WO2015124090A1

WO2015124090A1 - Radio-frequency circuit and terminal device

Info

Publication number: WO2015124090A1
Application number: PCT/CN2015/073037
Authority: WO
Inventors: 魏孔刚; 张明; 刘雪亮; 钟梅芳
Original assignee: 华为终端有限公司
Priority date: 2014-02-19
Filing date: 2015-02-13
Publication date: 2015-08-27
Also published as: CN104852749B; CN104852749A

Abstract

A radio-frequency circuit and a terminal device. The radio-frequency circuit comprises: a radio-frequency transceiver (10) which is used for outputting an uplink signal; an antenna (20) which is used for transmitting the uplink signal; an amplification channel (30) which is connected between the radio-frequency transceiver (10) and the antenna (20) and is used for amplifying the uplink signal; a bypass channel (40) which is arranged in parallel with the amplification channel (30), is connected between the radio-frequency transceiver (10) and the antenna (20), and is used for enabling the uplink signal to bypass the amplification channel (30); a processor (60) which is used for outputting a first switching signal according to the output power of the uplink signal and the target transmitting power of the antenna (20); and a first switching switch (50) which is used for realizing the switching between the amplification channel (30) and the bypass channel (40) under the control of the first switching signal. The switching between the amplification channel (30) and the bypass channel (40) is controlled by the first switching switch, so that the gain of power consumption difference between the bypass channel (40) and the amplification channel (30) is obtained, and the consumption of the electric quantity of the radio-frequency circuit is reduced.

Description

RF circuit and terminal equipment

The present application is filed on February 19, 2014, the disclosure of which is hereby incorporated by reference.

Technical field

Embodiments of the present invention relate to communication technologies, and in particular, to a radio frequency circuit and a terminal device.

Background technique

Power Amplifier (PA) is mainly used for: small signal amplification, output power increased signal. The output signal of the power amplifier in the wireless terminal device is matched by the signal and transmitted through the antenna.

A common RF circuit block diagram is shown in FIG. 1. The RF transceiver 11 outputs an RF signal, and the RF signal is amplified by the power amplifier 12, and then connected to the antenna 14 via the switch 13 for air interface transmission. The power amplifier 12 can separately amplify each frequency band of the radio frequency signal according to its own bandwidth and system settings.

In the existing RF circuit, when the air interface channel is good (for example, 0 dB), the power amplifier can not power-amplify the signal, and is only used for circuit connection. However, the power consumption of the power amplifier is about 20 mA at this time.

Summary of the invention

Embodiments of the present invention provide a radio frequency circuit and a terminal device.

In a first aspect, an embodiment of the present invention provides a radio frequency circuit, including: a radio frequency transceiver, an antenna, an amplifying channel, a bypass channel, a first switching switch, and a processor, where:

The radio frequency transceiver is configured to output an uplink signal;

The amplification channel is connected between the radio frequency transceiver and the antenna for amplifying the uplink signal;

The bypass channel is disposed in parallel with the amplification channel and is connected to the radio frequency transceiver and the Between the antennas, for causing the uplink signal to bypass the amplification channel;

The processor is configured to output a first switching signal according to an output power of the uplink signal and a target transmit power of the antenna;

The first switch is configured to implement switching of the amplifying channel and the bypass channel under the control of the first switching signal;

The antenna is configured to transmit the uplink signal.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the radio frequency circuit further includes a first transceiver splitter, the first switch is a single pole double throw switch, and the amplification channel includes a power amplifier The radio frequency transceiver is connected to the power amplifier, the bypass channel is connected to the radio frequency transceiver, and the first end of the single pole double throw switch is connected to the power amplifier, and the second end of the single pole double throw switch The bypass channel is connected, and the third end of the single-pole double-throw switch is connected to the first transceiver, and the first transceiver is connected to the antenna.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the first transceiver splitter connects the antenna through a matching circuit.

In conjunction with the first aspect, in a third possible implementation manner of the first aspect, the first switch is a single-pole double-throw switch, the amplifying channel includes a power amplifier and a second transceiver, and the bypass channel includes a a three transceiver separator; the power amplifier is connected to the radio frequency transceiver, the second transceiver separator is connected to the power amplifier, and the third transceiver separator is connected to the radio frequency transceiver, the single pole double The first end of the throw switch is connected to the second transceiver splitter, and the second end of the single pole double throw switch is connected to the third transceiver splitter, and the third end of the single pole double throw switch is connected to the antenna.

In conjunction with the third possible implementation of the first aspect, in a fourth possible implementation of the first aspect, the third end of the single-pole double-throw switch is connected to the antenna through a matching circuit.

