阅读说明：本技术 一种多相位移相器和多相位移相方法 (Multiphase phase shifter and multiphase phase shifting method ) 是由 彭洋洋 李平 李阳 于 2021-09-27 设计创作，主要内容包括：本申请实施例提出了一种多相位移相器和多相位移相方法,多相位移相器包括：正交信号发生器、差分加法器,控制器和放大电路；控制器的输出端分别与正交信号发生器的输入端、差分加法器的第一输入端连接,控制器用于基于输入射频信号的频率生成第一控制信号,基于目标移相角度生成第二控制信号；正交信号发生器的输出端与差分加法器的第二输入端连接,正交信号发生器用于基于第一控制信号产生对应频率的正交信号；差分加法器的输出端与放大电路的输入端连接,差分加法器用于基于第二控制信号对正交信号进行矢量合成,输出第一同相正交信号；放大电路,用于对第一同相正交信号进行功率放大,输出第二同相正交信号。(The embodiment of the application provides a multiphase phase shifter and a multiphase phase shifting method, and the multiphase phase shifter comprises: the device comprises an orthogonal signal generator, a differential adder, a controller and an amplifying circuit; the output end of the controller is respectively connected with the input end of the orthogonal signal generator and the first input end of the differential adder, and the controller is used for generating a first control signal based on the frequency of an input radio frequency signal and generating a second control signal based on a target phase shifting angle; the output end of the orthogonal signal generator is connected with the second input end of the differential adder, and the orthogonal signal generator is used for generating an orthogonal signal with corresponding frequency based on the first control signal; the output end of the differential adder is connected with the input end of the amplifying circuit, and the differential adder is used for carrying out vector synthesis on the orthogonal signals based on the second control signal and outputting first in-phase orthogonal signals; and the amplifying circuit is used for carrying out power amplification on the first in-phase orthogonal signal and outputting a second in-phase orthogonal signal.)

1. A multiphase phase shifter, comprising: the device comprises an orthogonal signal generator, a differential adder, a controller and an amplifying circuit;

the output end of the controller is respectively connected with the input end of the orthogonal signal generator and the first input end of the differential adder, and the controller is used for generating a first control signal based on the frequency of an input radio frequency signal and generating a second control signal based on a target phase shifting angle; the first control signal is used for controlling the orthogonal signal generator; the second control signal is used for controlling the differential adder;

the output end of the orthogonal signal generator is connected with the second input end of the differential adder, and the orthogonal signal generator is used for generating an orthogonal signal with a corresponding frequency based on the first control signal;

the output end of the differential adder is connected with the input end of the amplifying circuit, and the differential adder is used for carrying out vector synthesis on the orthogonal signals based on the second control signal and outputting first in-phase orthogonal signals;

the amplifying circuit is used for carrying out power amplification on the first in-phase orthogonal signal and outputting a second in-phase orthogonal signal.

2. The multiphase phase shifter of claim 1,

the quadrature signal generator comprises a first-stage phase shift circuit and a second-stage phase shift circuit;

the first control signal comprises a first class sub-control signal used for controlling the first-stage phase shift circuit and a second class sub-control signal used for controlling the second-stage phase shift circuit;

the output end of the first-stage phase shift circuit is connected with the input end of the second-stage phase shift circuit, and the first-stage phase shift circuit is used for responding to the first-class sub control signal to adjust the circuit impedance of the first-stage phase shift circuit to generate a differential signal of a first phase shift angle;

and the second-stage phase shift circuit is used for responding to the second-class sub control signal to adjust the circuit impedance of the second-stage phase shift circuit and outputting the orthogonal signal with the corresponding frequency.

3. The multiphase phase shifter of claim 2, wherein the impedance-adjusted second stage phase shift circuit is configured to shift the input differential signal with the first phase shift angle by a second phase shift angle, and output the quadrature signal with the corresponding frequency; the sum of the second phase-shifted angle and the first phase-shifted angle equals 90 degrees.

