CN217159692U

CN217159692U - Radio frequency system and communication device

Info

Publication number: CN217159692U
Application number: CN202122992677.6U
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: 2022-08-09
Anticipated expiration: 2031-11-30

Abstract

The present application provides a radio frequency system and a communication device, wherein, the radio frequency system includes: a radio frequency transceiver and a transceiver module, wherein the transceiver module is configured with a first antenna port connected with a first antenna, a second antenna port connected with a second antenna, a first input port connected with the radio frequency transceiver, a second input port, a first output port, a second output port, wherein the transceiver module comprises: the first transceiving circuit is respectively connected with the first input port, the first output port and the first antenna port and is used for supporting receiving and transmitting processing of the first low-frequency signal; the second transceiver circuit is respectively connected with the second input port, the second output port and the second antenna port and is used for supporting receiving and transmitting processing of the first low-frequency signal.

Description

Radio frequency system and communication device

Technical Field

The present application 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 mobile communication technology is gradually applied to communication devices, such as mobile phones, etc., which have built-in radio frequency systems. The conventional radio frequency system has poor transmission performance for low frequency signals (e.g., N28A or B28A frequency band signals) at the edge of a cell, deep in a building or in an area with poor signals such as an elevator.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a radio frequency system and communication equipment, which can realize double-path transmission of low-frequency signals and enable the radio frequency system to have better transmission performance.

A radio frequency system, comprising:

a radio-frequency transceiver for receiving and transmitting radio-frequency signals,

a transceiver module configured with a first input port, a second input port, a first output port, and a second output port respectively connected with the radio frequency transceiver, a first antenna port connected with a first antenna, and a second antenna port connected with a second antenna; wherein the transceiver module comprises:

the first transceiver circuit is respectively connected with the first input port, the first output port and the first antenna port, and is used for supporting receiving and transmitting processing of a first low-frequency signal;

and the second transceiving circuit is respectively connected with the second input port, the second output port and the second antenna port and is used for supporting the receiving and transmitting processing of the first low-frequency signal.

An embodiment of the present application provides a communication device, including the radio frequency system as described above.

The radio frequency system comprises a radio frequency transceiver and a transceiver module, wherein the transceiver module comprises a first transceiver circuit and a second transceiver circuit, and the transceiver module can cooperate with a first antenna and a second antenna to support two-way transmission processing and two-way reception processing of a first low-frequency signal, so that an uplink 2 x 2MIMO function and a downlink 2 x 2MIMO receiving function of the first low-frequency signal can be realized, compared with a single-way transmission radio frequency system, the uplink rate can be doubled, the uplink coverage distance is doubled, and the channel capacity and the transmission performance of the radio frequency system can be doubled. In addition, by arranging two transceiver circuits in the transceiver Module, the configuration requirement for dual-path transmission of the first low-frequency signal can be avoided by adopting a plurality of discrete Multimode Power Amplifier (MMPA), so that the integration level of the transceiver Module can be improved to improve the integration level of a radio frequency system, and the cost can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description 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 block diagram of an embodiment of a radio frequency system;

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

FIG. 3 is a block diagram of a transceiver module in one embodiment;

FIG. 4 is a block diagram of a transceiver module in another embodiment;

FIG. 5 is a third block diagram of the RF system in one embodiment;

FIG. 6 is a block diagram of an RF system in accordance with an embodiment;

FIG. 7 is a block diagram of an embodiment of an RF system;

FIG. 8 is a sixth block diagram of the RF system in one embodiment;

FIG. 9 is a seventh block diagram illustrating the architecture of the RF system in one embodiment;

FIG. 10 is an eighth schematic block diagram of an exemplary RF system;

FIG. 11 is a block diagram of the structure of a receive module in one embodiment;

FIG. 12 is a ninth block diagram illustrating the architecture of the RF system in one embodiment;

fig. 13 is a block diagram of a communication device in one 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 of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, 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.

In one embodiment, as shown in fig. 1, the present application provides a radio frequency system. The radio frequency system includes: a transceiving module 10, a radio frequency transceiver 20, a first antenna Ant1, and a second antenna Ant 2. In this embodiment, the first antenna Ant1 and the second antenna Ant2 can both support the transceiving of radio frequency signals in different frequency bands. Each branch antenna may be formed using any suitable type of antenna. For example, each branch antenna may include an antenna with a resonating element formed from the following antenna structure: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and frequency band combinations. In the embodiment of the present application, the types of the first antenna Ant1 and the second antenna Ant2 are not further limited.

The transceiver module 10 is configured with: a first input port LB RFIN1, a second input port LB RFIN2, a first output port LNAOUT1, a second output port LNA OUT2 connected with the radio frequency transceiver 20, a first antenna port Ant1 connected with the first antenna Ant1, and a second antenna port Ant2 for connection with the second antenna Ant 2. In the embodiment of the present application, the transceiver Module 10 may be a Low-frequency Power amplifier Module (Low Band Power amplifier Module integrated multiplexer With LNA, L-PAMID) With a built-in Low noise amplifier, which is abbreviated as an L-PAMID device.

