CN113992229A

CN113992229A - Radio frequency system and communication equipment

Info

Publication number: CN113992229A
Application number: CN202111447467.7A
Authority: CN
Inventors: 王国龙
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-01-28
Anticipated expiration: 2041-11-30
Also published as: CN113992229B; WO2023098201A1

Abstract

The invention relates to a radio frequency system and communication equipment. The radio frequency system includes: a radio frequency transceiver; the receiving and transmitting module is respectively connected with the radio frequency transceiver and the first antenna and is used for supporting the transmission and the main set receiving of low-frequency band radio frequency signals; the diversity receiving module is respectively connected with the radio frequency transceiver and the second antenna and is used for supporting diversity reception of low-frequency band radio frequency signals; the first MIMO receiving module is respectively connected with the radio frequency transceiver and the third antenna and is used for supporting the main set MIMO receiving of the low-frequency band radio frequency signals; and the second MIMO receiving module is respectively connected with the radio frequency transceiver and the fourth antenna and is used for supporting diversity MIMO receiving of the low-frequency band radio frequency signals. The throughput of the radio frequency system to the low-frequency band radio frequency signals can be improved, and the data transmission rate of the communication equipment in the low-frequency network is further improved.

Description

Radio frequency system and communication equipment

Technical Field

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

Background

With the development and progress of the technology, the 5G mobile communication technology is gradually beginning to be applied to electronic devices. Compared with 5G high-frequency signals, 5G low-frequency signals have low radio frequency, relatively long wavelength, stronger diffraction capability and larger coverage capability, so that the applications to 5G low-frequency networks are wide at present, but the data transmission rate of the 5G low-frequency signals is low.

Disclosure of Invention

The embodiment of the application provides a radio frequency system and communication equipment, which can improve the throughput of low-frequency signals and improve the data transmission rate of the communication equipment.

A radio frequency system, comprising:

a radio frequency transceiver;

the transceiver module is respectively connected with the radio frequency transceiver and the first antenna and is used for supporting the transmission and the main set receiving of low-frequency band radio frequency signals;

the diversity receiving module is respectively connected with the radio frequency transceiver and the second antenna and is used for supporting diversity reception of the low-frequency band radio frequency signal;

the first MIMO receiving module is respectively connected with the radio frequency transceiver and the third antenna and is used for supporting the main set MIMO receiving of the low-frequency band radio frequency signals;

and the second MIMO receiving module is respectively connected with the radio frequency transceiver and the fourth antenna and is used for supporting diversity MIMO receiving of the low-frequency band radio frequency signal.

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

According to the radio frequency system and the communication equipment, the transmitting and the main set receiving of the low-frequency band radio frequency signals are realized through the transceiver module, the diversity receiving module carries out diversity receiving on the low-frequency band radio frequency signals, the first MIMO receiving module carries out main set MIMO receiving on the low-frequency band radio frequency signals, and the second MIMO receiving module carries out diversity MIMO receiving on the low-frequency band radio frequency signals, so that the radio frequency system can support 4 x 4MIMO receiving on the low-frequency band radio frequency signals, the throughput of the radio frequency system on the low-frequency band radio frequency signals is improved, and the data transmission rate of the communication equipment under a low-frequency network is further improved.

Drawings

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

Fig. 1 is a schematic structural diagram of a radio frequency system according to an embodiment;

fig. 2 is a second schematic structural diagram of an rf system according to an embodiment;

FIG. 3 is a third exemplary schematic diagram of an RF system according to an embodiment;

FIG. 4 is a fourth schematic structural diagram of an RF system according to an embodiment;

FIG. 5 is a fifth exemplary schematic structural diagram of an RF system according to an embodiment;

FIG. 6 is a sixth exemplary embodiment of a RF system;

FIG. 7 is a seventh schematic structural diagram of an RF system according to an embodiment;

FIG. 8 is an eighth schematic block diagram of an exemplary RF system;

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

FIG. 10 is a block diagram illustrating an exemplary RF system;

FIG. 11 is an eleventh illustration showing a schematic structure of an exemplary RF system;

FIG. 12 is a twelfth block diagram of an exemplary RF system;

fig. 13 is a schematic diagram of a communication device of an embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and in the accompanying drawings, preferred embodiments of the present application are set forth. 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. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed 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 such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

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

As shown in fig. 1, in one embodiment, the radio frequency system includes a radio frequency transceiver 10, a transceiver module 20, a diversity receiving module 30, a first MIMO receiving module 40, and a second MIMO receiving module 50.

The radio frequency system further comprises an antenna group comprising at least a first antenna ANT1, a second antenna ANT2, a third antenna ANT3 and a fourth antenna ANT 4. The first antenna ANT1, the second antenna ANT2, the third antenna ANT3 and the fourth antenna ANT4 are all antennas capable of supporting 5G NR signals.

In one embodiment, each antenna in the antenna group may be a directional antenna or a non-directional antenna. For example, the antennas in an antenna group may be formed using any suitable type of antenna. For example, each antenna within an antenna group may include an antenna with resonant elements formed from the following antenna structure: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for frequency band combining of different radio frequency signals.

Illustratively, the radio frequency transceiver 10 may include a transmitter and a receiver. The radio frequency transceiver 10 may be configured to implement frequency conversion between radio frequency signals and baseband signals, and/or implement frequency conversion of signals in different frequency bands, and so on.

In the embodiment of the present application, the transceiver module 20, by cooperating with the first antenna ANT1, can implement transmission and main set reception of low-frequency band radio frequency signals; the diversity receiving module 30 is matched with the second antenna ANT2 to implement diversity reception of low-frequency band radio frequency signals; the first MIMO receiving module 40 is matched with the third antenna ANT3, so as to implement dominant set MIMO receiving of low-frequency band radio frequency signals; the second MIMO receiving module 50 is matched with the fourth antenna ANT4, so that diversity MIMO receiving of low-frequency band radio frequency signals can be realized, and further 4 × 4MIMO receiving of low-frequency band radio frequency signals is supported.

The MIMO (Multiple Input Multiple Output, Multiple transmission and Multiple reception) technology is to use Multiple transmitting antennas and Multiple receiving antennas at a transmitting port and a receiving port, respectively, to fully utilize space resources, and implement Multiple transmission and Multiple reception through Multiple antennas, so that channel capacity of a system can be increased by Multiple times without increasing spectrum resources and antenna transmitting power. According to the embodiment of the application, the radio frequency system with the 4 x 4MIMO function for supporting the low-frequency band radio frequency signals is configured, so that the throughput of the low-frequency band radio frequency signals can be improved in a multiplied manner.

The low-band rf signals in the embodiments of the present application may include 5G low-band rf signals and/or 4G low-band rf signals. In one embodiment, the low band rf signal may include at least one of N5, N8, N20, N28A.

In one embodiment, transceiver module 20 is configured to support transmission and dominant set reception of a plurality of low band radio frequency signals. In one embodiment, the transceiver module 20 may select one of a plurality of radio frequency signals for transmission, and may perform a main set reception on radio frequency signals of at least one frequency band. In another embodiment, the transceiver module 20 may transmit radio frequency signals in more than two frequency bands simultaneously, and may also perform main set reception on radio frequency signals in more than two frequency bands.

In one embodiment, the diversity reception module 30 is configured to support diversity reception of radio frequency signals of a plurality of low frequency bands. In one embodiment, the diversity receiving module 30 may select one of the plurality of low frequency band rf signals for diversity reception. In another embodiment, the diversity receiving module 30 may simultaneously perform diversity reception on more than two low frequency bands of radio frequency signals.

In one embodiment, the first MIMO receiving module 40 is configured to support dominant set MIMO reception of radio frequency signals of a plurality of low frequency bands. In one embodiment, the first MIMO receiving module 40 may select one of the plurality of low band radio frequency signals for the main set MIMO reception. In another embodiment, the first MIMO receiving module 40 may perform dominant MIMO reception on more than two low band rf signals simultaneously.

In one embodiment, the second MIMO receiving module 50 is configured to support diversity MIMO reception of a plurality of low band radio frequency signals. In one embodiment, the second MIMO receiving module 50 may select one of the plurality of low band radio frequency signals for diversity MIMO reception. In another embodiment, the second MIMO receiving module 50 may perform diversity MIMO reception on more than two low-band rf signals at the same time.

