CN115102557B - RF front-end devices and RF systems - Google Patents

Abstract

The present application provides a radio frequency front-end device and a radio frequency system, wherein the radio frequency front-end device includes: a first transceiver circuit, used to support the transmission of a first frequency band signal from the radio frequency transceiver, and support the main set reception of the first frequency band signal; a second transceiver circuit, used to support the transmission of a second frequency band signal from the radio frequency transceiver, and support the main set reception and main set MIMO reception of the second frequency band signal; a first receiving circuit, used to support diversity reception of the first frequency band signal; a second receiving circuit, used to support diversity reception and diversity MIMO reception of the second frequency band signal, which can realize the dual connection combination of 4G‑LTE signal and 5G‑NR, and support the 4*4 MIMO function of the second frequency band signal, which can improve the integration, reduce the occupied area, reduce the cost and facilitate the miniaturization design of the radio frequency system while also improving the communication performance.

Description

RF front-end devices and RF systems

Technical Field

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

Background technique

With the development and progress of technology, mobile communication technology has gradually begun to be applied to communication equipment. For communication equipment that supports 5G communication technology, in the non-standalone (NSA) mode, it is necessary to meet the requirements of 4G signals (for example, B8 band) and 5G signals (for example, N41 band) working together.

However, in the related technologies of the 4-antenna architecture RF system, the RF system usually uses multiple discrete modules, such as multiple discrete transceiver modules and multiple discrete receiving modules to support dual connections of 4G signals and 5G signals, which is costly and occupies a large space.

Summary of the invention

The embodiments of the present application provide a radio frequency front-end device and a radio frequency system, which can realize a dual-connection combination of 4G-LTE signals and 5G-NR, and support a 4*4 MIMO function for a second frequency band signal, thereby improving the integration, reducing the occupied area, reducing the cost and facilitating the miniaturization design of the radio frequency system while also improving the communication performance.

An embodiment of the present application provides a radio frequency front-end device, wherein 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 and at least one second MIMO antenna port, and a first input port, a second input port and a plurality of output ports for connecting to a radio frequency transceiver, wherein the radio frequency front-end device includes:

a first transceiver circuit, connected to the first input port, the output port, and the first antenna port, respectively, for supporting transmission of a first frequency band signal from the radio frequency transceiver, and supporting reception of a main set of the first frequency band signal;

a second transceiver circuit, connected to the second input port, the output port, the second antenna port, and each of the first MIMO antenna ports, respectively, for supporting transmission of a second frequency band signal from the radio frequency transceiver, and supporting main set reception and main set MIMO reception of the second frequency band signal;

a first receiving circuit, connected to the output port and the third antenna port respectively, and configured to support diversity reception of the first frequency band signal;

The second receiving circuit is respectively connected to the output port and each of the second MIMO antenna ports, and is used to support diversity reception and diversity MIMO reception of the second frequency band signal; wherein the first transceiver circuit, the second transceiver circuit, 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: a radio frequency transceiver, and the aforementioned radio frequency front-end device, wherein an input port and an output port of the radio frequency front-end device are respectively connected to the radio frequency transceiver.

The above-mentioned RF front-end device and RF system, including the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit, can simultaneously support dual transmission of the first frequency band signal and the second frequency band signal, as well as dual-channel reception of the first frequency band signal, and four-channel reception of the second frequency band signal, which can avoid the use of multiple discrete RF modules, such as transceiver modules, receiving modules, etc., and can realize the dual connection (LTE NR DoubleConnect, ENDC) combination of 4G-LTE signal and 5G-NR, and support the 4*4MIMO function of the second frequency band signal, which can improve the integration, reduce the occupied area, reduce the cost and facilitate the miniaturization design of the RF system, and further improve the communication performance of the antenna assembly. Furthermore, by integrating the first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit in the RF front-end device, while reducing the complexity of power supply and RF routing, reducing the complexity of single-board layout, it can also reduce insertion loss to improve the communication performance of the device.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

1-12 are structural block diagrams of RF front-end devices in various embodiments;

FIG13 is a block diagram of a radio frequency system according to an embodiment;

FIG14 is a second structural block diagram of a radio frequency system in one embodiment;

FIG15 is a third structural block diagram of a radio frequency system in one embodiment;

FIG. 16 is a fourth structural block diagram of a radio frequency system in an embodiment.

Detailed ways

In order to facilitate the understanding of the present application, in order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application, and the preferred embodiments of the present application are given in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly understood. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

The RF front-end device and RF system involved in the embodiments of the present application can be applied to communication devices with wireless communication functions, and the communication devices can be handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), etc. For the convenience of description, the above-mentioned devices are collectively referred to as communication devices.