The radio frequency transceiver module 10 includes: a first transceiver circuit 110 and a second transceiver circuit 120. The first transceiver circuit 110 is respectively connected to the first input port LB RFIN1, the first output port LNA OUT1, and the first antenna port ANT1, and is configured to support receiving and transmitting processing of the first low-frequency signal. The first transceiver circuit 110 may perform power amplification and filtering on the first low-frequency signal output through the first input port LB RFIN1, and output the first low-frequency signal to the first antenna port ANT1, so as to implement transmission of the first low-frequency signal. In addition, the first low frequency signal received through the first antenna port ANT1 may be filtered and low noise amplified, and output to the radio frequency transceiver 20 through the first output port LNAOUT1, so as to implement reception of the first low frequency signal. And a second transceiver circuit 120, respectively connected to the second input port LB RFIN2, the second output port LNA OUT2, and the second antenna port ANT2, for supporting receiving and transmitting the first low-frequency signal. The second transceiver circuit 120 may perform power amplification and filtering on the first low-frequency signal output through the second input port LB RFIN2, and output the first low-frequency signal to the second antenna port ANT2, so as to implement transmission of the first low-frequency signal. In addition, the first low-frequency signal received through the second antenna port ANT2 may be filtered and low-noise amplified, and output to the radio frequency transceiver 20 through the second output port LNAOUT2, so as to implement reception of the first low-frequency signal. It is understood that the first transceiver circuit 110 and the second transceiver circuit 120 in the L-PAMID device may support a two-way transmission process and a two-way reception process for the first low frequency signal in cooperation with the first antenna Ant1 and the second antenna Ant 2.

In an embodiment of the present application, the first low frequency signal may include one of a 4G LTE low frequency signal and a 5G NR low frequency signal. The frequency division of the first low-frequency signal is shown in table 1.

TABLE 1 frequency band division table for first low frequency signal

It should be noted that, in the 5G network, the frequency band used by 4G is used, only the identifier before the serial number is changed, and the plurality of low frequency bands of the low frequency signal are not limited to the above example.

For example, if the low frequency signal is an N28A band signal, the rf system may support transmit diversity and uplink 2 x 2MIMO function and downlink 2 x 2MIMO receiving function for the N28A band signal. If the low frequency signals include B20 band signals, the rf system may support transmit diversity and uplink 2 x 2MIMO functions and downlink 2 x 2MIMO receiving functions for B20 band signals.

In the embodiment of the present application, the radio frequency system includes a radio frequency transceiver and a transceiver module, where the transceiver module includes a first transceiver circuit and a second transceiver circuit, and the transceiver circuit can cooperate with the first antenna and the second antenna to support a dual-channel transmission process and a dual-channel reception process on the first low-frequency signal, so as to implement an uplink 2 x 2MIMO function and a downlink 2 x 2MIMO reception function on the first low-frequency signal. In addition, in the embodiment of the present application, two transceiver circuits are disposed in the transceiver module, so that the configuration requirement for two-way transmission of the first low-frequency signal by using a plurality of discrete MMPA devices can be avoided, the integration level of the transceiver module 10 can be further improved to improve the integration level of the radio frequency system, and the cost can be reduced.

As shown in fig. 2, in one embodiment, the radio frequency system further includes: and the receiving module 30 is respectively connected with the radio frequency transceiver 20, the third antenna Ant3 and the fourth antenna Ant 4. Wherein, the receiving module 30 may be configured to support two-way reception of the first low-frequency signal. That is, the receiving module 30 is configured with two receiving paths, wherein one receiving path is configured to be connected to the third antenna Ant3 and used for supporting the receiving process of the first low-frequency signal, and the other receiving path is configured to be connected to the fourth antenna Ant4 and used for supporting the receiving process of the low-frequency signal. It is understood that the receiving module 30 may support a two-way receiving process of the first low frequency signal in cooperation with the third antenna Ant3 and the fourth antenna Ant 4. For example, if the low frequency signal is an N28A band signal, the rf system may support transmit diversity and uplink 2 × 2MIMO function and downlink 4 × 4MIMO receiving function for the N28A band signal. If the low frequency signals include B20 band signals, the rf system can support transmit diversity and uplink 2 x 2MIMO functions and downlink 4 x 4MIMO receiving functions for B20 band signals.

In the embodiment of the application, the radio frequency system comprises a radio frequency transceiver, a transceiver module and a receiving module, wherein the transceiver module comprises a first transceiver circuit and a second transceiver circuit, and the first transceiver circuit and the second transceiver circuit can cooperate with a first antenna and a second antenna to support two-way transmission processing and two-way receiving processing of a first low-frequency signal; the receiving module 30 may cooperate with the third antenna and the fourth antenna, and may support the dual-channel receiving processing of the first low-frequency signal, so as to implement the uplink 2 × 2MIMO function and the downlink 4 × 4MIMO receiving function of the first low-frequency signal, and compared with a radio frequency system that only can support the reception and single-channel transmission of the low-frequency signal 2 × 2MIMO in the related art, the downlink communication rate may be doubled, the uplink communication rate may be doubled, and the uplink coverage distance may be doubled, so as to improve the channel capacity and the receiving and transmitting performance of the radio frequency system by multiple times. In addition, in the embodiment of the present application, two transceiver circuits are disposed in the transceiver module, so that the configuration requirement for two-way transmission of the first low-frequency signal by using a plurality of discrete MMPA devices can be avoided, the integration level of the transceiver module 10 can be further improved to improve the integration level of the radio frequency system, and the cost can be reduced.

As shown in fig. 3, in one embodiment, the first transceiver circuit 110 includes a first power amplifier 111, a first low noise amplifier 112, and a first duplexer 113. The first power amplifier 111 is configured to support power amplification of the first low frequency signal. The first low noise amplifier 112 is used to support low noise amplification of the first low frequency signal. The first duplexer 113 may filter the received signal, output only the first low frequency signal, and separate a transceiving path of the low frequency signal according to a signal direction of the low frequency signal.

