signal transmission path is used for transmitting signals in different frequency bands, so as to expand the frequency band range that the rf PA Mid device 10 can process. In addition, on each signal transmission path, a filter of a corresponding frequency band can be respectively arranged, so that the signal transmitted by the signal transmission path is subjected to filtering processing, and the signal transmission quality is improved. For example, in the embodiment shown in fig. 1, two signal transmission paths are provided between the first transmitting module 110 and the first switching module 210, and a corresponding second middle-high frequency filter may be disposed on each signal transmission path, and only the signals in the frequency band required to be transmitted by the signal transmission path are allowed to pass through, and other signals outside the frequency band required to be transmitted are isolated, so that filtering processing is performed on the signals in different frequency bands respectively.

In this embodiment, the radio frequency PAMid device 10 includes two middle-high frequency transmitting modules to support transmitting processing of middle-high frequency signals of different systems. Because the signals processed by the first transmitting module 110 and the second transmitting module 120 are medium-high frequency signals, the integrated configuration has better compatibility. Moreover, since the Mid-high frequency signals of different systems do not need to be transmitted at the same time, by setting the first switch module 210, the Mid-high frequency signals of different systems can be transmitted through the same first Mid-high frequency antenna port ANT3 in a time-sharing manner, so that the number of the antenna ports to be set is reduced, and the integration level of the radio frequency PA Mid device 10 is improved.

Fig. 2 is a second schematic structural diagram of the rf PA Mid device 10 according to an embodiment, referring to fig. 2, in one embodiment, the rf PA Mid device 10 is further configured with a first output port LNA OUT for connecting to an rf transceiver, and the first output port LNA OUT is used for transmitting the received and processed Mid-high frequency signal to the rf transceiver. The rf PA Mid device 10 further includes a first receiving module 310. The first receiving module 310 is connected to the first output port LNA OUT, and is configured to support receiving and processing of the medium-high frequency signal of the first system from the first medium-high frequency antenna port ANT3, and transmit the processed signal to the first output port LNA OUT. Wherein, a portion of the first ends of the first switch modules 210 are connected to the first receiving module 310, and the first switch modules 210 are further configured to selectively transmit the medium-high frequency signals of the first standard from the first medium-high frequency antenna port ANT3 to the first receiving module 310. That is, when transmitting signals, the first switch module 210 may selectively switch on the first transmitting module 110 or the second transmitting module 120 to the first mid-high frequency antenna port ANT3 to transmit mid-high frequency signals; when receiving signals, the first switch module 210 may selectively switch on the first mid-high frequency antenna port ANT3 to the first receiving module 310 to receive mid-high frequency signals.

In this embodiment, the first receiving module 310 is integrated to receive the intermediate-high frequency signal of the first system, so that the intermediate-high frequency signal of the first system is received without setting an external receiving module, thereby reducing the number of external wires and improving the integration level of the radio frequency system. It is understood that, similar to the first transmitting module 110, the first receiving module 310 may also be provided with a plurality of ports for connecting with the first switch module 210, so as to form a plurality of signal transmission paths between the first receiving module 310 and the first switch module 210, so as to transmit signals of different frequency bands through different signal transmission paths, respectively. Furthermore, a filter may be disposed on the signal transmission path between the first receiving module 310 and the first switching module 210 to improve the signal-to-noise ratio of the transmitted mid-high frequency signal.

Fig. 3 is a third schematic structural diagram of the rf PA Mid device 10 according to an embodiment, and referring to fig. 3, in one embodiment, the rf PA Mid device 10 is further configured with a third input port 4G LB RFIN and a fourth input port 2G LB RFIN for connecting to the rf transceiver, and a first low frequency antenna port ANT1 for connecting to an antenna. The low-frequency signal of the first system may include any one of a radio-frequency signal of a low-frequency band of a 4G LTE signal and a 5G NR signal, and may, for example, include radio-frequency signals of a plurality of frequency bands of B8, B12, B20, B26, B28A, and the like.

The rf PA Mid device 10 further includes a third transmit module 130, a fourth transmit module 140, and a second switch module 220. The third transmitting module 130 is connected to the third input port 4G LB RFIN, and is configured to support a transmission process of a low frequency signal of a first system from the third input port 4G LB RFIN. The fourth transmitting module 140 is connected to the fourth input port 2G LB RFIN, and is configured to support transmission processing of a low frequency signal of a second system from the fourth input port 2G LB RFIN. The second switch module 220 includes a plurality of first ends and a plurality of second ends, part of the first ends of the second switch module 220 are respectively connected with the fourth transmitting module 140 and the third transmitting module 130 in a one-to-one correspondence manner, one second end of the second switch module 220 is connected with the first low-frequency antenna port ANT1, and the second switch module 220 is used for selectively conducting a signal transmission path between any one of the first ends and the second end connected with the first low-frequency antenna port ANT 1. That is, the second switch module 220 may selectively turn on the third transmitting module 130 to the first low frequency antenna port ANT1 to transmit the low frequency signal of the first system, or may selectively turn on the fourth transmitting module 140 to the first low frequency antenna port ANT1 to transmit the low frequency signal of the second system.

In this embodiment, the rf PA Mid device 10 further includes two low-frequency transmitting modules to support transmitting processing of low-frequency signals of different systems, so that the rf PA Mid device 10 can respectively transmit and receive signals of low frequency and medium-high frequency. In addition, by setting the second switch module 220, low-frequency signals with different systems can be transmitted in a time-sharing manner through the same first low-frequency antenna port ANT1, so that the number of antenna ports required to be set is reduced, and the integration level of the radio-frequency PA Mid device 10 is improved.

Fig. 4 is a schematic structural diagram of the rf PA Mid device 10 according to an embodiment, referring to fig. 4, in one embodiment, the rf PA Mid device 10 is further configured with a second output port LNA OUT for connecting to the rf transceiver, and the second output port LNA OUT is used for transmitting the low frequency signal after the receiving process to the rf transceiver. The rf PA Mid device 10 further includes a second receiving module 320. The second receiving module 320 is connected to the second output port LNA OUT, and is configured to support receiving processing of the low frequency signal of the first system from the first low frequency antenna port ANT1, and transmit the processed signal to the second output port LNA OUT. Wherein, a portion of the first ends of the second switch modules 220 are connected to the second receiving module 320, and the second switch modules 220 are further configured to selectively transmit the low-frequency signal of the first system from the first low-frequency antenna port ANT1 to the second receiving module 320. That is, during signal transmission, the second switch module 220 may selectively turn on the third transmitting module 130 or the fourth transmitting module 140 to the first low frequency antenna port ANT1 to implement transmission of the low frequency signal; when receiving signals, the second switch module 220 may selectively turn on the first low frequency antenna port ANT1 to the second receiving module 320 to receive low frequency signals.

Fig. 5 is a fifth schematic structural diagram of the rf PA Mid device 10 according to an embodiment, and referring to fig. 5, in one embodiment, the rf PA Mid device 10 is further configured with a first transceiver port TRX for connecting to an rf LFEM device. Wherein a first end of the first switch module 210 is connected to the first transceiver port TRX. It will be appreciated that after the rf PA Mid device 10 is packaged, the internal signal transmission path is fixed, and thus a more complex signal transceiving function cannot be realized. However, in this embodiment, by setting the first transmit-receive port TRX, the medium-high frequency signal received by the first medium-high frequency antenna port ANT3 may be transmitted to the radio frequency LFEM device for receiving processing, so as to expand the transmit-receive function of the radio frequency system, so that main diversity receiving and MIMO receiving may be performed on radio frequency signals with more frequency bands. For example, if the rf PA Mid device 10 includes only one receiving path of the B41 band connected to the first low-frequency antenna port ANT1, the first Mid-high-frequency antenna port ANT3 may be controlled to also receive the B41 band signal at the same time, and output the received signal to the rf LFEM device through the first transceiver port TRX, so as to implement dual-path reception of the B41 band signal.