In one embodiment, as shown in FIG1 , 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 MIMOANT2 for connecting to an antenna, and a first input port LB RFIN, a second input port MHB RFIN and a plurality of output ports LNAOUT for connecting to a radio frequency transceiver. Among them, the radio frequency front-end device can be understood as a low-frequency power amplifier module with a built-in low noise amplifier (Power amplifier Module integrated Duplexer With LNA, L-PA MID), referred to as an L-PA MID device. The radio frequency front-end device can be understood as a radio frequency chip, wherein the various ports provided in the radio frequency front-end device can be understood as terminals of the radio frequency chip, for connecting to external devices, for example, radio frequency devices such as antennas and radio frequency transceivers.

The RF front-end device integrates a first transceiver circuit 10, a second transceiver circuit 20, a first receiving circuit 30 and a second receiving circuit 40. The first transceiver circuit 10 is respectively connected to the first input port LB RFIN, the output port LNAOUT and the first antenna port ANT1, and is used to support the transmission of the first frequency band signal from the RF transceiver, and to support the main set reception of the first frequency band signal from the antenna. The second transceiver circuit 20 is respectively connected to the second input port MHB RFIN, the output port LNAOUT, the second antenna port ANT2 and each first MIMO antenna port MIMO ANT1, and is used to support the transmission of the second frequency band signal from the RF transceiver, and to support the main set reception and main set MIMO reception of the second frequency band signal from the antenna. The second transceiver circuit 20 can support the transmission of the second frequency band signal, and can also support the main set reception and main set MIMO reception of the second frequency band signal, that is, the second transceiver circuit 20 can simultaneously support the reception of two second frequency band signals. The first receiving circuit 30 is connected to the output port LNAOUT and the third antenna port, respectively, 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 second MIMO antenna port MIMO ANT2, respectively, to support diversity reception and diversity MIMO reception of the second frequency band signal from the antenna. That is, the second receiving circuit 40 can simultaneously support the reception of two second frequency band signals. Among them, 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. Exemplarily, 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 includes a plurality of low-frequency signals, and the frequency ranges of each first low-frequency signal are different. The low-frequency signal may include radio frequency signals of all low-frequency bands of 4G Long Term Evolution (LTE) and 5G NR. For example, it 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. 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 each intermediate frequency signal and each high-frequency signal 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. For example, it may include signals of frequency bands such as LTE-1/3/7/25/32/34/39/40/41 and radio frequency signals of frequency bands such as NR-1/3/7/40/41.

The above-mentioned RF front-end device, including 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, as well as dual-channel reception of the first frequency band signal, and four-channel reception of the second frequency band signal, which can avoid the use of multiple discrete RF modules, such as transceiver modules, receiving modules, etc., and can realize the dual connection (LTE NR DoubleConnect, ENDC) combination of 4G-LTE signals and 5G-NR, and support the 4*4MIMO function of the second frequency band signal, which can improve the integration, reduce the occupied area, reduce the cost and facilitate the miniaturization design of the RF system, and further improve the communication performance of the antenna assembly. Furthermore, by integrating the first transceiver circuit 10, the second transceiver circuit 20, the first receiving circuit 30 and the second receiving circuit 40 in the RF front-end device, while reducing the complexity of power supply and RF routing, reducing the complexity of single-board layout, it can also reduce insertion loss to improve the communication performance of the device.

As shown in FIG2 , in one embodiment, the first transceiver circuit 10 includes a first transmitting amplifying unit 110, a first receiving amplifying unit 120 and a first switching unit 130. The first switching unit 130 has multiple first ends connected to the output end of the first transmitting amplifying unit 110 and the input end of the first receiving amplifying unit, respectively, and the second end of the first switching unit 130 is connected to the first antenna port ANT1, for time-sharing conduction of the paths between the first transmitting amplifying unit 110 and the first receiving amplifying unit and the first antenna port ANT1, respectively. The input end of the first transmitting amplifying unit 110 is connected to the first input port LB RFIN, and the output end of the first transmitting amplifying unit 110 is connected to the first antenna port ANT1 via the first switching unit 130. The first transmitting amplifying unit 110 can 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 via the first switching unit 130, so as to realize the transmission processing of the first frequency band signal.

As shown in FIG3 , optionally, the first transceiver circuit 10 may further include a first filter circuit 140 for filtering the first frequency band signal after power amplification, and transmitting the filtered signal to the first antenna port ANT1 via the first switch unit 130. Exemplarily, the first filter circuit 140 may further include a plurality of low-frequency filters, and the first transmitting amplification unit 110 may include a low-frequency power amplifier and a first switch, wherein the input end of the low-frequency power amplifier is connected to the first input port LB RFIN, the output end of the low-frequency power amplifier is connected to the first end of the first switch, the plurality of second ends of the first switch are respectively connected to the first ends of the plurality of low-frequency filters in a one-to-one correspondence, the second ends of the plurality of low-frequency filters are respectively connected to the plurality of first ends of the first switch unit 130 in a corresponding manner, and the frequency bands of the low-frequency signals output by each low-frequency filter are different. By controlling the conduction state of the first switch and the first switch unit 130, the transmission processing of any low-frequency signal can be realized.

Please continue to refer to Figure 3. Optionally, the first transceiver circuit 10 may also include a first coupling unit 150 arranged 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 transmission link to output the corresponding coupling signal to the RF transceiver to achieve power detection of the first frequency band signal.