In conjunction with the first aspect, in a fifth possible implementation manner of the first aspect, the radio frequency circuit further includes a fourth transceiver splitter, the first switch is a single pole double throw switch, and the amplification channel includes a power amplifier a first end of the single pole double throw switch is connected to the power amplifier, a second end of the single pole double throw switch is connected to the bypass channel, and a third end of the single pole double throw switch is connected to the radio frequency transceiver The fourth transceiver splitter connects the power amplifier and the bypass channel, and the antenna is connected to the fourth transceiver splitter.

In conjunction with the fifth possible implementation of the first aspect, the sixth possible implementation in the first aspect In the current mode, the antenna is connected to the fourth transceiver by a matching circuit.

With reference to the first aspect, in a seventh possible implementation manner of the first aspect, the amplifying channel includes a power amplifier and a fifth transceiver, the bypass channel includes a sixth transceiver, and the first switch is a single-pole double-throw switch, the first end of the single-pole double-throw switch is connected to the power amplifier, the power amplifier is connected to the fifth transceiver, and the second end of the single-pole double-throw switch is connected to the sixth transceiver a third end of the single-pole double-throw switch connected to the radio frequency transceiver, the fifth transceiver splitter and the sixth transceiver splitter are connected to one end of the microstrip transmission line, and the other end of the microstrip transmission line Connect the antenna.

In conjunction with the seventh possible implementation of the first aspect, in an eighth possible implementation of the first aspect, the other end of the microstrip transmission line is connected to the antenna through a matching circuit.

With reference to the first aspect, in a ninth possible implementation manner of the first aspect, the radio frequency circuit further includes a second switch, the processor is further configured to use, according to an output power of the uplink signal, the antenna The target transmission power outputs a second switching signal, and the second switching switch is configured to implement switching of the amplification channel and the bypass channel under the control of the second switching signal.

In conjunction with the ninth possible implementation of the first aspect, in a tenth possible implementation manner of the first aspect, the amplifying channel includes a power amplifier and a seventh transceiver, and the bypass channel includes an eighth transceiver a splitter, the first switch is a single pole double throw switch, the second switch is a single pole double throw switch, a first end of the first switch is connected to the power amplifier, and the power amplifier is connected to the a seventh transceiver, the second end of the first switch is connected to the eighth transceiver, the third end of the first switch is connected to the radio frequency transceiver, and the second switch is One end is connected to the seventh transceiver, the second end of the second switch is connected to the eighth transceiver, and the third end of the second switch is connected to the antenna.

In conjunction with the tenth possible implementation of the first aspect, in an eleventh possible implementation manner of the first aspect, the third end of the second switch is connected to the antenna through a matching circuit.

In conjunction with the ninth possible implementation of the first aspect, in a twelfth possible implementation manner of the first aspect, the radio frequency circuit further includes a ninth transceiver splitter, the amplification channel includes a power amplifier, The first switch is a single-pole double-throw switch, the second switch is a single-pole double-throw switch, the first end of the first switch is connected to the power amplifier, and the second end of the first switch is connected a bypass channel, a third end of the first switch is connected to the radio frequency transceiver, a first end of the second switch is connected to the power amplifier, and the second switch is The second end is connected to the bypass channel, the third end of the second switch is connected to the ninth transceiver, and the antenna is connected to the ninth transceiver.

In conjunction with the twelfth possible implementation of the first aspect, in a thirteenth possible implementation manner of the first aspect, the third end of the second switch is connected to the ninth transceiver by a matching circuit .

With reference to the first aspect, any one of the first to thirteenth possible implementation manners of the first aspect, in the fourteenth possible implementation manner of the first aspect, the processor is a baseband processor The baseband processor is coupled to the radio frequency transceiver.

In conjunction with the fourteenth possible implementation of the first aspect, in a fifteenth possible implementation of the first aspect, the baseband processor and the radio frequency transceiver are integrated.

In a second aspect, the embodiment of the present invention provides a terminal device, including: the radio frequency circuit according to any one of the first aspects.

The embodiment of the invention obtains the bypass channel set in parallel with the amplification channel, and selects the amplification channel or the bypass channel to transmit the uplink signal output by the RF transceiver through the first switch, thereby obtaining the power consumption difference between the bypass channel and the amplification channel. Revenue, reducing the consumption of radio frequency circuit power.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural view of a prior art radio frequency circuit;

2 is a schematic structural diagram of Embodiment 1 of a radio frequency circuit according to the present invention;

3 is a schematic structural diagram of Embodiment 2 of a radio frequency circuit according to the present invention;

4 is a schematic structural diagram of Embodiment 3 of a radio frequency circuit according to the present invention;

5 is a schematic structural diagram of Embodiment 4 of a radio frequency circuit according to the present invention;

