CN115102557B

CN115102557B - Radio frequency front-end device and radio frequency system

Info

Publication number: CN115102557B
Application number: CN202210636363.9A
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: 2024-05-24
Anticipated expiration: 2042-06-07
Also published as: CN115102557A

Abstract

The application provides a radio frequency front-end device and a radio frequency system, wherein the radio frequency front-end device comprises: a first transceiver circuit for supporting transmission of a first frequency band signal from the radio frequency transceiver and supporting reception of a primary set of first frequency band signals; a second transceiver circuit for supporting transmission of a second frequency band signal from the radio frequency transceiver and supporting primary set reception and primary set MIMO reception of the second frequency band signal; a first receiving circuit for supporting diversity reception of the first frequency band signal; the second receiving circuit is used for supporting diversity receiving and diversity MIMO receiving of the second frequency band signal, can realize double connection combination of the 4G-LTE signal and the 5G-NR signal, and supports 4 x 4MIMO function of the second frequency band signal, and can improve communication performance while improving integration level, reducing occupied area and cost, and being beneficial to miniaturization design of a radio frequency system.

Description

Radio frequency front-end device and radio frequency system

Technical Field

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

Background

With the development and progress of technology, mobile communication technology is gradually beginning to be applied to communication devices. For communication devices supporting 5G communication technology, it is desirable to satisfy a 4G signal (e.g., B8 band) working with a 5G signal (e.g., N41 band) in a Non-independent networking (Non-Standalone, NSA) mode.

However, in the related art of the 4 antenna architecture rf system, the rf system generally employs a plurality of discrete modules, such as a plurality of discrete transceiver modules and a plurality of discrete receiver modules, to support dual connection of the 4G signal and the 5G signal, which is costly and occupies a large space.

Disclosure of Invention

The embodiment of the application provides a radio frequency front-end device and a radio frequency system, which can realize double connection combination of a 4G-LTE signal and a 5G-NR signal and support a 4X 4MIMO function of a second frequency band signal, and can improve the communication performance while improving the integration level, reducing the occupied area and the cost, and being beneficial to the miniaturized design of the radio frequency system.

The embodiment of the application provides a radio frequency front-end device, which is configured with a first antenna port, a second antenna port, a third antenna port, a fourth antenna port, at least one first MIMO antenna port, at least one second MIMO antenna port, a first input port, a second input port and a plurality of output ports for connecting with a radio frequency transceiver, wherein the radio frequency front-end device comprises:

The first transceiver circuit is respectively connected with the first input port, the output port and the first antenna port and is used for supporting the transmission of the first frequency band signals from the radio frequency transceiver and supporting the main set reception of the first frequency band signals;

The second transceiver circuit is respectively connected with the second input port, the output port, the second antenna port and each first MIMO antenna port and is used for supporting the transmission of the second frequency band signals from the radio frequency transceiver, and supporting the main set receiving and the main set MIMO receiving of the second frequency band signals;

The first receiving circuit is respectively connected with the output port and the third antenna port and is used for supporting diversity reception of the first frequency band signal;

the second receiving circuit is respectively connected with the output port and each second MIMO antenna port and is used for supporting diversity reception and diversity MIMO reception of the second frequency band signals; the first receiving circuit and the second receiving circuit are respectively connected to different output ports.

An embodiment of the present application provides a radio frequency system, including: the radio frequency transceiver and the radio frequency front-end device are connected with the input port and the output port of the radio frequency front-end device respectively.

The radio frequency front-end device and the radio frequency system comprise the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit, can simultaneously support double-transmission of the first frequency band signal and the second frequency band signal and double-path reception of the first frequency band signal, can avoid using a plurality of discrete radio frequency modules such as transceiver modules and receiving modules for four-path reception of the second frequency band signal, can realize double-connection (LTE NR Double Connect, ENDC) combination of the 4G-LTE signal and the 5G-NR, and can support 4X 4MIMO function of the second frequency band signal, and can further improve the communication performance of an antenna assembly while improving the integration level, reducing the occupied area, reducing the cost and being beneficial to the miniaturized design of the radio frequency system. Furthermore, by integrating the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit in the radio frequency front-end device, the complexity of power supply and radio frequency wiring is reduced, the complexity of single board layout is reduced, and meanwhile, the insertion loss is reduced so as to improve the communication performance of the device.

Drawings

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

FIGS. 1-12 are block diagrams of the structure of RF front-end devices in various embodiments;

FIG. 13 is one of the block diagrams of the architecture of the RF system in one embodiment;

FIG. 14 is a second block diagram of an RF system in one embodiment;

FIG. 15 is a third block diagram of an RF system in one embodiment;

Fig. 16 is a block diagram of a radio frequency system in one embodiment.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, and the preferred embodiments of the present application are presented in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, so that the application is not limited to the specific embodiments disclosed below.

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

In one embodiment, as shown in fig. 1, the present application provides a radio frequency front end device. The radio frequency front end device is configured with a first antenna port ANT1, a second antenna port ANT2, a third antenna port ANT3, a fourth antenna port ANT4, at least one first MIMO antenna port MIMO ANT1 and at least one second MIMO antenna port MIMO ANT2 for connection with an antenna, and a first input port LB RFIN, a second input port MHB RFIN and a plurality of output ports LNAOUT for connection with a radio frequency transceiver. The radio frequency front-end device can be understood as a low-frequency power amplifier module (Power amplifier Module integrated Duplexer With LNA, L-PA MID) with built-in low noise amplifier, namely an L-PA MID device. The rf front-end device may be understood as an rf chip, wherein each port provided by the rf front-end device may be understood as a terminal of the rf chip for connection with an external device, such as an antenna, an rf transceiver, etc.

The radio frequency front-end device has integrated therein a first transceiver circuit 10, a second transceiver circuit 20, a first receiver circuit 30 and a second receiver circuit 40. The first transceiver circuit 10 is connected to the first input port LB RFIN, the output port LNAOUT, and the first antenna port ANT1, and is configured to support transmission of a first frequency band signal from the radio frequency transceiver and support reception of a main set of the first frequency band signal from the antenna. The second transceiver circuit 20 is connected to the second input port MHB RFIN, the output port LNAOUT, the second antenna port ANT2, and each of the first MIMO antenna ports MIMO ANT1, and is configured to support transmission of the second frequency band signal from the radio frequency transceiver, and support reception of the second frequency band signal from the antenna in the main set and reception of the main set in the MIMO. The second transceiver circuit 20 may support transmission of the second frequency band signal, and may also support main set reception and main set MIMO reception of the second frequency band signal, that is, the second transceiver circuit 20 may support reception of two paths of the second frequency band signal at the same time. The first receiving circuit 30 is connected to the output port LNAOUT and the third antenna port, respectively, and is configured to support diversity reception of the first frequency band signal from the antenna. The second receiving circuit 40 is connected to the output port LNAOUT and each of the second MIMO antenna ports MIMO ANT2, respectively, and supports diversity reception and diversity MIMO reception of the second band signals from the antennas. That is, the second receiving circuit 40 can support the reception of two second frequency band signals at the same time. The first transceiver circuit 10, the second transceiver circuit 20, the first receiving circuit 30 and the second receiving circuit 40 are respectively connected to different output ports LNAOUT.

