CN212909519U

CN212909519U - Radio frequency front-end circuit and electronic equipment

Info

Publication number: CN212909519U
Application number: CN202022482016.4U
Authority: CN
Inventors: 孔根升
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-04-06
Anticipated expiration: 2030-10-30

Abstract

The application discloses radio frequency front-end circuit and electronic equipment belongs to electronic equipment technical field. The radio frequency front-end circuit comprises a radio frequency transceiver, a first radio frequency receiving module, a second radio frequency receiving module and a third radio frequency module, wherein the radio frequency transceiver is respectively connected with the first radio frequency transceiver module, the first radio frequency receiving module, the second radio frequency receiving module and the third radio frequency module; the first switch module is respectively connected with the first radio frequency transceiving module, the first radio frequency receiving module and the combining module; the combining module is respectively connected with the second radio frequency receiving module, the third radio frequency receiving module, the first antenna and the second antenna; the first radio frequency transceiving module and the first radio frequency receiving module are used for processing a first standard signal; the second radio frequency receiving module and the third radio frequency receiving module are used for processing second standard signals; the first antenna and the second antenna both receive signals of a first standard and/or signals of a second standard. This application multiplexing first antenna and second antenna, antenna quantity reduces, reduces the degree of difficulty of antenna design on the electronic equipment, promotes electronic equipment appearance design's degree of freedom simultaneously.

Description

Radio frequency front-end circuit and electronic equipment

Technical Field

The application belongs to the technical field of electronic equipment, and particularly relates to a radio frequency front-end circuit and electronic equipment.

Background

In 5G mobile communication, a Sounding Reference Signal (SRS) function is added to a terminal hardware design, and the SRS is mainly used for uplink channel state information acquisition (frequency division duplex FDD) and downlink channel state information acquisition (TDD). The SRS antenna transmission of the 5G terminal system needs to be completed on the design of terminal hardware, so that the complexity of a radio frequency front-end system of the mobile terminal is increased.

In the existing 4G Long Term Evolution (LTE), adaptive switching between two antennas is required according to a specific scenario. 5G N41 for SRS polling, switching between four antennas is required. The SRS transmission and the adaptive switching of the 4G LTE antenna are two sets of independent switching algorithms, in order to avoid mutual influence between LTE and 5G N41 frequency bands during working under a Non-independent Networking (NSA) mode, generally 6 antennas capable of working in a 2515 MHz-2675 MHz frequency band are needed, and due to the limitations of physical size, appearance and the like, the electronic device needs to be provided with 6 antennas capable of working in a 2515 MHz-2675 MHz frequency band, which is difficult and high in cost, and may influence the appearance of the electronic device.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application aims to provide a radio frequency front-end circuit and electronic equipment, and the radio frequency front-end circuit and the electronic equipment can solve the problems that the antenna layout difficulty of the electronic equipment is high and the cost is high due to the fact that the number of working antennas required for transmitting signals of different network systems is large.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a radio frequency front-end circuit, which is applied to an electronic device, and includes:

the radio frequency transceiver comprises a radio frequency transceiver, a first radio frequency transceiver module, a first radio frequency receiving module, a second radio frequency receiving module, a third radio frequency receiving module, a first switch module, a combiner module, a first antenna and a second antenna;

the radio frequency transceiver is respectively connected with the first radio frequency transceiving module, the first radio frequency receiving module, the second radio frequency receiving module and the third radio frequency module;

the first switch module is respectively connected with the first radio frequency transceiving module, the first radio frequency receiving module and the combining module;

the combiner module is respectively connected with the second radio frequency receiving module, the third radio frequency receiving module, the first antenna and the second antenna;

the first radio frequency transceiving module and the first radio frequency receiving module are used for processing a first standard signal;

the second radio frequency receiving module and the second radio frequency receiving module are used for processing second standard signals;

and the first antenna and the second antenna both receive the first standard signal and/or the second standard signal.

In a second aspect, an embodiment of the present application provides an electronic device, including the radio frequency front-end circuit according to the first aspect.