Fig. 6 is a sixth schematic structural diagram of a rf PA Mid device 10 according to an embodiment, which refines the specific structure inside each of the transmitting module and the receiving module. Referring to fig. 6, the first transmitting module 110 includes an intermediate frequency signal transmitting unit connected to the first input port 4G MB RFIN and a high frequency signal transmitting unit connected to the first input port 4G HB RFIN. The intermediate frequency signal transmitting unit comprises at least one intermediate frequency 4G power amplifier and a radio frequency switch connected with the intermediate frequency 4G power amplifier so as to output signals of different frequency bands through different signal transmission paths. The high-frequency signal transmitting unit comprises a plurality of medium-high frequency 4G power amplifiers and radio frequency switches connected with the medium-high frequency 4G power amplifiers so as to transmit signals in different frequency bands to the different medium-high frequency 4G power amplifiers and output the signals through different signal transmission paths. The second transmit module 120 includes at least one high frequency 2G power amplifier.

The first receiving module 310 includes a plurality of medium-high frequency 4G low noise amplifiers and a radio frequency switch connected to the medium-high frequency 4G low noise amplifiers to receive signals of different frequency bands through different signal transmission paths. The first switch module 210 may be an SPnT switch, where one first end of the SPnT switch is connected to the second transmitting module 120, another first end is connected to the first receiving port TRX, and the remaining first ends are connected to the first transmitting module 110 and the first receiving module 310. Furthermore, the first transmitting module 110 is further provided with a plurality of second mid-high frequency filters on the signal transmission path. Further, the second mid-high frequency filter of the partial frequency band may be integrally provided, for example, as a multiplexer of the B25/B66 frequency band as shown in fig. 6. The first receiving module 310 is also provided with a plurality of second intermediate-high frequency filters on the signal transmission path. Wherein the second intermediate-high frequency filter on the transmitting path and the receiving path of the same frequency band signal may be integrally provided, for example, as a B7 band duplexer or a B34/B39 band duplexer as shown in fig. 6. It should be noted that, to simplify the drawing, the integrally provided diplexer is divided into a dashed frame of the first transmitting module 110 in fig. 6.

The third transmitting module 130 includes a low frequency signal transmitting unit and an SPnT radio frequency switch connected to the low frequency signal transmitting unit, the low frequency signal transmitting unit is connected to the third input port 4G LB RFIN, and the low frequency signal transmitting unit includes at least one low frequency 4G power amplifier. The fourth transmit module 140 includes at least one low frequency 2G power amplifier. The second receiving module 320 includes a plurality of low frequency 4G low noise amplifiers and a radio frequency switch connected to the low frequency 4G low noise amplifiers to receive signals of different frequency bands through different signal transmission paths. The second switch module 220 may include an SPnT switch, where a first terminal of the SPnT switch is connected to the fourth transmitting module 140, and the remaining first terminals are connected to the third transmitting module 130 and the second receiving module 320. Furthermore, the third transmitting module 130 is further provided with a plurality of first low frequency filters on the signal transmission path. The second receiving module 320 is also provided with a plurality of first low-frequency filters in the signal transmission path. The first low-frequency filter on the transmitting path and the receiving path of the same frequency band signal may be integrally provided, for example, as a B8 band duplexer or a B12 band duplexer as shown in fig. 6. It should be noted that, to simplify the drawing, the integrally provided diplexer is divided into a dashed box of the third transmitting module 130 in fig. 6.

Fig. 7 is a seventh schematic structural diagram of the rf PA Mid device 10 according to an embodiment, and referring to fig. 7, IN one embodiment, the rf PA Mid device 10 is further configured with a first auxiliary port LMBH LNA IN for connecting to an antenna. The first receiving module 310 is further connected to the first auxiliary port LMBH LNA IN, and the first receiving module 310 is further configured to support a main set MIMO receiving process for the medium-high frequency signal of the first system from the first auxiliary port LMBH LNA IN. For example, the first receiving module 310 can be used to support a main set MIMO receiving process for medium-high frequency signals in the frequency bands of B40, B41, etc. In this embodiment, by setting the main set MIMO receiving path of the medium-high frequency signal, the receiving speed of the radio frequency system for the medium-high frequency signal of the first system can be effectively improved without increasing the occupied bandwidth.

With continued reference to fig. 7, in one embodiment, the rf PA Mid device 10 is further configured with a second auxiliary port LNA AUX. The second receiving module 320 is further connected to the second auxiliary port lna_aux, and the second receiving module 320 is further configured to support a main set MIMO receiving process for the low frequency signal of the first system from the second auxiliary port lna_aux. In this embodiment, by setting the main set MIMO receiving path of the low frequency signal, the receiving speed of the radio frequency system for the low frequency signal of the first system can be effectively improved without increasing the occupied bandwidth.

Fig. 8 is an eighth schematic structural diagram of the rf PA Mid device 10 according to an embodiment, referring to fig. 8, in one embodiment, the rf PA Mid device 10 is further configured with a first coupling output port CPLOUT and a second coupling output port CPLOUT for connecting to the rf transceiver, and the rf PA Mid device 10 further includes a first coupling module 710 and a second coupling module 720. The first coupling module 710 is disposed on the first rf path between the first switch module 210 and the first mid-high frequency antenna port ANT3, and is configured to couple the rf signal on the first rf path to output a first coupling signal through the first coupling output port CPLOUT. The second coupling module 720 is disposed on a second rf path between the second switch module 220 and the first low-frequency antenna port ANT1, and is configured to couple the rf signal on the second rf path to output a second coupling signal through the second coupling output port CPLOUT. The first coupling module 710 and the second coupling module 720 are configured to couple a radio frequency signal (a low frequency signal, an intermediate frequency signal, or a high frequency signal) on a radio frequency path to detect power information of the radio frequency signal. The coupling module may output a coupling signal to the radio frequency transceiver via the connected first coupling output port CPLOUT or second coupling output port CPLOUT. The coupling signal comprises a forward coupling signal and a reverse coupling signal, and the forward power information of the low-frequency signal can be detected based on the forward coupling signal; based on the reverse coupled signal, reverse power information of the low frequency signal may be correspondingly detected.

IN one embodiment, a radio frequency system is provided, including the radio frequency PA Mid device 10 of any one of the foregoing embodiments, where the second input port 2G HB IN, the first input port 4G HB RFIN, and the first output port LNA OUT of the radio frequency PA Mid device 10 are respectively connected to the radio frequency transceiver 20, and the first Mid-high frequency antenna port ANT3 is connected to the first antenna ANT 1. Based on the rf PA Mid device 10 of the foregoing embodiment, the rf system of the embodiment of the present application can transmit and receive the medium-high frequency signals of two different systems, and has a better integration level. Specifically, taking the rf PA Mid device 10 of the embodiment of fig. 8 as an example for illustration, fig. 9 is one of the schematic structural diagrams of the rf system of an embodiment, including the rf PA Mid device 10, the rf transceiver 20 and the first combiner 610 shown in the embodiment of fig. 8. Referring to fig. 9, in this embodiment, the rf transceiver 20 is connected to the third input port 4GLB RFIN and the fourth input port 2G LB RFIN of the rf PA Mid device 10, respectively. The radio frequency system further includes a first combiner 610, two first ends of the first combiner 610 are respectively connected with the first low-frequency antenna ports ANT1 and the first medium-high frequency antenna ports ANT3 in a one-to-one correspondence manner, and a second end of the first combiner 610 is connected with the first antenna ANT 1. By arranging the first combiner 610, signals in different frequency bands can be combined, so that signal transmission or signal reception can be performed through the same antenna, and the number of antennas to be connected with the radio frequency system can be reduced.

Further, the rf PA Mid device 10 is further configured with a second transceiver port lb_trx, a low frequency transmit port LB TX OUT, and a second auxiliary port lna_aux, the second receiving module 320 is connected to the second auxiliary port lna_aux, the second receiving module 320 is further configured to support a main set MIMO receiving process for the low frequency signal of the first system from the second auxiliary port lna_aux, and the rf system further includes a first low frequency filter. Two first ends of the first low-frequency filter are respectively connected with the low-frequency transmitting port LB TX OUT and the second auxiliary port LNA_AUX in a one-to-one correspondence manner, a second end of the first low-frequency filter is connected with the second receiving and transmitting port LB_TRX, and the first low-frequency filter is used for filtering the low-frequency signals of the first system.