In the embodiment of the present application, the first frequency band signal and the second frequency band signal are different, and the frequency range covered by the first frequency band signal is different from the frequency range covered by the second frequency band signal.

The first frequency band signal comprises a plurality of low frequency signals, and the frequency range of each first low frequency signal is different. The low frequency signals may include radio frequency signals of all low frequency bands of 4G long term evolution (Long Term Evolution, LTE) and 5G NR, and may include signals of frequency bands such as LTE-8/12/17/20/26/28/29 and radio frequency signals of frequency bands such as NR-28A, for example. The second frequency band signal comprises a plurality of intermediate frequency signals and/or a plurality of high frequency signals, and the frequency ranges of the intermediate frequency signals and the high frequency signals are different. The intermediate frequency signal and the high frequency signal may include radio frequency signals of all intermediate and high frequency bands of 4G LTE and 5G NR, and may include signals of LTE-1/3/7/25/32/34/39/40/41 frequency bands and radio frequency signals of NR-1/3/7/40/41 and other frequency bands by way of example.

The radio frequency front-end device comprises the first transceiver circuit 10, the second transceiver circuit 20, the first receiving circuit 30 and the second receiving circuit 40, can simultaneously support dual-transmission of the first frequency band signal and the second frequency band signal, and dual-path reception of the first frequency band signal, and can avoid using a plurality of discrete radio frequency modules, such as transceiver modules, receiving modules and the like, so as to realize dual-connection (LTE NR Double Connect, ENDC) combination of the 4G-LTE signal and the 5G-NR, and support 4 x 4mimo function of the second frequency band signal, thereby improving the integration level, reducing the occupied area, reducing the cost, being beneficial to miniaturization design of a radio frequency system, and further improving the communication performance of an antenna assembly. Further, by integrating the first transceiver circuit 10, the second transceiver circuit 20, the first receiver circuit 30 and the second receiver circuit 40 in the rf front-end device, the complexity of power supply and rf routing is reduced, the complexity of board layout is reduced, and at the same time, the insertion loss is reduced to improve the communication performance of the device.

As shown in fig. 2, in one embodiment, the first transceiver circuit 10 includes a first transmit amplifying unit 110, a first receive amplifying unit 120, and a first switching unit 130. The first switch unit 130, the first ends of the first switch unit 130 are respectively connected to the output end of the first transmit amplifying unit 110 and the input end of the first receive amplifying unit, and the second end of the first switch unit 130 is connected to the first antenna port ANT1, so as to conduct the paths between the first transmit amplifying unit 110 and the first receive amplifying unit and the first antenna port ANT1 in a time-sharing manner. The input end of the first transmission amplifying unit 110 is connected to the first input port LB RFIN, and the output end of the first transmission amplifying unit 110 is connected to the first antenna port ANT1 through the first switch unit 130. The first transmit amplifying unit 110 may perform power amplification processing on the first frequency band signal from the radio frequency transceiver, and transmit the amplified first frequency band signal to the first antenna port ANT1 through the first switch unit 130, so as to implement transmit processing on the first frequency band signal.

As shown in fig. 3, the first transceiver circuit 10 may further include a first filter circuit 140, configured to perform a filtering process on the power amplified signal in the first frequency band, and transmit the filtered signal to the first antenna port ANT1 through the first switch unit 130. The first filter circuit 140 may further include a plurality of low-frequency filters, the first transmitting amplifying unit 110 may include a low-frequency power amplifier and a first switch, wherein an input end of the low-frequency power amplifier is connected to the first input port LB RFIN, an output end of the low-frequency power amplifier is connected to a first end of the first switch, a plurality of second ends of the first switch are respectively connected to first ends of the plurality of low-frequency filters in a one-to-one correspondence manner, a second end of the plurality of low-frequency filters is respectively connected to a plurality of first ends of the first switch unit 130 in a correspondence manner, and frequency bands of low-frequency signals output by the low-frequency filters are different from each other. By controlling the on state of the first switch and the first switching unit 130, transmission processing of any low frequency signal can be realized.

With continued reference to fig. 3, the first transceiver circuit 10 may further include a first coupling unit 150 disposed between the second end of the first switch unit 130 and the first antenna port ANT1, for coupling the first frequency band signal on the transmit link to output a corresponding coupling signal to the radio frequency transceiver, so as to implement power detection of the first frequency band signal.

The input port of the first receiving and amplifying unit 120 receives the first frequency band signal from the first antenna port ANT1 through the first switch unit 130, and the output end of the first receiving and amplifying unit 120 is connected to the output port LNAOUT, so as to perform low noise amplification processing on the received first frequency band signal, and the first frequency band signal after the low noise amplification processing is transmitted to the radio frequency transceiver through the output port LNAOUT, so as to implement main set receiving processing on the first frequency band signal.

Optionally, the first transceiver circuit 10 may further include a second filter circuit 160, configured to perform filtering processing on the first frequency band signal received by the first antenna port ANT1, and transmit the filtered signal to the first receiving and amplifying unit 120 for amplifying processing, so as to transmit the filtered signal to the radio frequency transceiver via the different output ports LNAOUT. For example, the second filter circuit 160 may further include a plurality of second filters, and the first receiving and amplifying unit 120 may include at least one first low noise amplifier and at least one second switch, wherein the number of the first low noise amplifiers and the number of the second switches may be the same. The output end of each first low noise amplifier is connected to different output ports LNAOUT, the input end of each first low noise amplifier is connected to the first end of the second switch, the second ends of the second switches are respectively connected to the first ends of the second filters in a one-to-one correspondence manner, the second ends of the second filters are respectively connected to the first ends of the first switch unit 130 in a corresponding manner, and the frequency bands of the low frequency signals output by the second filters are different. In the embodiment of the present application, the first switch unit 130 may be a single pole multiple throw switch, and may be an SP10T switch

By controlling the on states of the second switch and the first switch unit 130, reception processing of any low frequency signal can be achieved.

With continued reference to fig. 2, in one embodiment, the second transceiver circuit 20 includes a second transmit amplifying unit 210, a second receive amplifying unit 220, a second switch unit 230, and a first sub-receive circuit 240. The first ends of the second switch unit 230 are respectively connected to the first transmit amplifier unit 110, the second transmit amplifier unit 210, the first receive amplifier unit 120, and the second receive amplifier unit 220, and a second end of the first switch unit 130 is connected to the second antenna port ANT2, so as to conduct paths between the second transmit amplifier unit 210 and the second receive amplifier unit 220 and the second antenna port ANT2 in a time-sharing manner. The input end of the second transmit amplifying unit 210 is connected to the second input port MHB RFIN, and the output end of the second transmit amplifying unit 210 is connected to the second antenna port ANT2 through the second switching unit 230. The second transmitting and amplifying unit 210 may perform power amplification processing on the second frequency band signal from the radio frequency transceiver, and transmit the amplified second frequency band signal to the second antenna port ANT2 through the second switch unit 230, so as to implement transmitting processing on the second frequency band signal.