In the embodiment of the present application, the rf front-end circuit includes an rf transceiver, a first rf transceiver module, a first rf receiving module, a second rf receiving module, a third rf receiving module, a first switch module, a combiner module, a first antenna, and a second antenna; the radio frequency transceiver is respectively connected with the first radio frequency transceiving module, the first radio frequency receiving module, the second radio frequency receiving module and the third radio frequency module; the first switch module is respectively connected with the first radio frequency transceiving module, the first radio frequency receiving module and the combining module; the combining module is respectively connected with the second radio frequency receiving module, the third radio frequency receiving module, the first antenna and the second antenna; the first radio frequency transceiving module and the first radio frequency receiving module are used for processing a first standard signal; the second radio frequency receiving module and the third radio frequency receiving module are used for processing second standard signals; the first antenna and the second antenna both receive the first system signal and/or the second system signal, so that different network systems can work independently without mutual influence. Meanwhile, the first antenna and the second antenna are multiplexed through the combining module, the number of the antennas is reduced, the difficulty and the complexity of antenna design on the electronic equipment are reduced, and the degree of freedom of appearance design of the electronic equipment is improved.

Drawings

FIG. 1 is one of the schematic diagrams of a radio architecture implementing the 1T2R function supporting NSA and SA;

FIG. 2 is a second schematic diagram of the radio architecture implementing the 2T4R function of supporting 1T2R and SA of NSA;

fig. 3 is a schematic structural diagram of an rf front-end circuit according to an embodiment of the present application;

fig. 4 is a second schematic diagram of an rf front-end circuit according to an embodiment of the present application;

fig. 5 is a schematic diagram of a frequency response characteristic of a combiner according to an embodiment of the application;

fig. 6 is a schematic diagram illustrating a signal flow of an rf front-end circuit according to an embodiment of the present application;

fig. 7 is a second schematic diagram illustrating signal flow during operation of the rf front-end circuit according to the present embodiment.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

In order to make those skilled in the art better understand the rf front-end circuit of the embodiments of the present application, the following description is made.

In 5G mobile communication, current networking modes can be divided into two major categories: a stand-alone networking mode (SA) and a Non-stand-alone networking mode (NSA).

In the New Radio, NR (New Radio, NR) independent networking mode, a New 5G end-to-end network needs to be deployed, including a New access network (NR gNB) and a New Core network (Next Gen Core), and the 5G independently carries a complete Control-Plane (CP) and a User-Plane (UP), so that the 5G can work independently without depending on an LTE network and independently provides communication services for users.

In the non-independent networking mode, the 5G needs to rely on the existing LTE network to anchor the control plane on the LTE network (i.e. LTE carries control signaling), and for user plane data, the control plane is carried by the 5G NR and LTE together, or carried by the 5G NR independently. For the non-independent networking mode, the 5G needs to rely on the existing LTE network to work, and cannot independently provide complete service for users.

At present, electronic equipment (such as a mobile phone) needs to support two modes of NSA and SA simultaneously, and a 5G frequency band applied to a current major real network mainly includes three frequency bands N41/N78/N79 (all of which are TDD systems), where in the NSA mode, the N41 frequency band requires to support an endec combination (LTE and NR dual connectivity) and includes: LTE B3/B39/B40+ NR N41.

And sending an SRS antenna of the 5G terminal system, specifically, sending SRS information on which physical antenna the terminal sends. There are roughly three types of SRS antenna switching methods (hereinafter, SRS antenna switching is performed for the 5G band) that are well-defined at present.

1T 2R: the terminal supports one path of Transmission (TX), and the TX can be switched between two antennas;

2T 4R: the terminal supports two paths of Transmission (TX), and the two paths of TX can be switched on two antennas respectively;

1T 4R: the terminal supports one path of Transmission (TX), and the TX can be switched on four antennas.

It is required that the terminal must support 1T2R for NSA or 2T4R for SA at present. The radio frequency front end architecture is shown in fig. 1 and fig. 2. Wherein fig. 1 supports architecture of 1T2R of NSA and SA, fig. 2 supports architecture of 1T2R of NSA and 2T4R of SA, and 5G N41 of fig. 2 has two TX transmit paths upstream, so upstream 2 x 2MIMO is supported.

The functions of the respective blocks in fig. 1 and 2 will be briefly described below.