As shown in fig. 2, in one embodiment, the first MIMO receiving module 40 includes a first filtering selection unit 420 and a first amplification unit 410. The first filter selection unit 420 includes at least one input terminal and a plurality of output terminals, and the first amplification unit 410 includes a plurality of input terminals and at least one output terminal. An input end of the first filter selection unit 420 is connected to the third antenna ANT3, a plurality of output ends of the first filter selection unit 420 are respectively connected to a plurality of input ends of the first amplification unit 410 in a one-to-one correspondence, and an output end of the first amplification unit 410 is connected to the radio frequency transceiver 10.

The first filtering selection unit 420 performs filtering processing on the radio frequency signal received by the third antenna ANT3 and selects and outputs a 5G radio frequency signal of at least one frequency band to the first amplification unit 410, and the first amplification unit 410 performs low noise amplification processing on the received low frequency band radio frequency signal and outputs the low frequency band radio frequency signal to the radio frequency transceiver 10. For example, when the target frequency band is the N28A frequency band, the first filter selection unit 420 filters the radio frequency signal received by the third antenna ANT3, selects a filter path capable of outputting the N28A frequency band to process the radio frequency signal, and outputs the radio frequency signal in the N28A frequency band to the first amplification unit 410 for low noise amplification.

Referring to fig. 3, in one embodiment, the first amplifying unit 410 includes a plurality of first low noise amplifiers 411 and a first selection switch 412. The first selection switch 412 includes at least one first terminal and a plurality of second terminals, the first terminal of the first selection switch 412 is used as the output terminal of the first amplification unit 410, and the plurality of second terminals of the first selection switch 412 are respectively connected to the output terminals of the plurality of first low noise amplifiers 411 in a one-to-one correspondence manner; the input terminals of the first low noise amplifiers 411 are respectively used for being connected with the output terminals of the first filter selecting unit 420 in a one-to-one correspondence manner.

In one embodiment, the first filter selection unit 420 includes a plurality of first filters 421 and a second selection switch 422. One end of each of the first filters 421 serves as a plurality of output ends of the first filtering selection unit 420, and is connected to a plurality of input ends of the first amplification unit 410 in a one-to-one correspondence manner; the second selection switch 422 includes a plurality of first terminals and at least one second terminal, the plurality of first terminals of the second selection switch 422 are respectively connected to the other terminals of the plurality of first filters 421 in a one-to-one correspondence, and the second terminal of the second selection switch 422 is used as an input terminal of the first filtering selection unit 420 and is connected to the third antenna ANT 3. The plurality of first filters 421 can perform filtering processing on the received radio frequency signal, wherein each first filter 421 allows only low frequency signals of one preset frequency band to pass through. For example, if the frequency band of the low-frequency band rf signal may be four different frequency bands N5, N8, N20, and N28A, four first filters 421 may be correspondingly disposed to implement filtering processing on the four low-frequency signals, and after the filtering processing of the four first filters 421, the rf signals of the four frequency bands N5, N8, N20, and N28A may be correspondingly output to the first amplifying unit 410.

In one embodiment, the first MIMO receiving module 40 may be a package structure, and the first MIMO receiving module 40 is configured with an antenna port ANT for connecting the third antenna ANT3 and at least one output port LNA OUT for connecting the radio frequency transceiver 10. The antenna port Ant and the output port LNA OUT configured in the module may be understood as radio frequency pin terminals of the first MIMO receiving module 40, which are used for connecting with external devices. Specifically, the antenna port Ant of the first MIMO receiving module 40 may be used for connecting with an antenna; the output port LNA OUT of the first MIMO receiving module 40 is available for connection with the radio frequency transceiver 10. Illustratively, the antenna port Ant is configured to receive a radio frequency signal output by the third antenna Ant3, and the first MIMO receiving module 40 may perform filtering and amplifying processing on the input radio frequency signal to output the radio frequency signal to the radio frequency transceiver 10 through the output port LNA OUT, so as to implement receiving control on a low-band radio frequency signal.

In this embodiment, integrate first MIMO receiving module 40 into a device, can reduce the mainboard area that radio frequency system occupy, integrated first MIMO receiving module 40 can realize the matching between each part inside the device, reduces the port mismatch, improves the device performance, and integrated first MIMO receiving module 40, only need set up a set of power supply terminal and MIPI control end can, improve the integrated level of device, reduce the complexity of system's overall arrangement, can also reduce cost.

As shown in fig. 4, in one embodiment, the second MIMO receiving module 50 includes a third filtering selection unit 520 and a third amplification unit 510. The third filter selection unit 520 includes at least one input terminal and a plurality of output terminals, and the third amplification unit 510 includes a plurality of input terminals and at least one output terminal. An input end of the third filter selecting unit 520 is connected to the fourth antenna ANT4, a plurality of output ends of the third filter selecting unit 520 are respectively connected to a plurality of input ends of the third amplifying unit 510 in a one-to-one correspondence, and an output end of the third amplifying unit 510 is connected to the radio frequency transceiver 10.

The third filtering selection unit 520 performs filtering processing on the radio frequency signal received by the fourth antenna ANT4 and selects to output a 5G radio frequency signal of at least one frequency band to the third amplification unit 510, and the third amplification unit 510 performs low noise amplification processing on the received 5G radio frequency signal and outputs the signal to the radio frequency transceiver 10. For example, when the target frequency band is the N28A frequency band, the third filter selecting unit 520 filters the rf signal received by the fourth antenna ANT4, selects a filter path capable of outputting the N28A frequency band to process the rf signal, and outputs the rf signal in the N28A frequency band to the third amplifying unit 510 for performing the low noise amplification process.

Referring to fig. 5, in one embodiment, the third amplifying unit includes a plurality of second low noise amplifiers 511 and a third selection switch 512. The third selection switch 512 includes at least one first terminal and a plurality of second terminals, the first terminal of the third selection switch 512 is used as the output terminal of the third amplification unit, and the plurality of second terminals of the third selection switch 512 are respectively connected with the output terminals of the plurality of second low noise amplifiers 511 in a one-to-one correspondence; the input terminals of the second low noise amplifiers 511 are respectively used for being connected with the output terminals of the third filtering selection unit in a one-to-one correspondence manner.

In one embodiment, the third filtering selection unit includes a plurality of second filters 521 and a fourth selection switch 522. One end of each of the second filters 521 is used as a plurality of output ends of the third filtering selection unit 520, and is connected to a plurality of input ends of the third amplification unit in a one-to-one correspondence manner; the fourth selection switch 522 includes a plurality of first terminals and at least one second terminal, the plurality of first terminals of the fourth selection switch 522 are respectively connected to the other terminals of the plurality of second filters 521 in a one-to-one correspondence, and the second terminal of the fourth selection switch 522 is used as an input terminal of the third filtering selection unit and is connected to the fourth antenna ANT 4. The plurality of second filters 521 can filter the received radio frequency signals, wherein each second filter 521 only allows low frequency signals of one preset frequency band to pass through. For example, if the frequency bands of the low-band rf signal may be four different frequency bands N5, N8, N20, and N28A, four second filters 521 may be correspondingly disposed to implement filtering processing on the four low-frequency signals, and after the filtering processing of the four second filters 521, 5G rf signals of the four frequency bands N5, N8, N20, and N28A may be correspondingly output to the third amplifying unit 510.

In one embodiment, the second MIMO receiving module 50 may be a package structure, and the second MIMO receiving module 50 is configured with an antenna port ANT for connecting the fourth antenna ANT4 and at least one output port LNA OUT for connecting the radio frequency transceiver 10. The antenna port Ant and the output port LNA OUT configured in the module may be understood as radio frequency pin terminals of the second MIMO receiving module 50, which are used for connecting with external devices. Specifically, the antenna port Ant of the second MIMO receiving module 50 may be used for connecting with an antenna; the output port LNA OUT of the second MIMO receiving module 50 is available for connection with the radio frequency transceiver 10. Illustratively, the antenna port Ant is configured to receive a radio frequency signal output by the fourth antenna Ant4, and the second MIMO receiving module 50 may perform filtering and amplifying processing on the input radio frequency signal to output the radio frequency signal to the radio frequency transceiver 10 through the output port LNA OUT, so as to implement receiving control on a low-band radio frequency signal.