6 is a schematic structural diagram of Embodiment 5 of a radio frequency circuit according to the present invention;

7 is a schematic structural diagram of Embodiment 6 of a radio frequency circuit according to the present invention;

8 is a schematic structural diagram of Embodiment 7 of a radio frequency circuit according to the present invention;

9 is a schematic structural diagram of Embodiment 8 of a radio frequency circuit according to the present invention;

FIG. 10 is a schematic structural diagram of Embodiment 9 of a radio frequency circuit according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly described in conjunction with the drawings in the embodiments of the present invention. Some embodiments, rather than all of the embodiments, are invented. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 2 is a schematic structural diagram of Embodiment 1 of a radio frequency circuit according to the present invention. The embodiment of the present invention provides a radio frequency circuit. As shown in FIG. 2, the circuit includes a radio frequency transceiver 10, an antenna 20, an amplifying channel 30, a bypass channel 40, a first switch 50, and a processor 60.

The RF transceiver 10 can be used for outputting an uplink signal; the antenna 20 can be used for transmitting uplink signals; and the amplification channel 30 is connected between the RF transceiver 10 and the antenna 20 for performing uplink signals output by the RF transceiver 10. The bypass channel 40 is disposed in parallel with the amplification channel 30, and is connected between the RF transceiver 10 and the antenna 20 for bypassing the output signal outputted by the RF transceiver 10 by the amplification channel 30; the first switch 50 is connected in series The amplifying channel 30 and the bypass channel 40 are used for switching between the amplifying channel 30 and the bypass channel 40; the processor 60 is connected to the radio frequency transceiver 10 for outputting power according to the uplink signal and the target power of the antenna 20, A first switching signal is output, the first switching signal controlling switching of the first switching switch 50 between the amplification channel 30 and the bypass channel 40.

As can be seen from the above, the embodiment of the present invention provides a bypass channel that is disposed in parallel with the amplification channel, and controls the uplink signal output by the RF transceiver through the first switch to transmit in the amplification channel or the bypass channel, thereby The signal provides a passive path, so that when the uplink signal outputted by the RF transceiver satisfies the uplink power requirement received by the base station, the uplink signal is controlled to be transmitted to the antenna through the bypass channel, and the power consumption difference between the bypass channel and the amplification channel is obtained. Reduce the power consumption of the RF circuit.

In the embodiment of the present invention, the first switching signal output by the processor 60 is used to control the first switching switch 50, so that the uplink signal is switched between the amplification channel 30 and the bypass channel 40. Only shown in Figure 2 An uplink signal, in actual application, may also have multiple uplink signals according to multiple bandwidth requirements. By setting a plurality of first switching switches, each first switching switch may correspond to a first switching signal, and the first switching is performed. The signal controls the first changeover switch such that the upstream signal switches between the amplification channel 30 and the bypass channel 40.

It can be understood that, on the premise that the signal power of the transmitting end of the antenna 20 satisfies the uplink power requirement (base station protocol) received by the base station, the uplink signal is outputted by the radio frequency transceiver 10, and the uplink power requirement can be met without being amplified by the amplification channel 30. The uplink signal may be transmitted through the bypass channel 40 via the antenna 20; otherwise, the uplink signal may be amplified by the amplification channel 30 and then transmitted by the antenna 20. For example, when the output power of the uplink signal is 50 decibels (Decibel, abbreviated as dB), the power loss is 5 dB during transmission to the antenna 20, and the target transmission power of the antenna 20 is 43 dB, in this case, the antenna The actual transmit power of 20 is 45 dB (50 dB - 5 dB = 45 dB), which is greater than its own target transmit power. Therefore, the uplink signal can be transmitted to the antenna 20 through the bypass channel 40 and transmitted through the antenna 20. For another example, when the output power of the uplink signal is 50 dB, the power loss is 5 dB during transmission to the antenna 20, and the target transmission power of the antenna 20 is 46 dB, in this case, the actual transmission power of the antenna 20 is 45 dB. It is smaller than its own target transmission power. Therefore, the upstream signal is amplified by the amplification channel 30, transmitted to the antenna 20, and transmitted through the antenna 20. Wherein, the target transmit power of the antenna 20 can be determined and adjusted according to the requirements of the base station.

It should be noted that the uplink signal in any embodiment of the present invention may be understood as an uplink signal sent by the antenna, and the downlink signal may be understood as a downlink signal received by the antenna.

The technical solutions of the method embodiment shown in FIG. 2 are described in detail below by using several specific embodiments.