The input port of the first receiving amplification unit 120 receives the first frequency band signal from the first antenna port ANT1 via the first switching unit 130, and the output end of the first receiving amplification unit 120 is connected to the output port LNAOUT, for performing low-noise amplification processing on the received first frequency band signal. The first frequency band signal after the low-noise amplification processing is transmitted to the RF transceiver via the output port LNAOUT to realize the main set receiving processing of the first frequency band signal.

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

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

Please continue to refer to FIG. 2. In one embodiment, the second transceiver circuit 20 includes a second transmitting amplifier unit 210, a second receiving amplifier unit 220, a second switch unit 230 and a first sub-receiving circuit 240. Among them, the multiple first ends of the second switch unit 230 are respectively connected to the first transmitting amplifier unit 110, the second transmitting amplifier unit 210, the first receiving amplifier unit 120 and the second receiving amplifier unit 220, and a second end of the first switch unit 130 is connected to the second antenna port ANT2, which is used to conduct the passage between the second transmitting amplifier unit 210, the second receiving amplifier unit 220 and the second antenna port ANT2 respectively in time division. Among them, the input end of the second transmitting amplifier unit 210 is connected to the second input port MHB RFIN, and the output end of the second transmitting amplifier unit 210 is connected to the second antenna port ANT2 through the second switch unit 230. Among them, the second transmitting amplifier unit 210 can 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 to realize the transmission processing of the second frequency band signal.

Please continue to refer to Figure 3. Optionally, the second transceiver circuit 20 may also include a third filtering circuit 250, which is used to filter the second frequency band signal after power amplification processing, and transmit the filtered signal to the second antenna port ANT2 through the second switch unit 230. Exemplarily, the third filtering circuit 250 may also include multiple intermediate frequency filters and multiple high frequency filters, the intermediate frequency filter only allows the intermediate frequency signal of the preset frequency band to pass, and the high frequency filter only allows the high frequency signal of the preset frequency band to pass, and the frequency bands of the signals output by each intermediate frequency filter and each high frequency filter are different. The second transmitting amplification unit 210 may include an intermediate frequency power amplifier, a high frequency power amplifier and multiple 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 the 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 respectively support power amplification processing of the intermediate frequency signal and the high frequency signal. Exemplarily, the output end of the intermediate frequency power amplifier is connected to the first end of a third switch, and the multiple second ends of the third switch are respectively connected to the first ends of multiple intermediate frequency filters, and the second ends of the multiple intermediate frequency filters are respectively connected to the multiple first ends of the first switch unit 130. The output end of the high frequency power amplifier is connected to the first end of another third switch, and the multiple second ends of the third switch are respectively connected to the first ends of multiple high frequency filters, and the second ends of the multiple high frequency filters are respectively connected to the multiple first ends of the first switch unit 130. By controlling the conduction state of the third switch and the second switch unit 230, the transmission processing of any intermediate frequency signal and high frequency can be realized.

Please continue to refer to FIG. 3. Optionally, 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, wherein 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 also include a second coupling unit 260 and a third coupling unit 270, wherein the second coupling unit 260 may be arranged on a first medium-high frequency transmission link between a second end of the second switch unit 230 and a second antenna port ANT2, and is used to couple the second frequency band signal on the first medium-high frequency transmission link to output the corresponding coupling signal to the RF transceiver, so as to realize power detection of the second frequency band signal. The third coupling unit 270 may be arranged on a second medium-high frequency transmission link between another second end of the second switch unit 230 and another second antenna port ANT2, and is used to couple the second frequency band signal on the second medium-high frequency transmission link to output the corresponding coupling signal to the RF transceiver, so as to realize power detection of the second frequency band signal.

The input port of the second receiving amplification unit 220 receives the second frequency band signal from the second antenna port ANT2 via the second switching unit 230, and the output end of the second receiving amplification unit 220 is connected to the output port LNAOUT, for performing low-noise amplification processing on the received second frequency band signal. The second frequency band signal after the low-noise amplification processing is transmitted to the RF transceiver via the output port LNAOUT to realize the main set receiving processing of the second frequency band signal.