4. The multi-phase shifter of claim 2, wherein the first stage phase shifting circuit comprises a first resistive sub-circuit and a first capacitive sub-circuit; the second-stage phase shift circuit comprises a second resistance sub-circuit and a second capacitance sub-circuit;

correspondingly, the first-class sub-control signal is used for controlling the product of the equivalent capacitance value of the first capacitor sub-circuit and the equivalent resistance value of the first resistor sub-circuit; the second-class sub-control signal is used for controlling the product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit;

the first-stage phase shift circuit is used for responding to the first-class sub control signal to enable the product of the equivalent capacitance value of the first capacitor sub circuit and the equivalent resistance value of the first resistor sub circuit to be a first delay constant, and generating a differential signal of the first phase shift angle;

the second-stage phase shift circuit is used for responding to the second type of sub-control signals to enable the product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit to be a second delay constant, and outputting the orthogonal signals with corresponding frequencies; wherein the first delay constant and the second delay constant are both determined according to the frequency of the input radio frequency signal.

5. The multiphase phase shifter of claim 4, wherein the first stage phase shifting circuit is configured to adjust the equivalent capacitance value of the first capacitor sub-circuit or the equivalent resistance value of the first resistor sub-circuit in response to the first class control signal, such that a product of the equivalent capacitance value of the first capacitor sub-circuit and the equivalent resistance value of the first resistor sub-circuit is the first delay constant, and generate the differential signal of the first phase shifting angle;

the second-stage phase shift circuit is configured to adjust an equivalent capacitance value of the second capacitor sub-circuit or an equivalent resistance value of the second resistor sub-circuit in response to the second type of sub-control signal, so that a product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit is the second delay constant, and output the quadrature signal with the corresponding frequency.

6. The multi-phase shifter of claim 4, wherein the first resistive sub-circuit or the first capacitive sub-circuit comprises a first impedance adjustment circuit; the second resistive sub-circuit or the second capacitive sub-circuit comprises a second impedance adjustment circuit;

correspondingly, the first-class sub-control signal is used for controlling the first impedance adjusting circuit to be switched on or switched off; the second-class sub-control signal is used for controlling the second impedance adjusting circuit to be switched on or switched off;

the first-stage phase shift circuit is configured to switch on or switch off the first impedance adjusting circuit in response to the first class of sub-control signals, and change an equivalent capacitance value of the first capacitor sub-circuit or an equivalent resistance value of the first resistor sub-circuit, so that a product of the equivalent capacitance value of the first capacitor sub-circuit and the equivalent resistance value of the first resistor sub-circuit is the first delay constant, and a differential signal of the first phase shift angle is generated;

the second-stage phase shift circuit is configured to switch on or switch off the second impedance adjusting circuit in response to the second type of sub-control signal, change an equivalent capacitance value of the second capacitor sub-circuit or an equivalent resistance value of the second resistor sub-circuit, make a product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit be the second delay constant, and output the quadrature signal with a corresponding frequency.

7. A multiphase phase shifting method applied to the multiphase phase shifter of any one of claims 1 to 6, the method comprising:

the controller generates a first control signal based on the frequency of the input radio frequency signal and generates a second control signal based on the target phase shifting angle; the first control signal is used for controlling the orthogonal signal generator; the second control signal is used for controlling the differential adder;

the quadrature signal generator generates a quadrature signal of a corresponding frequency based on the first control signal;

the differential adder performs vector synthesis on the orthogonal signals based on the second control signal and outputs first in-phase orthogonal signals;

the amplifying circuit is used for carrying out power amplification on the first in-phase orthogonal signal and outputting a second in-phase orthogonal signal.

8. The method of claim 7,

the quadrature signal generator comprises a first-stage phase shift circuit and a second-stage phase shift circuit;

the first control signal comprises a first class sub-control signal used for controlling the first-stage phase shift circuit and a second class sub-control signal used for controlling the second-stage phase shift circuit;

the quadrature signal generator generates a quadrature signal of a corresponding frequency based on the first control signal, including:

the first-stage phase shift circuit responds to the first-class sub control signal to adjust the circuit impedance of the first-stage phase shift circuit, and generates a differential signal of a first phase shift angle;

and the second-stage phase shift circuit responds to the second-class sub control signal to adjust the circuit impedance of the second-stage phase shift circuit and outputs the orthogonal signal with the corresponding frequency.

9. A multi-phase shifting method applied to a controller in the multi-phase shifter of any one of claims 1 to 6, the method comprising:

acquiring the frequency of an input radio frequency signal in real time;

generating a first control signal based on a frequency of the input radio frequency signal; the first control signal is used for controlling the orthogonal signal generator;

acquiring a preset phase shift angle;

generating a second control signal based on a preset phase shift angle; the second control signal is used for controlling the amplifying circuit;

controlling the quadrature signal generator based on the first control signal such that the quadrature signal generator generates a quadrature signal of a corresponding frequency;

and controlling a differential adder to perform vector synthesis on the orthogonal signals based on the second control signal, so that the differential adder outputs a first in-phase orthogonal signal.