In an implementation manner, on the basis of the embodiment shown in FIG. 2, as shown in FIG. 3, the RF circuit may further include a first transceiver splitter 70, and the first switch 50 is a single-pole double-throw switch 501, and the amplification channel 30 includes a power amplifier 31, the RF transceiver 10 is connected to the power amplifier 31, the bypass channel 40 is connected to the RF transceiver 10, the first end of the single-pole double-throw switch 501 is connected to the power amplifier 31, and the second end of the single-pole double-throw switch 501 is connected The third end of the single channel double throw switch 501 is connected to the first transceiver splitter 70, and the first transceiver splitter 70 is connected to the antenna 20.

The antenna 20 can also be configured to receive a downlink signal, where the downlink signal is separated by the first transceiver. 70, the downlink signal is transmitted to the radio frequency transceiver 10, please refer to the Rx shown in FIG. 3; the first transceiver splitter 70 can be a transceiver duplexer or a filter for separating the uplink signal and the downlink signal, thereby reducing Interference between signals. In this embodiment, the bypass channel 40 can be a microstrip feed line. In addition, the microstrip feeder can be configured to meet the RF impedance matching requirement, wherein the microstrip feeder can transmit the uplink signal to the input end of the antenna 20 with a small power loss, or the downlink signal received by the antenna 20 can be smaller. The loss is transmitted to the input of the RF transceiver 10 (e.g., the downstream signal is passed through the first transceiver splitter 70 and then passed through the first switch 50 to the RF transceiver 10 via the microstrip feeder). The microstrip feeder itself does not pick up or generate spurious interference signals.

In any embodiment of the invention, processor 60 may also generate a PA enable control signal for controlling whether the power amplifier is in an enabled state. When the bypass channel 40 is selected as the uplink signal transmission path, the PA enable control signal performs a corresponding "non-enable" action on the power amplifier, so that the power amplifier is in a state of being turned off or the power consumption is minimum, thereby achieving energy saving. Optionally, the first switching signal and the PA enable control signal may be the same signal, or may be designed as independent signals according to different timing requirements.

Optionally, the antenna 20 can also be configured to receive a downlink signal. Under the control of the first switching signal, the first switching switch 50 is in communication with the bypass channel 40, and the downstream signal is transmitted to the radio frequency transceiver 10 via the bypass channel 40 through the first transceiver separator 70 and the first switching switch 50.

FIG. 4 is a schematic structural diagram of Embodiment 3 of a radio frequency circuit according to the present invention. Further, based on the embodiment shown in FIG. 3, the radio frequency circuit may further include a matching circuit 80. As shown in FIG. 4, the first transceiver separator 70 is connected to the antenna 20 through a matching circuit 80. The matching circuit 80 can be a circuit composed of a capacitor and/or an inductor in parallel, and is used for matching matching parameters of the amplification channel 30 and the bypass channel 40 to achieve impedance matching between the antenna 20 and the power amplifier 31.

Specifically, the matching circuit 80 can be fine-tuned according to different signal bandwidths. The circuit can be designed as a passive tunable parameter circuit, and the matching parameter corresponding to the signal bandwidth is determined by commissioning, and the signal bandwidth is switched when the signal bandwidth is switched. The corresponding matching parameters also take effect at the same time, realizing the dynamic adjustment of the matching parameters of the signal transmission channel, and improving the parameter matching when the multi-transmission channel is switched. Optionally, the processor 60 may also generate a dynamic matching control signal for controlling the matching circuit 80 to match the signal transmission channel selected by the radio frequency circuit. For example, a matching parameter transmitted for the uplink signal of the same frequency band in the amplification channel 30 and the bypass channel 40; or a matching parameter transmitted for the uplink signal of the different frequency band in the amplification channel 30 or the bypass channel 40. The size of the matching parameters can be The commissioning phase is set according to the actual designed RF circuit.

In addition, an interface having general electrical characteristics may be disposed on the matching circuit 80, for example, a Mobile Industry Processor Interface (MIPI), an Inter-Integrated Circuit (IIC), or the like. A common or private definition interface, etc., is selected from the above interfaces as an output interface by an external system on chip (SoC), thereby realizing the purpose of dynamically adjusting the matching impedance in different bandwidths. In the system block diagram given in this embodiment, the SoC can be integrated and designed in the processor 60, and the MIPI interface can be used. Of course, other interface types can be adopted as needed, and details are not described herein. Alternatively, the SoC may also be set independently of the processor 60, which is not limited by the present invention.

It should be noted that the connection relationship between the matching circuit 80 and the antenna 20 may be a "variable impedance" type as shown in FIG. 4 or a "tunable capacitance" type design in parallel. In a parallel scenario, the matching circuit is placed in parallel with the antenna. Among them, the RF loss generated by the parallel arrangement to the RF circuit is less than the RF loss generated by the series arrangement to the RF circuit.

