CN216490479U

CN216490479U - Radio frequency system and communication device

Info

Publication number: CN216490479U
Application number: CN202122992720.9U
Authority: CN
Inventors: 陈锋; 仝林
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: 2022-05-10
Anticipated expiration: 2031-11-30

Abstract

The present application relates to a radio frequency system and a communication device. The radio frequency system includes: a radio frequency transceiver; the first transceiving circuit is respectively connected with the radio frequency transceiver and the first antenna and is used for supporting the transmission and receiving processing of the first low-frequency signal and supporting the receiving processing of the second low-frequency signal; the second transceiving circuit is respectively connected with the radio frequency transceiver and the second antenna and is used for supporting the receiving processing of the first low-frequency signal and supporting the transmitting and receiving processing of the second low-frequency signal; the first receiving circuit is respectively connected with the radio frequency transceiver and the third antenna and is used for supporting receiving processing of the first low-frequency signal; and the second receiving circuit is respectively connected with the radio frequency transceiver and the fourth antenna, and is used for supporting the receiving processing of the first low-frequency signal, supporting the downlink 4 x 4MIMO function of the first low-frequency signal and the downlink 2 x 2MIMO function of the second low-frequency signal, and improving the channel capacity of the radio frequency system and the receiving performance of the low-frequency signal in multiples.

Description

Radio frequency system and communication device

Technical Field

The present application relates to the field of antenna 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 reception performance for low frequency signals (e.g., signals in N28 or B20 frequency band) 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 support a downlink 4 x 4MIMO function of a first low-frequency signal and a downlink 2 x 2MIMO function of a second low-frequency signal, and can improve the channel capacity of the radio frequency system and the receiving performance of the low-frequency signal in multiples.

An embodiment of the present application provides a radio frequency system, including:

a radio frequency transceiver;

the first transceiving circuit is respectively connected with the radio frequency transceiver and the first antenna and is used for supporting the transmission and receiving processing of a first low-frequency signal and supporting the receiving processing of a second low-frequency signal;

the second transceiving circuit is respectively connected with the radio frequency transceiver and the second antenna and is used for supporting the receiving processing of the first low-frequency signal and supporting the transmitting and receiving processing of the second low-frequency signal;

the first receiving circuit is respectively connected with the radio frequency transceiver and the third antenna and is used for supporting receiving processing of the first low-frequency signal;

the second receiving circuit is respectively connected with the radio frequency transceiver and the fourth antenna and is used for supporting receiving processing of the first low-frequency signal; wherein the frequency ranges of the first and second low frequency signals are different.

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

The radio frequency system comprises a radio frequency transceiver, a first transceiver circuit, a second transceiver circuit, a first receiving circuit and a second receiving circuit. The first transceiver circuit, the second transceiver circuit, the first receiving circuit and the second receiving circuit can cooperate with the first antenna, the second antenna, the third antenna and the fourth antenna to support transmission and four-way reception of the first low-frequency signal, and can support a downlink 4 x 4MIMO function of the first low-frequency signal; in addition, the first transceiver circuit and the second transceiver circuit can cooperate with the first antenna and the second antenna to support transmission and dual-path reception of the second low-frequency signal, so as to support a 2 x 2MIMO function on the second low-frequency signal. Compared with a radio frequency system which can only support the 2 x 2MIMO reception of the first low-frequency signal in the related art, the diversity reception gain can be doubled, the downlink coverage distance is doubled, and the channel capacity of the radio frequency system and the reception performance of the low-frequency signal can be further doubled.

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 diagram illustrating an exemplary RF system;

FIG. 2 is a second schematic diagram of an embodiment of an RF system;

FIG. 3 is a third exemplary diagram of an RF system;

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

fig. 5 is a schematic diagram of the distribution of four antennas in a communication device according to an embodiment;

FIG. 6 is a fifth schematic diagram of an embodiment of an RF system;

FIG. 7 is a sixth schematic diagram illustrating the structure of a receiver circuit according to an embodiment;

FIG. 8 is a seventh schematic diagram illustrating an exemplary RF system;

FIG. 9 is an eighth schematic block diagram of an exemplary RF system;

fig. 10 is a schematic structural diagram of a communication device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first client may be referred to as a second client, and similarly, a second client may be referred to as a first client, without departing from the scope of the present application. Both the first client and the second client are clients, but they are not the same client.

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, a radio frequency system provided in the embodiment of the present application includes: the antenna comprises a radio frequency transceiver 10, a first transceiver circuit 20, a second transceiver circuit 30, a first receiving circuit 40, a second receiving circuit 50, a first antenna Ant0, a second antenna Ant1, a third antenna Ant2 and a fourth antenna Ant 3.

In this embodiment, the first antenna Ant0, the second antenna Ant1, the third antenna Ant2, and the fourth antenna Ant3 are all capable of supporting the transceiving of low-frequency rf signals of multiple 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 Ant0, the second antenna Ant1, the third antenna Ant2, and the fourth antenna Ant3 are not further limited.

The first transceiver circuit 20 is connected to the rf transceiver 10 and the first antenna Ant0, respectively, and is configured to support a transmission and reception process for a first low frequency signal and support a reception process for a second low frequency signal. And the second transceiver circuit 30 is respectively connected to the radio frequency transceiver 10 and the second antenna Ant1, and is configured to support a receiving process of the first low frequency signal and support a transmitting and receiving process of the second low frequency signal. The first transceiver circuit 20 and the second transceiver circuit 30 may support transmission and dual reception of the first low frequency signal in cooperation with the first antenna Ant0 and the second antenna Ant1 to support a downlink 2 × 2MIMO function for the first low frequency signal, and may also support transmission and dual reception of the second low frequency signal to support a downlink 2 × 2MIMO function for the second low frequency signal.