10. The method of claim 9, wherein the quadrature signal generator comprises a first stage phase shift circuit and a second stage phase shift circuit;

the first control signal comprises a first class sub-control signal used for controlling the first-stage phase shift circuit and a second class sub-control signal used for controlling the second-stage phase shift circuit; the generating a first control signal based on the frequency of the input radio frequency signal comprises:

determining a first product as a product of the frequency of the input radio frequency signal and the phase shift angle of the first stage phase shift circuit;

determining a first delay constant for the first stage phase shift circuit based on the first product;

generating the first class of sub-control signals based on the first delay constant;

determining a second product as a product of the frequency of the input radio frequency signal and the phase shift angle of the second stage phase shift circuit;

determining a second delay constant for the second stage phase shift circuit based on the second product;

generating the second class of sub-control signals based on the second delay constant;

correspondingly, the controlling the orthogonal signal generator based on the first control signal so that the orthogonal signal generator generates an orthogonal signal of a corresponding frequency includes:

controlling the first-stage phase shift circuit based on the first-class sub-control signal so that the first-stage phase shift circuit outputs a differential signal of a first phase shift angle;

and controlling the second-stage phase shift circuit based on the second-class sub control signals, so that the second-stage phase shift circuit outputs quadrature signals with corresponding frequencies.

Technical Field

The present application relates to phase shifter technology, and more particularly, to a multiphase phase shifter and a multiphase phase shifting method.

Background

In the related art, since the bandwidth of the quadrature signal generator in the phase shifter is not wide enough, the quadrature signal cannot be generated at a wide bandwidth, thereby limiting the bandwidth of the entire phase shifter.

Disclosure of Invention

Embodiments of the present application are intended to provide a multi-phase shifter and a multi-phase shifting method.

In a first aspect, an embodiment of the present application provides a multiphase phase shifter, including: the device comprises an orthogonal signal generator, a differential adder, a controller and an amplifying circuit;

the output end of the controller is respectively connected with the first input end of the orthogonal signal generator and the first input end of the differential adder, and the controller is used for generating a first control signal based on the frequency of an input radio frequency signal and generating a second control signal based on a target phase shifting angle; the first control signal is used for controlling the orthogonal signal generator; the second control signal is used for controlling the differential adder;

the output end of the orthogonal signal generator is connected with the second input end of the differential adder, and the orthogonal signal generator is used for generating an orthogonal signal with a corresponding frequency based on the first control signal;

the output end of the differential adder is connected with the input end of the amplifying circuit, and the differential adder is used for carrying out vector synthesis on the orthogonal signals based on the second control signal and outputting first in-phase orthogonal signals;

the amplifying circuit is used for carrying out power amplification on the first in-phase orthogonal signal and outputting a second in-phase orthogonal signal.

In one embodiment, the quadrature signal generator includes a first stage phase shift circuit and a second stage phase shift circuit;

the first control signal comprises a first class sub-control signal used for controlling the first-stage phase shift circuit and a second class sub-control signal used for controlling the second-stage phase shift circuit;

the output end of the first-stage phase shift circuit is connected with the input end of the second-stage phase shift circuit, and the first-stage phase shift circuit is used for responding to the first-class sub control signal to adjust the circuit impedance of the first-stage phase shift circuit to generate a differential signal of a first phase shift angle;

and the second-stage phase shift circuit is used for responding to the second-class sub control signal to adjust the circuit impedance of the second-stage phase shift circuit and outputting the orthogonal signal with the corresponding frequency.

In one embodiment, the impedance-adjusted second-stage phase shift circuit is configured to shift the input differential signal with the first phase-shift angle by a second phase-shift angle, and output the quadrature signal with the corresponding frequency; the sum of the second phase-shifted angle and the first phase-shifted angle equals 90 degrees.