Please continue to refer to Figure 3. Optionally, the second transceiver circuit 20 may also include a fourth filtering circuit 280, which is used to filter the second frequency band signal received by the second antenna port ANT2, and transmit the filtered signal to the second receiving amplifier unit 220 for amplification, so as to be transmitted to the RF transceiver through different output ports LNAOUT. Exemplarily, the fourth filtering circuit 280 may include multiple intermediate frequency filters and multiple high frequency filters, and the second receiving amplifier unit 220 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier and multiple fourth switches. Among them, the sum of the number of intermediate frequency and high frequency low noise amplifiers may be the same as the number of fourth switches. The input end of each intermediate frequency low noise amplifier is connected to the first end of a fourth switch, and the multiple second ends of the fourth switch are respectively connected to the first ends of multiple intermediate frequency filters in a one-to-one correspondence. The second ends of the multiple intermediate frequency filters are respectively connected to the multiple first ends of the second switch unit 230, and the frequency bands of the low frequency signals output by each intermediate frequency filter are different. The input end of each high-frequency low-noise amplifier is connected to the first end of another fourth switch, and the multiple second ends of another fourth switch are respectively connected to the first ends of multiple high-frequency filters in a one-to-one correspondence. The second ends of the multiple high-frequency filters are respectively connected to the multiple first ends of the second switch unit 230, and the frequency bands of the low-frequency signals output by each high-frequency filter are different. The output ends of each medium and high-frequency low-noise amplifier are connected to different output ports LNAOUT. In an embodiment of the present application, the second switch unit 230 can be a single-pole multi-throw switch or a double-pole multi-branch switch. Exemplarily, the second switch unit 230 can be an SP7T switch or a DP7T switch.

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 the output port LNAOUT, for performing low-noise amplification processing on the received second frequency band signal to support the main set MIMO reception of the second frequency band signal, wherein the output ends of each low-noise amplifier in the second receiving amplification unit 220 and the first sub-receiving circuit 240 are respectively connected to different output ports LNAOUT.

In an embodiment of the present application, the second transceiver circuit 20 can support the transmission of the second frequency band signal and support the main set reception and main set MIMO reception of the second frequency band signal. Specifically, by controlling the conduction state of the third switch, the fourth switch and the second switch unit 230, the transmission processing and main set reception of any intermediate frequency signal and high frequency signal can be realized. By setting the second sub-receiving circuit, the main set MIMO reception of any intermediate frequency signal and high frequency signal can be realized.

As shown in FIG. 4 , in one embodiment, the RF front-end device is configured with a plurality of first MIMO antenna ports MIMO ANT1. The plurality of first MIMO antenna ports MIMO ANT1 can be connected to the antenna through an external filtering module. The first sub-receiving circuit includes: a third receiving amplifying unit 241. The input end of the third receiving amplifying unit 241 is respectively connected to the plurality of first MIMO antenna ports MIMO ANT1, and the output end of the third receiving amplifying unit 241 is respectively connected to the plurality of output ports LNAOUT, for low-noise amplification of the received second frequency band signal. Exemplarily, 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. Among them, the sum of the number of intermediate frequency and high frequency low noise amplifiers may be the same as the number of fifth switches. The input end of each intermediate frequency and high frequency low noise amplifier is respectively connected to the first end of different fifth switches, and the plurality of second ends of the fifth switch are respectively connected to the plurality of first MIMO antenna ports MIMO ANT1, and the output end of each intermediate frequency and high frequency low noise amplifier is connected to a different output port LNAOUT.

In the embodiment of the present application, by providing the third receiving amplification unit 241 and controlling the conduction state of the fourth switch, the main set MIMO reception of any intermediate frequency signal or high frequency signal can be achieved.

As shown in FIG5 , 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. Among them, the plurality of input ends of the third receiving amplifying unit 241 are respectively connected to the first ends of the plurality of first filtering units 243, and the output ends of the third receiving amplifying unit 241 are respectively connected to the plurality of output ports LNAOUT, for low-noise amplification of the received second frequency band signal. Specifically, 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. The input ends of each intermediate frequency and high frequency low noise amplifier are respectively connected to the first ends of different fifth switches, and the output ends of each intermediate frequency and high frequency low noise amplifier are connected to different output ports LNAOUT. The plurality of second ends of the fifth switch are used as the plurality of input ends of the third receiving amplifying unit 241, and are respectively connected to the first ends of the plurality of first filtering units 243. The second ends of the plurality of first filter units 243 are respectively connected to the first ends of the third switch unit 242 in a one-to-one correspondence, and the second end of the third switch unit 242 is connected to the first MIMO antenna port MIMO ANT1; the frequency range of the signal output by each first filter unit 243 is different. Among them, the first filter 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 a preset frequency band to pass through, and the frequency bands of the output intermediate frequency signals are different, and each high frequency filter only allows the high frequency signal of a preset frequency band to pass through, and the frequency bands of the output high frequency signals are different.

In this embodiment, the external filtering module set in the RF front-end device can be built into the RF front-end device, and the configuration of the first MIMO antenna port MIMO ANT1 can be reduced, which can further improve the integration of the RF front-end device and reduce the cost and port configuration of the RF front-end device.

As shown in FIG6 , compared with the RF front-end device in the previous embodiment, the RF front-end device in this embodiment can replace two independent switch devices, the first switch unit and the second switch unit, with a first switch device 101, that is, the first switch unit and the second switch unit are integrated into the first switch device 101. Exemplarily, if the first switch unit is an SP10T switch and the second switch unit is an SP7T switch or a DP7T switch, in this embodiment, the first switch device 101 can be a DP17T switch. Among them, the multiple first ends of the first switch device 101 are respectively connected to the first transmitting amplification unit 110, the second transmitting amplification unit 210, the first receiving amplification unit 120, and the second receiving amplification unit 220, and the two second ends of the first switch device 101 are respectively connected to the first antenna port ANT1 and the second antenna port ANT2.