Still further, when the first receiving module 310 is further configured to support main set MIMO receiving processing for the medium-high frequency signals of the first system, the rf PA Mid device 10 may be further configured with a first auxiliary port LMBH LNA IN. The radio frequency system further comprises a third combiner 630. Two first ends of the third combiner 630 are respectively connected to the first auxiliary port LMBH LNA IN and the radio frequency transceiver 20, and a second end of the third combiner 630 is connected to the third antenna ANT 3. When the frequency band required for the main set MIMO receiving process is multiple, the radio frequency PA Mid device 10 may be further configured with multiple first auxiliary ports LMBH LNA IN. Accordingly, the radio frequency system may include a fourth switching module 240 and a plurality of third medium-high frequency filters 431. The third mid-high frequency filter 431 is respectively connected with a plurality of first auxiliary ports LMBH LNA IN a one-to-one correspondence manner, and is used for filtering the mid-high frequency signals of the first system. The first ends of the fourth switch module 240 are respectively connected to the third mid-high frequency filters 431 in a one-to-one correspondence, the second end of the fourth switch module 240 is connected to the auxiliary antenna port ANT5, and the fourth switch module 240 is configured to selectively transmit the mid-high frequency signals of the first system to any one of the third mid-high frequency filters 431.

Based on the above structure, the radio frequency system of the embodiment can transmit, receive and receive the main set of low, medium and high frequency signals of the first system and the second system. Referring to fig. 9, the working principle of the first system is illustrated by taking the medium-high frequency signal as an N41 frequency band signal as an example.

Transmitting link:

signals are output from the TX0 HB port of the radio frequency transceiver 20; entering the radio frequency PA Mid device 10 from the first input port 4G HB RFIN; the SPDT switch is switched to contact 3, amplified by the first transmitting module 110, and then switched to a 3P3T switch; 3P3T is switched to contact 6, filtered by a first medium-high frequency filter and then switched to a first switch module 210; the first switch module 210 switches to contact 1 to the second low frequency antenna port ANT2; via Path03 to the first combiner 610; after the first combiner 610 combines, the signal is output to the ANT1 antenna port through a Path01 Path;

primary set receive link:

signals enter from the ANT1 antenna port, pass through Path01, and reach the first combiner 610; after being split, the first combiner 610 passes through a Path03 to a first Mid-high frequency antenna port ANT3 of the rf PA Mid device 10; the first switch module 210 is switched to the contact 6, filtered by the first medium-high frequency filter and then switched to the 3P3T switch; 3P3T switches to contact 3, to the SP4T #2 switch; the SP4T#2 switches a single port and passes through a low noise amplifier path; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 3, to the first output port LNA OUT3 output; the received signal enters the radio frequency transceiver 20 through the SDR PRX4 port;

Main set MIMO receive Link:

signals enter from the ANT3 antenna port, pass through Path10, and reach the third combiner 630; after the third combiner 630 branches, it goes to the fourth switch module 240; the fourth switching module 240 switches to contact 4, via Path13, to the third mid-high frequency filter 431; after being filtered by a third Mid-high frequency filter 431, to a first auxiliary port LMBH LNA IN2 of the radio frequency PA Mid device 10; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 6, to the first output port LNA OUT6 output; the received signal enters the radio frequency transceiver 20 through the SDR PRX3 port;

it should be noted that, when the first receiving module 310 does not support the main set MIMO reception, the first receiving module 310 does not need to be connected to the first medium-high frequency antenna port ANT3 via a port, but the transmission and main set receiving paths and the working principle of the radio frequency system are the same as those of fig. 9, so that the description thereof will not be repeated.

Fig. 10 is a second schematic structural diagram of an rf system according to an embodiment, referring to fig. 10, in one embodiment, the rf system further includes an rf LFEM device 30. The radio frequency LFEM device 30 is configured with a third output port LNA OUT MHB and a fourth output port LNA OUT LB for connecting the radio frequency transceiver 20, and a third low frequency antenna port LB ANT and a fourth medium and high frequency antenna port MHB ANT for connecting the second antenna ANT 2. The radio frequency LFEM device 30 includes a third receiving module 330, a fourth receiving module 340 and a second combiner 620. The third receiving module 330 is configured to support diversity reception processing of the medium-high frequency signal of the first system from the fourth medium-high frequency antenna port MHB ANT, and the fourth receiving module 340 is configured to support diversity reception processing of the low frequency signal of the first system from the third low frequency antenna port LB ANT. Two first ends of the second combiner 620 are respectively connected to the third low-frequency antenna port LB ANT and the fourth middle-high frequency antenna port MHB ANT in a one-to-one correspondence manner, and a second end of the second combiner 620 is connected to the second antenna ANT 2.

Further, the radio frequency LFEM device 30 is also configured with a third auxiliary port LNA AUX MHB for connecting to a fourth antenna ANT 4. The third receiving module 330 is further configured to support diversity MIMO receiving processing for the medium-high frequency signal of the first system from a third auxiliary port LNA AUX MHB. The radio frequency system further comprises a fourth combiner 640, a fourth medium-high frequency filter 441 and a fourth low frequency filter 541. The second end of the fourth combiner 640 is connected to the fourth antenna ANT 4. The fourth mid-high frequency filter 441 is disposed on the signal transmission path between the fourth combiner 640 and the third receiving module 330, and is configured to perform filtering processing on the mid-high frequency signal of the first system. The fourth low-frequency filter 541 is disposed on the signal transmission path between the fourth combiner 640 and the rf transceiver 20, and is configured to perform filtering processing on the low-frequency signal of the first system. In the present embodiment, there is no need to provide a transmission line of diversity signals in the rf PA Mid device 10 and there is no need to provide an rf switch for switching a transmission path of diversity signals, so that the volume of the rf PA Mid device 10 can be reduced.

Based on the above structure, the radio frequency system of the present embodiment can also perform diversity reception and diversity MIMO reception on low, medium, and high frequency signals of the first system and the second system. Referring to fig. 10, the working principle of the first system is illustrated by taking the medium-high frequency signal as an N41 frequency band signal as an example. It will be appreciated that the working principles of the transmission, the primary set reception and the primary set MIMO reception in this embodiment are similar to those of the embodiment of fig. 9, and will not be described here again.

N41 diversity receive chain:

the signal enters from the ANT2 antenna port, passes through Path09, and goes to the second combiner 620; the second combiner 620 branches to the high-frequency antenna port MHB ANT of the radio-frequency LFEM device 30 via Path 07; SP8T switches to contact 1, to the SP3t#3 switch; the SP3T#3 is switched to a single port, amplified by a low noise amplifier and then switched to a 6P6T switch; 6P6T switches to contact 1 to the third output port LNA OUT MHB1 output; the received signal enters the radio frequency transceiver 20 via the SDR DRX0 port.

N41 diversity MIMO receive link:

signals enter from the ANT4 antenna port, pass through Path15, and go to the fourth combiner 640; after the fourth combiner 640 branches, it goes to the SP3t#2 switch; SP3t#2 switches to contact 4, via Path18, to the fourth mid-high filter; after the fourth medium-high frequency filter is filtered, a third auxiliary port LNA AUX MHB5 to the radio frequency LFEM device 30; SP3T#7 switches single port to low noise amplifier path; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 6 to LNA OUT MHB6 port output; the received signal enters the radio frequency transceiver 20 via the SDR DRXA port.

Fig. 11 is a schematic diagram of a structure of an embodiment of the rf PA Mid device 10, and referring to fig. 11, in one embodiment, the rf PA Mid device 10 is further configured with a first coupling output port CPL OUT for connecting to the rf transceiver 20, and the rf PA Mid device 10 further includes a first coupling module 710, a second coupling module 720, and a sixth switching module 260.