In this embodiment, integrate second MIMO receiving module 50 into a device, can reduce the mainboard area that radio frequency system occupy, integrated second MIMO receiving module 50 can realize the matching between each part inside the device, reduces the port mismatch, improves the device performance, and second MIMO receiving module 50 after the integration, only need set up a set of power supply terminal and MIPI control end can, improve the integrated level of device, reduce the complexity of system's overall arrangement, can also reduce cost.

Fig. 6 shows an embodiment of a radio frequency system. The transceiver module 20 may include a radio frequency PA Mid device, which may be understood as a Power Amplifier module (PA Mid). The radio frequency PA Mid device can support the receiving and the transmitting of low frequency signals of a plurality of frequency bands, and realize the receiving switching control, the transmitting switching control and the switching control between the transmitting and the receiving of the low frequency signals. The plurality of low frequency signals may include low frequency signals of different frequency bands among 2G signals, 3G signals, 4G signals, and 5G signals. Specifically, the frequency bands of the low-frequency signals may include any one of B5, B8, B12, B20, B26, B28A, B28B, B13, and B19. The frequency bands of N5, N8, N20 and N28A in the 5G signal are the same as the frequency bands of B5, B8, B20 and B28A in the 4G signal, and the same receiving path and transmitting path can be shared. The first antenna port LB ANT of the radio frequency PA Mid device is connected with the first antenna ANT1, one input port 4G LB RFIN of the radio frequency PA Mid device is connected with the radio frequency transceiver 10, at least one output port LNA OUT1 of the radio frequency PA Mid device is connected with the radio frequency transceiver 10, the radio frequency PA Mid device is used for filtering and amplifying low-frequency-band radio frequency signals sent by the radio frequency transceiver 10, outputting the low-frequency-band radio frequency signals to the antenna port LB ANT1, and transmitting the low-frequency-band radio frequency signals through the first antenna ANT1 to realize transmission control of the radio frequency signals of a plurality of low frequency bands. The first antenna port LB ANT of the rf PA Mid device is further configured to receive a low-frequency rf signal received by the first antenna ANT1, and after performing filtering amplification on the low-frequency rf signal, the low-frequency rf signal is output to the rf transceiver 10 through the output port LNA OUT1 or the output port LNA OUT2, so as to implement reception control on multiple low-frequency signals.

The diversity receiving module 30 may include a radio frequency LFEM device (in fig. 6, a radio frequency LFEM device supporting a low frequency band, a medium frequency band, and a high frequency band is used, and in some embodiments, a radio frequency LFEM device supporting only a low frequency band may be used). The rf LFEM device is understood to be a Low Noise AmPlifier Front End module (Low Noise amplfifier-Front-End Modules). The radio frequency LFEM device can support the receiving of low-frequency signals of a plurality of frequency bands and realize the receiving switching control of the low-frequency signals. The plurality of low-frequency signals may include low-frequency signals of different frequency bands in 4G signals and 5G signals. Specifically, the frequency bands of the low-frequency signals may include any one of B5, B8, B12, B20, B26, B28A, B28B, B13, and B19. N5, N8, N20 and N28A in the 5G signal are the same as B5, B8, B20 and B28A in the 4G signal, respectively, and can share the same receiving path. The third antenna port LB3 ANT of the rf LFEM device is connected to the second antenna ANT2, and the transmitting ports (including LNA OUT LB1 and LNA OUT LB2) of the rf LFEM device are connected to the rf transceiver 10. The rf LFEM device is configured to receive a low-frequency rf signal received by the second antenna ANT2, perform filtering and amplification on the low-frequency rf signal, and output the low-frequency rf signal to the rf transceiver 10 through the transmitting port, so as to implement receiving control on multiple low-frequency signals.

Through the cooperation of the transceiver module 20, the diversity receiving module 30, the first MIMO receiving module 40 and the second MIMO receiving module 50, a radio frequency system supporting the reception of 4 × 4MIMO of the low-band radio frequency signal is constructed, and the throughput of the low-band radio frequency signal is improved.

Based on the radio frequency system of the above embodiment, a 4 × 4MIMO function of four antennas can be supported. For example, taking fig. 6 as an example, the operating principle of 4 × 4MIMO function of the N28A frequency band is analyzed:

a TX path:

the transmission signal is output from a TX0 LB1 port of the radio frequency transceiver 10, passes through a radio frequency line, reaches a 4G LB RFIN port of a radio frequency PA Mid device, amplifies the signal by a 4G LB PA, and then reaches a single port of a radio frequency switch SP 9T; the rf switch SP9T switches to contact 9 to the B28A TX path; through the internal radio frequency wire, to the contact 2 of the radio frequency switch SPDT; the radio frequency switch SPDT switches the single port and is connected to the radio frequency switch SP10T through the duplexer; the radio frequency switch SP10T switches a single port to an LB1ANT port; and the signal is output to a first antenna ANT1 through an LB1ANT port and transmitted.

PRX path:

the received radio frequency signal enters from a first antenna ANT1 to an LB1ANT port of a radio frequency PA Mid device; rf switch SP10T switches to contact 9, through the duplexer, to the B28A RX path; to rf switch SP6T, rf switch SP6T switches the single port to LNA2 path; after being amplified by the LNA2, the radio frequency switch DPDT is switched to the contact 1 and is output to an LNA OUT1 port of the radio frequency PA Mid device; the received rf signal enters the rf transceiver 10 through the SDR PRXE port.

DRX (discontinuous reception) path:

the received radio frequency signal enters from a second antenna ANT2 to an LB3 ANT port of the radio frequency LFEM device; the radio frequency switch SP6T is switched to the contact 4, and is filtered by the filter to the radio frequency switch SP3T # 1; the radio frequency switch SP3T #1 switches to a single port, and the single port is amplified by the LNA1 and then reaches the radio frequency switch DPDT; the radio frequency switch DPDT is switched to the contact 1 and is output to the LNA OUT LB1 port of the radio frequency LFEM device; the received rf signal enters the rf transceiver 10 through the SDR drx port.

PRX MIMO path:

the received radio frequency signal enters from the third antenna ANT3, and the antenna port ANT of the first MIMO receiving module 40; the second selection switch 422 is switched to the contact 4, filtered by the first filter 421 and amplified by the first low noise amplifier 411, and then sent to the first selection switch 412; the first selection switch 412 is switched to contact 2 to the LNA OUT port output of the first MIMO receiving module 40; the received rf signal enters the rf transceiver 10 through the SDR PRX3 port.

DRX MIMO path:

the received radio frequency signal enters from the fourth antenna ANT4, and the antenna port ANT of the second MIMO receiving module 50; the fourth selection switch 522 is switched to the contact 4, filtered by the second filter 521 and amplified by the second low noise amplifier 511, and then switched to the third selection switch 512; the third selection switch 512 is switched to the contact 2 to the LNA OUT port output of the second MIMO receiving module 50; the received radio frequency signal enters the radio frequency transceiver 10 via the SDR DRX3 port.

As shown in fig. 7, in one embodiment, the first amplifying unit 410 in the first MIMO receiving module 40 is integrated in the transceiver module 20. The transceiver module 20 may be understood as a package structure configured with at least one first input port LB RFIN and a plurality of output ports LNA OUT for connection with the radio frequency transceiver 10, a first antenna port LB1ANT for connection with a first antenna ANT1, and a plurality of second input ports PRX for one-to-one connection with a plurality of output terminals of the first filter selecting unit 420.