In the embodiment of the present application, by setting the first switch device 101, compared with setting the independent first switch unit 130 and the second switch unit 230 in the aforementioned embodiment, the cost can be reduced and the control logic of the switch on and off control can be simplified to achieve rapid switching of the transmission of the first frequency band signal, the second frequency band signal and the main set reception, thereby improving the communication performance.

Please continue to refer to Figure 6. Optionally, when the RF front-end device includes the first switch device 101, the RF front-end device may only be provided with two coupling units, and illustratively, may include a fourth coupling unit 102 and a fifth coupling unit 103. The fourth coupling unit 102 may be provided on the first transmission link between a second end of the first switch device 101 and the first antenna port ANT1, and is used to couple the first frequency band signal on the first transmission link to output the corresponding coupling signal to the RF transceiver, so as to achieve power detection of the first frequency band signal. The fifth coupling unit 103 may be provided on the second transmission link between the other second end of the first switch device 101 and the second antenna port ANT2, and is used to couple the second frequency band signal on the second transmission link to output the corresponding coupling signal to the RF transceiver, so as to achieve power detection of the second frequency band signal.

In this embodiment, by setting the first switching device 101, only two coupling units, the fourth and fifth coupling units 103, need to be set accordingly. Compared with the three coupling units set in the previous embodiment, the cost of the coupling units can be reduced, the occupied area can be saved, and it is conducive to the miniaturization design of the device.

As shown in FIG. 7 , in one embodiment, the RF front-end device is further configured with a third input port 2G HBIN. The RF front-end device further includes: a first transmitting circuit 50, which is used to support the transmission of a third frequency band signal from the RF transceiver, wherein the communication standard of the third frequency band signal is different from the communication standard of the second frequency band. The third frequency band signal can be a 2G high frequency signal. The third input port 2G HB IN can also be referred to as a 2G high frequency port. The input end of the first transmitting circuit 50 is connected to the third input port 2G HB IN, and the output end of the first transmitting circuit 50 is connected to the other first end of the second switch unit 230.

In this embodiment, without adding an additional antenna port, the first transmitting circuit 50 can be switched to the first antenna port ANT1 through the first switching unit 130 to realize the transmission of the 2G high-frequency signal, which can reduce the configuration of one 2G high-frequency antenna port and reduce costs. At the same time, the communication frequency band of the RF front-end device can be further expanded to further improve the transmission performance of the RF front-end device.

Please continue to refer to Figure 7. Optionally, the RF front-end device may also be configured with a 2G low-frequency port 2G LB IN connected to the RF transceiver. The RF front-end device also includes 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, without adding an additional antenna port, the 2G low-frequency transmitting circuit 60 can be switched to the first antenna port ANT1 through the first switching unit 130 to realize the transmission of the 2G low-frequency signal, which can further expand the communication frequency band of the RF front-end device to further improve the transmission performance of the RF front-end device.

As shown in FIG8 , in one embodiment, the first receiving circuit 30 includes: a fourth receiving amplification unit 310, a fourth switch unit 320 and a plurality of third filter units 330, wherein the frequency range of the low-frequency signal output by each third filter unit 330 is different. Exemplarily, the third filter unit 330 may include a low-frequency filter that allows a low-frequency signal of a preset frequency band to pass through, and the frequency bands of the signals output by each third filter unit 330 are different. The second ends of the plurality of third filter units 330 are respectively connected to the plurality of first ends of the fourth switch unit 320, the second end of the fourth switch unit 320 is connected to the third antenna port ANT3, and the fourth switch unit 320 is used to select and conduct the path between any third filter unit 330 and the third antenna port ANT3.

Among them, the multiple first ends of the fourth receiving amplifier unit 310 are respectively connected to the first ends of the multiple third filtering units 330, and the output end of the fourth receiving amplifier unit 310 is connected to the output port LNAOUT, which is used to perform low noise amplification processing on the received first frequency band signal. Specifically, the fourth receiving amplifier 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 respectively connected to 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 multiple second ends of the sixth switch are used as the multiple input ends of the fourth receiving amplifier unit 310, and are respectively connected to the first ends of the multiple third filtering units 330. The second ends of the multiple third filtering units 330 are respectively connected to the multiple first ends of the fourth switch unit 320 in a one-to-one correspondence, and the second end of the fourth switch unit 320 is connected to the third antenna port ANT3. In the embodiment of the present application, the sixth switch and the fourth switch unit 320 can both be single-pole multi-throw switches. Exemplarily, the fourth switch unit 320 can be an SP6T switch.