Specifically, an input end of the first power amplifier 111 is connected to the first input port LB RFIN1, an output end of the first low noise amplifier 112 is connected to the first output port LNA OUT1, two first ends of the first duplexer 113 are respectively connected to the output end of the first power amplifier 111 and the input end of the first low noise amplifier 112 in a one-to-one correspondence, and a second end of the first duplexer 113 is connected to the first antenna port ANT 1. The first duplexer 113 built in the transceiver module 10 may perform filtering processing on the first low-frequency signal after power amplification processing, and output the first low-frequency signal after filtering processing to the first antenna port ANT1, so as to implement transmission processing on the first low-frequency signal. In addition, the first duplexer 113 may further perform filtering processing on the first low-frequency signal received by the first antenna port ANT1 and output the first low-frequency signal to the first low-noise amplifier 112, where the first low-noise amplifier 112 may perform low-noise amplification processing on the first low-frequency signal output by the first duplexer 113 to implement receiving processing on the first low-frequency signal.

In this embodiment, the first duplexer is embedded in the transceiver module, so that the integration level of the transceiver module can be further improved, the occupied area is reduced, the transceiver module only needs to be packaged once, the cost can be reduced, in addition, the port matching among the devices can be realized in the transceiver module, the port mismatch is reduced, and the communication performance of the radio frequency system can be further improved.

With continued reference to fig. 3, in one embodiment, the second transceiver circuit 120 may support transmit and receive processing of a first low frequency signal, and may also support transmit and receive processing of a plurality of second low frequency signals. Wherein the second low frequency signal may comprise a 4G low frequency signal and/or a 5G low frequency signal. For example, the plurality of second low frequency signals may include radio frequency signals of B12, B8, B20, B26, and the like. The frequency bands of the first low-frequency signal and the second low-frequency signals are different.

The second transceiver circuit 120 includes: a transmitting amplifying unit 121, a filtering unit 122, a first receiving amplifying unit 123, and a first switching unit 124. The input end of the transmission amplifying unit 121 is connected to the second input port LB RFIN2, and the output end of the transmission amplifying unit 121 is respectively connected to the filtering unit 122, and is configured to perform power amplification processing on the first low-frequency signal and the plurality of second low-frequency signals received through the second input port LB RFIN 2.

As shown in fig. 4, the filtering unit 122 may include a plurality of filtering subunits 1221, and each filtering subunit 1221 may perform filtering processing on the signal output by the transmitting amplifying unit 121 to output the first low frequency signal and the second low frequency signal of different frequency bands to the first receiving amplifying unit 123. The transmitting and amplifying unit 121 may include a second power amplifier 1211 and a first switch 1212. An input terminal of the second power amplifier 1211 is used as an input terminal of the transmission amplification unit 121 and is connected to the second input port LB RFIN2, an output terminal of the second power amplifier 1211 is connected to a first terminal of the first switch 1212, a plurality of second terminals of the first switch 1212 are used as output terminals of the transmission amplification unit 121, and a plurality of second terminals of the first switch 1212 are connected to the plurality of filtering sub-units 1221 in a one-to-one correspondence manner, so as to selectively turn on a radio frequency path between the second power amplifier 1211 and any one of the filtering sub-units 1221.

The input end of the first receiving and amplifying unit 123 is connected to the filtering unit 122, and the output end of the first receiving and amplifying unit 123 is connected to the second output port LNAOUT2, and is configured to perform low-noise amplification processing on the second low-frequency signal and the plurality of second low-frequency signals output by the filtering unit 122, and output the second low-frequency signal and the plurality of second low-frequency signals subjected to low-noise amplification processing to the second output port LNA OUT 2. The first receiving and amplifying unit 123 may include a second low noise amplifier 1231 and a second switch 1232. The output end of the second low noise amplifier 1231 is used as the output end of the first receiving amplifying unit 123 and connected to the second output port LNA OUT2, the input end of the second low noise amplifier 1231 is connected to the first end of the second switch 1232, the second ends of the second switch 1232 are used as the input end of the first receiving amplifying unit 123, and the second ends of the second switch 1232 are connected to the one-to-one correspondence of the filtering subunits 1221, so as to selectively turn on the radio frequency path between the second low noise amplifier 1231 and any of the filtering subunits 1221.

A plurality of first terminals of the first switch unit 124 are connected to the plurality of filtering sub-units 1221 in the filtering unit 122, and a second terminal of the first switch unit 124 is connected to the second antenna port ANT 2. The first switch unit 124 is used to selectively turn on the rf path between any one of the filtering sub-units 1221 and the second antenna port ANT2, respectively.

In one embodiment, the filtering subunit 1221 may be a duplexer or two filters. For convenience of description, in the embodiment of the present application, the filtering subunit 1221 is taken as an example of a duplexer. Two first terminals of each duplexer are respectively connected to the first switch 1212 and the second switch 1232, and a common terminal of the duplexer is connected to the first terminal of the first switch unit 124.

In one embodiment, the transceiver module 10 is further configured with a plurality of auxiliary ports, for example, including auxiliary ports LNA _ AUX1 and LNA _ AUX2 for receiving external filtering processing, and auxiliary ports LB TXOUT1, LB TXOUT2, LB TXOUT3, LB _ TRX1, LB _ TRX2, LB _ TRX3 for connecting external duplexers. The transceiver module 10 further includes a switch 115 respectively connected to the first low-noise amplifier 112, the auxiliary ports LNA _ AUX1, and LNA _ AUX2, where the auxiliary ports LNA _ AUX1 and LNA _ AUX2 may receive the other low-frequency signals after filtering, and output the other low-frequency signals to the first low-noise amplifier 112 for low-noise amplification, so as to implement reception processing of the other low-frequency signals.