The transceiver module 20 includes a transmitting unit 210, a second filtering selection unit 220, a second amplifying unit 230, and a first switch unit 240. A plurality of input terminals of the first amplifying unit 410 are respectively connected to a plurality of second input ports PRX of the transceiver module 20 in a one-to-one correspondence manner, the transmitting unit 210 is respectively connected to the first input port LB RFIN of the transceiver module 20 and the transmitting path TX of the second filter selecting unit, the receiving path RX of the second filter selecting unit is connected to an input terminal of the second amplifying unit 230, and the second filter selecting unit 220 is further connected to the first antenna port LB1ANT of the transceiver module 20. The first switch unit 240 includes a plurality of first terminals and a plurality of second terminals, the plurality of first terminals of the first switch unit 240 are respectively connected to the plurality of output ports LNA OUT of the transceiver module 20 in a one-to-one correspondence, and the plurality of second terminals of the first switch unit 240 are respectively connected to the output terminal of the first amplifying unit 410 and the output terminal of the second amplifying unit 230. The transmitting unit 210 is configured to receive the low-band radio frequency signal output by the radio frequency transceiver 10, and amplify the received low-band radio frequency signal. The second filtering selection unit 220 is configured to perform filtering processing on the radio frequency signal received by the first antenna ANT1 and select to output a 5G radio frequency signal or a 4G low frequency signal of at least one frequency band, and also configured to perform filtering processing on the low frequency band radio frequency signal output by the transmitting unit 210 and select to output a 5G radio frequency signal or a 4G low frequency signal of at least one frequency band to be radiated by the first antenna ANT 1. The second amplifying unit 230 is configured to amplify the 5G radio frequency signal or the 4G low frequency signal filtered by the second filtering selection unit 220. The first switch unit is used for selectively turning on a path between the first amplifying unit 410, the second amplifying unit 230 and an output port LNA OUT of the transceiver module 20.

Specifically, the radio frequency transceiver 10 inputs a low-frequency 5G radio frequency signal or a low-frequency 4G radio frequency signal to the first input port LB RFIN of the transceiver module 20, amplifies the signal by the transmitting unit 210, outputs the amplified signal to the second filter selecting unit 220 for filtering, selects at least one frequency band of the 5G radio frequency signal or the at least one frequency band of the 4G radio frequency signal, outputs the selected frequency band of the 5G radio frequency signal or the at least one frequency band of the 4G radio frequency signal to the first antenna port LB ANT of the transceiver module 20, and transmits the selected frequency band of the 5G radio frequency signal or the 4G radio frequency signal by the first antenna ANT1, so as to transmit the low-frequency band of the 5G radio frequency signal or the 4G radio frequency signal. The first antenna ANT1 outputs the received low-frequency rf signal to the first antenna port LB ANT of the transceiver module 20, and after being filtered by the second filter selection unit 220, the received low-frequency rf signal is output to the second amplification unit 230 for low noise amplification, and then output to the output port LNA OUT of the transceiver module 20 through the first switch unit 240, and output to the rf transceiver 10, so as to implement the main-set reception of the low-frequency rf signal. The third antenna ANT3 outputs the received low-frequency band rf signal to the first filter selection unit 420 for filtering, and then outputs the low-frequency band rf signal to the second input port PRX of the transceiver module 20, and inputs the low-noise signal to the first amplification unit 410 for low-noise amplification, and then outputs the low-noise signal to the output port LNA OUT of the transceiver module 20 via the first switch unit 240, and outputs the low-frequency band rf signal to the rf transceiver 10, so as to implement master MIMO reception of the low-frequency band 5G rf signal or 4G rf signal.

In this embodiment, the first amplifying unit 410 in the first MIMO receiving module 40 is integrated into the transceiver module 20, so as to further improve the integration level of the device, reduce the board area occupied by the radio frequency system, and reduce the complexity of the system layout.

As shown in fig. 8, in one embodiment, the third amplifying unit 510 in the second MIMO receiving module 50 is integrated into the diversity receiving module 30. The diversity receiving module 30 may be understood as a package structure configured with a transmission port LNA OUT LB for connection with the radio frequency transceiver 10, a third antenna port LB3 ANT for connection with the second antenna ANT2, and a plurality of reception ports DRX for one-to-one connection with a plurality of output terminals of the third filter selecting unit 520.

The diversity receiving module 30 includes a fourth filtering selection unit 310, a fourth amplification unit 320, and a second switching unit 330. A plurality of input terminals of the third amplifying unit 510 are respectively connected to a plurality of receiving ports DRX of the diversity receiving module 30 in a one-to-one correspondence manner. The fourth filtering selection unit 310 is connected to the third antenna port LB3 ANT of the diversity receiving module 30 and the input end of the fourth amplifying unit 320, respectively. The second switch unit 330 includes a plurality of first terminals and a plurality of second terminals, the plurality of first terminals of the second switch unit 330 are respectively connected to the plurality of transmitting ports LNA OUT LB of the diversity receiving module 30 in a one-to-one correspondence, and the plurality of second terminals of the second switch unit 330 are respectively connected to the output terminal of the third amplifying unit 510 and the output terminal of the fourth amplifying unit 320. The fourth filtering selection unit 310 is configured to perform filtering processing on the radio frequency signal in the low frequency band received by the second antenna ANT2 and select and output at least one of a 5G radio frequency signal and a 4G radio frequency signal in the low frequency band. The fourth amplifying unit 320 is configured to perform low-noise amplification processing on the low-band 5G radio frequency signal or 4G radio frequency signal filtered by the fourth filtering selection unit 310. The second switch unit 330 is used for selectively turning on paths between the third amplifying unit 510, the fourth amplifying unit 320 and the transmitting port LNA OUT LB of the diversity receiving module 30.

Specifically, the second antenna ANT2 outputs the received low-frequency band rf signal to the third antenna port LB3 ANT of the diversity receiving module 30, and after filtering processing by the fourth filtering and selecting unit 310, the received low-frequency band rf signal is output to the fourth amplifying unit 320 for low noise amplification processing, and then output to the transmitting port LNA OUT LB of the diversity receiving module 30 by the second switching unit 330, and output to the rf transceiver 10, so as to implement diversity reception of the low-frequency band 5G rf signal or 4G rf signal. The fourth antenna ANT4 outputs the received low-frequency band rf signal to the third filtering selection unit 520 for filtering, outputs the low-frequency band rf signal to the receiving port DRX of the diversity receiving module 30, inputs the low-frequency band rf signal to the third amplification unit 510 for amplification, outputs the low-frequency band rf signal to the transmitting port LNA OUT LB of the diversity receiving module 30 through the second switch unit 330, and outputs the low-frequency band rf signal to the rf transceiver 10, so as to implement diversity MIMO reception of the low-frequency band 5G rf signal or 4G rf signal.

In this embodiment, the third amplifying unit 510 in the second MIMO receiving module 50 is integrated into the diversity receiving module 30, so as to further improve the integration level of the device, reduce the main board area occupied by the radio frequency system, and reduce the complexity of the system layout.

Referring to fig. 9, in one embodiment, the first amplifying unit includes a first low noise amplifier 411 and a first selection switch 412. The first selection switch 412 includes a first terminal and a plurality of second terminals, the first terminal of the first selection switch 412 is connected to the input terminal of the first low noise amplifier 411; a plurality of second terminals of the first selection switch 412 are respectively used as a plurality of input terminals of the first amplifying unit 410, and are respectively used for being connected with a plurality of output terminals of the first filtering selection unit 420 in a one-to-one correspondence manner.

In this embodiment, the first amplifying unit is integrated in the transceiver module 20, and the first selection switch 412 selects a path between different output terminals of the first low noise amplifier 411 and the first filtering selection unit 420, so as to select to perform low noise amplification processing on the 5G radio frequency signals of different frequency bands, thereby saving the number of the first low noise amplifiers 411 and reducing the area of the main board occupied by the devices.

In one embodiment, the third amplifying unit includes at least one second low noise amplifier 511 and a third selection switch 512. The third selection switch 512 includes at least one first terminal and a plurality of second terminals, and the first terminal of the third selection switch 512 is connected to the input terminal of the second low noise amplifier 511; a plurality of second terminals of the third selection switch 512 are respectively used as a plurality of input terminals of the third amplifying unit 510, and are respectively used for being connected with a plurality of output terminals of the third filtering selection unit 520 in a one-to-one correspondence manner.

In this embodiment, the second amplifying unit is integrated in the diversity receiving module 30, and the third selection switch 512 selects a path between different output ends of the second low noise amplifier 511 and the third filtering selection unit 520, so as to select to perform low noise amplification processing on the 5G radio frequency signals of different frequency bands, thereby saving the number of the second low noise amplifiers 511 and reducing the area of the main board occupied by the devices.

