CN111970022B

CN111970022B - Radio frequency circuit and electronic device

Info

Publication number: CN111970022B
Application number: CN202010858101.8A
Authority: CN
Inventors: 韦仁杰; 易伟
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2022-03-15
Anticipated expiration: 2040-08-24
Also published as: CN111970022A

Abstract

The application discloses radio frequency circuit and electronic equipment belongs to communication technology field, and this radio frequency circuit includes: the antenna comprises a radio frequency transceiver, a first switch module, a first transmitting module, a second switch module and M antennas; the radio frequency transceiver comprises a first transmission port; the input end of the first switch module is connected with the first transmitting port, and two output ends of the first switch module are respectively connected with the input ends of the first transmitting module and the second transmitting module; the output ends of the first transmitting module and the second transmitting module are respectively connected to the M antennas through the second switch module; the first transmitting port is conducted with the first transmitting module under the condition that the first switch module is in a first state, and the first transmitting port is conducted with the second transmitting module under the condition that the first switch module is in a second state; the first transmitting module is used for transmitting a first network system radio frequency signal and a second network system radio frequency signal, and the second transmitting module is used for transmitting a second network system radio frequency signal.

Description

Radio frequency circuit and electronic device

Technical Field

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

Background

For 5G terminals, in order to obtain better user experience, there are multiple Antenna switching functions, i.e., Antenna switching Diversity (ASDiv) function; however, in a Non-independent Networking (NSA) scenario, in order to satisfy that a Long Term Evolution (LTE) band and a New Radio (NR) band do not conflict with each other in Signal Path (Signal Path) configuration and Antenna Path (Antenna Path) configuration, a terminal adopts a 6-Antenna scheme design, as shown in fig. 5. Since the design scheme of 6 antennas uses a large number of antennas, which occupy a large space of the terminal, the related art designs a scheme of 5 antennas, as shown in fig. 6.

In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art:

the radio frequency architecture in the related art, the layout in the terminal is shown in fig. 1 and 2. As can be seen from fig. 1, the distances from the antennas 3 and 4 connected to the N41 rf transceiving module to the switch module are relatively long, which results in relatively large routing loss from the antennas 3 and 4 to the switch module, or as can be seen from fig. 2, the distances from the antennas 4 connected to the N41 rf transceiving module to the switch module are relatively long, which results in relatively large routing loss from the antennas 4 to the switch module.

Disclosure of Invention

An object of the embodiments of the present application is to provide a radio frequency circuit and an electronic device, which can solve the problem of large routing loss of an antenna and a switch module for transmitting or receiving an N41 radio frequency signal in an existing antenna layout architecture.

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 circuit, including: the antenna comprises a radio frequency transceiver, a first switch module, a first transmitting module, a second switch module and M antennas;

the radio frequency transceiver comprises a first transmission port;

the input end of the first switch module is connected with the first transmitting port, and two output ends of the first switch module are respectively connected with the input ends of the first transmitting module and the second transmitting module;

the output ends of the first transmitting module and the second transmitting module are respectively connected to the M antennas through the second switch module;

the first transmitting port is conducted with the first transmitting module when the first switch module is in a first state, and the first transmitting port is conducted with the second transmitting module when the first switch module is in a second state;

the first transmitting module is used for transmitting a first network system radio frequency signal and a second network system radio frequency signal, and the second transmitting module is used for transmitting a second network system radio frequency signal.

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

In this embodiment, by providing the first switch module, a radio frequency signal (e.g., an N41 radio frequency signal) transmitted by the first transmitting port can be transmitted through the first transmitting module and also can be transmitted through the second transmitting module, and the two transmitting modules are respectively connected to different antennas, for example, the first transmitting module is connected to the antenna 1 and the antenna 2, and the second transmitting module is connected to the antenna 3 and the antenna 4, so that an antenna with a smaller trace loss can be selected to transmit the radio frequency signal.

Drawings

Fig. 1 is one of layout diagrams of an antenna in the related art;

fig. 2 is a second schematic layout diagram of an antenna in the related art;

FIG. 3 is a schematic diagram of an embodiment of a RF circuit;

FIG. 4 is a second schematic diagram of an RF circuit according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an RF circuit according to the related art;

FIG. 6 is a second schematic diagram of a related art RF circuit;

fig. 7 is a block diagram of an electronic device according to an embodiment of the present application.

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.