The first receiving circuit 40 is connected to the radio frequency transceiver 10 and the third antenna Ant2, respectively, and is configured to support a receiving process of the first low frequency signal. The second receiving circuit 50 is connected to the rf transceiver 10 and the fourth antenna Ant3, respectively, and is configured to support a receiving process of the first low frequency signal. Wherein the frequency ranges of the first and second low frequency signals are different. The first receiving circuit 40 and the second receiving circuit 50 may support dual reception of the first low frequency signal in cooperation with the third antenna Ant2 and the fourth antenna Ant3 to support a downlink 2 x 2MIMO function for the first low frequency signal.

The first and second low frequency signals may be at least one of a 4G LTE low frequency signal and a 5G NR low frequency signal, respectively. The frequency band division of the first low frequency signal and the second low frequency signal is shown in table 1.

TABLE 1 frequency band division table for first and second low frequency signals

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.

In the embodiment of the present application, the radio frequency system includes a radio frequency transceiver 10, a first transceiver circuit 20, a second transceiver circuit 30, a first receiving circuit 40, and a second receiving circuit 50. The first transceiver circuit 20, the second transceiver circuit 30, the first receiver circuit 40, and the second receiver circuit 50 may support transmission and four-way reception of the first low-frequency signal in cooperation with the first antenna Ant0, the second antenna Ant1, the third antenna Ant2, and the fourth antenna Ant3, and may support a downlink 4 × 4MIMO function on the first low-frequency signal; in addition, the first transceiver circuit 20 and the second transceiver circuit 30 may also support transmission and two-way reception of the second low-frequency signal in cooperation with the first antenna Ant0 and the second antenna Ant 1. Compared with a radio frequency system which can only support the receiving of the first low-frequency signal 2 x 2MIMO in the related technology, the diversity receiving gain can be doubled, the downlink coverage distance is doubled, and the channel capacity of the radio frequency system and the receiving performance of the first low-frequency signal can be doubled; in addition, the radio frequency system in the embodiment of the present application may further support a 2 × 2MIMO function on the second low frequency signal. Therefore, the radio frequency system provided by the embodiment of the application can improve the receiving performance of the low-frequency signal.

In one embodiment, the first low-frequency signal and the second low-frequency signal are both low-band 4G signals. Wherein, the first low-frequency signal and the second low-frequency signal can meet the configuration requirement of the double low-frequency NRCA combination. For example, LTE CA combining of the first and second low frequency signals includes, but is not limited to: b8+ B20, B8+ B28, B20+ B28, B28+ B5, and the like. In this embodiment, when the first low-frequency signal and the second low-frequency signal are both low-frequency-band 4G signals, the radio frequency system thereof may support a carrier aggregation function for two different low-frequency-band 4G LTE signals.

In one embodiment, the first low-frequency signal and the second low-frequency signal are both low-frequency band 5G signals. Wherein, the first low frequency signal and the second low frequency signal can meet the configuration requirement of the combination of the double low frequency NR Carrier Aggregation (CA). For example, the NR CA combination of the first low frequency signal and the second low frequency signal includes, but is not limited to: n8+ N20, N8+ N28, N20+ N28, N28+ N5, and the like. In this embodiment, when the first low frequency signal and the second low frequency signal are both 5G signals of a low frequency band, the radio frequency system thereof may support a carrier aggregation function for the 5G NR signals of two different low frequency bands.

In one embodiment, one of the first low-frequency signal and the second low-frequency signal is a low-band 4G signal, and the other is a low-band 5G signal. The first low frequency signal and the second low frequency signal may satisfy configuration requirements of Dual Connectivity (E-UTRA and New radio Dual Connectivity, endec) of the Dual low frequency 4G radio access network with the 5G NR, for example, a combination of the first low frequency signal and the second low frequency signal includes, but is not limited to: b8+ N20, B8+ N28, B28+ N5, B28+ N20, B20+ N8, B2+ N8, B5+ N28 and the like. The radio frequency system provided by the embodiment can support the combination of the ENDC with the double low frequencies, and the radio frequency system can work in the NSA mode.

It should be noted that, in the embodiment of the present application, specific frequency bands of the first low-frequency signal and the second low-frequency signal are not limited to the above example, and may also be low-frequency signals of other frequency bands.

As shown in fig. 2, in one embodiment, the first transceiver circuit 20 includes: a first transmit amplifying unit 210, a first receive amplifying unit 220, and a first filtering unit 230. The input end of the first transmission amplifying unit 210 is connected to the radio frequency transceiver 10, and is configured to perform power amplification processing on the first low-frequency signal output by the radio frequency transceiver 10, so as to implement transmission processing on the first low-frequency signal. Specifically, the first transmit amplifying unit 210 includes a first power amplifier 211. The output end of the first power amplifier 211 serves as the output end of the first transmit amplifying unit 210, and the input end of the first power amplifier 211 serves as the input end of the first transmit amplifying unit 210, which can achieve power amplification processing of the first low-frequency signal. In this embodiment of the application, the first transmit amplifying unit 210 may be a multi-mode multi-band Power Amplifier (MMPA), which is abbreviated as an MMPA device.