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

Please continue to refer to Figure 8. In one embodiment, the second receiving circuit 40 includes: a second sub-receiving circuit 410, a fifth receiving amplification unit 420, a fifth switch unit 430 and a plurality of fourth filtering units 440. The fourth filtering unit 440 may include one of an intermediate frequency filter and a high frequency filter. Among them, the frequency range of the intermediate frequency or high frequency signal output by each fourth filtering unit 440 is different. Exemplarily, the intermediate frequency filter allows the intermediate frequency signal of the preset frequency band to pass through, and the high frequency filter allows the intermediate frequency signal of the preset frequency band to pass through, and the frequency bands of the signals output by each fourth filtering unit 440 are different. Multiple first ends of the fifth switch unit 430 are correspondingly connected to the second ends of the plurality of fourth filtering units 440, and the second end of the fifth switch unit 430 is connected to the fourth antenna port. The fifth switch unit 430 is used to select and conduct the path between any fourth filtering unit 440 and the fourth antenna port.

Among them, the multiple first ends of the fifth receiving amplifier unit 420 are respectively connected to the first ends of the multiple fourth filtering units 440, and the output end of the fifth receiving amplifier unit 420 is connected to the output port LNAOUT, which is used to perform low noise amplification processing on the received second frequency band signal. Specifically, the fifth receiving amplifier unit 420 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier and multiple seventh switches. Among them, the sum of the number of intermediate frequency and high frequency low noise amplifiers is equal to the number of seventh switches. The input ends of each intermediate frequency and high frequency low noise amplifier are respectively connected to the first end of each seventh switch, and the output ends of each intermediate frequency and high frequency low noise amplifier are connected to different output ports LNAOUT. The multiple second ends of the seventh switch are used as the multiple input ends of the fifth receiving amplifier unit 420, and are respectively connected to the first ends of the multiple fourth filtering units 440. In the embodiment of the present application, the seventh switch and the fifth switch unit 430 can both be single-pole multi-throw switches. Exemplarily, the fifth switch unit 430 can be an SP8T switch.

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

In an embodiment of the present application, the second receiving circuit 40 can support diversity reception and diversity MIMO reception of the second frequency band signal. Specifically, by controlling the conduction state of the sixth switch, the seventh switch and the fifth switch unit 430, diversity reception and diversity MIMO reception of any intermediate frequency signal or high frequency signal can be achieved.

As shown in FIG. 9 , in one embodiment, in one embodiment, the RF front-end device is configured with multiple second MIMO antenna ports MIMO ANT2, and the multiple second MIMO antenna ports MIMO ANT2 can be connected to the antenna through an external filtering module. The second sub-receiving circuit includes: a sixth receiving amplifier unit 411. The input end of the sixth receiving amplifier unit 411 is respectively connected to the multiple second MIMO antenna ports, and the output end of the sixth receiving amplifier unit 411 is respectively connected to the multiple output ports LNAOUT, for low-noise amplification processing of the received second frequency band signal to support diversity MIMO reception of the second frequency band signal. Exemplarily, the sixth receiving amplifier unit 411 may include at least one intermediate frequency low noise amplifier, at least one high frequency low noise amplifier and multiple eighth switches. Among them, the sum of the number of intermediate frequency and high frequency low noise amplifiers may be the same as the number of eighth switches. The input end of each intermediate frequency and high frequency low noise amplifier is respectively connected to the first end of different eighth switches, and the multiple second ends of the eighth switch are respectively connected to the multiple second MIMO antenna ports MIMO ANT2, and the output end of each intermediate frequency and high frequency low noise amplifier is connected to different output ports LNAOUT.

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

As shown in FIG. 10 , in one embodiment, the RF front-end device is configured with a second MIMO antenna port MIMO ANT2, and the second sub-receiving circuit includes: a sixth receiving amplifier unit 411, a sixth switch unit 412, and a plurality of fifth filtering units 413. The plurality of input ends of the sixth receiving amplifier unit 411 are respectively connected to the first ends of the plurality of fifth filtering units 413, and the output ends of the sixth receiving amplifier unit 411 are respectively connected to the plurality of output ports LNAOUT, for low-noise amplification of the received second frequency band signal. Specifically, the sixth receiving amplifier 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 each intermediate frequency and high frequency low noise amplifier are respectively connected to the first ends of different eighth switches, and the output ends of each intermediate frequency and high frequency low noise amplifier are connected to different output ports LNAOUT. The plurality of second ends of the eighth switch are used as the plurality of input ends of the third receiving amplifier unit 241, and are respectively connected to the first ends of the plurality of fifth filtering units 413. The output ends of each intermediate frequency and high frequency low noise amplifier are connected to different output ports LNAOUT. The second ends of the plurality of fifth filter units 413 are respectively connected to the corresponding first ends of some of the sixth switch units 412, and the second end of the sixth switch unit 412 is connected to the second MIMO antenna port MIMO ANT2; wherein 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 each fifth filter unit 413 are different. The fifth filter unit 413 may include an intermediate frequency filter and a high frequency filter, each intermediate frequency filter only allows the intermediate frequency signal of a preset frequency band to pass through, and the frequency bands of the output intermediate frequency signals are different, and each high frequency filter only allows the high frequency signal of a preset frequency band to pass through, and the frequency bands of the output high frequency signals are different.