With continued reference to fig. 3, the second transceiver circuit 20 may further include a third filter circuit 250, configured to perform a filtering process on the second frequency band signal after the power amplification process, and transmit the filtered signal to the second antenna port ANT2 through the second switch unit 230. The third filter circuit 250 may further include a plurality of intermediate frequency filters and a plurality of high frequency filters, where the intermediate frequency filters only allow the intermediate frequency signals of the preset frequency band to pass, the high frequency filters only allow the high frequency signals of the preset frequency band to pass, and the frequency bands of the signals output by the intermediate frequency filters and the high frequency filters are different from each other. The second transmission amplifying unit 210 may include an intermediate frequency power amplifier, a high frequency power amplifier, and a plurality of third switches. The second input port MHB RFIN may include an intermediate frequency input port for receiving an intermediate frequency signal and a high frequency input port for receiving an intermediate frequency signal, wherein input ends of the intermediate frequency power amplifier and the high frequency amplifier may be respectively connected to the intermediate frequency input port and the high frequency input port to support power amplification processing of the intermediate frequency signal and the high frequency signal, respectively. The output end of the intermediate frequency power amplifier is connected to a first end of a third switch, and a plurality of second ends of the third switch are respectively connected to a plurality of first ends of the intermediate frequency filters, and a plurality of second ends of the intermediate frequency filters are respectively connected to a plurality of first ends of the first switch unit 130. The output terminal of the high frequency power amplifier is connected to a first terminal of another third switch, and a plurality of second terminals of the third switch are respectively connected to a plurality of first terminals of the high frequency filters, and a plurality of second terminals of the high frequency filters are respectively connected to a plurality of first terminals of the first switch unit 130. By controlling the on state of the third switch and the second switch unit 230, it is possible to implement transmission processing of any intermediate frequency signal, high frequency.

With continued reference to fig. 3, alternatively, the rf front-end device may be configured with two second antenna ports ANT2, and the second switch unit 230 may include two first ends, where the two first ends of the second switch unit 230 are respectively connected to the two second antenna ports ANT2 in a one-to-one correspondence. The second transceiver circuit 20 may further include a second coupling unit 260 and a third coupling unit 270, where the second coupling unit 260 may be disposed on the first mid-high frequency transmission link between a second end of the second switch unit 230 and a second antenna port ANT2, and configured to couple the second frequency band signal on the first mid-high frequency transmission link to output a corresponding coupling signal to the radio frequency transceiver, so as to implement power detection of the second frequency band signal. The third coupling unit 270 may be disposed on a second mid-high frequency transmission link between the other second end of the second switch unit 230 and the other second antenna port ANT2, and configured to couple a second frequency band signal on the second mid-high frequency transmission link, so as to output a corresponding coupling signal to the radio frequency transceiver, so as to implement power detection of the second frequency band signal.

The input port of the second receiving and amplifying unit 220 receives the second frequency band signal from the second antenna port ANT2 through the second switch unit 230, and the output end of the second receiving and amplifying unit 220 is connected to the output port LNAOUT, so as to perform low noise amplification processing on the received second frequency band signal, and the second frequency band signal after the low noise amplification processing is transmitted to the radio frequency transceiver through the output port LNAOUT, so as to implement main set receiving processing on the second frequency band signal.

With continued reference to fig. 3, the second transceiver circuit 20 may further include a fourth filter circuit 280, configured to perform filtering processing on the second frequency band signal received by the second antenna port ANT2, and transmit the filtered signal to the second receiving and amplifying unit 220 for amplifying processing, so as to transmit the filtered signal to the radio frequency transceiver through the different output ports LNAOUT. The fourth filter circuit 280 may include a plurality of intermediate frequency filters and a plurality of high frequency filters, and the second receiving amplifying unit 220 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier, and a plurality of fourth switches. Wherein the sum of the number of intermediate frequency, high frequency low noise amplifiers and the number of fourth switches may be the same. The input end of each intermediate frequency low noise amplifier is connected with the first end of a fourth switch, the second ends of the fourth switch are respectively connected with the first ends of a plurality of intermediate frequency filters in a one-to-one correspondence manner, the second ends of the plurality of intermediate frequency filters are respectively connected with the first ends of the second switch unit 230, and the frequency bands of the low frequency signals output by the intermediate frequency filters are different. The input end of each high-frequency low-noise amplifier is connected with the first end of another fourth switch, the second ends of the other fourth switch are respectively connected with the first ends of a plurality of high-frequency filters in a one-to-one correspondence manner, the second ends of the plurality of high-frequency filters are respectively connected with the first ends of the second switch unit 230, and the frequency bands of low-frequency signals output by the high-frequency filters are different. The outputs of each of the mid and high frequency low noise amplifiers are connected to different output ports LNAOUT. In the embodiment of the present application, the second switch unit 230 may be a single pole multi-throw switch or a double pole multi-branch switch. The second switching unit 230 may be an SP7T switch or a DP7T switch, for example.

The input end of the first sub-receiving circuit 240 is connected to at least one first MIMO antenna port MIMO ANT1, and the output end of the first sub-receiving circuit 240 is connected to an output port LNAOUT, so as to perform low noise amplification processing on the received second frequency band signal, so as to support main set MIMO receiving on the second frequency band signal, where each low noise amplifier in the second receiving amplifying unit 220 and the output end of the first sub-receiving circuit 240 are respectively connected to different output ports LNAOUT.

In the embodiment of the present application, the second transceiver circuit 20 may support transmission of the second frequency band signal and support main set reception and main set MIMO reception of the second frequency band signal, specifically, by controlling the on states of the third switch, the fourth switch and the second switch unit 230, the transmission processing and the main set reception of any intermediate frequency signal and high frequency signal may be implemented, and by setting the second sub-receiving circuit, the main set MIMO reception of any intermediate frequency signal and high frequency signal may be implemented.

As shown in fig. 4, in one embodiment, the radio frequency front end device is configured with a plurality of first MIMO antenna ports MIMO ANT1. The plurality of first MIMO antenna ports MIMO ANT1 may be connected to antennas through an external filtering module. The first sub-receiving circuit includes: the third reception amplifying unit 241. The input end of the third receiving and amplifying unit 241 is respectively connected to the plurality of first MIMO antenna ports MIMO ANT1, and the output end of the third receiving and amplifying unit 241 is respectively connected to the plurality of output ports LNAOUT, so as to perform low noise amplification processing on the received second frequency band signal. The third receiving amplifying unit 241 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier, and a plurality of fifth switches. Wherein the sum of the number of intermediate frequency, high frequency low noise amplifiers and the number of fifth switches may be the same. The input ends of the intermediate frequency and high frequency low noise amplifiers are respectively connected with the first ends of different fifth switches, the second ends of the fifth switches are respectively and correspondingly connected with a plurality of first MIMO antenna ports MIMO ANT1, and the output ends of the intermediate frequency and high frequency low noise amplifiers are connected to different output ports LNAOUT.

In the embodiment of the present application, by setting the third receiving and amplifying unit 241 and controlling the on state of the fourth switch, the main set MIMO receiving of any intermediate frequency signal and high frequency signal can be realized.