1) ANT 1/2/3/4/5/6: six independent antennas, which work in the frequency band of specific needs. The antennas ANT1 and ANT2 work in the medium and high frequency band, and can support the LTE B3/B39/B40/B41/B7 frequency band, namely the frequency of 1710MHz to 2690 MHz. ANT3/4/5/6 operates in high frequency band, and can support NR N41 band, namely frequency 2515MHz to 2675 MHz.

The architectures in fig. 1 and 2 show that N41 of the NR of the terminal supports downlink 4 x 4MIMO, i.e. when downlink reception is performed, the terminal requires simultaneous reception of signals from four antennas. B3/B39/B40/B41/B7 of LTE support downlink 2 × 2MIMO, that is, in downlink reception, a terminal needs to receive signals from two antennas at the same time. In fig. 2, N41 supports uplink 2 × 2MIMO in SA mode, that is, there are two TX transmit paths, TX1 and TX 2.

In addition, only 4G LTE is in operation, only ANT1 and ANT2 and their connected modules are in operation, and ANT3/4/5/6 is not in operation. When the 5G NSA mode is operated, the ANT1/2/3/4/5/6 and the connected modules are operated. When the 5G SA mode works, only the ANT3/4/5/6 and the connected modules work.

2) Double Pole Double Throw (DPDT) switch: the DPDT switch completes the mutual switching of the two paths of radio frequency signals.

The DPDT switch 1# in fig. 1 and fig. 2 is used for switching two rf signals, i.e., LTE TX/PRX (transmission and primary set reception) and LTE DRX (diversity reception), to improve the overall performance of the antenna of the mobile terminal in different holding states.

In fig. 1, DPDT switch 2# is used to implement the 1T2R function of SRS in 5G NSA and SA modes, i.e. N41 TX of NR can switch between ANT3 and ANT 4; the DPDT switch 2# and DPDT switch 3# in fig. 2 are used to implement the function of 2T4R of SRS in SA mode, i.e., TX1 of N41 of NR can be switched between ANT3 and ANT4, and TX2 of N41 of NR can be switched between ANT5 and ANT 6. Similarly, DPDT switch 2# of fig. 2 may also implement the 1T2R function in NSA mode.

3) LTE TX/PRX module: the 4G LTE radio frequency transmitting and main set receiving module completes the amplification of radio frequency signals, sends the radio frequency signals to the antenna after the amplification, sends the received signals to the radio frequency transceiver for processing after primary amplification, and can support frequency bands of LTE B3/B39/B40/B41/B7 and the like.

4) An LTE DRX module: the 4G LTE diversity receiving module is used for primarily amplifying the received signal and then sending the amplified signal to a radio frequency transceiver for processing, and can support frequency bands of LTE B3/B39/B40/B41/B7 and the like.

5) NR TX/RX1 Module in FIG. 2: 5G N41 radio frequency emission and receiving module, completing radio frequency signal amplification, sending to antenna after amplification, and sending one path of received signal to radio frequency transceiver for processing after primary amplification, able to support 5G N41 frequency band. (the NR TX1/RX1 and TX2/RX3 modules in FIG. 3 function similarly).

6) NR RX2/3/4 in FIG. 2: 3 independent receiving modules, which respectively perform primary amplification on signals received from the antenna and then send the signals to a radio frequency transceiver for processing, and can support a 5G N41 frequency band.

7) A radio frequency transceiver: and the transceiver outputs an uplink TX transmitting signal, receives a downlink RX receiving signal, and simultaneously controls the radio frequency transceiver and devices (various switches, a transmitting/receiving module and the like) at the radio frequency front end.

8) A modem: the system is used for completing the demodulation of the signals received by the radio frequency transceiver and sending the modulated signals carrying the information to the radio frequency transceiver. And meanwhile, the control work of devices (various switches, transmitting/receiving modules and the like) of a radio frequency transceiver and a radio frequency front end is carried out.

At present, in a Non-independent Networking (NSA) mode, in order to avoid mutual influence between LTE and 5G N41 frequency bands during operation, generally 6 antennas capable of operating in a 2515 MHz-2675 MHz frequency band are required, and due to limitations of physical size, appearance and the like, the electronic device is required to be provided with 6 antennas capable of operating in a 2515 MHz-2675 MHz frequency band, which is difficult and costly and may affect the appearance of the electronic device.