In another implementation manner, on the basis of the embodiment shown in FIG. 2, as shown in FIG. 5, the first switch 50 is a single-pole double-throw switch 502, and the amplification channel 30 may include a power amplifier 32 and a second transceiver. 33. The bypass channel 40 can include a third transceiver splitter 41; the power amplifier 32 is coupled to the RF transceiver 10, the second transceiver splitter 33 is coupled to the power amplifier 32, and the third transceiver splitter 41 is coupled to the RF transceiver 10. The first end of the single-pole double-throw switch 502 is connected to the second transceiver splitter 33. The second end of the single-pole double-throw switch 502 is connected to the third transceiver splitter 41, and the third end of the single-pole double-throw switch 502 is connected to the antenna 20.

In this embodiment, the second transceiver splitter 33 and the third transceiver splitter 41 are separately disposed in the amplifying channel 30 and the bypass channel 40, and can be a transceiver duplexer or a filter for separating the uplink signal and the downlink signal. Therefore, interference between signals can be reduced. The second transceiver separator 33 is configured to amplify the separation of the uplink signal and the downlink signal in the channel 30, and the third transceiver separator 41 is configured to bypass the separation of the uplink signal and the downlink signal in the channel 40. The second transceiver splitter 33 and the third transceiver splitter 41 may be the same or different, and are respectively designed according to the power consumption of the two transmission channels, thereby further reducing the RF loss introduced by the branch channel.

Further, the third end of the single-pole double-throw switch 502 is connected to the antenna 20, and the third end of the single-pole double-throw switch 502 can be connected to the antenna 20 through the matching circuit 90. The matching circuit 90 in this embodiment has the same function and function as the matching circuit 80 in the above embodiment, and details are not described herein again.

In another implementation manner, on the basis of the embodiment shown in FIG. 2, as shown in FIG. 6, the radio frequency circuit may further include a fourth transceiver splitter 100, and the first switch 50 is a single-pole double-throw switch 503, and the amplification channel 30 may include a power amplifier 34. The first end of the single-pole double-throw switch 503 is connected to the power amplifier 34. The second end of the single-pole double-throw switch 503 is connected to the bypass channel 40, and the third end of the single-pole double-throw switch 503 is connected to the RF transceiver 10. The fourth transceiver separator 100 is connected to the power amplifier 34 and the bypass channel 40, and the antenna 20 is connected to the fourth transceiver separator 100. The bypass channel 40 can be a microstrip feeder; the fourth transceiver separator 100 can be a transceiver duplexer or a filter for separating the uplink signal and the downlink signal, thereby reducing interference between signals.

In this embodiment, the third end of the single-pole double-throw switch 503 is connected to the radio frequency transceiver 10. Therefore, the uplink signal outputted by the radio frequency transceiver 10 passes through the single-pole double-throw switch 503, and then passes through the amplification channel 30 or the bypass channel 40. The fourth transceiver separator 100 is transmitted to the antenna 20. Generally, the uplink signal output by the radio frequency transceiver 10 is a small signal, and the power of the small signal is less than or equal to the power of the signal amplified by the small signal via the power amplifier 34. The switch passes a small signal (for example, RF). RF signal), the small signal requires less volume, impedance, etc. for the switch, so the cost of the switch can be reduced (ie, realized at low cost). Before the single-pole double-throw switch 503 is set in the PA, the design of the single-pole double-throw switch 503 only needs to meet the requirements of the small signal. The single-pole double-throw switch 503 passes the RF signal, and the single-pole double-throw switch is set after the power amplifier. In comparison, in the structure shown in FIG. 6 of the present invention, the single-pole double-throw switch 503 has a small volume, which is advantageous for low-cost implementation, can achieve the same electrical characteristic index at a lower cost, and can also reduce the radio frequency of the radio frequency circuit. In addition, in the scenario where the output port of the radio frequency transceiver 10 is small, the third end of the single-pole double-throw switch 503 in this embodiment is connected to the radio frequency transceiver 10, so that a certain signal of the radio frequency transceiver 10 can be used (for example, The uplink signal is transmitted via the amplification channel 30 or the bypass channel 40, so that the output port of the RF transceiver 10 can be effectively utilized, and the power amplifier 34 in the amplification channel is connected through the first end of the single-pole double-throw switch 503, and the single-pole double-throw switch The second end of the 503 is connected to the bypass passage 40.

Further, the antenna 20 is connected to the fourth transceiver separator 100 through a matching circuit (not shown). The matching circuit in this embodiment has the same function and function as the matching circuit 80 in the above embodiment, and details are not described herein again.