The first coupling module 710 is disposed on a first rf path between the first switch module 210 and the first mid-high frequency antenna port ANT3, and is configured to couple an rf signal on the first rf path to output a first coupling signal. The second coupling module 720 is disposed on a second rf path between the second switch module 220 and the first low-frequency antenna port ANT1, and is configured to couple the rf signal on the second rf path to output a second coupling signal. Two first ends of the sixth switch module 260 are respectively connected with the first coupling module 710 and the second coupling module 720 in a one-to-one correspondence manner, a second end of the sixth switch module 260 is connected with the first coupling output port CPLOUT, and the sixth switch module 260 is configured to selectively transmit the first coupling signal or the second coupling signal to the first coupling output port CPLOUT. It is understood that the first coupling module 710 and the second coupling module 720 of the present embodiment operate in a similar manner to the embodiment of fig. 8, and will not be described herein. In this embodiment, by cascading the first coupling module 710 and the second coupling module 720, when the two coupling modules do not work simultaneously, the switching function of the sixth switching module 260 is enabled, and only one coupling output port CPLOUT is needed to transmit the coupling signal to the rf transceiver 20, so that the number of ports required to be set by the rf PA Mid device 10 can be reduced.

Fig. 12 is a schematic diagram of the structure of the rf PA Mid device 10 according to an embodiment, and referring to fig. 12, in one embodiment, the rf PA Mid device 10 is configured with a plurality of the first transceiver ports TRX. The rf PA Mid device 10 further includes an SP3T switch, where a plurality of second ends of the SP3T switch are respectively connected to a plurality of the first transceiver ports TRX in a one-to-one correspondence manner, and another first end of the first switch module 210 is connected to the first end of the SP3T switch. In this embodiment, by setting a plurality of first transceiver ports TRX, the function expansion of the rf PA Mid device 10 and other devices can be facilitated, so as to provide a more flexible rf PA Mid device 10.

With continued reference to fig. 12, in one embodiment, the rf PA Mid device 10 is further configured with a second Mid-high frequency antenna port ANT4 for connecting an antenna. Wherein the other second end of the first switch module 210 is connected to the second mid-high frequency antenna port ANT4. In this embodiment, the split signal may be transmitted through the rf PA Mid device 10 to reduce the trace length outside the rf PA Mid device 10.

With continued reference to fig. 12, in one embodiment, the rf PA Mid device 10 is further configured with a second low frequency antenna port ANT2 for connection to an antenna, and a diversity receive port LB DRX for connection to the rf LFEM device 30. The rf PA Mid device 10 further includes a third switching module 230. The third switch module 230 includes two first ends and two second ends, the two first ends of the third switch module 230 are respectively connected with the second ends of the second switch module 220 and the diversity receiving ports LB DRX in a one-to-one correspondence manner, and the two second ends of the third switch module 230 are respectively connected with the first low-frequency antenna ports ANT1 and the second low-frequency antenna ports ANT2 in a one-to-one correspondence manner. In this embodiment, by setting the diversity receiving port LB DRX, the function expansion of the rf PA Mid device 10 and other devices can be facilitated, so as to provide a more flexible rf PA Mid device 10.

In one embodiment, based on the rf PA Mid device 10 of the embodiment of fig. 12, a rf system is provided, and fig. 13 is a third schematic structural diagram of the rf system of an embodiment, including the rf PA Mid device 10 of the embodiment of fig. 12. Referring to fig. 13, in this embodiment, the radio frequency system further includes a radio frequency LFEM device 30. The radio frequency LFEM device 30 is configured with a third output port LNA OUT MHB and a fourth output port LNA OUT LB for connecting the radio frequency transceiver 20, and a third low frequency antenna port LB ANT and a fourth medium and high frequency antenna port MHB ANT for connecting the radio frequency PA Mid device 10, the third low frequency antenna port LB ANT being connected with the first transceiving port TRX of the radio frequency PA Mid device 10, the fourth medium and high frequency antenna port MHB ANT being connected with the diversity receiving port LB DRX of the radio frequency PA Mid device 10. The radio frequency LFEM device 30 includes a third receiving module 330, a fourth receiving module 340 and a second combiner 620. The third receiving module 330 is configured to support diversity reception processing of the medium-high frequency signal of the first system from the fourth medium-high frequency antenna port MHB ANT, and the fourth receiving module 340 is configured to support diversity reception processing of the low frequency signal of the first system from the third low frequency antenna port LB ANT. Two first ends of the second combiner 620 are respectively connected to the second low-frequency antenna port ANT2 and the second medium-high frequency antenna port ANT4 in a one-to-one correspondence manner, and a second end of the second combiner 620 is connected to the second antenna ANT 2.

Based on the above structure, the radio frequency system of the present embodiment can transmit low, medium, and high frequency signals of the first system and the second system, receive the main set MIMO, receive the diversity, and receive the diversity MIMO. Referring to fig. 13, the working principle is illustrated by taking the case that the medium-high frequency signal of the first system is an N41 frequency band signal and the low frequency signal of the first system is a B8 frequency band signal.

B8 transmit link:

signals are output from the TX0 LB1 port of the radio frequency transceiver 20; entering the radio frequency PA Mid device 10 from the third input port 4G LB RFIN; after amplifying the signal by the third transmitting module 130, to the SP9T switch; SP9T switches to contact 6, through the B8 duplexer, to SP10T; the SP10T switches the single port to the third switch module 230 switch; the third switching module 230 switches to contact 3 to the first low frequency antenna port ANT1; via Path02 to first combiner 610; after combining, the first combiner 610 passes through Path01 to the ANT1 antenna port.

B8 primary set receive link:

signals enter from the ANT1 antenna port, pass through Path01, and reach the first combiner 610; the first combiner 610 branches to the first low frequency antenna port ANT1 of the rf PA Mid device 10 via Path 02; SP10T switches to contact 6, to SP4T switch; amplifying the amplified signal by a low-noise amplifier and then switching the amplified signal to a DPDT#2 switch; dpdt#2 switches to contact 1 to output to second output port LNA OUT 1; the received signal enters the radio frequency transceiver 20 via the SDR PRXE port.

B8 diversity receive chain:

the signal enters from the ANT2 antenna port, passes through Path09, and goes to the second combiner 620; the second combiner 620 branches to the second low frequency antenna port ANT2 of the rf PA Mid device 10 via Path 07; the third switch module 230 switches to contact 2 to the LB DRX port; via Path05 to the third low frequency antenna port LB ANT of the radio frequency LFEM device 30; SP6T switches to contact 5 to the B8 PRX path; the SP3T#2 switches a single port, and is amplified by a low noise amplifier and then reaches a DPDT switch; DPDT switches to contact 2 to LNA OUT LB2; the received signal enters the radio frequency transceiver 20 via the SDR DRX10 port.

N41 transmit link:

signals are output from the TX0 HB port of the radio frequency transceiver 20; entering the radio frequency PA Mid device 10 from the first input port 4G HB RFIN; the SPDT switch is switched to contact 3, amplified by the first transmitting module 110, and then switched to a 3P3T switch; 3P3T is switched to contact 6, filtered by a first medium-high frequency filter and then sent to a first switch module 210; the first switch module 210 switches to contact 1 to the first mid-high frequency antenna port ANT3; via Path03 to the first combiner 610; after the first combiner 610 combines, the signal is output to the ANT1 antenna port via a Path 01.

N41 primary set receive link:

signals enter from the ANT1 antenna port, pass through Path01, and reach the first combiner 610; after being split, the first combiner 610 passes through a Path03 to a first Mid-high frequency antenna port ANT3 of the rf PA Mid device 10; the first switch module 210 is switched to the contact 6, filtered by the first medium-high frequency filter and then switched to the 3P3T switch; 3P3T switches to contact 3, to the SP4T #2 switch; the SP4T#2 switches a single port and passes through a low noise amplifier path; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 3, to the first output port LNA OUT3 output; the received signal enters the radio frequency transceiver 20 via the SDR PRX4 port.

N41 diversity receive chain:

the signal enters from the ANT2 antenna port, passes through Path09, and goes to the second combiner 620; after being split, the second combiner 620 passes through a Path08 to the ANT4 port of the radio frequency LFEM device 30; SP8T switches to contact 9 to TRX2 port; via Path06 to the high frequency antenna port MHB ANT of the radio frequency LFEM device 30; SP8T switches to contact 1, to the SP3t#3 switch; the SP3T#3 is switched to a single port, amplified by a low noise amplifier and then switched to a 6P6T switch; 6P6T switches to contact 1 to the third output port LNA OUT MHB1 output; the received signal enters the radio frequency transceiver 20 via the SDR DRX0 port.