Fig. 9 shows an embodiment of a radio frequency system. The transceiver module 20 can be understood as a radio frequency PA Mid device integrated with a first amplifying unit. The radio frequency PA Mid device can support the receiving and the transmitting of low frequency signals of a plurality of frequency bands, and realize the receiving switching control, the transmitting switching control and the switching control between the transmitting and the receiving of the low frequency signals. The plurality of low frequency signals may include low frequency signals of different frequency bands among 2G signals, 3G signals, 4G signals, and 5G signals. Specifically, the frequency bands of the low-frequency signals may include any one of B5, B8, B12, B20, B26, B28A, B28B, B13, and B19. The frequency bands of N5, N8, N20 and N28A in the 5G signal are the same as the frequency bands of B5, B8, B20 and B28A in the 4G signal, and the same receiving path and transmitting path can be shared. The first antenna port L/1ANT of the radio frequency PA Mid device is connected to the first antenna ANT1, one input port 4G LB RFIN of the radio frequency PA Mid device is connected to the radio frequency transceiver 10, a plurality of second input ports PRX1, PRX2, PRX3, and PRX4 of the radio frequency PA Mid device are respectively connected to a plurality of output ports of the first filter selection unit 420 in a one-to-one correspondence manner, at least one output port (LNA OUT1, LNA OUT2, LNA OUT3) of the radio frequency PA Mid device is connected to the radio frequency transceiver 10, the radio frequency PA Mid device is configured to perform filter amplification processing on a low-band radio frequency signal sent by the radio frequency transceiver 10, output the low-band radio frequency signal to the first antenna port LB1ANT, and transmit the low-band radio frequency signal through the first antenna ANT1, so as to implement transmission control on a plurality of low-band radio frequency signals. The first antenna port LB1ANT of the rf PA Mid device is further configured to receive a low-frequency rf signal received by the first antenna ANT1, filter and amplify the low-frequency rf signal, and output the low-frequency rf signal to the rf transceiver 10 through the output port LNA OUT1, LNA OUT2, or LNA OUT3, so as to implement a main set reception control on a plurality of low-frequency signals. The second input ports PRX1, PRX2, PRX3, and PRX4 of the rf PA Mid device are configured to receive the 5G rf signal output by the first filter selecting unit 420 after performing filtering processing on the rf signal received by the third antenna ANT3, perform low noise amplification processing on the 5G rf signal, and output the signal to the rf transceiver 10 through the output port, so as to implement master MIMO receiving control on the 5G rf signals of multiple low frequency bands.

The diversity receiving module 30 may be understood as a radio frequency LFEM device integrated with the second amplifying unit (in fig. 9, a radio frequency LFEM device supporting a low-middle high frequency band is used, and in some embodiments, a radio frequency LFEM device supporting only a low frequency band may also be used). The radio frequency LFEM device can support the receiving of low-frequency signals of a plurality of frequency bands and realize the receiving switching control of the low-frequency signals. The plurality of low-frequency signals may include low-frequency signals of different frequency bands in 4G signals and 5G signals. Specifically, the frequency bands of the low-frequency signals may include any one of B5, B8, B12, B20, B26, B28A, B28B, B13, and B19. N5, N8, N20 and N28A in the 5G signal are the same as B5, B8, B20 and B28A in the 4G signal, respectively, and can share the same receiving path. The third antenna port LB3 ANT of the rf LFEM device is connected to the second antenna ANT2, the multiple receiving ports DRX1, DRX2, DRX3, DRX4 of the rf LFEM device are respectively connected to the multiple output terminals of the third filter selecting unit 520 in a one-to-one correspondence, and the transmitting ports LNA OUT LB1, LNA OUT LB2, and LNA OUT LB3 of the rf LFEM device are respectively connected to the rf transceiver 10. The third antenna port LB3 ANT of the rf LFEM device is configured to receive a low-frequency signal received by the second antenna ANT2, and after performing filtering and amplifying processing on the low-frequency signal, the low-frequency signal is output to the rf transceiver 10 through the transmitting ports LNA OUT LB1, LNA OUT LB2, or LNA OUT LB3, so as to implement diversity reception control on multiple low-frequency signals. The input ports PRX1, PRX2, PRX3, and PRX4 of the rf LFEM device are configured to receive the 5G rf signal output by the third filter selecting unit 520 after performing filter processing on the rf signal of the low frequency band received by the fourth antenna ANT4, amplify the 5G rf signal, and output the amplified signal to the rf transceiver 10 through the transmission port LNA OUT LB1, so as to implement diversity MIMO reception control on the multiple rf signals of the low frequency band.

Through the cooperation of the transceiver module 20 integrated with the first amplifying unit, the diversity receiving module 30 integrated with the third amplifying unit, the first filtering selection unit 420 and the third filtering selection unit 520, a radio frequency system supporting the 4 x 4MIMO reception of the low-frequency band radio frequency signal is constructed, the throughput of the low-frequency band radio frequency signal is improved, the integration level of the device is improved, and the loss of the signal on an external radio frequency line is reduced.

Based on the radio frequency system of the above embodiment, a 4 × 4MIMO function of four antennas can be supported. Illustratively, taking fig. 9 as an example, the operating principle of 4 × 4MIMO function of the N28A frequency band is analyzed:

a TX path:

the transmission signal is output from a TX0 LB1 port of the radio frequency transceiver 10, passes through a radio frequency line, reaches a 4G LB RFIN port of a radio frequency PA Mid device, amplifies the signal by a 4G LB PA, and then reaches a single port of a radio frequency switch SP 9T; the rf switch SP9T switches to contact 9 to the B28A TX path; through the internal radio frequency wire, to the contact 2 of the radio frequency switch SPDT; the radio frequency switch SPDT switches the single port and is connected to the radio frequency switch SP10T through the duplexer; the radio frequency switch SP10T switches a single port to an LB1ANT port; and the signal is output to a first antenna ANT1 through an LB1ANT and transmitted.

PRX path:

the received radio frequency signal enters from a first antenna ANT1 to an LB1ANT port of a radio frequency PA Mid device; rf switch SP10T switches to contact 9, through the duplexer, to the B28A RX path; to rf switch SP6T, rf switch SP6T switches the single port to LNA3 path; after amplification by LNA3, the rf switch 3P3T is switched to contact 1 to the LNA OUT1 port output of the rf PA Mid device; the received rf signal enters the rf transceiver 10 through the SDR PRXE port.

DRX (discontinuous reception) path:

the received radio frequency signal enters from a second antenna ANT2 to an LB3 ANT port of the radio frequency LFEM device; the radio frequency switch SP6T is switched to the contact 4, and is filtered by the filter to the radio frequency switch SP3T # 1; the radio frequency switch SP3T #1 switches to a single port, and the single port is amplified by the LNA1 and then reaches the radio frequency switch 3P 3T; the radio frequency switch 3P3T is switched to the contact 1 to the LNA OUT LB1 port output of the radio frequency LFEM device; the received rf signal enters the rf transceiver 10 through the SDR drx port.

PRX MIMO path:

the received radio frequency signal enters from the third antenna ANT3 to the second selection switch 422 of the first filtering selection unit 420; the second selection switch 422 is switched to the contact 4, and is filtered by the first filter 421 and then output to the PRX4 port of the radio frequency PA Mid device; to the first selection switch 412, the first selection switch 412 is switched to a single port, amplified by the first low noise amplifier 411, and then to the rf switch 3P 3T; the radio frequency switch 3P3T is switched to the contact 3 to the LNA OUT3 port output of the radio frequency PA Mid device; the received rf signal enters the rf transceiver 10 through the SDR PRX1 port.

DRX MIMO path:

the received radio frequency signal enters from the fourth antenna ANT4 to the fourth selection switch 522 of the third filtering selection unit 520; the fourth selection switch 522 is switched to the contact 4, filtered by the second filter 521 and then output to the DRX4 port of the radio frequency LFEM device; to the third selection switch 512, the third selection switch 512 is switched to a single port, amplified by the second low noise amplifier 511, and then to the radio frequency switch 3P 3T; the radio frequency switch 3P3T is switched to the contact 3 to be output from the LNA OUT LB3 port of the radio frequency LFEM device; the received radio frequency signal enters the radio frequency transceiver 10 via the SDR DRX1 port.