The output end of the first receiving and amplifying unit 220 is connected to the radio frequency transceiver 10, and is configured to perform low-noise amplification processing on the received first low-frequency signal and the second low-frequency signal, so as to implement receiving processing on the first low-frequency signal and the second low-frequency signal. The first receiving and amplifying unit 220 may include a first low noise amplifier 221, wherein an input terminal of the first low noise amplifier 221 is used as an input terminal of the first receiving and amplifying unit 220, and an output terminal of the first low noise amplifier 221 is used as an output terminal of the first receiving and amplifying unit 220. The first low-noise amplifier 221 may perform low-noise amplification processing on the first low-frequency signal and the second low-frequency signal. In the embodiment of the present application, the first receiving and amplifying unit 220 may be an External Low Noise Amplifier (ela), which is referred to as an ela device for short.

The first filtering unit 230 is respectively connected to the output terminal of the first transmitting amplifying unit 210, the input terminal of the first receiving amplifying unit 220, and the first antenna Ant0, and is configured to filter the signal output by the first transmitting amplifying unit 210 to be output to the first antenna Ant0, and filter the signal received by the first antenna Ant0 to be output to the first receiving amplifying unit 220. The first filtering unit 230 may include a first triplexer 231. One of three first terminals of the first triplexer 231 is connected to the output terminal of the first power amplifier 211, the other two first terminals of the first triplexer 231 are respectively connected to the input terminal of the first low noise amplifier 221, and a second terminal (i.e., a common terminal) of the first triplexer 231 is connected to the first antenna Ant 0. The first triplexer 231 may filter the received signal to filter out the stray waves, and output only the first low-frequency signal and the second low-frequency signal. For example, if the frequency ranges of the first low frequency signal and the second low frequency signal are relatively close, the first filtering unit 230 may be a duplexer. In the embodiment of the present application, specific components of the first filtering unit 230 are not further limited.

Specifically, the first low-frequency signal output by the radio frequency transceiver 10 is power-amplified by the first transmit amplifying unit 210 and then output to the first triplexer 231, and is filtered by the first triplexer 231 and then output to the first antenna Ant0, so as to implement the transmit processing of the first low-frequency signal. In addition, the first antenna Ant0 may receive the first low frequency signal and the second low frequency signal, and output the first low frequency signal and the second low frequency signal to the first triplexer 231 for filtering processing, so as to output the first low frequency signal and the second low frequency signal without stray waves to the first receiving and amplifying unit 220, and output the first low frequency signal and the second low frequency signal to the radio frequency transceiver 10 after the first receiving and amplifying unit 220 performs low noise amplification processing on the first low frequency signal and the second low frequency signal, so as to implement receiving processing on the first low frequency signal and the second low frequency signal.

With continued reference to fig. 2, in one embodiment, the second transceiver circuit 30 includes a second transmitting amplifying unit 310, a second receiving amplifying unit 320 and a second filtering unit 330. The input end of the second transmitting and amplifying unit 310 is connected to the radio frequency transceiver 10, and is configured to perform power amplification processing on the second low-frequency signal output by the radio frequency transceiver 10, so as to implement transmitting processing on the second low-frequency signal. Specifically, the second transmit amplifying unit 310 includes a second power amplifier 311. The output end of the second power amplifier 311 serves as the output end of the second transmission amplifying unit 310, and the input end of the second power amplifier 311 serves as the input end of the second transmission amplifying unit 310, which can implement the power amplification processing on the second low-frequency signal. In the embodiment of the present application, the second transmitting and amplifying unit 310 may be an MMPA device.

The output end of the second receiving and amplifying unit 320 is connected to the radio frequency transceiver 10, and is configured to perform low noise amplification processing on the received first low frequency signal and the second low frequency signal, so as to implement receiving processing on the first low frequency signal and the second low frequency signal. Specifically, the second receiving and amplifying unit 320 may include a second low noise amplifier 321. Wherein, the input terminal of the second low noise amplifier 321 is used as the input terminal of the second receiving and amplifying unit 320, and the output terminal of the second low noise amplifier 321 is used as the output terminal of the first receiving and amplifying unit 220. The second low-noise amplifier 321 can perform low-noise amplification processing on the first low-frequency signal and the second low-frequency signal. In the embodiment of the present application, the second receiving amplifying unit 320 may be an ela device.

The second filtering unit 330 is respectively connected to the output end of the second transmitting amplifying unit 310, the input end of the second receiving amplifying unit 320, and the second antenna Ant1, and is configured to filter the signal output by the second transmitting amplifying unit 310 to be output to the first antenna Ant0, and filter the signal received by the second antenna Ant1 to output the first low-frequency signal and the second low-frequency signal to the second receiving amplifying unit 320. The second filtering unit 330 may include a second triplexer 331, wherein one of three first terminals of the second triplexer 331 is connected to the output terminal of the second power amplifier 311, the other two of the three first terminals of the second triplexer 331 are respectively connected to the input terminals of the second low noise amplifier 321, and a second terminal (i.e., a common terminal) of the second triplexer 331 is connected to the second antenna Ant 1. The second triplexer 331 may filter the received signal to filter out the stray waves, and output only the first low frequency signal and the second low frequency signal. For example, if the frequency ranges of the first low frequency signal and the second low frequency signal are relatively close, the second filtering unit 330 may be a duplexer. In the embodiment of the present application, specific components of the second filtering unit 330 are not further limited.