As shown in fig. 5, in one embodiment, the rf front-end device is configured with a first MIMO antenna port MIMO ANT1, and the first sub-receiving circuit 240 includes: a third receiving amplifying unit 241, a third switching unit 242, and a plurality of first filtering units 243. The multiple input ends of the third receiving and amplifying unit 241 are respectively connected to the first ends of the multiple first filtering units 243, and the output ends of the third receiving and amplifying unit 241 are respectively connected to the multiple output ports LNAOUT, so as to perform low noise amplification processing on the received second frequency band signal. Specifically, the third receiving and amplifying unit 241 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier, and a plurality of fifth switches. The input ends of the intermediate frequency and high frequency low noise amplifiers are respectively connected with the first ends of the different fifth switches, and the output ends of the intermediate frequency and high frequency low noise amplifiers are connected to different output ports LNAOUT. The second ends of the fifth switch are respectively connected to the first ends of the first filtering units 243 as the input ends of the third receiving and amplifying unit 241. The second ends of the plurality of first filtering units 243 are respectively connected with part of the first ends of the third switching units 242 in a one-to-one correspondence manner, and the second ends of the third switching units 242 are connected with the first MIMO antenna port MIMO ANT 1; the frequency ranges of the signals output by the respective first filtering units 243 are different. The first filtering unit 243 may include a plurality of intermediate frequency filters and a plurality of high frequency filters, each intermediate frequency filter only allows the intermediate frequency signal of the preset frequency band to pass through, and each output intermediate frequency signal has a different frequency band, each high frequency filter only allows the high frequency signal of the preset frequency band to pass through, and each output high frequency signal has a different frequency band.

In this embodiment, the external filtering module disposed in the rf front-end device may be built in the rf front-end device, and meanwhile, the configuration of the first MIMO antenna port MIMO ANT1 may be reduced, so that the integration level of the rf front-end device may be further improved, and the cost and the configuration of the port of the rf front-end device may be reduced.

As shown in fig. 6, the radio frequency front end device in the present embodiment may be replaced with one first switching device 101 by two independent switching devices of the first switching unit and the second switching unit, that is, the first switching unit and the second switching unit are integrated as the first switching device 101, compared to the radio frequency front end device in the foregoing embodiment. For example, if the first switching unit is an SP10T switch, the second switching unit is an SP7T switch or a DP7T switch, and in this embodiment, the first switching device 101 may be a DP17T switch. The first ends of the first switching device 101 are connected to the first transmit amplifying unit 110, the second transmit amplifying unit 210, the first receive amplifying unit 120, and the second receive amplifying unit 220, respectively, and the two second ends of the first switching device 101 are connected to the first antenna port ANT1 and the second antenna port ANT2, respectively.

In the embodiment of the present application, by providing the first switching device 101, compared with the foregoing embodiment in which the first switching unit 130 and the second switching unit 230 are independent, the cost can be reduced, and the control logic of on-off control of the switch can be simplified, so as to implement rapid switching of the transmission of the first frequency band signal and the second frequency band signal, and the main set reception, and improve the communication performance.

With continued reference to fig. 6, when the rf front-end device includes the first switching device 101, the rf front-end device may include only two coupling units, and may include, for example, a fourth coupling unit 102 and a fifth coupling unit 103. The fourth coupling unit 102 may be disposed on the first transmission link between a second end of the first switching device 101 and the first antenna port ANT1, and configured to couple the first frequency band signal on the first transmission link, so as to output a corresponding coupling signal to the radio frequency transceiver, so as to implement power detection of the first frequency band signal. The fifth coupling unit 103 may be disposed on a second transmission link between the other second end of the first switching device 101 and the second antenna port ANT2, and configured to couple a second frequency band signal on the second transmission link, so as to output a corresponding coupling signal to the radio frequency transceiver, so as to implement power detection of the second frequency band signal.

In this embodiment, by providing the first switching device 101, only two coupling units of the fourth and fifth coupling units 103 need to be correspondingly provided, which can reduce the cost of the coupling units, save the occupied area, and facilitate the miniaturization design of the device, compared with the three coupling units provided in the foregoing embodiment.

As shown IN fig. 7, IN one embodiment, the radio frequency front end device is further configured with a third input port 2G HB IN. Wherein, radio frequency front-end device still includes: the first transmitting circuit 50 is configured to support transmission of a third frequency band signal from the radio frequency transceiver, where a communication system of the third frequency band signal is different from a communication system of the second frequency band. The third frequency band signal may be a 2G high frequency signal. The third input port 2G HB IN may also be referred to as a 2G high frequency port. An input terminal of the first transmitting circuit 50 is connected to the third input port 2G HB IN, and an output terminal of the first transmitting circuit 50 is connected to another first terminal of the second switching unit 230.

In this embodiment, under the condition that no additional antenna port needs to be added, the first transmitting circuit 50 can be switched to the first antenna port ANT1 through the first switch unit 130 to realize the transmission of the 2G high-frequency signal, so that the configuration of one 2G high-frequency antenna port can be reduced, the cost can be reduced, and meanwhile, the communication frequency band of the radio frequency front-end device can be further expanded, so that the transmission performance of the radio frequency front-end device can be further improved.

With continued reference to fig. 7, optionally, the rf front-end device may further be configured with a 2G low-frequency port 2G LB IN connected to the rf transceiver, and further include a 2G low-frequency transmitting circuit 60 connected to the first switch unit 130 and the 2G low-frequency port 2G LB IN, respectively, to support transmission processing of the 2G low-frequency signal.

In this embodiment, under the condition that no additional antenna port is required to be added, the 2G low frequency transmitting circuit 60 can be switched to the first antenna port ANT1 through the first switch unit 130 to realize the transmission of the 2G low frequency signal, so that the communication frequency band of the radio frequency front end device can be further expanded, and the transmission performance of the radio frequency front end device can be further improved.

As shown in fig. 8, in one embodiment, the first receiving circuit 30 includes: the fourth receiving and amplifying unit 310, the fourth switching unit 320, and the plurality of third filtering units 330, wherein the frequency ranges of the low frequency signals outputted from the respective third filtering units 330 are different. The third filtering units 330 may include low frequency filters, which allow low frequency signals of a predetermined frequency band to pass through, and the frequency bands of the signals output from the respective third filtering units 330 are different. The second ends of the third filter units 330 are respectively connected to the first ends of the fourth switch units 320, the second ends of the fourth switch units 320 are connected to the third antenna port ANT3, and the fourth switch units 320 are configured to selectively turn on a path between any one of the third filter units 330 and the third antenna port ANT 3.