In one embodiment, the first stage phase shifting circuit includes a first resistive sub-circuit and a first capacitive sub-circuit; the second-stage phase shift circuit comprises a second resistance sub-circuit and a second capacitance sub-circuit;

correspondingly, the first-class sub-control signal is used for controlling the product of the equivalent capacitance value of the first capacitor sub-circuit and the equivalent resistance value of the first resistor sub-circuit; the second-class sub-control signal is used for controlling the product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit;

the first-stage phase shift circuit is used for responding to the first-class sub control signal to enable the product of the equivalent capacitance value of the first capacitor sub circuit and the equivalent resistance value of the first resistor sub circuit to be a first delay constant, and generating a differential signal of the first phase shift angle;

the second-stage phase shift circuit is used for responding to the second type of sub-control signals to enable the product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit to be a second delay constant, and outputting the orthogonal signals with corresponding frequencies; wherein the content of the first and second substances,

the first delay constant and the second delay constant are both determined according to the frequency of the input radio frequency signal.

In one embodiment, the first stage phase shift circuit is configured to adjust an equivalent capacitance value of the first capacitor sub-circuit or an equivalent resistance value of the first resistor sub-circuit in response to the first class of sub-control signals, so that a product of the equivalent capacitance value of the first capacitor sub-circuit and the equivalent resistance value of the first resistor sub-circuit is the first delay constant, and generate the differential signal of the first phase shift angle;

the second-stage phase shift circuit is configured to adjust an equivalent capacitance value of the second capacitor sub-circuit or an equivalent resistance value of the second resistor sub-circuit in response to the second type of sub-control signal, so that a product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit is the second delay constant, and output the quadrature signal with the corresponding frequency.

In one embodiment, the first resistive sub-circuit or the first capacitive sub-circuit comprises a first impedance adjustment circuit; the second resistive sub-circuit or the second capacitive sub-circuit comprises a second impedance adjustment circuit;

correspondingly, the first-class sub-control signal is used for controlling the first impedance adjusting circuit to be switched on or switched off; the second-class sub-control signal is used for controlling the second impedance adjusting circuit to be switched on or switched off;

the first-stage phase shift circuit is configured to switch on or switch off the first impedance adjusting circuit in response to the first class of sub-control signals, and change an equivalent capacitance value of the first capacitor sub-circuit or an equivalent resistance value of the first resistor sub-circuit, so that a product of the equivalent capacitance value of the first capacitor sub-circuit and the equivalent resistance value of the first resistor sub-circuit is the first delay constant, and a differential signal of the first phase shift angle is generated;

the second-stage phase shift circuit is configured to switch on or switch off the second impedance adjusting circuit in response to the second type of sub-control signal, change an equivalent capacitance value of the second capacitor sub-circuit or an equivalent resistance value of the second resistor sub-circuit, make a product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit be the second delay constant, and output the quadrature signal with a corresponding frequency.

In a second aspect, an embodiment of the present application provides a multiphase phase shifting method, which is applied to the above-mentioned multiphase phase shifter, and the method includes:

the controller generates a first control signal based on the frequency of the input radio frequency signal and generates a second control signal based on the target phase shifting angle; the first control signal is used for controlling the orthogonal signal generator; the second control signal is used for controlling the differential adder;

the quadrature signal generator generates a quadrature signal of a corresponding frequency based on the first control signal;

the differential adder performs vector synthesis on the orthogonal signals based on the second control signal and outputs first in-phase orthogonal signals;

the amplifying circuit is used for carrying out power amplification on the first in-phase orthogonal signal and outputting a second in-phase orthogonal signal.

In one embodiment, the quadrature signal generator includes a first stage phase shift circuit and a second stage phase shift circuit;

the first control signal comprises a first class sub-control signal used for controlling the first-stage phase shift circuit and a second class sub-control signal used for controlling the second-stage phase shift circuit;

the quadrature signal generator generates a quadrature signal of a corresponding frequency based on the first control signal, including:

the first-stage phase shift circuit responds to the first-class sub control signal to adjust the circuit impedance of the first-stage phase shift circuit, and generates a differential signal of a first phase shift angle;

and the second-stage phase shift circuit responds to the second-class sub control signal to adjust the circuit impedance of the second-stage phase shift circuit and outputs the orthogonal signal with the corresponding frequency.

In a third aspect, an embodiment of the present application provides another multiphase phase shifting method, which is applied to the controller in the multiphase phase shifter, where the method includes:

acquiring the frequency of an input radio frequency signal in real time;

generating a first control signal based on a frequency of the input radio frequency signal; the first control signal is used for controlling the orthogonal signal generator;

acquiring a preset phase shift angle;

generating a second control signal based on a preset phase shift angle; the second control signal is used for controlling the amplifying circuit;

controlling the quadrature signal generator based on the first control signal such that the quadrature signal generator generates a quadrature signal of a corresponding frequency;

and controlling a differential adder to perform vector synthesis on the orthogonal signals based on the second control signal, so that the differential adder outputs a first in-phase orthogonal signal.