N41 main set MIMO receive link:

signals enter from the ANT3 antenna port, pass through Path10, and reach the third combiner 630; after the third combiner 630 branches, it goes to the fourth switch module 240; via Path13 to third medium-high frequency filter 431; after being filtered by a third Mid-high frequency filter 431, to a first auxiliary port LMBH LNA IN2 of the radio frequency PA Mid device 10; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 6, to the first output port LNA OUT6 output; the received signal enters the radio frequency transceiver 20 via the SDR PRX3 port.

N41 diversity MIMO receive link:

signals enter from the ANT4 antenna port, pass through Path15, and go to the fourth combiner 640; after combining, the fourth combiner 640 switches to the SP3t#2 switch; a Path18 is passed through to a fourth medium-high frequency filter; after the fourth medium-high frequency filter is filtered, a third auxiliary port LNA AUX MHB5 to the radio frequency LFEM device 30; SP3T#7 switches single port to low noise amplifier path; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 6 to LNA OUT MHB6 port output; the received signal enters the radio frequency transceiver 20 via the SDR DRXA port.

Fig. 14 is an eleventh schematic structural diagram of the rf PA Mid device 10 according to an embodiment, referring to fig. 14, in one embodiment, the rf PA Mid device 10 is further configured with a first receiving port B28A PRX MIMO for connecting an antenna, the second receiving module 320 is further configured to support a main set MIMO receiving process for the low frequency signal of the first system from the first receiving port B28A PRX MIMO, and the rf PA Mid device 10 further includes a third low frequency filter 531. The third low-frequency filter 531 is connected to the main set MIMO receiving path of the low-frequency signal in the second receiving module 320 and the first receiving port B28A PRX MIMO, and is configured to perform filtering processing on the low-frequency signal of the first system. In the present embodiment, by providing the third low-frequency filter 531, the low-frequency signal of the first system input through the first receiving port B28APRX MIMO can be subjected to filtering processing, thereby improving the signal receiving quality.

With continued reference to fig. 14, in one embodiment, the radio frequency PA Mid device 10 is further configured with an auxiliary antenna port ANT5 for connecting an antenna, and the first receiving module 310 is further configured to support a main set MIMO receiving process for the medium-high frequency signal of the first system from the auxiliary antenna port ANT 5. The first receiving module 310 further includes a plurality of third mid-high frequency filters 431, where the third mid-high frequency filters 431 are respectively disposed on the plurality of main set MIMO receiving paths of the mid-high frequency signals of the first system in a one-to-one correspondence manner, and are configured to perform filtering processing on the mid-high frequency signals of the first system. The rf PA Mid device 10 further includes a fourth switching module 240. The first ends of the fourth switch module 240 are respectively connected to the third mid-high frequency filters 431 in a one-to-one correspondence, and the second end of the fourth switch module 240 is connected to the auxiliary antenna port ANT 5.

In one embodiment, based on the rf PA Mid device 10 of the embodiment of fig. 14, a rf system is provided, and fig. 15 is a schematic structural diagram of the rf system of one embodiment, including the rf PA Mid device 10 of the embodiment of fig. 14. Referring to fig. 15, in the present embodiment, when the first receiving port B28A PRX MIMO and the auxiliary antenna port ANT5 are further configured, the radio frequency system further includes a third combiner 630. Two first ends of the third combiner 630 are respectively connected to the auxiliary antenna port ANT5 and the first receiving port B28APRX MIMO in a one-to-one correspondence manner, and a second end of the third combiner 630 is connected to the third antenna ANT 3.

Based on the above structure, the radio frequency system of the embodiment can transmit, receive and receive the main set of low, medium and high frequency signals of the first system and the second system. Referring to fig. 15, the working principle of the first system is illustrated by taking the medium-high frequency signal as an N41 frequency band signal as an example.

N41 transmit link:

N41 primary set receive link:

N41 diversity receive chain:

N41 main set MIMO receive link:

signals enter from the ANT3 antenna port, pass through Path10, and reach the third combiner 630; after branching, the third combiner 630 goes to the ANT5 port of the rf PA Mid device 10; the SP3T#3 is switched to a contact 4, filtered by a Filter and then goes to a low noise amplifier; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 6, to the first output port LNA OUT6 output; the received signal enters the radio frequency transceiver 20 via the SDR PRX3 port.

N41 diversity MIMO receive link:

Fig. 16 is a schematic diagram of a rf PA Mid device 10 according to an embodiment, and referring to fig. 16, in one embodiment, the second receiving module 320 is further configured to support a main set MIMO receiving process for the low frequency signal of the first system from the auxiliary antenna port ANT 5. The second receiving module 320 further includes a third low-frequency filter 531, where the third low-frequency filter 531 is disposed on a main set MIMO receiving path of the low-frequency signal of the first system, and is configured to perform filtering processing on the low-frequency signal of the first system. The rf PA Mid device 10 further includes a third combiner 630, two first ends of the third combiner 630 are respectively connected to the second end of the fourth switch module 240 and the third low-frequency filter 531 in a one-to-one correspondence manner, and the second end of the third combiner 630 is connected to the auxiliary antenna port ANT 5. In this embodiment, by providing the third combiner 630, the medium-high frequency signal and the low frequency signal of the first system can be transmitted through the same auxiliary antenna port ANT5, so as to reduce the number of ports that the radio frequency PAMid device 10 needs to set, and reduce the signal routing outside the device.

In one embodiment, a rf system is provided based on the rf PA Mid device 10 of the embodiment of fig. 16, and fig. 17 is a schematic diagram of the rf system of one embodiment, including the rf PA Mid device 10 of the embodiment of fig. 16. Referring to fig. 17, in the present embodiment, the auxiliary antenna port ANT5 is connected to the third antenna ANT 3.

Based on the above structure, the radio frequency system of the present embodiment can transmit low, medium, and high frequency signals of the first system and the second system, receive the main set MIMO, receive the diversity, and receive the diversity MIMO. Referring to fig. 17, the working principle of the first system low frequency signal is illustrated by taking the first system low frequency signal as an N28 band signal as an example.

N28 transmit link:

n28 TX is output from the TX0 LB1 port of the radio frequency transceiver 20; entering the radio frequency PA Mid device 10 from the third input port 4G LB RFIN; amplified by LB PA, and then sent to an SP9T switch; SP9T switches to contact 9 to spdt#1 switch; spdt#1 is filtered by the B28 diplexer, and then switched to the SP10T switch; SP10T switches to contact 11 to third switch module 230 switch; the third switching module 230 switches to contact 3 to the first low frequency antenna port ANT1; via Path02 to first combiner 610; after the first combiner 610 combines, the signal is output to the ANT1 antenna port via a Path 01.

N28 primary set receive link:

signals enter from the ANT1 antenna port, pass through Path01, and reach the first combiner 610; after being split, the first combiner 610 passes through a Path02 to a first low-frequency antenna port ANT1 of the rf PA Mid device 10; SP10T is switched to contact 9, and after being filtered by the B28 duplexer, the SP10T is switched to an SP6T switch; SP6T is switched to a single port, amplified by a low noise amplifier and then switched to a DPDT#2 switch; DPDT #2 switches to contact 2 to LNA OUT2 port output; the received signal enters the radio frequency transceiver 20 via the SDR PRX10 port.

N28 diversity receive links:

the signal enters from the ANT2 antenna port, passes through Path09, and goes to the second combiner 620; after being split, the second combiner 620 passes through a Path07 to the second low-frequency antenna port ANT2 of the rf PA Mid device 10; the third switch module 230 switches to contact 2 to the LB DRX port; via Path05 to the third low frequency antenna port LB ANT of the radio frequency LFEM device 30; SP6T switches to contact 5, after filtering with an N28 filter, to the fourth switching module 240; the fourth switch module 240 switches the single port, and after amplifying by the low noise amplifier, the single port is connected to the DPDT switch; the DPDT switch is switched to contact 1 to fourth output port LNA OUT LB1; the received signal enters the radio frequency transceiver 20 via the SDR drx port.