As shown in fig. 10, in one embodiment, the first MIMO receiving module 40 is integrated within the transceiver module 20. The transceiver module 20 may be understood as a package structure configured with at least one first input port LB RFIN and a plurality of output ports LNA OUT for connection with the radio frequency transceiver 10, a first antenna port LB1ANT for connection with a first antenna ANT1, and a second antenna port LB2 ANT for connection with a third antenna ANT 3.

The transceiver module 20 includes a transmitting unit 210, a second filtering selection unit 220, a second amplifying unit 230, and a first switch unit 240. The input terminal of the first filter selection unit 420 is connected to the second antenna port LB2 ANT of the transceiver module 20, the transmission unit 210 is connected to the first input port LB RFIN of the transceiver module 20 and the transmission path TX of the second filter selection unit 220, the reception path RX of the second filter selection unit 220 is connected to the input terminal of the second amplification unit 230, and the second filter selection unit 220 is further connected to the first antenna port LB1ANT of the transceiver module 20. The first switch unit 240 includes a plurality of first terminals and a plurality of second terminals, the plurality of first terminals of the first switch unit 240 are respectively connected to the plurality of output ports LNA OUT of the transceiver module 20 in a one-to-one correspondence, the plurality of second terminals of the first switch unit 240 are respectively connected to the output terminal of the first amplifying unit 410 and the output terminal of the second amplifying unit 230, and the plurality of input terminals of the first amplifying unit 410 are respectively connected to the plurality of output terminals of the first filtering selection unit 420 in a one-to-one correspondence. The transmitting unit 210 is configured to receive the low-band radio frequency signal output by the radio frequency transceiver 10, and amplify the received low-band 5G radio frequency signal or 4G radio frequency signal. The second filtering selection unit 220 is configured to perform filtering processing on the low-frequency-band radio frequency signal received by the first antenna ANT1 and select to output at least one low-frequency-band 5G radio frequency signal or 4G radio frequency signal, and is further configured to perform filtering processing on the low-frequency-band radio frequency signal output by the transmitting unit 210 and select to output at least one low-frequency-band 5G radio frequency signal or 4G radio frequency signal to be radiated by the first antenna ANT 1. The second amplifying unit 230 is configured to perform low-noise amplification processing on the low-band radio-frequency signal filtered by the second filtering selection unit 220. The first switch unit 240 is used for selectively turning on paths among the first amplifying unit 410, the second amplifying unit 230 and an output port LNA OUT of the transceiver module 20.

Specifically, the radio frequency transceiver 10 inputs a low-frequency rf signal to the first input port LB RFIN of the transceiver module 20, amplifies the low-frequency rf signal by the transmitting unit 210, outputs the low-frequency rf signal to the second filter selecting unit 220 for filtering, selects at least one low-frequency 5G radio frequency signal or 4G radio frequency signal, outputs the low-frequency 5G radio frequency signal or 4G radio frequency signal to the first antenna port LB1ANT of the transceiver module 20, and transmits the low-frequency rf signal by the first antenna ANT1, so as to implement transmission of the low-frequency rf signal. The first antenna ANT1 outputs the received low-frequency rf signal to the first antenna port LB1ANT of the transceiver module 20, which is filtered by the second filter selection unit 220, and then outputs the low-frequency rf signal to the second amplification unit 230 for amplification, and then outputs the low-frequency rf signal to the output port LNA OUT of the transceiver module 20 via the first switch unit 240, and outputs the low-frequency rf signal to the rf transceiver 10, so as to implement main-set reception of the low-frequency 5G rf signal or 4G rf signal. The third antenna ANT3 outputs the received low-frequency rf signal to the second antenna port LB2 ANT of the transceiver module 20, and after being filtered by the first filter selection unit 420, the received low-frequency rf signal is output to the first amplification unit 410 for low noise amplification, and then output to the output port LNA OUT of the transceiver module 20 through the first switch unit 240, and output to the rf transceiver 10, so as to implement the main-set MIMO reception of the low-frequency 5G rf signal.

In this embodiment, the first MIMO receiving module 40 is integrated into the transceiver module 20, so as to further improve the integration level of the device, reduce the area of the main board occupied by the radio frequency system, and reduce the complexity of the system layout.

As shown in fig. 11, in one embodiment, the second MIMO receiving module 50 is integrated within the diversity receiving module 30. The diversity receiving module 30 may be understood as a package structure configured with a transmission port LNA OUT LB for connection with the radio frequency transceiver 10, a third antenna port LB3 ANT for connection with the second antenna ANT2, and a fourth antenna port LB4 ANT for connection with the fourth antenna ANT 4.

The diversity receiving module 30 includes a fourth filtering selection unit 310, a fourth amplification unit 320, and a second switching unit 330. Wherein, the input terminal of the third filtering selection unit 520 is connected to the fourth antenna port LB4 ANT of the diversity receiving module 30. The fourth filtering selection unit 310 is connected to the third antenna port LB3 ANT of the diversity receiving module 30 and the input end of the fourth amplifying unit 320, respectively. The second switch unit 330 includes a plurality of first terminals and a plurality of second terminals, the plurality of first terminals of the second switch unit 330 are respectively connected to the plurality of transmitting ports LNA OUT LB of the diversity receiving module 30 in a one-to-one correspondence, and the plurality of second terminals of the second switch unit 330 are respectively connected to the output terminal of the third amplifying unit 510 and the output terminal of the fourth amplifying unit 320. A plurality of input terminals of the third amplifying unit 510 are respectively connected to a plurality of output terminals of the third filtering selection unit 520 in a one-to-one correspondence. The fourth filtering selection unit 310 is configured to perform filtering processing on the radio frequency signal in the low frequency band received by the second antenna ANT2 and select and output at least one of a 5G radio frequency signal and a 4G radio frequency signal in the low frequency band. The fourth amplifying unit 320 is configured to perform low noise amplification processing on the 5G radio frequency signal or the 4G radio frequency signal after filtering processing by the fourth filtering selection unit 310. The second switch unit 330 is used for selectively turning on paths between the third amplifying unit 510, the fourth amplifying unit 320 and the transmitting port LNA OUT LB of the diversity receiving module 30.

Specifically, the second antenna ANT2 outputs the received low-frequency band rf signal to the third antenna port LB3 ANT of the diversity receiving module 30, and after filtering processing by the fourth filtering and selecting unit 310, the received low-frequency band rf signal is output to the fourth amplifying unit 320 for amplification, and then output to the transmitting port LNA OUT LB of the diversity receiving module 30 by the second switching unit 330, and output to the rf transceiver 10, so as to implement diversity reception of the low-frequency band 5G rf signal or 4G rf signal. The fourth antenna ANT4 outputs the received low-frequency band rf signal to the fourth antenna port LB4 ANT of the diversity receiving module 30, and after the filtering processing by the third filtering selection unit 520, the received low-frequency band rf signal is output to the third amplification unit 510 for low noise amplification processing, and then output to the transmitting port LNA OUT LB of the diversity receiving module 30 through the second switch unit 330, and output to the rf transceiver 10, so as to implement diversity MIMO reception of the low-frequency band 5G rf signal.

In this embodiment, the second MIMO receiving module 50 is integrated into the diversity receiving module 30, so as to further improve the integration level of the device, reduce the area of the main board occupied by the radio frequency system, and reduce the complexity of the system layout.