The first ends of the fourth receiving and amplifying unit 310 are respectively connected to the first ends of the third filtering units 330, and the output end of the fourth receiving and amplifying unit 310 is connected to the output port LNAOUT, so as to perform low-noise amplification processing on the received first frequency band signal. Specifically, the fourth receiving and amplifying unit 310 may include at least one low-frequency low-noise amplifier and at least one sixth switch, wherein the number of low-noise amplifiers is equal to the number of sixth switches. The input end of each low-frequency low-noise amplifier is connected with the first end of each sixth switch, and the output end of each low-frequency low-noise amplifier is connected to a different output port LNAOUT. The second ends of the sixth switches are respectively connected to the first ends of the third filter units 330 as the input ends of the fourth receiving and amplifying unit 310. The second ends of the third filter units 330 are respectively connected to the first ends of the fourth switch units 320 in a one-to-one correspondence manner, and the second ends of the fourth switch units 320 are connected to the third antenna port ANT 3. In an embodiment of the present application, both the sixth switch and the fourth switch unit 320 may be single pole, multi-throw switches. The fourth switching unit 320 may be an SP6T switch, for example.

In this embodiment, the first receiving circuit 30 may support diversity reception of the first frequency band signal, specifically, by controlling the on states of the sixth switch and the fourth switch unit 320, diversity reception of any low frequency signal may be achieved.

With continued reference to fig. 8, in one embodiment, the second receiving circuit 40 includes: the second sub-receiving circuit 410, the fifth receiving amplifying unit 420, the fifth switching unit 430, and the plurality of fourth filtering units 440. The fourth filtering unit 440 may include one of an intermediate frequency filter and a high frequency filter. Wherein the frequency ranges of the intermediate frequency or high frequency signals outputted from the respective fourth filtering units 440 are different. Illustratively, the intermediate frequency filter allows the intermediate frequency signal of the preset frequency band to pass therethrough, and the high frequency filter allows the intermediate frequency signal of the preset frequency band to pass therethrough, and the frequency bands of the signals output by the fourth filtering units 440 are different from each other. The first ends of the fifth switch unit 430 are correspondingly connected to the second ends of the fourth filter units 440, the second ends of the fifth switch unit 430 are connected to the fourth antenna ports, and the fifth switch unit 430 is used for selectively conducting the path between any one of the fourth filter units 440 and the fourth antenna ports.

The first ends of the fifth receiving and amplifying unit 420 are respectively connected to the first ends of the fourth filtering units 440, and the output end of the fifth receiving and amplifying unit 420 is connected to the output port LNAOUT, so as to perform low noise amplification on the received second frequency band signal. Specifically, the fifth receiving and amplifying unit 420 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier, and a plurality of seventh switches. Wherein the sum of the number of the intermediate frequency and high frequency low noise amplifiers is equal to the number of the seventh switches. The input ends of the intermediate frequency and high frequency low noise amplifiers are respectively connected with the first ends of the seventh switches, and the output ends of the intermediate frequency and high frequency low noise amplifiers are connected to different output ports LNAOUT. The second ends of the seventh switch are respectively connected to the first ends of the fourth filter units 440 as the input ends of the fifth receiving and amplifying unit 420. In an embodiment of the present application, both the seventh switch and the fifth switch unit 430 may be single pole, multi-throw switches. The fifth switching unit 430 may be an SP8T switch, for example.

The input end of the second sub-receiving circuit 410 is connected to at least one second MIMO antenna port MIMO ANT2, and the output end of the second sub-receiving circuit 410 is connected to the output port LNAOUT, so as to perform low noise amplification processing on the received second frequency band signal, so as to support diversity MIMO reception on the second frequency band signal, where each low noise amplifier in the fifth receiving and amplifying unit 420 and the output end of the second sub-receiving circuit 410 are respectively connected to different output ports LNAOUT.

In the embodiment of the present application, the second receiving circuit 40 may support diversity reception and diversity MIMO reception of the second frequency band signal, and specifically, by controlling the on states of the sixth switch, the seventh switch and the fifth switch unit 430, diversity reception and diversity MIMO reception of any one of the intermediate frequency signal and the high frequency signal may be achieved.

As shown in fig. 9, in one embodiment, the rf front-end device is configured with a plurality of second MIMO antenna ports MIMO ANT2, and the plurality of second MIMO antenna ports MIMO ANT2 may be connected to the antennas through an external filtering module. The second sub-receiving circuit includes: and a sixth reception amplifying unit 411. The input end of the sixth receiving and amplifying unit 411 is connected to a plurality of second MIMO antenna ports, and the output end of the sixth receiving and amplifying unit 411 is connected to a plurality of output ports LNAOUT, respectively, for performing low noise amplification processing on the received second frequency band signal, so as to support diversity MIMO reception on the second frequency band signal. Illustratively, the sixth receive amplification unit 411 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier, and a plurality of eighth switches. Wherein the sum of the number of intermediate frequency, high frequency low noise amplifiers and the number of eighth switches may be the same. The input ends of the intermediate frequency and high frequency low noise amplifiers are respectively connected with the first ends of the eighth switches, the second ends of the eighth switches are respectively and correspondingly connected with the second MIMO antenna ports MIMO ANT2, and the output ends of the intermediate frequency and high frequency low noise amplifiers are connected to the different output ports LNAOUT.

In the embodiment of the present application, by providing the sixth receiving and amplifying unit 411 and controlling the on state of the eighth switch, diversity MIMO receiving of any one of the intermediate frequency signal and the high frequency signal can be achieved.

As shown in fig. 10, in one embodiment, the radio frequency front end device is configured with a second MIMO antenna port MIMO ANT2, and the second sub-receiving circuit includes: a sixth receiving amplifying unit 411, a sixth switching unit 412, and a plurality of fifth filtering units 413. The multiple input ends of the sixth receiving and amplifying unit 411 are respectively connected to the first ends of the multiple fifth filtering units 413, and the output ends of the sixth receiving and amplifying unit 411 are respectively connected to the multiple output ports LNAOUT, so as to perform low noise amplification processing on the received second frequency band signals. Specifically, the sixth receiving and amplifying unit 411 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier, and a plurality of fifth switches. The input ends of the intermediate frequency and high frequency low noise amplifiers are respectively connected with the first ends of the different eighth switches, and the output ends of the intermediate frequency and high frequency low noise amplifiers are connected to different output ports LNAOUT. The second ends of the eighth switches are connected to the first ends of the fifth filter units 413 as the input ends of the third receiving and amplifying unit 241, respectively. The outputs of each of the mid and high frequency low noise amplifiers are connected to different output ports LNAOUT. Second ends of the plurality of fifth filtering units 413 are respectively connected with part of first ends of the sixth switching units 412 correspondingly, and second ends of the sixth switching units 412 are connected with the second MIMO antenna ports MIMO ANT 2; the second frequency band signal includes a plurality of intermediate frequency signals and/or a plurality of high frequency signals, and the frequency ranges of the signals output by the fifth filtering units 413 are different. The fifth filtering unit 413 may include intermediate frequency filters, each of which allows only intermediate frequency signals of a preset frequency band to pass therethrough, and each of which outputs different frequency bands, and high frequency filters, each of which allows only high frequency signals of a preset frequency band to pass therethrough, and each of which outputs different frequency bands.

In this embodiment, the external filtering module disposed in the rf front-end device may be built in the rf front-end device, and meanwhile, the configuration of the second MIMO antenna port MIMO ANT2 may be reduced, so that the integration level of the rf front-end device may be further improved, and the cost and the configuration of the port of the rf front-end device may be reduced.