N28 main set MIMO receive link:

signals enter from the ANT3 antenna port, pass through the Path10 Path, and reach the ANT5 port of the rf PA Mid device 10; after the third combiner 630 shunts, filtering by an N28 filter to the SP5T switch; SP5T switches single port, amplified by low noise amplifier, and then sent to DPDT#2 switch; dpdt#2 switches to contact 1 to output to second output port LNA OUT 1; the received signal enters the radio frequency transceiver 20 via the SDR PRXE port.

N28 diversity MIMO receive links:

Signals enter from the ANT4 antenna port, pass through Path15, and go to the fourth combiner 640; the fourth combiner 640 branches off and then passes through Path19 to the filter for filtering, and the received signal enters the rf transceiver 20 through the SDR DRX5 port.

Fig. 18 is a thirteenth schematic structural diagram of the rf PA Mid device 10 according to an embodiment, referring to fig. 18, in one embodiment, the first receiving module 310 is further configured to support a main set MIMO receiving process for the medium-high frequency signals of the first system from the auxiliary antenna port ANT5, the first receiving module 310 further includes a plurality of third medium-high frequency filters 431, and the plurality of third medium-high frequency filters 431 are respectively disposed on the plurality of main set MIMO receiving paths of the medium-high frequency signals of the first system in a one-to-one correspondence manner, and are configured to perform a filtering process for the medium-high frequency signals of the first system. The second receiving module 320 is further configured to support a main set MIMO receiving process for the low frequency signal of the first system from the auxiliary antenna port ANT5, and the second receiving module further includes a third low frequency filter 531, where the third low frequency filter 531 is disposed on a main set MIMO receiving path of the low frequency signal of the first system, and is configured to perform a filtering process for the low frequency signal of the first system.

The rf PA Mid device 10 also includes a fifth switching module 250. The first ends of the fifth switch module 250 are respectively connected to the third mid-high frequency filters 431 and the third low frequency filters 531 in a one-to-one correspondence, and the second end of the fifth switch module 250 is connected to the auxiliary antenna port ANT 5. In this embodiment, by providing the fifth switching module 250, the path selection function of the fourth switching module 240 and the third combiner 630 in the embodiment of fig. 16 may be replaced, so as to provide a radio frequency PA Mid device 10 with a higher integration level. It will be appreciated that the rf system formed by the rf PA Mid device 10 according to the embodiment of fig. 18 is similar to that of fig. 17, and thus will not be described in detail.

Fig. 19 is a sixth schematic structural diagram of an rf system according to an embodiment, including an rf transceiver 20, an rf LFEM device 30, and an rf PA Mid device 10 according to the embodiment of fig. 12. Wherein the radio frequency LFEM device 30 is further configured with a fifth mid-high frequency antenna port DRX MIMO IN and a fourth low frequency antenna port B28A DRX MIMO for connecting a fourth antenna ANT 4. The third receiving module 330 is further configured to support diversity MIMO receiving processing for the medium-high frequency signal of the first system from the fifth medium-high frequency antenna port DRX MIMO IN, the fourth receiving module 340 is further configured to support diversity MIMO receiving processing for the low frequency signal of the first system from the fourth low frequency antenna port B28A DRX MIMO, and the radio frequency system further includes a fourth combiner 640. Two first ends of the fourth combiner 640 are respectively connected with the fifth intermediate-high frequency antenna port DRX MIMO IN and the fourth low frequency antenna port B28A DRX MIMO IN a one-to-one correspondence manner, and a second end of the fourth combiner 640 is connected with the fourth antenna ANT 4.

Based on the above structure, the radio frequency system of the present embodiment can transmit low, medium, and high frequency signals of the first system and the second system, receive the main set MIMO, receive the diversity, and receive the diversity MIMO. Referring to fig. 19, the working principle is illustrated by taking the case that the medium-high frequency signal of the first system is an N41 frequency band signal and the low frequency signal of the first system is a B8 frequency band signal.

B8 transmit link:

B8 primary set receive link:

signals enter from the ANT1 antenna port, pass through Path01, and reach the first combiner 610; after being split, the first combiner 610 is connected to the first low-frequency antenna port ANT1 of the radio-frequency PAMid device 10 via Path 02; SP10T switches to contact 6, to SP4T switch; amplifying the amplified signal by a low-noise amplifier and then switching the amplified signal to a DPDT#2 switch; dpdt#2 switches to contact 1 to output to second output port LNA OUT 1; the received signal enters the radio frequency transceiver 20 via the SDR PRXE port.

B8 diversity receive chain:

N41 transmit link:

N41 primary set receive link:

N41 diversity receive chain:

N41 main set MIMO receive link:

N41 diversity MIMO receive link:

signals enter from the ANT4 antenna port, pass through Path15, and go to the fourth combiner 640; after combining, the fourth combiner 640 switches to the SP3t#2 switch; via Path17 to the DRX MIMO IN port of the radio frequency LFEM device 30; the SP3T#8 is switched to the contact 4, filtered by a Filter and switched to the SP3 T#7; SP3T#7 switches single port to low noise amplifier path; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 6 to LNA OUT MHB6 port output; the received signal enters the radio frequency transceiver 20 via the SDR DRXA port.

Fig. 20 is a schematic diagram of a rf system according to an embodiment, including an rf transceiver 20, an rf LFEM device 30, and an rf PA Mid device 10 according to the embodiment of fig. 12. Wherein the radio frequency LFEM device 30 is further configured with a fifth mid-high frequency antenna port DRX MIMO IN for connecting to a fourth antenna ANT4, the third receiving module 330 is further configured to support diversity MIMO receiving processing of the mid-high frequency signals of the first system from the fifth mid-high frequency antenna port DRX MIMO IN, and the radio frequency LFEM device 30 further includes a fourth combiner 640. Two first ends of the fourth combiner 640 are respectively connected with the third receiving module 330 and the fourth receiving module 340 IN a one-to-one correspondence manner, and a second end of the fourth combiner 640 is connected with the fifth intermediate-high frequency antenna port DRX MIMO IN. In this embodiment, by integrating the fourth mid-high frequency filter 441 and the fourth combiner 640 in the rf LFEM device 30, the number of filters and combiners that are externally hung in the rf system can be reduced, thereby improving the integration level of the rf system.

Based on the above structure, the radio frequency system of the present embodiment can transmit low, medium, and high frequency signals of the first system and the second system, receive the main set MIMO, receive the diversity, and receive the diversity MIMO. Referring to fig. 20, the working principle of the first system is illustrated by taking the medium-high frequency signal as an N41 frequency band signal as an example.

N41 transmit link:

N41 primary set receive link:

N41 diversity receive chain:

N41 main set MIMO receive link:

N41 diversity MIMO receive link:

signals enter from the ANT4 antenna port and pass through a Path15 Path to the radio frequency LFEM device 30DRX MIMO IN port; after the fourth combiner 640 branches, to the SP3t#8 switch; the SP3T#8 switches a single port, and after filtering by a Filter, the SP3T#7 switch is started; SP3T#7 switches single port to low noise amplifier path; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 6 to LNA OUT MHB6 port output; the received signal enters the radio frequency transceiver 20 via the SDR DRXA port.

Fig. 21 is a schematic diagram of an rf system according to an embodiment, including an rf transceiver 20, an rf LFEM device 30, and an rf PA Mid device 10 according to the embodiment of fig. 12. Wherein the radio-frequency LFEM device 30 is further configured with a fifth mid-high frequency antenna port DRX MIMO IN for connecting to a fourth antenna ANT4, the third receiving module 330 is further configured to support diversity MIMO receiving processing of mid-high frequency signals of the first system from the fifth mid-high frequency antenna port DRX MIMO IN, the fourth receiving module 340 is further configured to support diversity MIMO receiving processing of low frequency signals of the first system from the fifth mid-high frequency antenna port DRX MIMO IN, the radio-frequency LFEM device 30 further comprises a fourth mid-high frequency filter 441, a fourth low frequency filter 541 and a seventh switching module. The fourth mid-high frequency filter 441 is respectively connected with the diversity receiving path and the diversity MIMO receiving path of the mid-high frequency signal of the first system in a one-to-one correspondence manner, and is used for filtering the mid-high frequency signal of the first system. The fourth low-frequency filter 541 is connected to the diversity MIMO receiving paths of the low-frequency signal of the first system in a one-to-one correspondence manner, and is configured to perform filtering processing on the low-frequency signal of the first system. The first ends of the seventh switch module are respectively connected with the fourth mid-high frequency filters 441 and the fourth low frequency filters 541 in a one-to-one correspondence, and the seventh switch module is configured to selectively transmit the signal received by the fourth antenna ANT4 to any one of the connected filters.