In this embodiment, the external filtering module set in the RF front-end device can be built into the RF front-end device, and the configuration of the second MIMO antenna port MIMO ANT2 can be reduced, which can further improve the integration of the RF front-end device and reduce the cost and port configuration of the RF front-end device.

As shown in FIG11 , compared with the RF front-end device in the previous embodiment, the RF front-end device in this embodiment can replace the two independent switch devices of the fourth switch unit and the fifth switch unit with a second switch device 102, that is, the fourth switch unit and the fifth switch unit are integrated into the second switch device 102. Exemplarily, if the first switch unit is an SP6T switch and the second switch unit is an SP8T switch, in this embodiment, the second switch device 102 can be a DP13T switch. Among them, the multiple first ends of the second switch device 102 are respectively connected to the multiple third filter units 330 and the multiple fourth filter units 440 in a one-to-one correspondence, and the two second ends of the switch device are respectively connected to the third antenna port ANT3 and the fourth antenna port ANT4.

In the embodiment of the present application, by setting the second switch device 102, compared with setting the independent fourth switch unit 320 and the fifth switch unit 430 in the aforementioned embodiment, the cost can be reduced and the control logic of the switch on-off control can be simplified to achieve rapid switching of the diversity reception of the first frequency band signal and the second frequency band signal, thereby improving the communication performance.

As shown in FIG. 12 , in one embodiment, the first MIMO antenna port MIMO ANT1 is also used to receive a first frequency band signal, and the RF front-end device further includes: a second filtering unit 245. The first end of the second filtering unit 245 is connected to the other first end of the third switch unit 242, and the second end of the second filtering unit 245 is connected to the first receiving amplifier unit 120, for allowing a preset signal in the first frequency band signal to pass through, wherein the first receiving amplifier unit 120 is used to perform low-noise amplification processing on the preset signal to support the main set MIMO reception of the preset signal. Specifically, the preset signal in the first frequency band signal can be a 5G NR low-frequency signal, for example, an N28 signal. Exemplarily, the third switch unit 242 can be a single-pole multi-throw switch, and some first ends in the first switch unit 130 are respectively connected to multiple first filtering units 243, and one first end is connected to the second filtering unit 245. The second filtering unit 245 allows the first frequency band signal to pass through to output a preset signal, for example, an N28 signal. The preset signal after filtering can be transmitted to the first receiving amplifier unit 120, and the first receiving amplifier unit 120 performs low noise amplification processing on it to achieve main set MIMO reception of the preset signal. Based on the above description, it can be known that the first receiving amplifier unit 120 can also support the main set reception of the first frequency band signal. The RF front-end device in this embodiment can support the main set reception and main set MIMO reception of the 5G NR low frequency signal, thereby improving the reception performance of the 5G NR low frequency signal.

Optionally, please continue to refer to Figure 12. The second MIMO antenna port MIMO ANT2 in this embodiment is also used to receive the first frequency band signal, and the RF front-end device also includes: a seventh filtering unit 415. The first end of the seventh filtering unit 415 is connected to the other first end of the sixth switch unit 412, and the second end of the seventh filtering unit 415 is connected to the fourth receiving amplifier unit 310, which is used to allow the preset signal in the first frequency band signal to pass. The fourth receiving amplifier unit 310 is used to perform low-noise amplification processing on the preset signal to support diversity MIMO reception of the preset signal. Specifically, the preset signal in the first frequency band signal can be a 5G NR low-frequency signal, for example, an N28 signal. Exemplarily, the sixth switch unit 412 can be a single-pole multi-throw switch, and some of the first ends in the sixth switch unit 412 are respectively connected to multiple fifth filtering units 413, and one first end is connected to the second filtering unit 245. Among them, the seventh filtering unit 415 allows the first frequency band signal to pass to output a preset signal, for example, an N28 signal. The preset signal after filtering may be transmitted to the fourth receiving amplifying unit 310 , and the fourth receiving amplifying unit 310 performs low noise amplification processing on the preset signal to achieve diversity MIMO reception of the preset signal.

Based on the foregoing description, it can be known that the fourth receiving amplification unit 310 can also support diversity reception of the first frequency band signal. The RF front-end device in this embodiment can support main set reception, main set MIMO reception, diversity reception and diversity MIMO reception of 5G NR low frequency signals to support 4*4 MIMO function. Therefore, the reception performance of 5G NR low frequency signals can be improved.

As shown in Figure 13, an embodiment of the present application also provides a radio frequency system, including a radio frequency transceiver 12 and the radio frequency front-end device 11 in any of the aforementioned embodiments, and the input port and output port LNAOUT of the radio frequency front-end device 11 are respectively connected to the radio frequency transceiver 12.