Based on this, as shown in fig. 3 to 4, an embodiment of the present application provides a radio frequency front end circuit, which is applied to an electronic device, and includes: the radio frequency transceiver 1, the first radio frequency transceiver module 2(LTE TX/PRX), the first radio frequency receiver module 3(LTE DRX), the second radio frequency receiver module 4(NR RX3), the third radio frequency receiver module 5(NR RX4), the first switch module 6(DPDT switch 1#), the combiner module 7, the first antenna 8(ANT1), and the second antenna 9(ANT 2).

The radio frequency transceiver 1 is respectively connected to the first radio frequency transceiver module 2, the first radio frequency receiving module 3, the second radio frequency receiving module 4 and the third radio frequency receiving module 5;

the first switch module 6 is respectively connected with the first radio frequency transceiver module 2, the first radio frequency receiving module 3 and the combiner module 7;

the combiner module 7 is respectively connected to the second radio frequency receiving module 4, the third radio frequency receiving module 5, the first antenna 8 and the second antenna 9;

the first radio frequency transceiving module 2 and the first radio frequency receiving module 3 are used for processing a first standard signal;

the second radio frequency receiving module 4 and the third radio frequency receiving module 5 are used for processing a second standard signal;

the first antenna 8 and the second antenna 9 both receive the first standard signal and/or the second standard signal.

Under the condition that the electronic equipment works in a non-independent networking mode, the combining module 7 receives a first standard signal and a second standard signal input by the first antenna 8, outputs the first standard signal to the first radio frequency transceiving module 2 or the first radio frequency receiving module 3, and outputs the second standard signal to the second radio frequency receiving module 4; or,

the combining module 7 receives the first standard signal and the second standard signal input by the second antenna 9, outputs the first standard signal to the first radio frequency transceiving module 2 or the first radio frequency receiving module 3, and outputs the second standard signal to the third radio frequency receiving module 5.

It should be noted that the first standard signal is a signal in a first frequency range, and supports a first network standard; the second standard signal is a signal in a second frequency range, supports a second network standard, and the maximum frequency in the first frequency range is smaller than the minimum frequency in the second frequency range.

Optionally, the first network system is an LTE network system; the second network standard is a 5G network standard.

As an optional implementation manner, the radio frequency front-end circuit according to this embodiment further includes: a second rf transceiver module 10, a fourth rf receiver module 11, a second switch module 12, a third antenna 13 and a fourth antenna 14.

The second switch module 12 is respectively connected to the second rf transceiver module 10, the fourth rf receiver module 11, the third antenna 13 and the fourth antenna 14; the second rf transceiver module 10 and the fourth rf receiver module 11 are configured to process the second system signal.

Based on this, under the condition that the electronic device works in the non-independent networking mode, the second radio frequency transceiver module 10 or the fourth radio frequency receiver module 11 receives the second standard signal input by the third antenna 13; or,

the second rf transceiver module 10 or the fourth rf receiver module 11 receives the second standard signal input by the fourth antenna 14.

As an optional implementation manner, in a case that the electronic device operates in the first network system, the combining module 7 receives the signal supporting the first network system input by the first antenna 8, and outputs the signal supporting the first network system to the first rf transceiving module 2 or the first rf receiving module 3, or,

the combining module 7 receives the signal supporting the first network system input by the second antenna 9, and outputs the signal supporting the first network system to the first radio frequency transceiving module 2 or the first radio frequency receiving module 3.

The signal supporting the first network standard is a signal in a third frequency range, and the third frequency range includes the first frequency range and the second frequency range.

It should be noted that, optionally, the first radio frequency transceiver module 2 is configured to transceive signals within a frequency range supported by the first network system. Here, the frequency range supported by the first network standard is a third frequency range, and the third frequency range includes the first frequency range and the second frequency range.

The second rf receiving module 4 and the third rf receiving module 5 are configured to receive signals in a frequency range supported by a second network system. Here, the frequency range supported by the second network system is a second frequency range.