The processing method of the multi-open application provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

An embodiment of the present application provides a radio frequency circuit, as shown in fig. 3 and 4, including: a radio frequency transceiver 101, a first switch module 102, a first transmission module 103, a second transmission module 104, a second switch module (SW1 and SW2 in fig. 3, or SW1 in fig. 4), and M antennas;

the radio frequency transceiver 101 comprises a first transmission port 1011;

an input end of the first switch module 102 is connected to the first transmitting port 1011, and two output ends of the first switch module 102 are respectively connected to input ends of the first transmitting module 103 and the second transmitting module 104;

the output ends of the first transmitting module 103 and the second transmitting module 104 are connected to M antennas through the second switch module, respectively; specifically, the first transmitting module is respectively connected to an antenna 1 and an antenna 2, and the second transmitting module is respectively connected to an antenna 3 and an antenna 4;

when the first switch module 102 is in the first state, the first transmitting port 1011 is conducted with the first transmitting module 103, and when the first switch module 102 is in the second state, the first transmitting port 1011 is conducted with the second transmitting module 104;

the first transmitting module 103 is configured to transmit a first network radio frequency signal and a second network radio frequency signal, and the second transmitting module 104 is configured to transmit a second network radio frequency signal. That is, the first transmitting module and the second transmitting module can both transmit a second network radio frequency signal, such as an N41 radio frequency signal.

For example, the first transmitting module 103 is configured to transmit an N41 rf signal and an LTE B41 rf signal, and the second transmitting module 104 is configured to transmit an N41 rf signal.

In this embodiment, by providing the first switch module, the N41 rf signal can be transmitted through the first transmission module (B41 transmission module in the LTE module) (i.e., transmitted through the antenna 1 and the antenna 2), or transmitted through the second transmission module (N41TRX1 module) (i.e., transmitted through the antenna 3 or the antenna 4), i.e., an antenna with smaller trace loss can be selected to transmit the N41 rf signal.

The radio frequency circuit of this application embodiment, through setting up above-mentioned first switch module, the radio frequency signal (like N41 radio frequency signal) that first transmission port transmitted can be sent through first transmission module, also can send through second transmission module, and two transmission modules are connected with different antennas respectively, for example, first transmission module is connected with antenna 1 and antenna 2, and second transmission module is connected with antenna 3 and antenna 4 to can select the antenna that the line loss is less to send when transmitting above-mentioned radio frequency signal.

Optionally, as shown in fig. 3 and 4, the radio frequency circuit according to the embodiment of the present application further includes:

the third transmitting module 105, the third switching module 106, the first phase shifter and the second phase shifter, wherein the third transmitting module 105 is used for transmitting a first network system radio frequency signal;

wherein the radio frequency transceiver comprises a second transmit port 1012;

the input terminal 105 of the third transmitting module is connected to the second transmitting port 1012;

the output end of the third transmitting module 105 is connected to one end of the first phase shifter, and the output end of the first transmitting module 103 is connected to one end of the second phase shifter;

the other end of the first phase shifter and the other end of the second phase shifter are both connected with a first input end of the third switch module, and an output end of the third switch module is connected with the second switch module.

In this embodiment, the third transmitting module may be configured to transmit an LTE B3 radio frequency signal.

A first phase shifter is arranged between the third transmitting module and the third switch module, and a second phase shifter is arranged between the first transmitting module and the third switch module. When the third transmitting module and the first transmitting module work simultaneously, aiming at the working frequency band of a certain radio frequency module, the phase shifter in the radio frequency module is matched with the phase shifters and the filters on other radio frequency modules, so that the signal of the working frequency band presents high impedance, and further the signal is prevented from leaking to other radio frequency modules as little as possible, and the energy loss of the working frequency band is reduced to the minimum. In addition, when signals of other frequency bands are transmitted to the port of the phase shifter in the radio frequency module, the signals of other frequency bands can be reflected back, and therefore energy loss of the signals of other radio frequency modules can be reduced.

In the embodiment of the present application, the first phase shifter is disposed between the third transmitting module and the third switch module, and the second phase shifter is disposed between the first transmitting module and the third switch module, so that when the third transmitting module and the first transmitting module communicate simultaneously (i.e. when different frequency bands communicate simultaneously), energy loss of radio frequency signals in the two transmitting modules is greatly reduced.

Optionally, the radio frequency circuit of the embodiment of the present application is further characterized by comprising:

a first receiving module 107, a second receiving module 108, a third phase shifter and a fourth phase shifter;

the radio frequency transceiver 101 comprises a first receiving port 1013 and a second receiving port 1014;

the output end of the first receiving module 107 is connected to the first receiving port 1013, and the output end of the second receiving module 108 is connected to the second receiving port 1014;

an input end of the first receiving module 107 is connected to one end of the third phase shifter, and an input end of the second receiving module 108 is connected to one end of the fourth phase shifter;

the other end of the third phase shifter and the other end of the fourth phase shifter are both connected with a second input end of the third switch module;

the first receiving module is used for receiving a first network system radio frequency signal and a second network system radio frequency signal, and the second receiving module is used for receiving a second network system radio frequency signal.