Specifically, the second low-frequency signal output by the radio frequency transceiver 10 is power-amplified by the second transmitting and amplifying unit 310, and then output to the second triplexer 331, and is filtered by the second triplexer 331, and then output to the second antenna Ant1, so as to implement transmitting of the second low-frequency signal. In addition, the second antenna Ant1 may receive the first low frequency signal and the second low frequency signal, and output the first low frequency signal and the second low frequency signal to the second triplexer 331 for filtering processing, so as to output the first low frequency signal and the second low frequency signal without stray waves to the second receiving and amplifying unit 320, and output the first low frequency signal and the second low frequency signal to the radio frequency transceiver 10 after the second receiving and amplifying unit 320 performs low noise amplification processing on the first low frequency signal and the second low frequency signal, so as to implement receiving processing on the first low frequency signal and the second low frequency signal.

In one embodiment, at least two of the first Power amplifier 211, the first Low noise amplifier 221, the first triplexer 231 in the first transceiver circuit 20 and the second Power amplifier 311, the second Low noise amplifier 321, and the second triplexer 331 in the second transceiver circuit 30 may be integrated into a radio frequency Module, such as a Low Band Power amplifier Module (Low Band amplifier Module integrated multiplexer With LNA, L-PA MID), or L-PA MID device for short. For example, if the first power amplifier 211, the first low noise amplifier 221, the second power amplifier 311, the second low noise amplifier 321, the first triplexer 231, and the second triplexer 331 are integrated in the L-PA MID device, the integration level of the radio frequency system can be improved, the occupied area can be reduced, the cost can be reduced by only one-time packaging, and in addition, the port matching among the devices can be realized in the L-PA MID device, the port mismatch can be reduced, and the communication performance of the radio frequency system can be further improved.

Optionally, the first power amplifier 211, the first low noise amplifier 221, the second power amplifier 311, the second low noise amplifier 321, the first triplexer 231, and the second triplexer 331 may also be discrete devices. In the embodiment of the present application, the integration manner of each device in the first transceiver circuit 20 and the second transceiver circuit 30 is not further limited.

As shown in fig. 3, in one embodiment, the first receiving circuit 40 includes a third filtering unit 410 and a third receiving and amplifying unit 420. One end of the third filtering unit 410 is connected to the third antenna Ant2, and the other end of the third filtering unit 410 is connected to the input end of the third receiving and amplifying unit 420, and is configured to filter the signal received by the third antenna Ant2 and output the first low-frequency signal to the third receiving and amplifying unit 420. The output end of the third receiving and amplifying unit 420 is connected to the radio frequency transceiver 10, and is configured to receive the filtered first low-frequency signal and perform low-noise amplification on the received first low-frequency signal. The third receiving and amplifying unit 420 may include a third low noise amplifier 421, wherein an input end of the third low noise amplifier 421 is connected to the other end of the third filtering unit 410, and an output end of the third low noise amplifier 421 is connected to the radio frequency transceiver 10, so as to implement receiving processing of the first low frequency signal.

With continued reference to fig. 3, in one embodiment, the second receiving circuit 50 includes a fourth filtering unit 510 and a fourth receiving amplifying unit 520. One end of the fourth filtering unit 510 is connected to the fourth antenna Ant3, and the other end of the fourth filtering unit 510 is connected to the input end of the fourth receiving and amplifying unit 520, and is configured to filter the signal received by the fourth antenna Ant3 and output the first low-frequency signal to the fourth receiving and amplifying unit 520. The output end of the fourth receiving and amplifying unit 520 is connected to the radio frequency transceiver 10, and is configured to receive the filtered first low-frequency signal and perform low-noise amplification on the received first low-frequency signal. The fourth receiving and amplifying unit 520 may include a fourth low noise amplifier 521, wherein an input end of the fourth low noise amplifier 521 is connected to the other end of the fourth filtering unit 510, and an output end of the fourth low noise amplifier 521 is connected to the radio frequency transceiver 10, so as to implement receiving processing of the first low frequency signal.

As shown in fig. 4, in one embodiment, the first receiving circuit 40 and the second receiving circuit 50 are also used to support the receiving process of the second low frequency signal. Specifically, the third filtering unit 410 and the fourth filtering unit 510 may respectively perform filtering processing on signals received by the antenna to output a first low-frequency signal and a second low-frequency signal without stray waves. The third receiving and amplifying unit 420 and the fourth receiving and amplifying unit 520 may also support low noise amplification processing of the first low frequency signal and the second low frequency signal, respectively.

In the present embodiment, the first transceiver circuit 20 and the second transceiver circuit 30 may support transmission and dual-path reception of the first low-frequency signal and support transmission and dual-path reception of the second low-frequency signal in cooperation with the first antenna Ant0 and the second antenna Ant 1; in addition, the first receiving circuit 40 and the second receiving circuit 50 can support dual-path reception of the first low-frequency signal in cooperation with the third antenna Ant2 and the fourth antenna Ant3, and supports two-way reception of the second low frequency signal, therefore, the radio frequency system provided by the present embodiment, can support the transmitting process and the four-way receiving process (4 x 4MIMO receiving function) of the first low-frequency signal, can also support the transmitting process and the four-way receiving process (4 x 4MIMO receiving function) of the second low-frequency signal, can improve the diversity receiving gain by one time compared with the radio frequency system which can only support the 2 x 2MIMO receiving of the second low-frequency signal in the prior art, the downlink coverage distance is doubled, so that the channel capacity of the radio frequency system and the receiving performance of the second low-frequency signal can be doubled, and the receiving performance of the low-frequency signal can be improved.