N41 transmit link:

N41 primary set receive link:

N41 diversity receive chain:

N41 main set MIMO receive link:

N41 diversity MIMO receive link:

signals enter from the ANT4 antenna port and pass through a Path15 Path to the radio frequency LFEM device 30DRX MIMO IN port; after the fourth combiner 640 branches, to the SP4t#2 switch; the SP4T#2 switches a single port and is filtered by a Filter to reach an SP3T#7 switch; SP3T#7 switches single port to low noise amplifier path; amplifying the signal by a low-noise amplifier and then switching the signal to a 6P6T switch; 6P6T switches to contact 6 to LNA OUT MHB6 port output; the received signal enters the radio frequency transceiver 20 via the SDR DRXA port.

The embodiment of the application also provides a communication device, which is provided with the radio frequency system in any embodiment. By arranging the radio frequency system on the communication equipment, the transmission processing of the medium-high frequency signals with different systems can be realized. Because the signals processed by the first transmitting module 110 and the second transmitting module 120 are medium-high frequency signals, the integrated configuration has better compatibility. Moreover, since the mid-high frequency signals of different systems do not need to be transmitted at the same time, by setting the first switch module 210, the mid-high frequency signals of different systems can be transmitted through the same first mid-high frequency antenna port ANT3 in a time-sharing manner, so that the number of the antenna ports required to be set is reduced, the integration level of the radio frequency system is improved, and meanwhile, the layout and the wiring are simplified, and the cost is saved.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few implementations of the present examples, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made to the present application without departing from the spirit of the embodiments of the application. Accordingly, the protection scope of the patent of the embodiments of the application shall be subject to the appended claims.

Claims

1. A radio frequency PA Mid device configured with first and second input ports for connecting a radio frequency transceiver, a third input port and a fourth input port, a first low frequency antenna port for connecting an antenna, and a first medium and high frequency antenna port for connecting an antenna, the radio frequency PA Mid device comprising:

the first switch module comprises a plurality of first ends and a plurality of second ends, part of the first ends of the first switch module are respectively connected with the first transmitting module and the second transmitting module, one second end of the first switch module is connected with the first medium-high frequency antenna port, and the first switch module is used for selectively conducting a signal transmission path between any first end and the second end connected with the first medium-high frequency antenna port so that medium-high frequency signals in different modes are transmitted through the same first medium-high frequency antenna port in a time sharing way;

The third transmitting module is connected with the third input port and is used for supporting the transmitting processing of the low-frequency signals of the first system from the third input port;

the fourth transmitting module is connected with the fourth input port and is used for supporting the transmitting processing of the low-frequency signals of the second system from the fourth input port;

the second switch module comprises a plurality of first ends and a plurality of second ends, part of the first ends of the second switch module are respectively connected with the fourth transmitting module and the third transmitting module in a one-to-one correspondence manner, one second end of the second switch module is connected with the first low-frequency antenna port, and the second switch module is used for selecting and conducting any first end and a signal transmission path connected between the second ends of the first low-frequency antenna port, so that low-frequency signals of different systems are transmitted through the same first low-frequency antenna port in a time-sharing manner.

2. The rf PA Mid device of claim 1, further configured with a first output port for connecting to a rf transceiver, the rf PA Mid device further comprising:

the first receiving module is connected with the first output port and is used for supporting the receiving processing of the medium-high frequency signals of the first system from the first medium-high frequency antenna port and transmitting the processed signals to the first output port;

And a part of first ends of the first switch modules are connected with the first receiving modules, and the first switch modules are also used for selectively transmitting the medium-high frequency signals of the first system from the first medium-high frequency antenna ports to the first receiving modules.

3. The rf PA Mid device of claim 2, further configured with a second output port for connecting to the rf transceiver, the rf PA Mid device further comprising:

the second receiving module is connected with the second output port and is used for supporting the receiving processing of the low-frequency signals of the first system from the first low-frequency antenna port and transmitting the processed signals to the second output port;

and a part of first ends of the second switch modules are connected with the second receiving modules, and the second switch modules are also used for selectively transmitting the low-frequency signals of the first system from the first low-frequency antenna port to the second receiving modules.

4. The rf PA Mid device of claim 3, further configured with a first transceiver port for connecting to a rf LFEM device;

wherein a first end of the first switch module is connected with the first receiving and transmitting port.

5. The rf PA Mid device of claim 4, further configured with a second Mid-high frequency antenna port for connecting an antenna;

the other second end of the first switch module is connected with the second medium-high frequency antenna port.

6. The rf PA Mid device of claim 3, further configured with a second low frequency antenna port for connecting an antenna, and a diversity receive port for connecting an rf LFEM device, the rf PA Mid device further comprising:

the third switch module comprises two first ends and two second ends, the two first ends of the third switch module are respectively connected with the second ends of the second switch module and the diversity receiving ports in one-to-one correspondence, and the two second ends of the third switch module are respectively connected with the first low-frequency antenna ports and the second low-frequency antenna ports in one-to-one correspondence.

7. The rf PA Mid device according to any one of claims 3-6, further configured with an auxiliary antenna port for connecting an antenna, wherein the first receiving module is further configured to support a main set MIMO receiving process for the medium-high frequency signal of the first system from the auxiliary antenna port, and the first receiving module further includes a plurality of third medium-high frequency filters, which are respectively disposed on a plurality of main set MIMO receiving paths of the medium-high frequency signal of the first system in a one-to-one correspondence manner, and are configured to perform a filtering process for the medium-high frequency signal of the first system; the radio frequency PA Mid device further comprises:

And the fourth switch module is used for selecting and transmitting the medium-high frequency signals of the first system to any one of the third medium-high frequency filters.

8. The rf PA Mid device according to claim 7, wherein the second receiving module is further configured to support a main set MIMO receiving process for the low frequency signal of the first system from the auxiliary antenna port, and the second receiving module further includes a third low frequency filter, provided on a main set MIMO receiving path for the low frequency signal of the first system, for performing a filtering process for the low frequency signal of the first system; the radio frequency PA Mid device further comprises:

and the two first ends of the third combiner are respectively connected with the second end of the fourth switch module and the third low-frequency filter in a one-to-one correspondence manner, and the second end of the third combiner is connected with the auxiliary antenna port.

9. The rf PA Mid device according to any one of claims 3-6, further configured with a first receive port for connecting an antenna, the second receive module further configured to support a main set MIMO receive process for low frequency signals of the first format from the first receive port, the second receive module further comprising:

The third low-frequency filter is arranged on the main set MIMO receiving channel of the low-frequency signals of the first system, is connected with the first receiving port and is used for filtering the low-frequency signals of the first system.

10. The radio frequency PA Mid device according to any one of claims 3-6, further configured with an auxiliary antenna port for connecting an antenna;

the first receiving module is further configured to support main set MIMO receiving processing for the medium-high frequency signals of the first system from the auxiliary antenna port, where the first receiving module further includes a plurality of third medium-high frequency filters, and each of the third medium-high frequency filters is disposed on a plurality of main set MIMO receiving paths of the medium-high frequency signals of the first system and is configured to perform filtering processing for the medium-high frequency signals of the first system;

the second receiving module is further configured to support main set MIMO receiving processing for the low frequency signal of the first system from the auxiliary antenna port, where the second receiving module further includes a third low frequency filter, provided on a main set MIMO receiving path of the low frequency signal of the first system, and configured to perform filtering processing for the low frequency signal of the first system;

The radio frequency PA Mid device further comprises:

and the first ends of the fifth switch modules are respectively connected with the third medium-high frequency filters and the third low frequency filters in a one-to-one correspondence manner, and the second ends of the fifth switch modules are connected with the auxiliary antenna ports.