For example, the first receiving module is configured to receive LTE B41 radio frequency signals and N41 radio frequency signals; the second receiving module is used for receiving an LTE B3 radio frequency signal.

A third phase shifter is arranged between the first receiving module and the third switch module, and a fourth phase shifter is arranged between the second receiving module and the third switch module. When the first receiving module and the second receiving module work simultaneously, the energy loss of the radio frequency signals in the two receiving modules is greatly reduced.

Optionally, the first switch module 102 includes a first double-pole double-throw switch, one moving end of the first double-pole double-throw switch is connected to the first transmitting port, the other moving end of the first double-pole double-throw switch is connected to the other transmitting port for transmitting the N41 radio frequency signal, and two fixed ends of the first double-pole double-throw switch are respectively connected to the input ends of the first transmitting module and the second transmitting module.

Optionally, the output end of the second transmitting module is connected to the first antenna or the second antenna through the second switch module, and the output end of the first transmitting module is connected to the third antenna or the fourth antenna through the second switch module;

the first distance and the second distance are both smaller than a first preset threshold, and the third distance and the fourth distance are both larger than a second preset threshold;

the first distance is a distance between the first antenna and the second switch module, the second distance is a distance between the second antenna and the second switch module, the third distance is a distance between the third antenna and the second switch module, and the fourth distance is a distance between the fourth antenna and the second switch module.

Here, the antenna layout is as shown in fig. 1, and the radio frequency architecture shown in fig. 3 is adopted. The third antenna and the fourth antenna connected with the N41 transceiving module are far away from the second switch module, and the first antenna and the second antenna connected with the N41 transceiving module are near to the second switch module, so that the N41 radio frequency signal can be selectively transmitted through the first transmitting module (the B41 transmitting module in the LTE module) (namely, transmitted through the antenna 1 and the antenna 2) to solve the problem of large antenna routing loss.

When the antenna layout is as shown in fig. 2 (i.e. the antenna 4 connected to the N41TRX module is far from the switch module), the rf architecture shown in fig. 4 is adopted.

Optionally, as shown in fig. 3 and 4, the third switch module 106 includes:

a first single pole double throw switch;

the first fixed end of the first single-pole double-throw switch is connected with the other end of the first phase shifter and the other end of the second phase shifter respectively, and the movable end of the first single-pole double-throw switch is connected with the second switch module.

Further optionally, the third switch module further includes:

a second single pole double throw switch;

and a first fixed end of the second single-pole double-throw switch is respectively connected with the other end of the third phase shifter and the other end of the fourth phase shifter, and a movable end of the second single-pole double-throw switch is connected with the second switch module.

In addition, the radio frequency architectures shown in fig. 3 and 4 can also solve the problem of resource conflict between the LTE DRX path and the NR DRX mimo in the existing radio frequency architecture.

The following description will first be made of the conventional radio frequency architecture.

For the radio frequency architecture shown in fig. 5, in an EUTRA-NR Dual Connection (En-DC) scenario, for example, the Path mapping relations corresponding to the scenario are shown in table 1 and table 2, where table 1 is the antenna switching diversity state 0(ASDIV configuration 0) of LTE B3, and table 2 is the antenna switching diversity state 1(ASDIV configuration 1) of LTE B3. In the following table, PRX refers to primary set reception, DRX refers to diversity reception, PRX MIMO refers to primary set reception multiple-input multiple-output, and DRX MIMO refers to diversity reception multiple-input multiple-output; SW refers to a switch. Tx denotes transmission and RX denotes reception.

For convenience of description, the subsequent En-DC combination is illustrated with the B3+ N41 band:

TABLE 1

TABLE 2

From the above tables 1 and 2, it can be seen that the antenna in the En-DC scenario has no multiplexing relationship, but this requires the use of 6-antenna solution, and the more the number of antennas used is, the greater the sacrifice of appearance is in the present day when the space of the mobile phone is increasingly tight.

A typical 5-antenna scheme is shown in fig. 6 (since N41 and B41 are co-frequency, i.e., N41 RX4 and LTE B41 DRX share a common path).

The radio frequency architecture shown in fig. 6, for the En-DC scenario, the antenna mapping relationship is shown in tables 3 and 4:

TABLE 3

TABLE 4

As can be seen from tables 3 and 4, the mapping of the N41 DRX MIMO Antenna is on the same Antenna as that of the LTE B3 DRX Antenna, and in the case of implementing the ASDiv scenario, there is a collision of Antenna (Antenna) Path resources in N41 RX4, which mainly appears as follows:

when the frequency band of N41 realizes the SRS function, the N41 TX occupies LTE DRX Path resources when being mapped to a DRX MIMO antenna, resulting in LTE DRX disconnection.