As shown in fig. 11, the rf front-end device in the present embodiment may be replaced with one second switching device 102 for two independent switching devices of the fourth switching unit and the fifth switching unit, that is, the fourth switching unit and the fifth switching unit are integrated as the second switching device 102, as compared with the rf front-end devices in the previous embodiments. For example, if the first switching unit is an SP6T switch and the second switching unit is an SP8T switch, in this embodiment, the second switching device 102 may be a DP13T switch. The first ends of the second switching device 102 are respectively connected to the third filtering units 330 and the fourth filtering units 440 in a one-to-one correspondence manner, and the second ends of the switching device are respectively connected to the third antenna port ANT3 and the fourth antenna port ANT 4.

In the embodiment of the present application, by providing the second switching device 102, compared with the above embodiment, the independent fourth switching unit 320 and fifth switching unit 430 are provided, which can reduce the cost and simplify the control logic of on-off control of the switch, so as to implement fast switching of diversity reception of the first frequency band signal and the second frequency band signal, and improve the communication performance.

As shown in fig. 12, in one embodiment, the first MIMO antenna port MIMO ANT1 is further configured to receive a first frequency band signal, and the radio frequency front-end device further includes: the second filtering unit 245. The first end of the second filtering unit 245 is connected to another first end of the third switching unit 242, and the second end of the second filtering unit 245 is connected to the first receiving and amplifying unit 120, so as to allow a preset signal in the first frequency band signal to pass through, where the first receiving and amplifying unit 120 is configured to perform low noise amplification processing on the preset signal, so as to support main set MIMO receiving on the preset signal. Specifically, the preset signal in the first frequency band signal may be a 5G NR low frequency signal, for example, an N28 signal. The third switching unit 242 may be a single pole multiple throw switch, and a portion of the first switching units 130 may be connected to the plurality of first filtering units 243, and one of the first terminals may be connected to the second filtering unit 245. The second filtering unit 245 allows the first frequency band signal path to output a predetermined signal, for example, an N28 signal. The filtered preset signal may be transmitted to the first receiving and amplifying unit 120, and the first receiving and amplifying unit 120 performs low noise amplification processing on the preset signal, so as to implement main set MIMO receiving on the preset signal. Based on the foregoing description, it can be seen that the first receiving and amplifying unit 120 may also support main set receiving of the first frequency band signal, and the radio frequency front end device in this embodiment may support main set receiving and main set MIMO receiving of the 5G NR low frequency signal, so that the receiving performance of the 5G NR low frequency signal may be improved.

Optionally, with continued reference to fig. 12, the second MIMO antenna port MIMO ANT2 in the present embodiment is further configured to receive a first frequency band signal, and the radio frequency front-end device further includes: and a seventh filtering unit 415. A first end of the seventh filtering unit 415 is connected to another first end of the sixth switching unit 412, and a second end of the seventh filtering unit 415 is connected to the fourth receiving and amplifying unit 310, for allowing a preset signal in the first frequency band signal to pass through. The fourth receiving and amplifying unit 310 is configured to perform low noise amplification processing on the preset signal, so as to support diversity MIMO receiving on the preset signal. Specifically, the preset signal in the first frequency band signal may be a 5G NR low frequency signal, for example, an N28 signal. Illustratively, the sixth switching unit 412 may be a single pole multiple throw switch, where a portion of the first terminals of the sixth switching unit 412 are respectively connected to the plurality of fifth filtering units 413, and one of the first terminals is connected to the second filtering unit 245. The seventh filtering unit 415 allows the first frequency band signal path to output a predetermined signal, for example, an N28 signal. The filtered preset signal may be transmitted to the fourth receiving and amplifying unit 310, and the fourth receiving and amplifying unit 310 performs low noise amplification processing on the preset signal, so as to implement diversity MIMO receiving on the preset signal.

As can be seen from the foregoing description, the fourth receiving and amplifying unit 310 may also support diversity reception of the first frequency band signal, and the rf front-end device in this embodiment may support main set reception, main set MIMO reception, diversity reception, and diversity MIMO reception of the 5G NR low frequency signal, so as to support 4×4MIMO functions, thereby improving the receiving performance of the 5G NR low frequency signal.

As shown in fig. 13, an embodiment of the present application further provides a radio frequency system, which includes a radio frequency transceiver 12 and the radio frequency front end device 11 in any of the foregoing embodiments, where an input port and an output port LNAOUT of the radio frequency front end device 11 are respectively connected to the radio frequency transceiver 12.

The radio frequency system in this embodiment includes the first transceiver circuit 10, the second transceiver circuit 20, the first receiving circuit 30 and the second receiving circuit 40, which can support dual transmission of the first frequency band signal and the second frequency band signal, and dual reception of the first frequency band signal, and four reception of the second frequency band signal, so that multiple discrete radio frequency modules, such as transceiver modules and receiving modules, can be avoided, and thus, the dual connection (LTE NR Double Connect, ENDC) combination of the 4G-LTE signal and the 5G-NR can be realized, and the 4 x 4mimo function of the second frequency band signal can be supported, which can improve the integration level, reduce the occupied area, reduce the cost, and facilitate the miniaturized design of the radio frequency system, and can further improve the communication performance of the antenna assembly. Further, by integrating the first transceiver circuit 10, the second transceiver circuit 20, the first receiver circuit 30 and the second receiver circuit 40 in the rf front-end device 11, the complexity of power supply and rf routing is reduced, the complexity of board layout is reduced, and at the same time, the insertion loss is reduced to improve the communication performance of the device.

As shown in fig. 14, in one embodiment, the radio frequency front-end device 11 is configured with a first MIMO antenna port MIMO ANT1 and a second MIMO antenna port MIMO ANT2. The radio frequency system further comprises: the first combiner 13 and the second combiner 14, wherein two first ends of the first combiner 13 are respectively connected with a first antenna port ANT1 and a second antenna port ANT2, a second end of the first combiner 13 is connected with a first antenna ANT1, two first ends of the second combiner 14 are respectively connected with a third antenna port ANT3 and a fourth antenna port ANT4, a second end of the second combiner 14 is connected with a second antenna ANT2, a first MIMO antenna port MIMO ANT1 configured by the radio frequency front end device 11 is connected with the third antenna ANT3, and a second MIMO antenna port MIMO ANT2 configured by the radio frequency front end device 11 is connected with the fourth antenna ANT 4.

In this embodiment, the external filtering module is built in the rf front-end device 11, so that the integration level of the rf front-end device 11 can be further improved; in addition, by setting the first combiner 13, the second combiner 14 and four antennas, dual connection combination of the 4G-LTE signal and the 5G-NR can be realized, and the 4 x 4mimo function of the second frequency band signal and the 4 x 4mimo function of the preset signal (for example, the N28 frequency band signal) in the first frequency band signal are supported, so that the communication performance of the antenna assembly can be further improved while the integration level is improved, the occupied area is reduced, the cost is reduced, and the miniaturization design of the radio frequency system is facilitated.