Fig. 12 shows an embodiment of a radio frequency system. The transceiver module 20 may be understood as a radio frequency PA Mid device integrated with the first MIMO receiving module. The radio frequency PA Mid device can support the receiving and the transmitting of low frequency signals of a plurality of frequency bands, and realize the receiving switching control, the transmitting switching control and the switching control between the transmitting and the receiving of the low frequency signals. The plurality of low frequency signals may include low frequency signals of different frequency bands among 2G signals, 3G signals, 4G signals, and 5G signals. Specifically, the frequency bands of the low-frequency signals may include any one of B5, B8, B12, B20, B26, B28A, B28B, B13, and B19. The frequency bands of N5, N8, N20 and N28A in the 5G signal are the same as the frequency bands of B5, B8, B20 and B28A in the 4G signal, and the same receiving path and transmitting path can be shared. The first antenna port LB1ANT of the rf PA Mid device is connected to the first antenna ANT1, the second antenna port LB2 ANT of the rf PA Mid device is connected to the third antenna ANT3, one input port 4G LB RFIN of the rf PA Mid device is connected to the rf transceiver 10, and at least one output port (including LNA OUT1, LNA OUT2, and LNA OUT3) of the rf PA Mid device is connected to the rf transceiver 10. The radio frequency PAMid device is configured to perform filtering amplification processing on a radio frequency signal of a low frequency band sent by the radio frequency transceiver 10, output the radio frequency signal to the first antenna port LB1ANT, and transmit the radio frequency signal through the first antenna ANT1, so as to implement transmission control on radio frequency signals of a plurality of low frequency bands. The first antenna port LB1ANT of the rf PA Mid device is further configured to receive a low-frequency rf signal received by the first antenna ANT1, filter and amplify the low-frequency rf signal, and output the low-frequency rf signal to the rf transceiver 10 through the output port, so as to implement a master set reception control on a plurality of low-frequency signals. The second antenna port LB2 ANT of the rf PA Mid device is configured to receive a low-band 5G rf signal received by the third antenna ANT3, filter and amplify the 5G rf signal, and output the signal to the rf transceiver 10 through the output port LNA OUT1, LNA OUT2, or LNA OUT3, so as to implement a master-set MIMO reception control on the multiple low-band 5G rf signals.

The diversity receiving module 30 may be understood as a radio frequency LFEM device integrated with the second MIMO receiving module (in fig. 12, a radio frequency LFEM device supporting a low frequency band and a medium frequency band is used, and in some embodiments, a radio frequency LFEM device supporting only a low frequency band may also be used). The radio frequency LFEM device can support the receiving of low-frequency signals of a plurality of frequency bands and realize the receiving switching control of the low-frequency signals. The plurality of low-frequency signals may include low-frequency signals of different frequency bands in 4G signals and 5G signals. Specifically, the frequency bands of the low-frequency signals may include any one of B5, B8, B12, B20, B26, B28A, B28B, B13, and B19. N5, N8, N20 and N28A in the 5G signal are the same as B5, B8, B20 and B28A in the 4G signal, respectively, and can share the same receiving path. The third antenna port LB3 ANT of the rf LFEM device is connected to the second antenna ANT2, the fourth antenna port LB4 ANT of the rf LFEM device is connected to the fourth antenna ANT4, and the transmitting ports LNA OUT LB1, LNA OUT LB2, and LNA OUT LB3 of the rf LFEM device are respectively connected to the rf transceiver 10. The third antenna port LB1ANT of the rf LFEM device is configured to receive a low-frequency signal received by the second antenna ANT2, and after performing filtering and amplifying processing on the low-frequency signal, the low-frequency signal is output to the rf transceiver 10 through the transmitting ports LNA OUT LB1, LNA OUT LB2, or LNA OUT LB3, so as to implement diversity reception control on multiple low-frequency signals. The fourth antenna port LB4 ANT of the rf LFEM device is configured to receive the 5G rf signal of the low frequency band received by the fourth antenna ANT4, amplify and filter the 5G rf signal of the low frequency band, and output the amplified and filtered signal to the rf transceiver 10 through the transmitting port LNA OUT LB1, so as to implement diversity MIMO reception control on the 5G rf signals of multiple low frequency bands.

Through the cooperation of the transceiver module 20 integrated with the first MIMO receiving module and the diversity receiving module 30 integrated with the second MIMO receiving module, a radio frequency system supporting the 4 × 4MIMO reception of the low-frequency band radio frequency signal is constructed, the throughput of the low-frequency band radio frequency signal is improved, the integration level of the device is improved, and the loss of the signal on an external radio frequency line is reduced.

Based on the radio frequency system of the above embodiment, a 4 × 4MIMO function of four antennas can be supported. Illustratively, taking fig. 12 as an example, the operating principle of 4 × 4MIMO function of the N28A frequency band is analyzed:

a TX path:

the transmission signal is output from a TX0 LB1 port of the radio frequency transceiver 10, passes through a radio frequency line, reaches a 4G LB RFIN port of a radio frequency PA Mid device, amplifies the signal by a 4G LB PA, and then reaches a single port of a radio frequency switch SP 9T; the rf switch SP9T switches to contact 9 to the B28A TX path; through the internal radio frequency wire, to the contact 2 of the radio frequency switch SPDT; the radio frequency switch SPDT switches the single port and is connected to the radio frequency switch SP10T through the duplexer; the radio frequency switch SP10T switches a single port to an LB1ANT port; and the signal is output to an ANT1 antenna for transmission through an LB1ANT port.

PRX path:

DRX (discontinuous reception) path:

PRX MIMO path:

the received radio frequency signal enters from the third antenna ANT3, to the LB2 ANT port of the radio frequency PA Mid device, to the second selection switch 422; the second selection switch 422 is switched to the contact 4, filtered by the first filter 421, and then switched to the first selection switch 412, and the first selection switch 412 is switched to a single port, amplified by the first low noise amplifier 411, and then switched to the radio frequency switch 3P 3T; the radio frequency switch 3P3T is switched to the contact 3 to the LNA OUT3 port output of the radio frequency PA Mid device; the received rf signal enters the rf transceiver 10 through the SDR PRX1 port.

DRX MIMO path:

a received radio frequency signal enters from a fourth antenna ANT4, enters an LB4 ANT port of the radio frequency LFEM device, enters a fourth selection switch 522, is switched to a contact 4 by the fourth selection switch 522, is filtered by a second filter 521, enters a third selection switch 512, is switched to a single port by the third selection switch 512, is amplified by a second low noise amplifier 511, and then enters a radio frequency switch 3P 3T; the radio frequency switch 3P3T is switched to the contact 3 to be output from the LNA OUT LB3 port of the radio frequency LFEM device; the received radio frequency signal enters the radio frequency transceiver 10 via the SDR DRX1 port.

Each filter in the embodiment of the present application may be a band pass filter, a low pass filter, or the like. It should be noted that, in the embodiment of the present application, the type of each filter is not further limited, and an appropriate filter may be selected according to the frequency band of the low-frequency signal to be filtered.

As shown in fig. 13, an embodiment of the present application further provides a communication device, where the communication device is provided with the radio frequency system in any of the above embodiments.

By arranging the radio frequency system on the communication equipment, the throughput of the radio frequency system to low-frequency band radio frequency signals is improved, the devices have high integration level, the area of each device in the radio frequency system, which occupies a substrate, can be reduced, meanwhile, the power supply, logic control and PCB (printed circuit board) layout and wiring of each device can be simplified, and the cost is saved.

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

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

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

Claims

1. A radio frequency system, comprising:

a radio frequency transceiver;

2. The radio frequency system according to claim 1, wherein the low band radio frequency signal comprises a plurality of 5G radio frequency signals of different bands.

3. The radio frequency system of claim 2, wherein the first MIMO receiving module comprises:

the input end of the first filtering selection unit is connected with the third antenna and is used for filtering the radio-frequency signals received by the third antenna and selectively outputting 5G radio-frequency signals of at least one frequency band;

and a plurality of input ends of the first amplifying unit are respectively connected with a plurality of output ends of the first filtering selection unit in a one-to-one correspondence manner, and an output end of the first amplifying unit is connected with the radio frequency transceiver and is used for performing low-noise amplification processing on the 5G radio frequency signal output by the first filtering selection unit.

4. The radio frequency system according to claim 3, wherein the first MIMO receive module is configured with an antenna port for connecting the third antenna and an output port for connecting the radio frequency transceiver;

the input end of the first filtering selection unit is connected with the antenna port of the first MIMO receiving module;

and the output end of the first amplifying unit is connected with the output port of the first MIMO receiving module.

5. The radio frequency system according to claim 3, wherein the first amplifying unit is integrated into the transceiving module; the transceiver module is configured with a first input port and a plurality of output ports for connection with the radio frequency transceiver, a first antenna port for connection with the first antenna, and a plurality of second input ports for one-to-one connection with a plurality of output ports of the first filter selection unit; a plurality of input ends of the first amplifying unit are respectively connected with a plurality of second input ports of the transceiver module;

the transceiver module includes:

the transmitting unit is connected with the first input port of the transceiving module and used for receiving the low-frequency-band radio-frequency signal output by the radio-frequency transceiver and amplifying the received low-frequency-band radio-frequency signal;

the second filtering selection unit is respectively connected with the transmitting unit and the first antenna port of the transceiver module and is used for filtering the radio-frequency signals received by the first antenna and selectively outputting 5G radio-frequency signals of at least one frequency band; the antenna is also used for filtering the low-frequency-band radio-frequency signals output by the transmitting unit and selecting and outputting at least one frequency-band 5G radio-frequency signal to be radiated by the first antenna;

the input end of the second amplifying unit is connected with the second filtering selection unit and is used for performing low-noise amplification processing on the 5G radio frequency signal subjected to filtering processing by the second filtering selection unit;

and the first switch unit is respectively connected with the output end of the first amplifying unit, the output end of the second amplifying unit and the output port of the transceiver module and is used for selectively conducting the paths among the first amplifying unit, the second amplifying unit and the output port of the transceiver module.