In this embodiment, the second transceiver circuit may support reception and transmission processing of a first low-frequency signal, may also support reception and transmission processing of a plurality of second low-frequency signals, and may also expand communication performance of the transceiver module for low-frequency signals.

As shown in fig. 5 and 6, in one embodiment, the rf system further includes a first coupling unit 114 disposed on the rf path between the second end of the first duplexer 113 and the first antenna Ant 1. The first coupling unit 114 is configured to couple the first low-frequency signal after power amplification and filtering, and output a first coupling signal from an output end of the first coupling unit 114. The first coupling signal is used for detecting power information of the first low-frequency signal. Specifically, the first coupled signal includes a first forward coupled signal and a first backward coupled signal, and forward power information of the first low-frequency signal can be detected based on the first forward coupled signal; based on the first reverse coupled signal, reverse power information of the first low frequency signal may be correspondingly detected.

In one embodiment, please continue to refer to fig. 5, the first coupling unit 114 is externally disposed on the transceiver module 10. The first coupling unit 114 is disposed between the first antenna port ANT1 and the first antenna ANT1, and is configured to couple the first low frequency signal output through the first antenna port ANT1 to output a first coupled signal. The first coupling signal output from the output terminal of the first coupling unit 114 is directly transmitted to the rf transceiver 20, so as to implement the power information detection of the first low frequency signal.

In one embodiment, with continued reference to fig. 6, the first coupling unit 114 may also be integrated inside the transceiver module 10. The transceiver module 10 is also configured with a first coupling output port CPLOUT1 for chain connection with the radio frequency transceiver 20. The first coupling unit 114 is disposed on a radio frequency path between the second end of the first duplexer 113 and the first antenna port ANT1, and is configured to couple the first low-frequency signal filtered by the first duplexer 113 and output a first coupling signal to the first coupling output port CPLOUT 1. That is, the first coupling signal outputted from the output terminal of the first coupling unit 114 can be transmitted to the rf transceiver 20 through the first coupling output port CPLOUT1, so as to implement the power information detection of the first low frequency signal.

In this embodiment, the first coupling unit 114 is built in the transceiver module 10, so that the integration level of the transceiver module 10 can be further improved, the cost can be reduced, in addition, the port matching between the devices in the transceiver module 10 can be realized, the port mismatch can be reduced, and the communication performance of the transceiver module 10 can be further improved.

With continued reference to fig. 5 and 6, in one embodiment, the transceiver module 10 is further configured with a second coupling output port CPLOUT2 for connection with the radio frequency transceiver 20. Wherein the second transceiver circuit 120 further comprises a second coupling unit 125 disposed on the radio frequency path between the second end of the first switch unit 124 and the second antenna port ANT 2. The second coupling unit 125 is configured to couple the first low-frequency signal after power amplification and filtering, and output a second coupling signal to the second coupling output port CPLOUT 2. That is, the second coupled signal output by the output terminal of the second coupling unit 125 can be transmitted to the rf transceiver 20 through the second coupled output port CPLOUT2, so as to implement the power information detection of the first low frequency signal and the plurality of second low frequency signals. It should be noted that the number of the second coupling signals may be multiple, and the second coupling signals may include a coupling signal corresponding to the first low-frequency signal and a coupling signal corresponding to each second low-frequency signal. Each second coupling signal comprises a second forward coupling signal and a second backward coupling signal, and forward power information of the second low-frequency signal or the second low-frequency signal can be detected based on the second forward coupling signal; based on the second reverse coupling signal, the second low frequency signal or reverse power information of the second low frequency signal may be correspondingly detected.

Optionally, the second coupling unit may also be disposed between the second antenna port and the second antenna, and is configured to couple the first low-frequency signal output through the second antenna port to output a second coupled signal. And the second coupling signal output by the output end of the second coupling unit is directly transmitted to the radio frequency transceiver so as to realize the power information detection of the first low-frequency signal.

As shown in fig. 7, 8 and 9, in one embodiment, the rf system further includes a switch module 40. In particular, the switch module 40 may be a single pole double throw switch. Two first ends of the switch module 40 are respectively connected to the output end of the first coupling unit 114 and the second coupling output port CPLOUT2 in a one-to-one correspondence manner, and a second end of the switch module 40 is connected to the rf transceiver 20, and is configured to selectively conduct coupling feedback paths between the first coupling unit 114 and the rf transceiver 20 and between the second coupling unit 125 and the rf transceiver 20, so as to selectively output the first coupling signal and the second coupling signal to the rf transceiver 20. It should be noted that a first end of the switch module 40 may be directly or indirectly connected to the output end of the first coupling unit 114.

In one embodiment, referring to fig. 7, when the first coupling unit 114 is externally disposed on the transceiver module 10, a first end of the switch module 40 may be directly connected to the output end of the first coupling unit 114. Two first ends of the switch module 40 are respectively connected to the output end of the first coupling unit 114 and the second coupling output port CPLOUT2, and a second end of the switch module 40 is connected to the rf transceiver 20.

In one embodiment, with reference to fig. 8, when the first coupling unit 114 is embedded in the transceiver module 10, a first end of the switch module 40 may be indirectly connected to the output end of the first coupling unit 114. For example, it may be connected to the output of the first coupling unit 114 through a first coupling output port CPLOUT 1. Specifically, two first ends of the switch module 40 are respectively connected to the first coupling output port CPLOUT1 and the second coupling output port CPLOUT2, and a second end of the switch module 40 is connected to the rf transceiver 20.