In another implementation, on the basis of the embodiment shown in FIG. 2, as shown in FIG. 7, the amplification channel 30 may include a power amplifier 35 and a fifth transceiver separator 36, and the bypass channel 40 may include a sixth transceiver. The first switch 50 is a single pole double throw switch 504, and the single pole double throw switch 504 The first end is connected to the power amplifier 35, the power amplifier 35 is connected to the fifth transceiver separator 36, the second end of the single-pole double-throw switch 504 is connected to the sixth transceiver separator 42, and the third end of the single-pole double-throw switch 504 is connected to the RF transceiver. 10. The fifth transceiver separator 36 and the sixth transceiver separator 42 are connected to one end of the microstrip transmission line, and the other end of the microstrip transmission line is connected to the antenna 20.

The difference between this embodiment and the embodiment shown in FIG. 6 is that, in this embodiment, the fifth transceiver splitter 36 and the sixth transceiver splitter 42 are independently disposed in the amplifying channel 30 and the bypass channel 40, and the fifth transceiver is separately provided. The splitter 36 and the sixth transceiver splitter 42 may be transceiver duplexers or filters for separating the uplink signal and the downlink signal, thereby reducing interference between signals. The fifth transceiver separator 36 is configured to amplify the separation of the uplink signal and the downlink signal in the channel 30, and the sixth transceiver separator 42 is configured to bypass the separation of the uplink signal and the downlink signal in the channel 40. The fifth transceiver splitter 36 and the sixth transceiver splitter 42 may be the same or different, and are respectively designed according to the power consumption of the two transmission channels, thereby further reducing the RF loss introduced by the branch channel.

Further, the other end of the microstrip transmission line is connected to the antenna 20, and the other end of the microstrip transmission line may be connected to the antenna 20 through a matching circuit (not shown). The matching circuit in this embodiment has the same function and function as the matching circuit 80 in the above embodiment, and details are not described herein again.

In another implementation manner, on the basis of the embodiment shown in FIG. 2, as shown in FIG. 8, the radio frequency circuit may further include a second switch 51, and the processor 60 may further be configured to output power and an antenna according to the uplink signal. The target transmission power of 20 outputs a second switching signal, and the second switching switch 51 is configured to implement switching of the amplification channel 30 and the bypass channel 40 under the control of the second switching signal.

The target transmit power of the antenna 20 can be determined and adjusted according to the requirements of the base station. Specifically, the target transmit power setting of the antenna 20 can be implemented by signaling interaction between the base station and the terminal device where the radio frequency circuit is located. The power loss of the amplifying channel 30 and the bypass channel 40 in the radio frequency circuit may be acquired in the commissioning phase, or may be pre-stored in the terminal device, so that the processor 60 according to the power loss of the transmission channel and the target transmit power of the antenna 20 and The output power of the uplink signal outputs a second switching signal to control a transmission channel of the uplink signal.

It should be noted that the second switching signal and the first switching signal in the foregoing embodiment may be the same or different, and the two switching signals may be operated synchronously to ensure that one of the amplifying channel 30 and the bypass channel 40 is transmitted as an uplink signal. aisle. Alternatively, the second switch 51 can be integrated in the RF transceiver 10 to shorten the inter-component wiring to reduce line insertion loss and signal loss, and improve RF circuit performance.

Further, on the basis of the embodiment shown in FIG. 8, as shown in FIG. 9, the amplification channel 30 may include a power amplifier 37 and a seventh transceiver separator 38, and the bypass channel 40 may include an eighth transceiver separator 43, The switch 150 is a single-pole double-throw switch, the second switch 51 is a single-pole double-throw switch, the first end of the first switch 50 is connected to the power amplifier 37, and the power amplifier 37 is connected to the seventh transceiver 38, the first switch The second end of the switch 150 is connected to the RF transceiver 10, the first end of the second switch 51 is connected to the seventh transceiver, and the second switch 51 is connected to the second transceiver switch 51. The second end is connected to the eighth transceiver separator 43, and the third end of the second switch 51 is connected to the antenna 20. Optionally, the third end of the second switch 51 is connected to the antenna 20. The third end of the second switch 51 may be connected to the antenna 20 through a matching circuit (not shown). The matching circuit in this embodiment has the same function and function as the matching circuit 80 in the above embodiment, and details are not described herein again.

FIG. 10 is a schematic structural diagram of Embodiment 9 of a radio frequency circuit according to the present invention. As shown in FIG. 10, on the basis of the embodiment shown in FIG. 2, in this embodiment, the radio frequency circuit may further include a second switch 52 and a ninth transceiver splitter 110, and the amplifying channel 30 may include a power amplifier 39, The switch 150 is a single-pole double-throw switch, and the second switch 52 is a single-pole double-throw switch. The first end of the first switch 50 is connected to the power amplifier 39, and the second end of the first switch 50 is connected to the bypass channel 40. The third end of the first switch 50 is connected to the RF transceiver 10, the first end of the second switch 52 is connected to the power amplifier 39, the second end of the second switch 52 is connected to the bypass channel 40, and the second switch 52 is The third end is connected to the ninth transceiver splitter 110, and the antenna 20 is connected to the ninth transceiver splitter 110.