6. The radio frequency system of claim 3, wherein the first MIMO receiving module is integrated within the transceiving module; the transceiver module is configured with a first input port and a plurality of output ports for connection with the radio frequency transceiver, a first antenna port for connection with the first antenna, and a second antenna port for connection with the third antenna; the input end of the first filtering selection unit is connected with a second antenna port of the transceiver module;

the transceiver module includes:

the input end of the second amplifying unit is connected with the second filtering selection unit and is used for carrying out low-noise amplification processing on the 5G radio frequency signal after the filtering processing of the second filtering unit;

7. The radio frequency system according to any one of claims 5 or 6, wherein the transmitting unit is further configured to receive a low-frequency-band 4G radio frequency signal output by the radio frequency transceiver, and amplify the received 4G radio frequency signal;

the second filtering selection unit is further configured to perform filtering processing on the low-frequency-band radio-frequency signal received by the first antenna and select and output a 4G radio-frequency signal of at least one frequency band; the antenna is also used for filtering the 4G radio frequency signals output by the transmitting unit and selecting and outputting 4G radio frequency signals of at least one frequency band to be radiated by the first antenna;

and the second amplifying unit is also used for carrying out low-noise amplification processing on the 4G radio frequency signal after the filtering processing of the second filtering unit.

8. The radio frequency system according to claim 3, wherein the first amplification unit comprises:

the output end of the first low-noise amplifier is used as the output end of the first amplifying unit and is used for amplifying the 5G radio-frequency signal output by the first filtering selection unit;

and the first selection switch comprises at least one first end and a plurality of second ends, the first end of the first selection switch is connected with the input end of the first low noise amplifier, the plurality of second ends of the first selection switch are respectively used as a plurality of input ends of the first amplifying unit, and the first selection switch is used for selectively conducting a path between any one output end of the first filtering selection unit and the first low noise amplifier.

9. The radio frequency system according to claim 3, wherein the first amplification unit comprises:

a plurality of first low noise amplifiers, an input end of each of the first low noise amplifiers being a plurality of input ends of the first amplifying unit, respectively;

the first end of the first selection switch is used as the output end of the first amplification unit, and a plurality of second ends of the first selection switch are respectively connected with the output ends of the first low noise amplifiers in a one-to-one correspondence manner; the first selection switch is used for selectively conducting a path between any one output end of the first amplification unit and the first low noise amplifier.

10. The radio frequency system according to claim 3, wherein the first filter selecting unit comprises:

the first filters are respectively connected with the input ends of the first amplifying units in a one-to-one correspondence manner and are used for filtering the radio-frequency signals received by the third antenna and outputting 5G radio-frequency signals with different frequency bands;

and the second selector switch comprises a plurality of first ends and a second end, the plurality of first ends of the second selector switch are respectively connected with the plurality of first filters in a one-to-one correspondence manner, and the second end of the second selector switch is used as the input end of the first filtering selection unit.

11. The radio frequency system of claim 2, wherein the second MIMO receiving module comprises:

the input end of the third filtering selection unit is connected with the fourth antenna and is used for filtering the radio-frequency signals received by the fourth antenna and selectively outputting 5G radio-frequency signals of at least one frequency band;

and a plurality of input ends of the third amplifying unit are respectively connected with a plurality of output ends of the third filtering selection unit in a one-to-one correspondence manner, and an output end of the third amplifying unit is connected with the radio frequency transceiver and is used for performing low-noise amplification processing on the 5G radio frequency signal output by the third filtering selection unit.

12. The radio frequency system according to claim 11, wherein the second MIMO receiving module is configured with an antenna port for connecting the fourth antenna and an output port for connecting the radio frequency transceiver;

the input end of the third filtering selection unit is connected with the antenna port of the second MIMO receiving module;

and the output end of the third amplifying unit is connected with the output port of the second MIMO receiving module.

13. The radio frequency system according to claim 11, wherein the third amplification unit is integrated within the diversity reception module; the diversity receiving module is configured with a plurality of transmitting ports for connecting with the radio frequency transceiver, a third antenna port for connecting with the second antenna and a plurality of receiving ports for connecting with a plurality of output ends of the third filtering selection unit in a one-to-one correspondence manner; a plurality of input ends of the third amplifying unit are respectively connected with a plurality of receiving ports of the diversity receiving module in a one-to-one correspondence manner;

the diversity reception module includes:

the fourth filtering selection unit is connected with a third antenna port of the diversity reception module and used for filtering the radio-frequency signals received by the second antenna and selectively outputting 5G radio-frequency signals of at least one frequency band;

the input end of the fourth amplifying unit is connected with the fourth filtering selection unit and is used for performing low-noise amplification processing on the 5G radio-frequency signal subjected to filtering processing by the fourth filtering selection unit;

and the second switch unit is respectively connected with the output end of the third amplifying unit, the output end of the fourth amplifying unit and the output port of the diversity receiving module and is used for selectively conducting a path between the third amplifying unit, the fourth amplifying unit and the output port of the diversity receiving module.

14. The radio frequency system of claim 11, wherein the second MIMO receiving module is integrated within the diversity receiving module; the diversity receive module is configured with a transmit port for connection with the radio frequency transceiver, a third antenna port for connection with the second antenna, and a fourth antenna port for connection with the fourth antenna; the input end of the third filtering selection unit is connected with a fourth antenna port of the diversity reception module;

the diversity reception module includes:

the fourth filtering selection unit is connected with the first antenna port of the diversity reception module and is used for filtering the radio-frequency signals received by the second antenna and selectively outputting 5G radio-frequency signals of at least one frequency band;

the input end of the fourth amplifying unit is connected with the fourth filtering selection unit and is used for performing low-noise amplification processing on the 5G radio-frequency signal after filtering processing by the fourth filtering unit;

15. The radio frequency system according to claim 11, wherein the third amplification unit comprises:

the output end of the second low-noise amplifier is used as the output end of the third amplifying unit and is used for performing low-noise amplification processing on the radio-frequency signal output by the third filtering selection unit;

and the third selection switch comprises at least one first end and a plurality of second ends, the first end of the third selection switch is connected with the input end of the second low noise amplifier, the plurality of second ends of the third selection switch are respectively used as a plurality of input ends of the third amplification unit, and the third selection switch is used for selectively conducting a path between any one output end of the third filtering selection unit and the second low noise amplifier.

16. The radio frequency system according to claim 11, wherein the third amplification unit comprises:

a plurality of second low noise amplifiers, an input terminal of each of the second low noise amplifiers being a plurality of input terminals of the third amplifying unit, respectively;

a third selection switch, including at least one first end and a plurality of second ends, where the first end of the third selection switch is used as the output end of the third amplification unit, and the plurality of second ends of the third selection switch are respectively connected with the output ends of the plurality of second low noise amplifiers in a one-to-one correspondence; the third selection switch is used for selectively conducting a path between any one output end of the third amplification unit and the second low noise amplifier.

17. The radio frequency system according to claim 11, wherein the third filter selecting unit comprises:

the second filters are respectively connected with the input ends of the third amplifying unit in a one-to-one correspondence manner and are used for filtering the radio-frequency signals received by the fourth antenna and outputting 5G radio-frequency signals with different frequency bands;

and the fourth selector switch comprises a plurality of first ends and a second end, the plurality of first ends of the fourth selector switch are respectively connected with the plurality of second filters in a one-to-one correspondence manner, and the second end of the fourth selector switch is used as the input end of the third filtering selection unit.

18. A communication device comprising a radio frequency system according to any one of claims 1 to 17.