In one embodiment, each unit included in the first receiving circuit 40 and the second receiving circuit 50 may be integrated in the same receiving device, and the receiving device may be a Low noise amplifier module (LFEM), which is abbreviated as LFEM device and may be configured to support receiving processing of Low-frequency signals (e.g., 4G LTE signals including at least one Low-frequency band and 5G NR signals including at least one Low-frequency band). In this embodiment, the first receiving circuit 40 and the second receiving circuit 50 may be the LFEM devices, and by providing the LFEM devices, the integration level of the radio frequency system may be improved, the occupied space of the radio frequency system may be reduced, and the miniaturization design of the radio frequency system may be facilitated.

Based on the rf system shown in fig. 4, the first low frequency signal is an N28 signal, and the second low frequency signal is a B20 signal, for example, the transmission and four-way reception of the first low frequency signal and the second low frequency signal are described.

A first transmission path: the rf transceiver 10 outputs an N28 signal to the first power amplifier 211, amplifies the signal by the first power amplifier 211, filters an out-of-band signal by the first triplexer 231, and outputs the filtered out-of-band signal to the first antenna Ant0 through a common terminal of the first triplexer 231.

A second transmission path: the rf transceiver 10 outputs a B20 signal to the second power amplifier 311, and the signal is amplified by the second power amplifier 311, filtered by the second triplexer 331, and then outputted to the second antenna Ant1 through the common port of the second triplexer 331.

A first reception path: the B20 signal and the N28 signal in the space received by the first antenna Ant0, and the B20 signal and the N28 signal enter the first triplexer 231, the first triplexer 231 filters the out-of-band signal, and then the out-of-band signal is output to the first low noise amplifier 221 through the common terminal of the first triplexer 231, the B20 signal and the N28 signal are subjected to low noise amplification, and finally the out-of-band signal is output to the radio frequency transceiver 10, so as to implement the first Path Reception (PRX) of the B20 signal and the second path signal reception (DRX) of the N28 signal.

A second reception path: the B20 signal and the N28 signal in the space received by the second antenna Ant1, and the B20 signal and the N28 signal enter the second triplexer 331, are filtered by the second triplexer 331, and then are output to the second low noise amplifier 321 through the common terminal of the second triplexer 331, and are subjected to low noise amplification processing on the B20 signal and the N28 signal, and finally are output to the radio frequency transceiver 10, so as to implement first Path Reception (PRX) of the N28 signal and second path signal reception (DRX) of the B20 signal.

A third reception path: the B20 signal and the N28 signal in the space received by the third antenna Ant2, and the B20 signal and the N28 signal enter the third filtering unit 410, are filtered by the third filtering unit 410 to the out-of-band signal, and then are output to the third low noise amplifier 421, and are subjected to low noise amplification processing on the B20 signal and the N28 signal, and finally are output to the radio frequency transceiver 10, so as to implement third path reception (PRX MIMO) on the B20 signal and the N28 signal.

A fourth reception path: the B20 signal and the N28 signal in the space received by the fourth antenna Ant3, and the B20 signal and the N28 signal enter the fourth filtering unit 510, the fourth filtering unit 510 filters the out-of-band signal, and then outputs the out-of-band signal to the fourth low noise amplifier 521, performs low noise amplification on the B20 signal and the N28 signal, and finally outputs the out-of-band signal to the radio frequency transceiver 10, so as to implement fourth-path reception (DRX MIMO) on the B20 signal and the N28 signal.

In one embodiment, the antenna efficiency of the first antenna Ant0 and the second antenna Ant1 is higher than that of the third antenna Ant2 and the fourth antenna Ant 3. Generally, when the radio frequency system is applied in a communication device, due to the limitation of the structure of the communication device, as shown in fig. 5, the first antenna Ant0 and the second antenna Ant1 are usually disposed on the top frame 101 and the bottom frame 103 of the communication device, respectively, and the third antenna Ant2 and the fourth antenna Ant3 are disposed on the two

side frames

102, 104 of the communication device, so that the efficiency of the first antenna Ant0 and the efficiency of the second antenna Ant1 are higher than the efficiency of the third antenna Ant2 and the efficiency of the fourth antenna Ant 3.

As shown in fig. 6 and 7, in one embodiment, the radio frequency system further includes a first amplifying circuit 60 disposed on a radio frequency path between the third filtering unit 410 and the radio frequency transceiver 10, and configured to perform low noise amplification processing on the received first low frequency signal and the second low frequency signal. The first amplifying circuit 60 may be disposed on a radio frequency path between the third receiving and amplifying unit 420 and the radio frequency transceiver 10, or disposed on a radio frequency path between the third filtering unit 410 and the third receiving and amplifying unit 420. The first amplifying circuit 60 may include a fifth low noise amplifier 610. Specifically, the input end of the fifth low noise amplifier 610 is connected to the output end of the third low noise amplifier 421, and the output end of the fifth low noise amplifier 610 is connected to the radio frequency transceiver 10, so that the first low frequency signal and the second low frequency signal after the low noise amplification can be subjected to the low noise amplification again.

For convenience of description, based on the radio frequency system shown in fig. 6, a signal receiving process of the third receiving path of the first low frequency signal and the second low frequency signal in this embodiment is described:

a third reception path: the first low frequency signal and the second low frequency signal in the space received by the third antenna Ant2 are output to the third filtering unit 410 for filtering, the first low frequency signal and the second low frequency signal after filtering are amplified by the third receiving and amplifying unit 420 and then output to the fifth low noise amplifier 610 of the first amplifying circuit 60, and the fifth low noise amplifier 610 performs secondary low noise amplification on the first low frequency signal and the second low frequency signal and finally output to the radio frequency transceiver 10.