Specifically, when the first network system is an LTE network system, the third frequency range is 1710MHz to 2690MHz, and the first antenna 8 and the second antenna 9 operate in a medium-high frequency range and can support LTE B3/B39/B40/B41/B7, where the five frequency ranges are located in the third frequency range.

When the second network system is a 5G network system, the second frequency range is 2515MHz to 2675MHz, and the third antenna 13 and the fourth antenna 14 operate in a high frequency band and can support an NR N41 frequency band.

Here, the combining module 7 is configured to separate signals of different downlink frequency bands. Under the condition that the electronic equipment works in a non-independent networking NSA mode, a first system signal and a second system signal share a first antenna 8 and a second antenna 9, the first system signal supporting a first network system and the second system signal supporting a second network system are separated through a combining module 7 and are respectively output to corresponding radio frequency modules, and therefore different network systems can work independently and are not influenced mutually. Meanwhile, the first antenna 8 and the second antenna 9 are multiplexed through the combining module 7, the number of the antennas is reduced, the difficulty and the complexity of antenna design on the electronic equipment are reduced, and the degree of freedom of appearance design of the electronic equipment is improved.

As an optional implementation manner, the combining module 7 includes: a first single-pole double-throw switch 15, a second single-pole double-throw switch 16, a first combiner 17, a second combiner 18, a third combiner 19 and a fourth combiner 20; wherein, a first end of the first combiner 17 is connected with the first switch module 6; a first end of the second combiner 18 is connected to the first antenna 8; a second end of the first combiner 17 is connected to a second end of the second combiner 18; the first moving end of the first single-pole double-throw switch 15 is connected with the third end of the second combiner 18, the first fixed end of the first single-pole double-throw switch 15 is connected with the third end of the first combiner 17, and the second fixed end of the first single-pole double-throw switch 15 is connected with the second radio frequency receiving module 4; the first end of the third combiner 19 is connected with the first switch module 6; a first end of the fourth combiner 20 is connected to the second antenna 9; a second end of the third hybrid 19 is connected to a second end of the fourth hybrid 20; the first moving end of the second single-pole double-throw switch 16 is connected to the third end of the fourth combiner 20, the first fixed end of the second single-pole double-throw switch 16 is connected to the third end of the third combiner 19, and the second fixed end of the second single-pole double-throw switch 16 is connected to the third rf receiving module 5.

In addition, when the electronic device operates in the non-independent networking mode, the second rf receiving module 4 and the first antenna 8 are turned on through the first single-pole double-throw switch 15; the third rf receiving module 5 and the second antenna 9 are turned on by the second spdt switch 16.

Specifically, the second rf receiving module 4 and the second combiner 18 are turned on by the first single-pole double-throw switch 15. The third rf receiving module 5 and the fourth combiner 20 are turned on by the second single-pole double-throw switch 16.

Here, the first combiner 17 and the second combiner 18 are each configured to separate the first system signal and the second system signal received by the first antenna 8.

Here, the third combiner 19 and the fourth combiner 20 are each configured to separate the first system signal and the second system signal received by the second antenna 9.

Here, in the non-independent networking mode, the first single-pole double-throw switch 15 connects the second rf receiving module 4 and the first antenna 8 (i.e. the first movable terminal of the first single-pole double-throw switch 15 is electrically connected to the second stationary terminal of the first single-pole double-throw switch 15), so that the second standard signal from the first antenna 8 separated by the second combiner 18 is output to the second rf receiving module 4.

The second single-pole double-throw switch 16 connects the third rf receiving module 5 with the second antenna 9 (i.e. the first movable end of the second single-pole double-throw switch 16 is electrically connected with the second stationary end of the second single-pole double-throw switch 16), so that the second system signal from the second antenna 9 separated by the fourth combiner 20 is output to the third rf receiving module 5.

When the electronic device operates in the first network system and the received signal frequency is within the second frequency range, the third terminal of the first combiner 17 and the third terminal of the second combiner 18 are turned on through the first single-pole double-throw switch 15 (that is, the first movable terminal of the first single-pole double-throw switch 15 is electrically connected to the first stationary terminal of the first single-pole double-throw switch 15).