In the embodiment of the application, by providing the switch module, the coupling feedback paths between the first coupling unit and the rf transceiver can be selectively conducted, so as to selectively output the first coupling signal and the second coupling signal to the rf transceiver. Therefore, the situation that two feedback radio frequency wires are adopted to respectively feed back the first coupling signal and the second coupling signal to the radio frequency transceiver can be avoided, the length of the feedback radio frequency wires can be shortened, the complexity of the layout of a radio frequency system is reduced, meanwhile, the area of a PCB occupied by the radio frequency system is reduced, and the cost is reduced.

With continued reference to fig. 7-9, in one embodiment, transceiver module 10 is further configured with a coupling input port CPLIN for receiving an externally coupled signal. The second transceiver circuit 120 further includes a second switch unit 126. Specifically, two first ends of the second switch unit 126 are respectively connected to the output end of the second coupling unit 125 and the coupling input port CPLIN, and a second end of the second switch unit 126 is connected to the second coupling output port CPLOUT 2. The second switch unit 126 may output the second coupling signal to the second coupling output port CPLOUT2, and may also output the external coupling signal input through the coupling input port CPLIN to the second coupling output port CPLOUT2 for transmission to the rf transceiver 20. Illustratively, the second switch unit 126 may be a single-pole double-throw switch.

For convenience of explanation, the coupled signal feedback link of the first coupled signal and the second coupled signal is explained based on the rf system as shown in fig. 7 and fig. 8.

Feedback link of the first coupled signal:

when detecting the forward power, contact 1 of the DPDT switch in the first coupling unit 114 is tangent to contact 2, contact 3 is tangent to contact 4; when reverse power is detected, the DPDT switch in the first coupling unit 114, contact 1 to contact 4, contact 3 to contact 2, are transmitted to the switch module 40 and then to the rf transceiver 20.

Feedback link of the second coupled signal:

when the forward power is detected, a contact 1 of a DPDT switch in the second coupling unit is tangent to a contact 2, and a contact 3 is tangent to a contact 4; when the reverse power is detected, a DPDT switch in the second coupling unit, a contact 1 is tangent to a contact 4, and a contact 3 is tangent to a contact 2; a contact 2 in the second switch unit 126 is tangential to a contact 1, so that a power detection path of the second coupling signal is conducted; through the switch module 40, to the rf transceiver 20.

In this embodiment, by setting the coupling input port CPLIN, the second coupling unit 125 of the transceiver module 10 can be used as a radio frequency feedback path, and receive external coupling signals of other devices through the coupling input port CPLIN, and output the external coupling signals through the second coupling output port CPLOUT2, so as to shorten the routing length of radio frequency, reduce the complexity of the layout of the radio frequency system, reduce the area of the PCB occupied by the radio frequency system, and reduce the cost.

Alternatively, the second switch unit 126 may include three first terminals and one second terminal, and the second switch unit 126 may be an SP3T switch, for example. Three first ends of the second switch unit 126 are respectively connected to the output end of the first coupling unit 114, the output end of the second coupling unit, and the coupling input port CPLIN in a one-to-one correspondence manner, and a second end of the second switch unit 126 is respectively connected to the first coupling output port CPLOUT1 or the second coupling output port CPLOUT 2. The second switch unit 126 can selectively output the first coupling signal and the second coupling signal to the first coupling output port CPLOUT1 or the second coupling output port CPLOUT2 to implement power detection on the first low-frequency signal and the plurality of second low-frequency signals, and can also output the external coupling signal input through the coupling input port CPLIN to the first coupling output port CPLOUT1 or the second coupling output port CPLOUT2 to be transmitted to the radio frequency transceiver 20 to implement power detection on the external coupling signal.

In one embodiment, please refer to fig. 9 again, the second switch unit 126 may also be a DP3T switch, wherein three first ends of the second switch unit 126 are respectively connected to the output end of the first coupling unit 114, the output end of the second coupling unit 125, and the coupling input port CPLIN in a one-to-one correspondence, and two second ends of the second switch unit 126 are respectively connected to the first coupling output port CPLOUT1 and the second coupling output port CPLOUT2 in a one-to-one correspondence.

For convenience of illustration, a coupled signal feedback link of the first coupled signal and the second coupled signal is described based on the rf system as shown in fig. 9.

Feedback link of the first coupled signal:

when detecting the forward power, contact 1 of the DPDT switch in the first coupling unit 114 is tangent to contact 2, contact 3 is tangent to contact 4; when detecting the reverse power, the DPDT switch in the first coupling unit 114, contact 1 to contact 4, contact 3 to contact 2; contact 4 of the second switch unit 126 is tangential to contact 1, so as to conduct the power detection path of the first coupled signal for transmission to the rf transceiver 20.

Feedback link of the second coupled signal:

when the forward power is detected, a contact 1 of a DPDT switch in the second coupling unit is tangent to a contact 2, and a contact 3 is tangent to a contact 4; when the reverse power is detected, a DPDT switch in the second coupling unit, a contact 1 is tangent to a contact 4, and a contact 3 is tangent to a contact 2; contact 3 of the second switch unit 126 is tangent to contact 1, so that the power detection path of the second coupled signal is conducted and transmitted to the rf transceiver 20.