It should be noted that, the foregoing description may be referred to for other receiving paths and transmitting paths, and thus, the description is omitted here.

In the embodiment of the present application, by providing the first amplifying circuit 60 on the radio frequency path between the third filtering unit 410 and the radio frequency transceiver 10, it can be understood that two stages of low noise amplifiers (the fifth low noise amplifier 610 and the third low noise amplifier 421) are provided on the third receiving path, so that the signal strength of the first low frequency signal and the second low frequency signal received on the third receiving path can be improved, the low efficiency of the third antenna Ant2 and the large insertion loss far from the third low noise amplifier 421 can be avoided from affecting the receiving performance of the low frequency signal on the third receiving path, and the receiving performance of the third receiving path on the first low frequency signal and the second low frequency signal can be improved.

With continuing reference to fig. 6 and fig. 7, in one embodiment, the rf system further includes a second amplifying circuit 70 disposed on the rf path between the fourth filtering unit 510 and the rf transceiver 10, for performing low noise amplification processing on the received first low frequency signal and the second low frequency signal. The second amplifying circuit 70 may be disposed on a radio frequency path between the fourth receiving amplifying unit 520 and the radio frequency transceiver 10, or disposed on a radio frequency path between the fourth filtering unit 510 and the fourth receiving amplifying unit 520. The second amplifying circuit 70 may include a sixth low noise amplifier 710. Specifically, the input end of the sixth low-noise amplifier 710 is connected to the output end of the fourth low-noise amplifier 521, and the output end of the sixth low-noise amplifier 710 is connected to the radio frequency transceiver 10, so that the first low-frequency signal and the second low-frequency signal after the low-noise amplification can be subjected to the low-noise amplification again.

For convenience of explanation, based on the radio frequency system shown in fig. 7, a signal receiving process of the fourth receiving path of the first low-frequency signal and the second low-frequency signal in this embodiment is described:

a fourth reception path: the first low frequency signal and the second low frequency signal in the space received by the fourth antenna Ant3 are output to the fourth filtering unit 510 for filtering, the first low frequency signal and the second low frequency signal after filtering are amplified by the fourth receiving and amplifying unit 520 and then output to the sixth low noise amplifier 710 of the second amplifying circuit 70, and the sixth low noise amplifier 710 performs secondary low noise amplification on the first low frequency signal and the second low frequency signal and finally output to the radio frequency transceiver 10.

It should be noted that, the foregoing description may be referred to for other receiving paths and transmitting paths, and details are not repeated here.

In the embodiment of the present application, by providing the second amplifying circuit 70 on the radio frequency path between the fourth filtering unit 510 and the radio frequency transceiver 10, it can be understood that two stages of low noise amplifiers (the sixth low noise amplifier 710 and the fourth low noise amplifier 521) are provided on the fourth receiving path, so that the signal strength of the first low frequency signal and the second low frequency signal received on the fourth receiving path can be improved, the low efficiency of the fourth antenna Ant3 and the large insertion loss far away from the fourth low noise amplifier 521, which affect the receiving performance of the low frequency signal on the fourth receiving path, can also be avoided, and the receiving performance of the fourth receiving path on the first low frequency signal and the second low frequency signal can be improved.

As shown in fig. 8 and 9, in one embodiment, the first transceiving circuit 20 and the second transceiving circuit 30 are respectively configured to switchably connect a first antenna Ant0 and a second antenna Ant1, each of the transceiving circuits is configured to be connected to one antenna, and the antennas connected to the transceiving circuits are different from each other. Wherein the radio frequency system further comprises a switching circuit 80. Two first ends of the switch circuit 80 are respectively connected to the first transceiver circuit 20 and the second transceiver circuit 30 in a one-to-one correspondence manner, and two second ends of the switch circuit 80 are respectively connected to the first antenna Ant0 and the third antenna Ant2 in a one-to-one correspondence manner. It is understood that the first transceiving circuit 20 and the second transceiving circuit 30 can be switchably connected to the first antenna Ant0 and the second antenna Ant1 through the switch circuit 80. In one embodiment, the switching circuit 80 may comprise a double pole double throw switch.

In the embodiment of the present application, the first transceiving circuit 20 and the second transceiving circuit 30 are configured to switchably connect the first antenna Ant0 and the second antenna Ant 1. It is understood that the switch circuit 80 is controlled to be turned on or off, so that the first transceiving path is connected to the first antenna Ant0, and the second transceiving circuit 30 is connected to the second antenna Ant 1. Alternatively, the first transceiving path is connected to the second antenna Ant1, and the second transceiving circuit 30 is connected to the first antenna Ant 0. In the embodiment of the present application, both the first antenna Ant0 and the second antenna Ant1 can support transmission, primary set reception and diversity reception of the first low-frequency signal and the second low-frequency signal.

In this embodiment, the antenna efficiencies of the first antenna Ant0 and the second antenna Ant1 are higher than the efficiencies of the second antenna Ant1 and the fourth antenna Ant3, wherein the target antenna is any one of the first antenna Ant0 and the second antenna Ant1, and the uplink signal can be distributed on the first antenna Ant0 or the second antenna Ant1 with better antenna efficiency, so that the reliability of the uplink signal can be ensured to improve the communication performance of the radio frequency system. Furthermore, by arranging the switch circuit 80, the paths between the first transceiving path and the first antenna Ant0 and the second antenna Ant1, respectively, and the paths between the second transceiving path and the first antenna Ant0 and the second antenna Ant1, respectively, are selectively conducted, so that the uplink signals of the first low-frequency signal and the second low-frequency signal can be distributed on the first antenna Ant0 or the second antenna Ant1 with better antenna efficiency, and the reliability of the uplink signals can be ensured to improve the communication performance of the radio frequency system.