Here, when the electronic device operates in the first network system and the frequency of the received signal is in the second frequency range, that is, the received signal is a high-frequency signal in the first network system, the first single-pole double-throw switch 15 connects the third terminal of the first combiner 17 with the third terminal of the second combiner 18, so that the high-frequency signal in the first network system from the first antenna 8 is output to the first rf transceiver module 2 or the first rf receiver module 3.

It should be noted that, under the condition that the electronic device operates in the first network system, if the first antenna 8 receives not only the high-frequency signal in the first network system but also the intermediate-frequency signal in the first network system, the intermediate-frequency signal is output to the first radio frequency transceiver module 2 or the first radio frequency receiving module 3 through the second end of the second combiner 18 and the second end of the first combiner 17.

Here, the first terminal and the second terminal of the combiner may effectively transmit the intermediate frequency signal in the first network system, and the first terminal and the third terminal of the combiner may effectively transmit the high frequency signal in the first network system and the high frequency signal in the second network system.

And when the electronic device operates in the first network system and the frequency of the received signal is within the second frequency range, the third terminal of the third combiner 19 and the third terminal of the fourth combiner 20 are turned on by the second single-pole double-throw switch 16.

Here, when the electronic device operates in the first network system and the frequency of the received signal is within the second frequency range, that is, the received signal is a high-frequency signal in the first network system, the second single-pole double-throw switch 16 connects the third terminal of the third combiner 19 with the third terminal of the fourth combiner 20, so that the high-frequency signal in the first network system from the second antenna 9 is output to the first rf transceiver module 2 or the first rf receiver module 3.

It should be noted that, when the electronic device operates in the first network system, if the second antenna 9 receives not only the high-frequency signal in the first network system but also the intermediate-frequency signal in the first network system, the intermediate-frequency signal is output to the first radio frequency transceiver module 2 or the first radio frequency receiving module 3 through the second end of the fourth combiner 20 and the second end of the third combiner 19.

It should be noted that the frequency response characteristic curve of the combiner is shown in fig. 5, the combiner is a three-port device, which is shown as p1, p2 and p3 identified in fig. 3 and fig. 4, respectively, wherein the transmission characteristic curve of p1-p2 (i.e., port 1-2) is shown as S (2,1) in fig. 5 (corresponding to the second thick line in the figure), and the transmission characteristic curve of p1-p3 (i.e., port 1-3) is shown as S (3,1) in fig. 5 (corresponding to the thickest line in the figure). S (1,1) corresponds to the thinnest line in the figure.

Optionally, the first switch module 6 is a first double-pole double-throw switch; wherein, the first moving end of the first double-pole double-throw switch is connected with the first radio frequency transceiver module 2; the second moving end of the first double-pole double-throw switch is connected with the first radio frequency receiving module 3; a first fixed end of the first double-pole double-throw switch is connected with a first end of the first combiner 17; the second fixed end of the first double-pole double-throw switch is connected with the first end of the third combiner 19.

Optionally, the second switch module 12 is a second double-pole double-throw switch; wherein, the first moving end of the second double-pole double-throw switch is connected with the second rf transceiver module 10; the second moving end of the second double-pole double-throw switch is connected with the fourth radio frequency receiving module 11; the first fixed end of the second double-pole double-throw switch is connected with the third antenna 13; the second fixed terminal of the second double pole double throw switch is connected to the fourth antenna 14.

As an alternative implementation manner, as shown in fig. 4, the rf front-end circuit according to this embodiment of the present application further includes: a third rf transceiver module 21 and a third double-pole double-throw switch 22, wherein the third rf transceiver module 21 includes the second rf receiving module 4.

Wherein, the first moving end of the third double-pole double-throw switch 22 is connected with the third rf transceiver module 21;

the second moving end of the third double-pole double-throw switch 22 is connected with the third radio frequency receiving module 5;

a first fixed end of the third double-pole double-throw switch 22 is connected with a second fixed end of the first single-pole double-throw switch 15;

the second fixed terminal of the third double pole double throw switch 22 is connected to the second fixed terminal of the second single pole double throw switch 16.

When the electronic device operates in the non-independent networking mode, the first single-pole double-throw switch 15 turns on the third rf transceiver module 21 and the first antenna 8, and the second single-pole double-throw switch 16 turns on the third rf receiver module 5 and the second antenna 9.