In the embodiment of the present application, by providing the second switch unit 126, a switch module, which is disposed outside the transceiver module 10 and used for switching the first coupling signal and the second coupling signal, may be omitted, so as to further improve the integration level of the transceiver module 10 and reduce the cost, and in addition, port matching between each device may also be implemented in the transceiver module 10, so as to reduce port mismatch and further improve the communication performance of the transceiver module 10.

With continued reference to fig. 9, in one embodiment, the transceiver module 10 is further configured with a diversity reception port LB DRX and a third antenna port ANT3, and the transceiver module 10 may further include a fourth switching unit 131 and a fifth switching unit 132. The fourth switching unit 131 and the fifth switching unit 132 may both be DPDT switches. Two first ends of the fourth switch unit 131 are respectively connected to the second end of the first switch unit and the diversity reception port LB DRX in a one-to-one correspondence, and two second ends of the fourth switch unit 131 are respectively connected to the third antenna port ANT3 and the diversity reception port LB DRX. In the embodiment of the present application, the fourth switching unit 131 is not further limited. By providing the fourth switching unit 131, the third antenna port ANT3 and the diversity reception port LB DRX, a reception path can be extended, for example, a signal is received through the low frequency antenna port, and the received signal is switched to the diversity reception port LB DRX through the fourth switching unit 131 to be output to other receiving modules.

In one embodiment, the transceiver module 10 is further configured with a 2G low frequency antenna port 2G LB OUT, a 2G high frequency output port 2G HB OUT, etc. for connection to an antenna. The transceiver module 10 may further include a third power amplifier 133, a fourth power amplifier 134, and the like. The third power amplifier 133 may be configured to support power amplification of the 2G low-frequency signal, and the fourth power amplifier 134 may support power amplification of the 2G high-frequency signal, so that the transceiver module 10 may also support transmission processing of the 2G signal, and a frequency band range of the radio-frequency signal that can be transmitted by the transceiver module 10 may be expanded.

As shown in fig. 10, in one embodiment, the receiving module 30 may be a radio frequency Low noise amplifier module (LFEM), which is referred to as LFEM device for short. The receiving module 30 is configured with an auxiliary input port LNAAUX LB1 connected to the third antenna Ant3, and a low frequency antenna port LB Ant connected to the fourth antenna Ant 4.

The receiving module 30 includes a second receiving amplifying unit 310 and a third receiving amplifying unit 320. The second receiving and amplifying unit 310 is respectively connected to the rf transceiver 20 and the auxiliary input port, and is configured to perform low-noise amplification on the first low-frequency signal received by the auxiliary input port and transmit the first low-frequency signal to the rf transceiver 20, so as to receive the first low-frequency signal. The third receiving and amplifying unit 320 is respectively connected to the radio frequency transceiver 20 and the low frequency antenna port LB ANT, and is configured to filter and amplify low noise of the first low frequency signal received by the low frequency antenna port LB ANT, and transmit the first low frequency signal to the radio frequency transceiver 20, so as to receive the first low frequency signal.

As shown in fig. 11, in particular, the second receiving and amplifying unit 310 may include a third low noise amplifier 311 and a third radio frequency switch 312, wherein the number of the auxiliary input ports may be multiple. The input end of the third low noise amplifier 311 is connected to the first end of the third rf switch 312, the second ends of the third rf switch 312 are respectively connected to the auxiliary input ports in a one-to-one correspondence, and the output end of the third low noise amplifier 311 is connected to the rf transceiver 20.

Optionally, the input terminal of the third low noise amplifier may also be directly connected to the auxiliary input port.

In one embodiment, the third receiving and amplifying unit 320 is further configured to filter, amplify and transmit the first low-frequency signal and the plurality of second low-frequency signals received by the low-frequency antenna port LB ANT to the radio frequency transceiver 20, so as to implement diversity MIMO reception of the first low-frequency signal and the plurality of second low-frequency signals. Specifically, the third receiving and amplifying unit 320 may include a fourth low noise amplifier 321, a fourth rf switch 322, a fifth rf switch 324, and a plurality of filters 323. The input terminal of the fourth low noise amplifier 321 is connected to a first terminal of the fourth rf switch 322, and the output terminal of the fourth low noise amplifier 321 is connected to the rf transceiver 20. First ends of the filters 323 are respectively connected to second ends of the fourth rf switch 322 in a one-to-one correspondence, and second ends of the filters 323 are respectively connected to first ends of the fifth rf switch 324 in a one-to-one correspondence. Each filter 323 can perform filtering processing on the received signal, and output each filtered signal to the fourth rf switch 322, where the frequency bands of the first and second filtered signals are different.

With continued reference to fig. 11, in one embodiment, the receiving module 30 further includes a fourth receiving and amplifying unit 330 for supporting filtering and low-noise amplifying processing on the middle and high frequency signals. The medium-high frequency signals may include radio frequency signals of a plurality of medium frequency bands and radio frequency signals of a plurality of high frequency bands, where the radio frequency signals may be 4G signals or 5G signals.

As shown in fig. 12, in one embodiment, the rf system further includes a filtering module 50 connected to the auxiliary input port LNAAUX LB and the third antenna Ant3, respectively. The filtering module 50 is configured to perform filtering processing on the first low-frequency signal received by the third antenna Ant 3. For example, the filtering module 50 may include a filter that filters out the stray waves other than the first low frequency signal to output only the first low frequency signal.

By providing the filtering module 50, the low-frequency signal received by the second receiving and amplifying unit 310 is a filtered signal, and the second receiving and amplifying unit 310 may perform low-noise amplification processing on the filtered low-frequency signal.