As shown in fig. 15, in one of the embodiments, the radio frequency front end device 11 is configured with a plurality of first MIMO antenna ports MIMO ANT1 and a plurality of second MIMO antenna ports MIMO ANT2. The radio frequency system further comprises: the first combiner 13, the second combiner 14, and the first filtering module 15 and the second filtering module 16 for filtering the second frequency band signal, where the first filtering module 15 and the second filtering module 16 can support filtering the intermediate frequency signal and the high frequency signal in different frequency bands. Two first ends of the first combiner 13 are respectively connected with a first antenna Ant1 port Ant1 and a second antenna Ant2 port Ant2, and a second end of the first combiner 13 is connected with the first antenna Ant 1; two first ends of the second combiner 14 are respectively connected with a third antenna Ant3 port Ant3 and a fourth antenna Ant4 port Ant4, and a second end of the second combiner 14 is connected with a second antenna Ant 2; the plurality of first MIMO antenna ports MIMO ANT1 configured by the radio frequency front-end device 11 are respectively connected with the first end of the first filter module 15, and the second end of the first filter module 15 is connected with the third antenna Ant 3; the plurality of second MIMO antenna ports MIMO ANT2 configured by the radio frequency front-end device 11 are respectively connected to the first ends of the second filter modules 16, and the second ends of the second filter modules 16 are connected to the fourth antenna ANT 4.

In this embodiment, by setting the radio frequency front end device 11, the first filtering module 15, the second filtering module 16, the first combiner 13, the second combiner 14 and four antennas, dual connection combination of the 4G-LTE signal and the 5G-NR and support of the 4 x 4mimo function of the second frequency band signal can be achieved, so that the communication performance of the antenna assembly can be further improved while the integration level is improved, the occupied area is reduced, the cost is reduced, and the miniaturization design of the radio frequency system is facilitated.

Optionally, as shown in fig. 16, on the basis of the radio frequency system shown in fig. 15, the radio frequency system further includes: a third combiner 17, a fourth combiner 18, a third filtering module 191 and a fourth filtering module 192. The third filtering module 191 and the fourth filtering module 192 are respectively connected to the rf transceiver 12, and can be used to perform filtering processing on the first frequency band signal. Two first ends of the third combiner 17 are respectively connected to the first filtering module 15 and the third filtering module 191, and a second end of the third combiner 17 is connected to the third antenna Ant 3. The two first ends of the fourth combiner 18 are respectively connected to the second filtering module 16 and the fourth filtering module 192, and the second end of the fourth combiner 18 is connected to the fourth antenna Ant 4.

In this embodiment, by setting the radio frequency front-end device 11, the first filtering module 15, the second filtering module 16, the third filtering module 191, the fourth filtering module 192, the first combiner 13, the second combiner 14, the third combiner 17, the fourth combiner 18 and four antennas, the dual-connection combination of the 4G-LTE signal and the 5G-NR can be realized, the 4 x 4mimo function of the second frequency band signal and the 4 x 4mimo function of the preset signal (for example, the N28 frequency band signal) in the first frequency band signal can be supported, and the communication performance of the antenna assembly can be further improved while the integration level is improved, the occupied area is reduced, the cost is reduced, and the miniaturized design of the radio frequency system is facilitated.

The foregoing examples illustrate only a few embodiments of the application, which are described in 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 several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. The radio frequency front-end device is characterized by being a radio frequency chip; the radio frequency front-end device is configured with a first antenna port, a second antenna port, a third antenna port, a fourth antenna port, at least one first MIMO antenna port, at least one second MIMO antenna port, a first input port, a second input port and a plurality of output ports, wherein the first input port, the second input port and the plurality of output ports are used for being connected with a radio frequency transceiver, and each port configured by the radio frequency front-end device is a terminal of the radio frequency chip and is used for being connected with an external device; wherein, the radio frequency front-end device includes:

The second receiving circuit is respectively connected with the output port and each second MIMO antenna port and is used for supporting diversity reception and diversity MIMO reception of the second frequency band signals; wherein the first transceiver circuit, the second transceiver circuit, the first receiver circuit, and the second receiver circuit are respectively connected to different output ports.

2. The radio frequency front-end device of claim 1, wherein the first transceiver circuit comprises:

the input end of the first transmission amplifying unit is connected with the first input port and is used for carrying out power amplification processing on the received first frequency band signal;

The output end of the first receiving amplifying unit is connected with the output port and is used for carrying out low-noise amplifying treatment on the received first frequency band signal;

And the first ends of the first switch units are respectively connected with the output end of the first transmission amplifying unit and the input end of the first receiving amplifying unit, and the second ends of the first switch units are connected with the first antenna port.

3. The radio frequency front-end device of claim 2, wherein the second transceiver circuit comprises:

the input end of the second transmitting amplifying unit is connected with the second input port and is used for carrying out power amplifying treatment on the received second frequency band signal;

The output end of the second receiving and amplifying unit is connected with the output port and is used for carrying out low-noise amplification processing on the received second frequency band signals so as to support the main set receiving of the second frequency band signals;

The first ends of the second switch units are respectively connected with the first transmitting amplifying unit, the second transmitting amplifying unit, the first receiving amplifying unit and the second receiving amplifying unit, and one second end of the first switch unit is connected with the second antenna port;

The input end of the first sub-receiving circuit is connected with at least one first MIMO antenna port, the output end of the first sub-receiving circuit is connected with the output port, and the first sub-receiving circuit is used for carrying out low noise amplification processing on the received second frequency band signals so as to support the main set MIMO receiving of the second frequency band signals, wherein the output ends of the second receiving amplifying unit and the first sub-receiving circuit are respectively connected to different output ports.

4. The radio frequency front-end device of claim 3, further configured with a third input port:

The input end of the first transmitting circuit is connected with the third input port, the output end of the first transmitting circuit is connected with the other first end of the second switch unit, and the first transmitting circuit is used for supporting the transmission of a third frequency band signal from the radio frequency transceiver, wherein the communication system of the third frequency band signal is different from that of the second frequency band signal.

5. The radio frequency front-end device according to claim 3, wherein the first switching unit and the second switching unit are integrated into a first switching device, wherein a plurality of first ends of the first switching device are respectively connected with the first transmitting amplifying unit, the second transmitting amplifying unit, the first receiving amplifying unit and the second receiving amplifying unit in a one-to-one correspondence manner, and two second ends of the first switching device are respectively connected with the first antenna port and the second antenna port in a one-to-one correspondence manner.

6. The radio frequency front-end device of claim 3, wherein the radio frequency front-end device is configured with a plurality of the first MIMO antenna ports, the first sub-receiving circuit comprising:

The input end of the third receiving and amplifying unit is respectively connected with a plurality of the first MIMO antenna ports, and the output end of the third receiving and amplifying unit is respectively connected with a plurality of the output ports and is used for carrying out low-noise amplification processing on the received second frequency band signals; wherein the second frequency band signal comprises a plurality of intermediate frequency signals and/or a plurality of high frequency signals.