Here, the third rf transceiver module 21 is configured to transceive signals in a frequency range supported by the second network system. Here, the second rf receiving module 4 is integrated into the third rf transceiving module 21, and the third rf transceiving module 21 has transmitting and receiving functions.

Here, the rf front-end circuit according to the embodiment of the present application may further include: a modem 23 connected to the radio frequency transceiver 1.

It should be noted that the rf front-end circuit shown in fig. 3 has a function of 1T2R supporting NSA and SA; the radio frequency front-end circuit shown in fig. 4 is adopted to support the 1T2R of NSA and the 2T4R function of SA.

The signal flow in fig. 6 and 7 is explained below in two application scenarios.

As shown in fig. 6, in the LTE-only scenario, two antennas, a first antenna 8 and a second antenna 9, are used. The signal flow of the LTE medium and high frequency bands (generally, the frequency bands supported by the electronic device by default may include LTE B3/B39/B40/B41/B7) is specifically as follows:

in the LTE B3/B39/B40, the first RF transceiver module 2 signal passes through: first antenna 8-second port of second combiner 18-second port of first combiner 17-first double pole double throw switch 6.

In LTE B41/B7, the first RF transceiver module 2 signals pass through: the first antenna 8-the third port of the second combiner 18-the third port of the first combiner 17-the first double pole double throw switch 6; the signal flow directions of the first rf receiving module 3 are similar, see the arrow in fig. 6, and are not described herein again.

Here, the combiner functions to separate the intermediate frequency signal LTE B3/B39/B40 from the high frequency signal B41/B7.

In this scenario, the first single-pole double-throw switch 15 turns on the first combiner 17 and the second combiner 18.

As shown in fig. 7, in the N41 NSA scenario, the first antenna 8, the second antenna 9, the third antenna 13, and the fourth antenna 14 are used. The signal flow of the LTE middle band and the signal flow of the N41 high band are specifically as follows:

in the LTE B3/B39/B40, the first RF transceiver module 2 signal passes through: first antenna 8-second port of second combiner 18-second port of first combiner 17-first double pole double throw switch 6. The signal flow directions of the first rf receiving module 3 are similar, see arrows in fig. 7, and are not described herein again.

N41, the second rf receiving module 4 signal passes through: first antenna 8-third port of second combiner 18-first single pole double throw switch 15. The signal flow direction of the third rf receiving module 5 is similar, see fig. 7 for arrows, and is not described herein again.

The second rf transceiver module 10 passes signals: third antenna 13-second double pole double throw switch 12. The signal flow directions of the fourth rf receiving module 11 are similar, see the arrow in fig. 7, and are not described herein again.

It should be noted that the radio architecture of fig. 7 supports the endec combination of LTE B3/B39/B40+ NR N41 in the NSA mode, and signals of the LTE frequency band can be adaptively switched between the first antenna 8 and the second antenna 9. The first antenna 8 and the second antenna 9 are shared by the LTE B3/B39/B40 and the NR N41, and because the ports 1-2 and 1-3 of the combiner can be simultaneously conducted, the LTE and the NR can work independently without mutual influence. Meanwhile, the number of the antennas is reduced to 4 compared with that of the existing 6 antennas, so that the difficulty of antenna design on the electronic equipment is reduced. For the SA mode, NR N41 uses four antennas, a first antenna 8, a second antenna 9, a third antenna 13, and a fourth antenna 14. When N41 works, LTE does not work, and is simpler than the NSA mode architecture, and is not described again.