11. The radio frequency PA Mid device according to any one of claims 2-6, further configured with a first auxiliary port for connecting an antenna;

the first receiving module is further connected with the first auxiliary port, and is further used for supporting main set MIMO receiving processing of the medium-high frequency signals of the first standard from the first auxiliary port.

12. The rf PA Mid device according to any one of claims 1-6, further configured with a first coupling-out port for connecting to the rf transceiver, the rf PA Mid device further comprising:

the first coupling module is arranged on a first radio frequency channel between the first switch module and the first medium-high frequency antenna port and is used for coupling radio frequency signals on the first radio frequency channel to output first coupling signals;

The second coupling module is arranged on a second radio frequency channel between the second switch module and the first low-frequency antenna port and is used for coupling radio frequency signals on the second radio frequency channel to output second coupling signals;

and the second end of the sixth switch module is connected with the first coupling output port, and the sixth switch module is used for selectively transmitting the first coupling signal or the second coupling signal to the first coupling output port.

13. The rf PA Mid device according to any one of claims 1-6, further configured with a first and a second coupling-out port for connecting the rf transceiver, the rf PA Mid device further comprising:

the first coupling module is arranged on a first radio frequency channel between the first switch module and the first medium-high frequency antenna port and is used for coupling radio frequency signals on the first radio frequency channel so as to output first coupling signals through the first coupling output port;

the second coupling module is arranged on a second radio frequency channel between the second switch module and the first low-frequency antenna port and is used for coupling radio frequency signals on the second radio frequency channel so as to output second coupling signals through the second coupling output port.

14. A radio frequency system, comprising: a radio frequency transceiver and a radio frequency PA Mid device as claimed in any one of claims 1 to 13; wherein,

15. The radio frequency system of claim 14, wherein when the radio frequency PA Mid device includes a third transmit module and a fourth transmit module and is configured with a third input port, a fourth input port, and a first low frequency antenna port, the radio frequency transceiver is connected to the third input port, the fourth input port, respectively, of the radio frequency PA Mid device, the radio frequency system further comprising:

the first ends of the first combiner are respectively connected with the first low-frequency antenna ports and the first medium-high frequency antenna ports in a one-to-one correspondence manner, and the second ends of the first combiner are connected with the first antennas.

16. The radio frequency system of claim 14, wherein when the radio frequency PA Mid device includes a second receiving module, the radio frequency PA Mid device is further configured with a second transmit port, a low frequency transmit port, and a second auxiliary port, the second receiving module is connected to the second auxiliary port, the second receiving module is further configured to support a main set MIMO receiving process for the low frequency signals of the first format from the second auxiliary port, the radio frequency system further comprising:

The first low-frequency filter is connected with the low-frequency transmitting port and the second auxiliary port in a one-to-one correspondence manner, the second end of the first low-frequency filter is connected with the second receiving and transmitting port, and the first low-frequency filter is used for filtering the low-frequency signals of the first standard.

17. The radio frequency system of claim 14, wherein the auxiliary antenna port is connected to a third antenna when the radio frequency PA Mid device is configured with an auxiliary antenna port.

18. The radio frequency system of claim 14, wherein when the radio frequency PA Mid device is further configured with a first receive port and an auxiliary antenna port, the radio frequency system further comprises:

and the two first ends of the third combiner are respectively connected with the auxiliary antenna ports and the first receiving ports in a one-to-one correspondence manner, and the second end of the third combiner is connected with a third antenna.

19. The radio frequency system of claim 14, wherein when the radio frequency PA Mid device is configured with a diversity receive port, a first transmit receive port, a second low frequency antenna port, and a second medium and high frequency antenna port, the radio frequency system further comprises:

A radio frequency LFEM device configured with a third output port and a fourth output port for connecting the radio frequency transceiver, and a third low frequency antenna port and a fourth medium and high frequency antenna port for connecting the radio frequency PA Mid device, the third low frequency antenna port being connected to the first transmit-receive port of the radio frequency PA Mid device, the fourth medium and high frequency antenna port being connected to the diversity receive port of the radio frequency PA Mid device, the radio frequency LFEM device comprising a third receiving module and a fourth receiving module, the third receiving module being configured to support diversity receive processing of medium and high frequency signals of the first format from the fourth medium and high frequency antenna port, the fourth receiving module being configured to support diversity receive processing of low frequency signals of the first format from the third low frequency antenna port;

the two first ends of the second combiner are respectively connected with the second low-frequency antenna port and the second medium-high frequency antenna port in a one-to-one correspondence manner, and the second end of the second combiner is connected with the second antenna.

20. The radio frequency system of claim 14, further comprising:

A radio frequency LFEM device configured with a third output port and a fourth output port for connecting the radio frequency transceiver, and a third low frequency antenna port and a fourth medium and high frequency antenna port for connecting a second antenna, the radio frequency LFEM device comprising a third receiving module for supporting diversity reception processing of a medium and high frequency signal of the first system from the fourth medium and high frequency antenna port, and a fourth receiving module for supporting diversity reception processing of a low frequency signal of the first system from the third low frequency antenna port;

and the two first ends of the second combiner are respectively connected with the third low-frequency antenna port and the fourth medium-high frequency antenna port in a one-to-one correspondence manner, and the second end of the second combiner is connected with the second antenna.

21. The radio frequency system according to claim 19 or 20, wherein the radio frequency LFEM device is further configured with a fifth medium-high frequency antenna port for connecting a fourth antenna, the third receiving module is further configured to support diversity MIMO receiving processing of medium-high frequency signals of the first system from the fifth medium-high frequency antenna port, the radio frequency LFEM device further comprising:

And the second end of the fourth combiner is connected with the fifth medium-high frequency antenna port.

22. The radio frequency system according to claim 19 or 20, wherein the radio frequency LFEM device is further configured with a fifth medium-high frequency antenna port and a fourth low frequency antenna port for connecting a fourth antenna, the third receiving module is further configured to support diversity MIMO receiving processing of medium-high frequency signals of the first system from the fifth medium-high frequency antenna port, the fourth receiving module is further configured to support diversity MIMO receiving processing of low frequency signals of the first system from the fourth low frequency antenna port, the radio frequency system further comprising:

and the second end of the fourth combiner is connected with the fourth antenna.

23. The radio frequency system of claim 21, further comprising:

the fourth medium-high frequency filter is arranged on a signal transmission path between the fourth combiner and the third receiving module and is used for filtering the medium-high frequency signals of the first system;

And the fourth low-frequency filter is arranged on a signal transmission path between the fourth combiner and the fourth receiving module and is used for filtering the low-frequency signals of the first system.

24. The radio frequency system according to claim 19 or 20, wherein the radio frequency LFEM device is further configured with a fifth mid-high frequency antenna port for connecting a fourth antenna;

the third receiving module is further configured to support diversity MIMO receiving processing of the medium-high frequency signal of the first system from the fifth medium-high frequency antenna port, and the third receiving module further includes a fourth medium-high frequency filter, provided on a diversity MIMO receiving path of the medium-high frequency signal of the first system, configured to perform filtering processing on the medium-high frequency signal of the first system;

the fourth receiving module is further configured to support diversity MIMO receiving processing of the low-frequency signal of the first system from the fifth middle-high frequency antenna port, and the fourth receiving module further includes a fourth low-frequency filter, provided on a diversity MIMO receiving path of the low-frequency signal of the first system, configured to perform filtering processing on the low-frequency signal of the first system;

the radio frequency LFEM device further comprises:

And the seventh switch module is used for selecting and transmitting signals received by the fourth antenna to any filter connected with the fourth switch module, wherein the first ends of the seventh switch module are respectively connected with the fourth medium-high frequency filters and the fourth low frequency filters in a one-to-one correspondence manner.

25. A communication device comprising a radio frequency system as claimed in any one of claims 14 to 24.