The radio frequency system of this embodiment includes a first transceiver circuit 10, a second transceiver circuit 20, a first receiving circuit 30 and a second receiving circuit 40, which can simultaneously support dual transmission of the first frequency band signal and the second frequency band signal, as well as dual-channel reception of the first frequency band signal, and four-channel reception of the second frequency band signal, which can avoid the use of multiple discrete radio frequency modules, such as transceiver modules, receiving modules, etc., and can realize the dual connection (LTE NR DoubleConnect, ENDC) combination of 4G-LTE signals and 5G-NR, and support the 4*4MIMO function of the second frequency band signal, which can improve the integration, reduce the occupied area, reduce the cost and facilitate the miniaturization design of the radio frequency system, and further improve the communication performance of the antenna assembly. Furthermore, by integrating the first transceiver circuit 10, the second transceiver circuit 20, the first receiving circuit 30 and the second receiving circuit 40 in the radio frequency front-end device 11, while reducing the complexity of power supply and radio frequency routing, reducing the complexity of single board layout, the insertion loss can also be reduced to improve the communication performance of the device.

As shown in FIG14 , in one embodiment, the RF front-end device 11 is configured with a first MIMO antenna port MIMO ANT1 and a second MIMO antenna port MIMO ANT2. The RF system further includes: a first combiner 13 and a second combiner 14, wherein the two first ends of the first combiner 13 are respectively connected to the first antenna port ANT1 and the second antenna port ANT2, the second end of the first combiner 13 is connected to the first antenna Ant1, the two first ends of the second combiner 14 are respectively connected to the third antenna port ANT3 and the fourth antenna port ANT4, the second end of the second combiner 14 is connected to the second antenna Ant2, the first MIMO antenna port MIMO ANT1 configured by the RF front-end device 11 is connected to the third antenna Ant3, and the second MIMO antenna port MIMO ANT2 configured by the RF front-end device 11 is connected to the fourth antenna Ant4.

In this embodiment, by building an external filtering module into the RF front-end device 11, the integration of the RF front-end device 11 can be further improved; in addition, by setting a first combiner 13, a second combiner 14 and four antennas, a dual connection combination of 4G-LTE signals and 5G-NR can be achieved, as well as support for 4*4 MIMO functions for second frequency band signals and 4*4 MIMO functions for preset signals in the first frequency band signals (for example, N28 frequency band signals), which can improve the integration, reduce the occupied area, reduce the cost and facilitate the miniaturization design of the RF system, while further improving the communication performance of the antenna assembly.

As shown in FIG15 , in one embodiment, the RF 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 RF system further includes: a first combiner 13, a second combiner 14, and a first filter module 15 and a second filter module 16 for filtering the second frequency band signal, wherein the first filter module 15 and the second filter module 16 can both support filtering of intermediate frequency signals and high frequency signals of different frequency bands. The two first ends of the first combiner 13 are respectively connected to the first antenna Ant1 port ANT1 and the second antenna Ant2 port ANT2, and the second end of the first combiner 13 is connected to the first antenna Ant1; the two first ends of the second combiner 14 are respectively connected to the third antenna Ant3 port ANT3 and the fourth antenna Ant4 port ANT4, and the second end of the second combiner 14 is connected to the second antenna Ant2; the multiple first MIMO antenna ports MIMO ANT1 configured by the RF front-end device 11 are respectively connected to the first end of the first filtering module 15, and the second end of the first filtering module 15 is connected to the third antenna Ant3; the multiple second MIMO antenna ports MIMO ANT2 configured by the RF front-end device 11 are respectively connected to the first end of the second filtering module 16, and the second end of the second filtering module 16 is connected to the fourth antenna Ant4.

In this embodiment, by setting up an RF front-end device 11, a first filtering module 15, a second filtering module 16, a first combiner 13, a second combiner 14 and four antennas, a dual connection combination of 4G-LTE signals and 5G-NR can be achieved, and a 4*4MIMO function for the second frequency band signal can be supported. While improving the integration, reducing the occupied area, reducing the cost and being conducive to the miniaturization design of the RF system, the communication performance of the antenna assembly can be further improved.

Optionally, as shown in FIG16, based on the RF system shown in FIG15, the RF system further includes: a third combiner 17, a fourth combiner 18, a third filter module 191 and a fourth filter module 192. The third filter module 191 and the fourth filter module 192 are respectively connected to the RF transceiver 12, and can be used to filter the first frequency band signal. The two first ends of the third combiner 17 are respectively connected to the first filter module 15 and the third filter module 191, and the second end of the third combiner 17 is connected to the third antenna Ant3. The two first ends of the fourth combiner 18 are respectively connected to the second filter module 16 and the fourth filter module 192, and the second end of the fourth combiner 18 is connected to the fourth antenna Ant4.

In this embodiment, by setting the RF 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, it is possible to achieve a dual connection combination of 4G-LTE signals and 5G-NR, support the 4*4 MIMO function for the second frequency band signal, and support the 4*4 MIMO function for the preset signal in the first frequency band signal (for example, the N28 frequency band signal), which can improve the integration, reduce the occupied area, reduce the cost and facilitate the miniaturization design of the RF system, while further improving the communication performance of the antenna assembly.

The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims (19)

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 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; 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,

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 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.