Optionally, the filtering module 50 may also be integrated in the receiving module 30, and for example, the first end and the second end of the filtering module 50 may be respectively connected to the input end of the third low noise amplifier and the auxiliary input port LNA AUX LB in a one-to-one correspondence manner. In the embodiment of the present application, the arrangement position of the filtering module 50 is not further limited.

Based on the rf system shown in fig. 12, the transceiving path of the dual low frequency signal is described by using the first low frequency signal as the low frequency signal in the B28A (or N28A) band.

The first transmission link:

the first low frequency signal is output from the rf transceiver 20, transmitted to the first input port LB RFIN1 of the transceiver module 10 through the rf trace, power-amplified by the first power amplifier 111, transmitted to the first duplexer 113, filtered by the first duplexer 113, and output to the first antenna port ANT1, so as to be transmitted to the first antenna ANT 1.

The second transmission chain:

the first low frequency signal is output from the radio frequency transceiver 20, transmitted to the second input port LB RFIN2 of the transceiver module 10 through the radio frequency trace, power-amplified by the second power amplifier 1211, transmitted to the first radio frequency switch 1212, filtered by the second duplexer 1221, output to the first switch unit 124, transmitted to the second antenna port ANT2 through the first switch unit 124 and the fourth switch unit 131, and transmitted to the second antenna ANT 2.

First receive (primary set receive) chain:

the second antenna Ant2 receives the first rf signal, and transmits the first rf signal to the second duplexer 1221 through the second antenna port Ant2, the fourth switch unit 131, and the first switch unit 124, and outputs the first rf signal to the second low noise amplifier 1231 through the second switch 1232 after being filtered by the second duplexer 1221, and outputs the second rf signal to the rf transceiver 20 through the fifth switch unit 132 and the second output port LNAOUT 2.

Second receive (diversity receive) chain:

the first antenna Ant1 receives a first rf signal, and transmits the first rf signal to the first duplexer 113 through the first antenna port Ant1, and outputs the first rf signal to the first low noise amplifier 112 after being filtered by the first duplexer 113, and outputs the first rf signal to the rf transceiver 20 through the fifth switch unit 132 and the first output port LNA OUT 1.

Third receive (PRX MIMO) link:

the third antenna Ant3 receives the first rf signal, which is transmitted to the filter 323 through the low frequency antenna port LB Ant and the fifth rf switch 324, filtered by the filter 323, switched to the fourth lna 321 through the fourth rf switch 322, and output to the rf transceiver 20 through the DPDT switch.

Fourth receive (DRX MIMO) link:

the fourth antenna Ant4 receives the first rf signal, and transmits the first rf signal to the auxiliary input port LNA AUX LB1 after being filtered by the filtering module 50, and outputs the first rf signal to the third rf switch 312 through the auxiliary input port LNA AUX LB1, and switches the first rf signal to the third LNA 311 through the third rf switch 312, and outputs the first rf signal to the rf transceiver 20 through the DPDT switch.

Compared with the radio frequency system which can only support the receiving of the 2 x 2MIMO and the single-path transmitting of the low-frequency signals in the related technology, the downlink communication speed can be doubled, the uplink coverage distance can be doubled, and the channel capacity and the receiving and transmitting performance of the radio frequency system can be doubled. In addition, in the embodiment of the present application, two transceiver circuits are disposed in the transceiver module, so that the configuration requirement for two-way transmission of the first low-frequency signal by using a plurality of discrete MMPA devices can be avoided, the integration level of the transceiver module 10 can be further improved to improve the integration level of the radio frequency system, and the cost can be reduced.

The embodiment of the application also provides communication equipment, and the communication equipment is provided with the radio frequency system in any embodiment. By arranging the radio frequency system on the communication equipment, the uplink 2 x 2MIMO function and the downlink 2 x 2MIMO receiving function of the first low-frequency signal can be realized, the uplink speed can be doubled, the uplink coverage distance can be doubled, and the channel capacity and the receiving and transmitting performance of the radio frequency system can be doubled. In addition, in the embodiment of the present application, two transceiver circuits are disposed in the transceiver module 10, so that it is possible to avoid the need of using multiple discrete MMPA devices to implement the configuration requirement for the two-way transmission of the first low-frequency signal, and further improve the integration level of the transceiver module 10 to improve the integration level of the radio frequency system, and at the same time, reduce the cost.

As shown in fig. 13, further taking the communication device as a mobile phone 11 for illustration, specifically, as shown in fig. 13, the mobile phone 11 may include a memory 21 (which optionally includes one or more computer-readable storage media), a processing circuit 22, a peripheral interface 23, a radio frequency system 24, and an input/output (I/O) subsystem 26. These components optionally communicate over one or more communication buses or signal lines 29. It will be understood by those skilled in the art that the handset 11 shown in figure 13 is not intended to be limiting and may include more or fewer components than shown, or some of the components may be combined, or a different arrangement of components. The various components shown in fig. 13 are implemented in hardware, software, or a combination of both hardware and software, including one or more signal processing and/or application specific integrated circuits.

The memory 21 optionally includes high-speed random access memory, and also optionally includes non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state memory devices. Illustratively, the software components stored in memory 21 include an operating system 211, a communications module (or set of instructions) 212, a Global Positioning System (GPS) module (or set of instructions) 213, and the like.

Processing circuitry 22 and other control circuitry, such as control circuitry in radio frequency system 24, may be used to control the operation of handset 11. The processing circuit 22 may include one or more microprocessors, microcontrollers, digital signal processors, baseband processors, power management units, audio codec chips, application specific integrated circuits, and the like.