In one embodiment, the radio frequency transceiver 10 is configured with multiple ports, which may include, for example, multiple output ports and multiple input ports. The input ports are configured to receive a first low-frequency signal and a second low-frequency signal input from the antenna side, and the output ports are configured to output the first low-frequency signal and the second low-frequency signal processed by the radio frequency transceiver 10 to the antenna side. The radio frequency transceiver 10 stores configuration information of the first transceiver circuit 20, the second transceiver circuit 30, the first receiving circuit 40, and the second receiving circuit 50. The configuration information may include identification information of ports of the radio frequency transceiver 10, identification information of each antenna, and the like.

The rf transceiver 10 is configured to configure a target antenna connected to the target transceiving path according to the network information of the target low frequency signal received by the first transceiving circuit 20 and the second transceiving circuit 30. Wherein the target low frequency signal is one of the first low frequency signal and the second low frequency signal, and the target transceiver circuitry is configured to support transmission of the target low frequency signal, the target antenna being one of the first antenna Ant0 and the second antenna Ant 1. The network information may include raw and processed information associated with wireless performance metrics of the Received low frequency Signal, such as Signal Strength, Received Power, Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Signal to Noise Ratio (SNR), Rank of MIMO channel matrix (Rank), Carrier to Interference Noise Ratio (RS-CINR), frame error rate, bit error rate, Reference Signal Reception Quality (RSRQ), and the like.

For convenience of explanation, the network information is taken as the received signal strength indicator, the target low frequency signal is the first low frequency signal, and the target transceiver circuit is the first transceiver circuit 20. The rf transceiver 10 may configure the target antenna according to the received signal strength indication of the first low frequency signal received by the first transceiver circuit 20 and the second transceiver circuit 30. If the received signal strength indication of the first transceiver circuit 20 is less than or equal to the received signal strength indication of the second transceiver circuit 30, the antenna connected to the second transceiver circuit 30 is used as the target antenna, and the switch circuit 80 is controlled to connect the target antenna to the second transceiver circuit 30. If the received signal strength indication of the second transceiver circuit 30 is less than or equal to the received signal strength indication of the first transceiver circuit 20, the antenna connected to the first transceiver circuit 20 is used as the target antenna, and the switch circuit 80 is controlled to connect the target antenna to the first transceiver circuit 20.

In one embodiment, the first antenna Ant0 is configured as a first default target antenna for supporting the first low frequency signal transmission and primary set reception. The second antenna Ant1 is configured as a second default target antenna for supporting transmission and reception of the second low frequency signal. In a default operating state of the radio frequency system, the first default antenna is configured to be connected to the first transceiver circuitry 20 and the second default antenna is configured to be connected to the second transceiver circuitry 30. In the embodiment of the present application, the default target antenna may be understood as a preferential antenna or an optimal antenna for signal transmission of the radio frequency system in the initial state, which may implement transmission and main set reception of the first low frequency signal and the second low frequency signal.

In the default operating state, the rf transceiver 10 obtains a first received signal strength indicator of the first low frequency signal received by the first transceiver circuit 20 and a second received signal strength indicator of the first low frequency signal received by the second transceiver circuit 30, and if a difference between the second received signal strength indicator and the first received signal strength indicator is greater than or equal to a predetermined threshold within a predetermined time, the second antenna Ant1 is used as a target antenna connected to the first transceiver circuit 20. After determining the target antenna, the rf transceiver 10 may control the switch circuit 80 to conduct the path between the second antenna Ant1 and the first transceiver circuit 20, and to conduct the path between the first antenna Ant0 and the second transceiver circuit 30. If the difference is smaller than the preset threshold, the first antenna Ant0 is continuously used as the target antenna connected to the first transceiver circuit 20, and the current working state is maintained. It should be noted that, in the embodiment of the present application, the preset threshold is all larger than a zero value, and the size of the preset threshold may be set as needed.

Optionally, in the default operating state, the rf transceiver 10 may obtain a first received signal strength indication of the second low frequency signal received by the first transceiver circuit 20 and a second received signal strength indication of the second low frequency signal received by the second transceiver circuit 30, and if a difference between the first received signal strength indication and the second received signal strength indication is greater than or equal to a preset threshold within a preset time, use the first antenna Ant0 as a target antenna connected to the second transceiver circuit 30. After determining the target antenna, the rf transceiver 10 may control the switch circuit 80 to conduct the path between the first antenna Ant0 and the second transceiver circuit 30, and to conduct the path between the second antenna Ant1 and the first transceiver circuit 20. If the difference is smaller than the preset threshold, the second antenna Ant1 is continuously used as the target antenna connected to the second transceiver circuit 30, and the current working state is maintained. It should be noted that, in the embodiment of the present application, the preset threshold is all larger than a zero value, and the size of the preset threshold may be set as needed.

In the embodiment of the application, by setting the judgment condition of the preset threshold, frequent switching between the antennas caused by the fact that the signal strength of the antennas may be constantly changing can be prevented, and further, the influence of the transmission efficiency of the antennas 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.