7. The radio frequency front-end device of claim 3, wherein said radio frequency front-end device is configured with one of said first MIMO antenna ports, said first sub-receiving circuit comprising: the first receiving amplifying unit, the first switching unit and the plurality of first filtering units; wherein,

The input ends of the third receiving and amplifying unit are respectively connected with the first ends of the first filtering units, and the output ends of the third receiving and amplifying unit are respectively connected with the output ports and are used for carrying out low-noise amplification processing on the received second frequency band signals;

the second ends of the plurality of first filter units are respectively connected with part of first ends of the third switch units in a one-to-one correspondence manner, and the second ends of the third switch units are connected with the first MIMO antenna ports; the second frequency band signal comprises a plurality of intermediate frequency signals and/or a plurality of high frequency signals, and the frequency ranges of the signals output by the first filtering units are different.

8. The radio frequency front-end device of claim 7, wherein the first MIMO antenna port is further configured to receive a first frequency band signal, the radio frequency front-end device further comprising:

The first end of the second filtering unit is connected with the other first end of the third switch unit, and the second end of the second filtering unit is connected with the first receiving amplifying unit and is used for allowing a preset signal in the first frequency band signal to pass through;

The first receiving and amplifying unit is used for performing low-noise amplification processing on the preset signal so as to support main set MIMO receiving of the preset signal.

9. The radio frequency front-end device according to claim 1, wherein the first frequency band signal comprises a plurality of low frequency signals, each of which has a different frequency range, and the second frequency band signal comprises a plurality of intermediate frequency signals and/or a plurality of high frequency signals, each of which has a different frequency range.

10. The radio frequency front-end device of claim 9, wherein the first receive circuit comprises: a fourth receiving amplifying unit, a fourth switching unit and a plurality of third filtering units, wherein,

The first ends of the fourth receiving and amplifying units are respectively connected with the first ends of the third filtering units, and the output ends of the fourth receiving and amplifying units are connected with the output ports and are used for carrying out low-noise amplification processing on the received first frequency band signals;

The second ends of the third filter units are respectively and correspondingly connected with the first ends of the fourth switch units, and the second ends of the fourth switch units are connected with the third antenna ports; wherein the frequency range of the low-frequency signal output by each third filtering unit is different.

11. The radio frequency front-end device of claim 10, wherein the second receiving circuit comprises: the second sub-receiving circuit, the fifth receiving amplifying unit, the fifth switching unit and the plurality of fourth filtering units;

the first ends of the fifth receiving and amplifying unit are respectively connected with the first ends of the fourth filtering units, and the output end of the fifth receiving and amplifying unit is connected with the output port and is used for carrying out low-noise amplification processing on the received second frequency band signals;

The second ends of the fourth filter units are respectively connected with the first ends of the fifth switch units in a one-to-one correspondence manner, and the second ends of the fifth switch units are connected with the fourth antenna ports; wherein, the frequency range of the signal output by each fourth filtering unit is different;

The input end of the second sub-receiving circuit is connected with at least one second MIMO antenna port, the output end of the second sub-receiving circuit is connected with the output port and is used for carrying out low-noise amplification processing on the received second frequency band signals, and the output ends of the fifth receiving amplifying unit and the second sub-receiving circuit are respectively connected to different output ports.

12. The radio frequency front-end device according to claim 11, wherein the fourth switching unit and the fifth switching unit are integrated into a second switching device, wherein a plurality of first ends of the second switching device are respectively connected with a plurality of third filtering units and a plurality of fourth filtering units in a one-to-one correspondence manner, and two second ends of the switching device are respectively connected with the third antenna port and the fourth antenna port.

13. The radio frequency front-end device of claim 11, wherein the radio frequency front-end device is configured with a plurality of the second MIMO antenna ports, the second sub-receiving circuit comprising:

The input end of the sixth receiving and amplifying unit is respectively connected with a plurality of the second MIMO antenna ports, and the output end of the sixth receiving and amplifying unit is respectively connected with a plurality of the output ports and is used for carrying out low-noise amplification processing on the received second frequency band signals; wherein the second frequency band signal comprises a plurality of intermediate frequency signals and/or a plurality of high frequency signals.

14. The rf front-end device of claim 11, wherein the rf front-end device is configured with one of the second MIMO antenna ports, the second sub-receiving circuit comprising: a sixth receiving amplifying unit, a sixth switching unit and a plurality of fifth filtering units; wherein,

The output end of the sixth receiving and amplifying unit is respectively connected with a plurality of output ports and is used for carrying out low-noise amplification processing on the received second frequency band signals;

the second ends of the fifth filter units are respectively and correspondingly connected with part of the first ends of the sixth switch units, and the second ends of the sixth switch units are connected with the second MIMO antenna ports; the second frequency band signal comprises a plurality of intermediate frequency signals and/or a plurality of high frequency signals, and the frequency ranges of signals output by the fifth filtering units are different.

15. The radio frequency front-end device of claim 14, wherein the second MIMO antenna port is further configured to receive a first frequency band signal, the radio frequency front-end device further comprising:

A seventh filtering unit, wherein a first end of the seventh filtering unit is connected with another first end of the sixth switching unit, and a second end of the seventh filtering unit is connected with the fourth receiving amplifying unit, and is used for allowing a preset signal in the first frequency band signal to pass through;

The fourth receiving and amplifying unit is configured to perform low noise amplification processing on the preset signal, so as to support diversity MIMO receiving on the preset signal.

16. A radio frequency system, comprising: a radio frequency transceiver, and a radio frequency front-end device as claimed in any of claims 1 to 15, wherein the input port and the output port of the radio frequency front-end device are respectively connected to the radio frequency transceiver.

17. The radio frequency system according to claim 16, wherein the radio frequency front-end device is configured with a first MIMO antenna port and a second MIMO antenna port; the radio frequency system further comprises: a first combiner and a second combiner, wherein,

Two first ends of the first combiner are respectively connected with the first antenna port and the second antenna port, and a second end of the first combiner is connected with the first antenna;

Two first ends of the second combiner are respectively connected with the third antenna port and the fourth antenna port, and a second end of the second combiner is connected with a second antenna;

The first MIMO antenna port configured by the radio frequency front-end device is connected with a third antenna;

And a second MIMO antenna port configured by the radio frequency front-end device is connected with a fourth antenna.

18. The radio frequency system of claim 16, wherein the radio frequency front end device is configured with a plurality of first MIMO antenna ports and a plurality of second MIMO antenna ports; the radio frequency system further comprises: the first combiner, the second combiner, and the first filtering module and the second filtering module for filtering the second frequency band signal, wherein,

The multiple first MIMO antenna ports configured by the radio frequency front-end device are respectively connected with the first end of the first filtering module, and the second end of the first filtering module is connected with the third antenna;

the multiple second MIMO antenna ports configured by the radio frequency front-end device are respectively connected with the first end of the second filtering module, and the second end of the second filtering module is connected with the fourth antenna.

19. The radio frequency system of claim 18, further comprising: the third combiner, the fourth combiner and the third filtering module and the fourth filtering module are connected with the radio frequency transceiver and are used for filtering the first frequency band signal; wherein,

Two first ends of the third combiner are respectively connected with the first filtering module and the third filtering module, and a second end of the third combiner is connected with a third antenna;

two first ends of the fourth combiner are respectively connected with the second filtering module and the fourth filtering module, and a second end of the fourth combiner is connected with a fourth antenna.