Optionally, the third end of the second switch 52 is connected to the ninth transceiver splitter 110. The third end of the second switch 52 may be connected to the ninth transceiver splitter 110 through a matching circuit (not shown). The matching circuit in this embodiment has the same function and function as the matching circuit 80 in the above embodiment, and details are not described herein again. In this embodiment, the bypass channel 40 can be a microstrip feed line. In addition, the microstrip feeder can meet the RF impedance matching requirements.

Based on the foregoing embodiment, the processor 60 may be a baseband processor (BBP), and the baseband processor is connected to the radio frequency transceiver 10. Alternatively, the baseband processor and the RF transceiver can be integrated to reduce the length of the line connection, thereby reducing RF circuit power loss.

In any embodiment of the invention, the switching action of the first changeover switch 50 can also be controlled by a system (eg, a processor). Wherein, the system controls the operation of the first switch 50, and the system controls the shot The frequency transceiver 10 selects the operation actions of the two output ports to be synchronized, thereby ensuring that one of the amplification channel and the bypass channel is used as the uplink signal path, that is, the system controls the first switch 50 to switch to the amplification channel 30 (or the bypass channel 40). At the same time, the control RF transceiver 10 selects an output port connected to the amplification channel 30 (or the bypass channel 40) for output. When the uplink signal is good (the uplink signal power satisfies the uplink power requirement received by the base station), the bypass channel is used to transmit the uplink signal, which can reduce the power consumption in the RF circuit.

The baseband processor generates a first switching signal, a second switching signal, a dynamic matching control signal, and a PA enable control signal according to physical layer measurements. The physical layer measurement refers to that after the threshold value of the switch is set, according to the actual measurement result of the current signal, it is compared with the set threshold value; according to the comparison result, it is determined that the current signal is suitable for the amplification channel or the bypass channel, thereby The selection of the current signal transmission channel is completed under the premise of lower power consumption. Specifically, the switching control of the two transmission channels can be performed by using the register in the RF transceiver 10; or the switching control of the switching switch is performed by using a General Purpose Input Output (GPIO) signal to ensure transmission. The channel (amplification channel or bypass channel) is turned on or off at the same time. While the bypass channel 40 is turned on as the transmission channel of the uplink signal, the state of the PA enable control signal in the amplification channel 30 is adjusted to be "disabled", so that the PA is in a state of being turned off or the power consumption is minimum. Thereby, the power consumption of the amplification channel 30 is reduced to the micro-ampere level, and energy saving can be achieved. Optionally, the first switching signal, the second switching signal, the dynamic matching control signal, and the PA enable control signal may be the same control signal.

An embodiment of the present invention provides a terminal device, including the radio frequency circuit provided by any of the foregoing embodiments, by providing a bypass channel disposed in parallel with the amplification channel, and controlling the uplink signal output by the radio transceiver through the first switch. The amplification channel or the bypass channel is transmitted, thereby providing a passive path for the uplink signal, obtaining the power consumption difference between the bypass channel and the amplification channel, reducing the power consumption of the RF circuit, and improving the performance of the RF circuit.

One of ordinary skill in the art will appreciate that all or part of the steps to implement the various method embodiments described above may be accomplished by hardware associated with the program instructions. The aforementioned program can be stored in a computer readable storage medium. The program, when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not limited thereto; although the present invention has been described in detail with reference to the foregoing embodiments, common in the art The skilled person should understand that the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the essence of the corresponding technical solutions. The scope of the technical solutions of the various embodiments.

Claims

An RF circuit, comprising: a radio frequency transceiver, an antenna, an amplification channel, a bypass channel, a first switch, and a processor, wherein:

The radio frequency transceiver is configured to output an uplink signal;

The amplification channel is connected between the radio frequency transceiver and the antenna for amplifying the uplink signal;

The bypass channel is disposed in parallel with the amplification channel, and is connected between the radio frequency transceiver and the antenna, so that the uplink signal bypasses the amplification channel;

The processor is configured to output a first switching signal according to an output power of the uplink signal and a target transmit power of the antenna;

The first switch is configured to implement switching of the amplifying channel and the bypass channel under the control of the first switching signal;