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

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

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

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

Claims

1. A radio frequency system, comprising:

a transceiver module configured with a first antenna port connected to a first antenna, a second antenna port connected to a second antenna, a first input port, a second input port, a first output port, and a second output port connected to the radio frequency transceiver, wherein the transceiver module comprises:

2. The radio frequency system according to claim 1, wherein the first transceiver circuit comprises:

the input end of the first power amplifier is connected with the first input port and is used for performing power amplification processing on the first low-frequency signal received by the first input port;

a first end of the first duplexer is connected with the output end of the first power amplifier, and a second end of the first duplexer is connected with the first antenna port, and is configured to perform filtering processing on a signal output by the first power amplifier and output the filtered first low-frequency signal to the first antenna port;

and the input end of the first low-noise amplifier is connected with the other first end of the first duplexer, and the output end of the first low-noise amplifier is connected with the first output port and used for performing low-noise amplification processing on the first low-frequency signal output by the first duplexer.

3. The radio frequency system of claim 2, further comprising:

the first coupling unit is arranged on a radio frequency path between the second end of the first duplexer and the first antenna, and is used for coupling the first low-frequency signal after power amplification and filtering processing, and outputting a first coupling signal through an output end of the first coupling unit, wherein the first coupling signal is used for detecting power information of the first low-frequency signal.

4. The RF system according to claim 3, wherein the transceiver module is further configured with a first coupling output port, the first coupling unit is disposed on the RF path between the second end of the first duplexer and the first antenna port, and the first coupling signal output from the output end of the first coupling unit is transmitted to the RF transceiver through the first coupling output port.

5. The radio frequency system of claim 3, wherein the second transceiver circuit is further configured to support transmit and receive processing of a plurality of second low frequency signals, and wherein the second transceiver circuit comprises:

the input end of the transmitting and amplifying unit is connected with the second input port and is used for performing power amplification processing on the first low-frequency signal and the second low-frequency signals received by the second input port;

the filtering unit is connected with the output end of the transmitting amplification unit and used for filtering the signals output by the transmitting amplification unit and outputting the first low-frequency signals and the plurality of second low-frequency signals after filtering to the second antenna port;

the input end of the first receiving amplification unit is connected with the filtering unit, and the output end of the first receiving amplification unit is connected with the first output port, and is used for performing low-noise amplification processing on the plurality of second low-frequency signals output by the filtering unit and selecting the first low-frequency signals or any one of the second low-frequency signals to output;

and a plurality of first ends of the first switch unit are correspondingly connected with the filtering unit, and a second end of the first switch unit is connected with the second antenna port.

6. The radio frequency system of claim 5, wherein the transceiver module is further configured with a second coupled output port, wherein the transceiver module further comprises:

the second coupling unit is arranged on a radio frequency path between the second end of the first switch unit and the second antenna, and is used for coupling the first low-frequency signal and the second low-frequency signal after power amplification and filtering processing, and outputting a second coupling signal to the radio frequency transceiver through the second coupling output port so as to detect power information of the first low-frequency signal and the second low-frequency signal.

7. The radio frequency system according to claim 6, wherein the transceiver module is further configured with a coupling input port for receiving an externally coupled signal, the radio frequency system further comprising:

two first ends of the second switch unit are respectively connected with the output end of the second coupling unit and the coupling input port in a one-to-one correspondence manner, and a second end of the second switch unit is connected with the second coupling output port;

and two first ends of the switch module are respectively connected with the output end of the first coupling unit and the second coupling output port in a one-to-one correspondence manner, and a second end of the switch module is connected with the radio frequency transceiver and used for selectively outputting the first coupling signal or the second coupling signal to the radio frequency transceiver.

8. The radio frequency system of claim 6, wherein the transceiver module is further configured with a coupling input port for receiving an externally coupled signal, wherein the transceiver module further comprises:

and three first ends of the second switch unit are respectively connected with the output end of the first coupling unit, the output end of the second coupling unit and the coupling input port in a one-to-one correspondence manner, and a second end of the second switch unit is connected with the first coupling output port or the second coupling output port.

9. The radio frequency system according to any one of claims 1 to 8, further comprising:

a receiving module configured with an auxiliary input port connected to a third antenna and a low frequency antenna port connected to a fourth antenna, wherein the receiving module comprises:

the second receiving and amplifying unit is respectively connected with the radio frequency transceiver and the auxiliary input port, and is used for performing low-noise amplification processing on the first low-frequency signal received by the auxiliary input port and transmitting the first low-frequency signal to the radio frequency transceiver so as to receive the first low-frequency signal;

and the third receiving and amplifying unit is respectively connected with the radio frequency transceiver and the low-frequency antenna port and is used for filtering and low-noise amplifying the first low-frequency signal received by the low-frequency antenna port and transmitting the first low-frequency signal to the radio frequency transceiver so as to receive the first low-frequency signal.

10. The rf system according to claim 9, wherein the third receiving and amplifying unit is further configured to filter, amplify with low noise, and transmit the first low frequency signal and the plurality of second low frequency signals received by the low frequency antenna port to the rf transceiver, so as to receive the first low frequency signal and the plurality of second low frequency signals.

11. The radio frequency system of claim 9, further comprising:

and the filtering module is respectively connected with the auxiliary input port and the third antenna and is used for filtering the first low-frequency signal received by the third antenna.

12. A communication device, comprising: the radio frequency system of any one of claims 1-11.