Through set up this radio frequency system on communication equipment, can support 4 x 4MIMO function down to first low frequency signal, and support 2 x 2MIMO function down to the second low frequency signal, for the radio frequency system that only can support first low frequency signal 2 x 2MIMO to receive in the correlation technique, diversity reception gain that can improve one time, its downstream coverage distance also increases one time, and then can be multiplied improvement radio frequency system's channel capacity and to the reception performance of first low frequency signal, can promote download rate in order to improve user's experience, simultaneously, when communication equipment is located weak signal environment such as district edge, building depths, elevator and receive through 4 x 4MIMO, higher diversity gain and bigger coverage distance have.

As shown in fig. 10, further taking the communication device as a mobile phone 11 for illustration, specifically, as shown in fig. 10, 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 via one or more communication buses or signal lines 29. Those skilled in the art will appreciate that the handset 11 shown in fig. 10 is not intended to be limiting and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. The various components shown in fig. 10 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.

In the description herein, reference to the description of "one of the embodiments," "optionally," or the like 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 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 radio frequency transceiver;

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

the input end of the first transmitting and amplifying unit is connected with the radio frequency transceiver and is used for performing power amplification processing on the first low-frequency signal output by the radio frequency transceiver;

the output end of the first receiving and amplifying unit is connected with the radio frequency transceiver and is used for carrying out low-noise amplification processing on the received first low-frequency signal and the second low-frequency signal;

the first filtering unit is respectively connected with the output end of the first transmitting amplification unit, the input end of the first receiving amplification unit and the first antenna, and is used for filtering the first low-frequency signal output by the first transmitting amplification unit so as to output the first low-frequency signal to the first antenna, and filtering the signal received by the first antenna so as to output the first low-frequency signal and the second low-frequency signal to the first receiving amplification unit.

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

the input end of the second transmitting and amplifying unit is connected with the radio frequency transceiver and is used for performing power amplification processing on the second low-frequency signal output by the radio frequency transceiver;

the output end of the second receiving and amplifying unit is connected with the radio frequency transceiver and is used for performing low-noise amplification processing on the received first low-frequency signal and the second low-frequency signal;

and the second filtering unit is respectively connected with the output end of the second transmitting amplification unit, the input end of the second receiving amplification unit and the second antenna, and is used for filtering the signal output by the second transmitting amplification unit so as to output the signal to the second antenna and filtering the signal received by the second antenna so as to output the first low-frequency signal and the second low-frequency signal to the second receiving amplification unit.

4. The rf system of claim 1, wherein the first and second antennas each have an antenna efficiency higher than an efficiency of the third and fourth antennas, and wherein the rf system further comprises:

and two first ends of the switch circuit are respectively connected to the first transceiver circuit and the second transceiver circuit in a one-to-one correspondence manner, and two second ends of the switch circuit are respectively connected to the first antenna and the second antenna in a one-to-one correspondence manner.

5. The RF system of claim 4, wherein the RF transceiver is configured to configure a target antenna connected to a target transceiver circuit according to network information of a target low-frequency signal received by the first transceiver circuit and the second transceiver circuit, the target antenna is one of the first antenna and the second antenna, the target low-frequency signal is one of the first low-frequency signal and the second low-frequency signal, and the target transceiver circuit is configured to support transmission of the target low-frequency signal.

6. The radio frequency system according to any of claims 1-5, wherein the first receiving circuit is further configured to support receive processing of the second low frequency signal, and the second receiving circuit is further configured to support receive processing of the second low frequency signal.

7. The radio frequency system according to claim 6, wherein the first receiving circuit comprises:

one end of the third filtering unit is connected with the third antenna, and is configured to filter a signal received by the third antenna and output the first low-frequency signal and the second low-frequency signal;

and the input end of the third receiving and amplifying unit is connected with the other end of the third filtering unit, and the output end of the third receiving and amplifying unit is connected with the radio frequency transceiver and is used for receiving the filtered first low-frequency signal and the filtered second low-frequency signal and performing low-noise amplification processing on the received first low-frequency signal and the received second low-frequency signal.

8. The radio frequency system of claim 7, wherein if the efficiency of the first antenna and the second antenna is higher than the efficiency of the third antenna, the radio frequency system further comprises:

the first amplifying circuit is arranged on a radio frequency path between the third filtering unit and the radio frequency transceiver and is used for performing low-noise amplification processing on the first low-frequency signal and the second low-frequency signal received by the third antenna.

9. The radio frequency system according to claim 6, wherein the second receiving circuit comprises:

one end of the fourth filtering unit is connected with the fourth antenna, and is configured to filter a signal received by the fourth antenna and output the first low-frequency signal and the second low-frequency signal;

and the input end of the fourth receiving and amplifying unit is connected with the other end of the fourth filtering unit, and the output end of the fourth receiving and amplifying unit is connected with the radio frequency transceiver and is used for receiving the first low-frequency signal and the second low-frequency signal after filtering processing and performing low-noise amplification processing on the received first low-frequency signal and the second low-frequency signal.

10. The rf system of claim 9, wherein if the efficiency of the first antenna and the second antenna is higher than the efficiency of the fourth antenna, the rf system further comprises:

and the second amplifying circuit is arranged on a radio frequency path between the fourth filtering unit and the radio frequency transceiver and is used for performing low-noise amplification processing on the first low-frequency signal and the second low-frequency signal received by the fourth antenna.

11. The radio frequency system according to claim 1, wherein the first low frequency signal and the second low frequency signal are both low frequency band 4G signals, or the first low frequency signal and the second low frequency signal are both low frequency band 5G signals, or one of the first low frequency signal and the second low frequency signal is a low frequency band 4G signal, and the other is a low frequency band 5G signal.

12. A communication device comprising a radio frequency system according to any of claims 1-11.