The radio frequency front-end circuit comprises a radio frequency transceiver, a first radio frequency transceiver module, a first radio frequency receiving module, a second radio frequency receiving module, a third radio frequency receiving module, a first switch module, a combining module, a first antenna and a second antenna; the radio frequency transceiver is respectively connected with the first radio frequency transceiving module, the first radio frequency receiving module, the second radio frequency receiving module and the third radio frequency module; the first switch module is respectively connected with the first radio frequency transceiving module, the first radio frequency receiving module and the combining module; the combining module is respectively connected with the second radio frequency receiving module, the third radio frequency receiving module, the first antenna and the second antenna; the first radio frequency transceiving module and the first radio frequency receiving module are used for processing a first standard signal; the second radio frequency receiving module and the third radio frequency receiving module are used for processing second standard signals; the first antenna and the second antenna both receive the first system signal and/or the second system signal, so that different network systems can work independently without mutual influence. Meanwhile, the first antenna and the second antenna are multiplexed through the combining module, the number of the antennas is reduced, the difficulty and the complexity of antenna design on the electronic equipment are reduced, and the degree of freedom of appearance design of the electronic equipment is improved.

An embodiment of the present application further provides an electronic device, including the radio frequency front end circuit according to the foregoing embodiment.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

While preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the true scope of the embodiments of the application.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A radio frequency front-end circuit applied to an electronic device, comprising:

the radio frequency transceiver is respectively connected with the first radio frequency transceiving module, the first radio frequency receiving module, the second radio frequency receiving module and the third radio frequency receiving module;

the second radio frequency receiving module and the third radio frequency receiving module are used for processing second standard signals;

2. The rf front-end circuit of claim 1, further comprising: the second radio frequency transceiving module, the fourth radio frequency receiving module, the second switch module, the third antenna and the fourth antenna;

the second switch module is respectively connected with the second radio frequency transceiving module, the fourth radio frequency receiving module, the third antenna and the fourth antenna;

the second radio frequency transceiving module and the fourth radio frequency receiving module are used for processing second standard signals.

3. The rf front-end circuit of claim 1, wherein the combining module comprises: the first single-pole double-throw switch, the second single-pole double-throw switch, the first combiner, the second combiner, the third combiner and the fourth combiner;

the first end of the first combiner is connected with the first switch module;

the first end of the second combiner is connected with the first antenna;

the second end of the first combiner is connected with the second end of the second combiner;

the first moving end of the first single-pole double-throw switch is connected with the third end of the second combiner, the first fixed end of the first single-pole double-throw switch is connected with the third end of the first combiner, and the second fixed end of the first single-pole double-throw switch is connected with the second radio frequency receiving module;

the first end of the third combiner is connected with the first switch module;

a first end of the fourth combiner is connected with the second antenna;

the second end of the third combiner is connected with the second end of the fourth combiner;

the first movable end of the second single-pole double-throw switch is connected with the third end of the fourth combiner, the first immovable end of the second single-pole double-throw switch is connected with the third end of the third combiner, and the second immovable end of the second single-pole double-throw switch is connected with the third radio frequency receiving module.

4. The rf front-end circuit of claim 3, wherein the first switch module is a first double-pole double-throw switch;

the first moving end of the first double-pole double-throw switch is connected with the first radio frequency transceiving module; the second moving end of the first double-pole double-throw switch is connected with the first radio frequency receiving module; a first fixed end of the first double-pole double-throw switch is connected with a first end of the first combiner; and the second fixed end of the first double-pole double-throw switch is connected with the first end of the third combiner.

5. The rf front-end circuit of claim 2, wherein the second switch module is a second double-pole double-throw switch;

the first movable end of the second double-pole double-throw switch is connected with the second radio frequency transceiving module; the second moving end of the second double-pole double-throw switch is connected with the fourth radio frequency receiving module; the first fixed end of the second double-pole double-throw switch is connected with the third antenna; and the second fixed end of the second double-pole double-throw switch is connected with the fourth antenna.

6. The rf front-end circuit of claim 3, further comprising: the third radio frequency transceiving module comprises a second radio frequency receiving module and a second double-pole double-throw switch;

the first moving end of the third double-pole double-throw switch is connected with the third radio frequency transceiving module;

the second moving end of the third double-pole double-throw switch is connected with the third radio frequency receiving module;

the first fixed end of the third double-pole double-throw switch is connected with the second fixed end of the first single-pole double-throw switch;

and the second fixed end of the third double-pole double-throw switch is connected with the second fixed end of the second single-pole double-throw switch.

7. The rf front-end circuit of claim 1, further comprising:

a modem connected to the radio frequency transceiver.

8. An electronic device comprising the radio frequency front end circuit according to any one of claims 1 to 7.