As can be seen from the above description, if the ASDiv function requirement is to be satisfied, the conventional 5-antenna rf architecture has a problem that the LTE DRX path conflicts with the NR DRX MIMO resource, for example, when the NR band ASDiv (or SRS) is in an NR band state, the switch state of 3P3T (SW1) changes, so that the DRX link of LTE is passively interrupted, and the antenna performance in different scenarios is more or less affected without using the ASDiv function.

For the rf architecture shown in fig. 3, when the antenna switches to the diversity state 0, the antenna mapping relationship is shown in table 5.

TABLE 5

When the LTE B3 TRX switches antennas, N41 RX3 and RX4 switch N41 RX1 and RX4 through the LTE TX module and the switch of SW3, as shown in table 6, so that the antenna resources corresponding to the path of the radio frequency transceiver are not changed.

TABLE 6

Taking N41 RX4 as an example, in table 5 and table 6, the default state config0 (ANT1 is used for B3 TRX), and at this time N41 RX4 corresponds to the first path (SW 3-filter-SW 4-second input terminal of third switch module-SW 1-antenna 1), when the B3 antenna is switched to ANT2, i.e. config1, at this time N41 RX4 corresponds to the second path (SW3-N41 TX 2-second input terminal of first switch module-SW 1-antenna 1), i.e. the antenna resource corresponding to N41 RX4 is always ANT1, so as to solve the problem of antenna resource conflict.

In addition, in a certain situation, when LTE B3 and N41 TX perform optimally on the same antenna (ANT1 or ANT2), by using the radio frequency architecture in fig. 3 in this embodiment, B3 and N41 may transmit on the same antenna, and there is no situation that N41 TX cannot transmit on ANT1 after LTE B3 is switched to ANT1 (assuming ANT1 is optimal), so that the problem that LTE and NR transmit contend for the antenna when NR and LTE share the antenna is solved.

In addition, the radio frequency architecture of the present application may also implement 1T4R functionality.

Specifically, after passing through the N41TRX1 module, N41 TX1 may emit at ANT3 or 4; after passing through the LTE TX module and SW1, N41 TX1 may transmit at ANT1 or 2.

The radio frequency architecture shown in fig. 3 realizes the LTE and NR antenna switching function in an En-DC scenario, solves the problem of resource conflict caused by LTE switching in an En-DC scenario, and simultaneously realizes the purpose that N41 En-DC is reduced from the original six antennas to four antennas, and in addition, the N41 receiving module can be used for LTE B414 × 4MIMO reception.

An embodiment of the present application further provides an electronic device, including the radio frequency circuit described above.

It should be noted that, the electronic device according to the embodiment of the present application can implement all the implementation manners in the foregoing radio frequency transceiver embodiment, and details are not described here again.

Fig. 7 is a schematic diagram of a hardware structure of an electronic device implementing an embodiment of the present application.

The electronic device 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710.

Those skilled in the art will appreciate that the electronic device 700 may also include a power supply (e.g., a battery) for powering the various components, and the power supply may be logically coupled to the processor 710 via a power management system, such that the functions of managing charging, discharging, and power consumption may be performed via the power management system. The electronic device structure shown in fig. 7 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is omitted here.

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 circuit, comprising: the antenna comprises a radio frequency transceiver, a first switch module, a first transmitting module, a second switch module and M antennas;

the radio frequency transceiver comprises a first transmission port;

the first transmitting module is used for transmitting a first network system radio frequency signal and a second network system radio frequency signal, and the second transmitting module is used for transmitting a second network system radio frequency signal;

the third transmitting module is used for transmitting a first network system radio frequency signal;

wherein the radio frequency transceiver comprises a second transmit port;

the input end of the third transmitting module is connected with the second transmitting port;

the output end of the third transmitting module is connected with one end of the first phase shifter, and the output end of the first transmitting module is connected with one end of the second phase shifter;

2. The radio frequency circuit of claim 1, further comprising:

the first receiving module, the second receiving module, the third phase shifter and the fourth phase shifter;

the radio frequency transceiver comprises a first receiving port and a second receiving port;

the output end of the first receiving module is connected with the first receiving port, and the output end of the second receiving module is connected with the second receiving port;

the input end of the first receiving module is connected with one end of the third phase shifter, and the input end of the second receiving module is connected with one end of the fourth phase shifter;

3. The radio frequency circuit of claim 1, wherein the first switch module comprises a first double-pole double-throw switch.

4. The RF circuit of claim 1, wherein the output terminal of the second transmitting module is connected to the first antenna or the second antenna through the second switch module, and the output terminal of the first transmitting module is connected to the third antenna or the fourth antenna through the second switch module;

5. The radio frequency circuit of claim 2, wherein the third switch module comprises:

a first single pole double throw switch;

6. The RF circuit of claim 5, wherein the third switch module further comprises:

a second single pole double throw switch;

7. An electronic device comprising a radio frequency circuit as claimed in any one of claims 1 to 6.