The antenna is configured to transmit the uplink signal.
The radio frequency circuit according to claim 1, wherein the radio frequency circuit further comprises a first transceiver splitter, the first switch is a single pole double throw switch, and the amplification channel comprises a power amplifier, and the radio frequency transceiver Connecting the power amplifier, the bypass channel is connected to the radio frequency transceiver, a first end of the single pole double throw switch is connected to the power amplifier, and a second end of the single pole double throw switch is connected to the bypass a third end of the single pole double throw switch is connected to the first transceiver splitter, and the first transceiver splitter is connected to the antenna.
The radio frequency circuit according to claim 2, wherein said first transceiver is connected to said antenna through a matching circuit.
The radio frequency circuit according to claim 1, wherein the first switching switch is a single pole double throw switch, the amplification channel comprises a power amplifier and a second transceiver splitter, and the bypass channel comprises a third transceiver splitter; The power amplifier is connected to the radio frequency transceiver, the second transceiver splitter is connected to the power amplifier, and the third transceiver splitter is connected to the radio frequency transceiver, the first of the single pole double throw switch The second transceiver splitter is connected to the second transceiver splitter, and the third end of the single pole double throw switch is connected to the antenna.
The radio frequency circuit according to claim 4, wherein the third end of the single pole double throw switch is connected to the antenna through a matching circuit.
The radio frequency circuit according to claim 1, wherein said radio frequency circuit further comprises a transceiver switch, the first switch is a single-pole double-throw switch, the amplification channel includes a power amplifier, a first end of the single-pole double-throw switch is connected to the power amplifier, and a second of the single-pole double-throw switch The end is connected to the bypass channel, the third end of the single pole double throw switch is connected to the radio frequency transceiver, the fourth transceiver splitter is connected to the power amplifier and the bypass channel, and the antenna is connected to the antenna The fourth transceiver splitter.
The radio frequency circuit according to claim 6, wherein said antenna is connected to said fourth transceiver block through a matching circuit.
The radio frequency circuit according to claim 1, wherein the amplification channel comprises a power amplifier and a fifth transceiver splitter, the bypass channel comprises a sixth transceiver splitter, and the first switch is a single pole double throw switch, a first end of the single pole double throw switch is connected to the power amplifier, the power amplifier is connected to the fifth transceiver splitter, and a second end of the single pole double throw switch is connected to the sixth transceiver splitter, The third end of the single pole double throw switch is connected to the radio frequency transceiver, the fifth transceiver splitter and the sixth transceiver splitter are connected to one end of the microstrip transmission line, and the other end of the microstrip transmission line is connected to the antenna.
The radio frequency circuit according to claim 8, wherein the other end of the microstrip transmission line is connected to the antenna through a matching circuit.
The radio frequency circuit according to claim 1, wherein the radio frequency circuit further comprises a second switch, the processor, further configured to: according to an output power of the uplink signal and a target transmit power of the antenna, And outputting a second switching signal, where the second switching switch is configured to implement switching of the amplification channel and the bypass channel under the control of the second switching signal.
The radio frequency circuit according to claim 10, wherein the amplifying channel comprises a power amplifier and a seventh transceiver, the bypass channel comprises an eighth transceiver, and the first switch is a single pole double throw a switch, the second switch is a single-pole double-throw switch, a first end of the first switch is connected to the power amplifier, and the power amplifier is connected to the seventh transceiver, the first switch The second end is connected to the eighth transceiver, the third end of the first switch is connected to the radio frequency transceiver, and the first end of the second switch is connected to the seventh transceiver, The second end of the second switch is connected to the eighth transceiver, and the third end of the second switch is connected to the antenna.
The radio frequency circuit according to claim 11, wherein the third end of the second switch is connected to the antenna through a matching circuit.
The radio frequency circuit according to claim 10, wherein the radio frequency circuit further comprises a ninth transceiver splitter, the amplification channel comprises a power amplifier, the first switch is a single pole double throw switch, and the second The switch is a single-pole double-throw switch, the first end of the first switch is connected to the power amplifier, the second end of the first switch is connected to the bypass channel, and the third switch is connected to the third The first transceiver is connected to the power amplifier, the second end of the second switch is connected to the power amplifier, the second end of the second switch is connected to the bypass channel, and the second switch is connected to the third The end is connected to the ninth transceiver splitter, and the antenna is connected to the ninth transceiver splitter.
The radio frequency circuit according to claim 13, wherein the third end of the second switch is connected to the ninth transceiver splitter through a matching circuit.
The radio frequency circuit according to any one of claims 1 to 14, wherein the processor is a baseband processor, and the baseband processor is connected to the radio frequency transceiver.
The radio frequency circuit of claim 15 wherein said baseband processor and said radio frequency transceiver are integrated.
A terminal device, comprising: the radio frequency circuit according to any one of claims 1-16.