In one embodiment, the quadrature signal generator includes a first stage phase shift circuit and a second stage phase shift circuit;

the first control signal comprises a first class sub-control signal used for controlling the first-stage phase shift circuit and a second class sub-control signal used for controlling the second-stage phase shift circuit; the generating a first control signal based on the frequency of the input radio frequency signal comprises:

determining a first product as a product of the frequency of the input radio frequency signal and the phase shift angle of the first stage phase shift circuit;

determining a first delay constant for the first stage phase shift circuit based on the first product;

generating the first class of sub-control signals based on the first delay constant;

determining a second product as a product of the frequency of the input radio frequency signal and the phase shift angle of the second stage phase shift circuit;

determining a second delay constant for the second stage phase shift circuit based on the second product;

generating the second class of sub-control signals based on the second delay constant.

In this embodiment, since the controller of the phase shifter is the first control signal generated based on the frequency of the input radio frequency signal, the controller may generate different first control signals for different frequencies of the input radio frequency signal, so that the quadrature signal generator can generate quadrature signals of corresponding frequencies based on the different first control signals; instead of generating the same first control signal for different frequencies of the input radio frequency signal, thus increasing the bandwidth of the quadrature signal generator and thus the bandwidth of the entire phase shifter.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

Fig. 1 is a block circuit diagram of an active phase shifter in the related art;

fig. 2 is a schematic structural diagram of a multiphase phase shifter according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of another multiphase phase shifter according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of another multiphase phase shifter according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a multiphase phase shifter according to an embodiment of the present disclosure;

fig. 6 is a schematic flow chart of an implementation of a multiphase phase shifting method according to an embodiment of the present application;

FIG. 7 is a schematic flow chart of another implementation of a multiphase phase shift method according to an embodiment of the present disclosure;

FIG. 8 is a schematic flow chart of another implementation of a multiphase phase shifting method according to an embodiment of the present application;

FIG. 9 is a schematic flow chart of another implementation of a multiphase phase shift method according to an embodiment of the present application;

fig. 10 is a circuit diagram of an active phase shifter according to an embodiment of the present disclosure.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the examples provided herein are merely illustrative of the present application and are not intended to limit the present application. In addition, the following examples are provided as partial examples for implementing the present application, not all examples for implementing the present application, and the technical solutions described in the examples of the present application may be implemented in any combination without conflict.

It should be noted that in the embodiments of the present application, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that a method or apparatus including a series of elements includes not only the explicitly recited elements but also other elements not explicitly listed or inherent to the method or apparatus. Without further limitation, the use of the phrase "including a. -. said." does not exclude the presence of other elements (e.g., steps in a method or elements in a device, such as portions of circuitry, processors, programs, software, etc.) in the method or device in which the element is included.

The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, e.g., U and/or W, which may mean: u exists alone, U and W exist simultaneously, and W exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, including at least one of U, W, V, and may mean including any one or more elements selected from the group consisting of U, W and V.

The phase shifter is a device for generating multi-phase signals, and is widely applied to radio frequency systems. The phase shifters are mainly classified into active phase shifters and passive phase shifters. Wherein, the active phase shifter is characterized in that: the area is small, the flexibility is controllable, the gain can be generated, but the linearity is limited. The passive phase shifter is characterized in that: stable phase, high linearity, large area and loss.

Fig. 1 is a circuit diagram of an active Phase shifter in the related art, and as shown in fig. 1, an active Filter includes an Inter-stage Matching Network (IMN) 101, a quadrature generator (Poly Phase Filter, PPF) 102, an analog adder 103, a transformer TF 1104, a first capacitor C1, an amplifier 105, a second capacitor C2, a transformer TF 2106, and a third capacitor C3, which are connected in sequence, wherein a constant amplitude differential rf signal is input to an input terminal of the IMN 101, the IMN 101 performs Network Matching on the input constant amplitude differential rf signal, and inputs the Network-matched constant amplitude differential rf signal to the PPF 102, four quadrature signals (two positive output terminals I +, Q + and two negative output terminals I-, Q-) having the same amplitude and 90 degrees Phase intervals are generated by the PPF 102, and the four quadrature signals (two positive output terminals I +, Q + and two negative output terminals I-, Q-) having the same amplitude and 90 degrees Phase intervals are input to the analog adder 103, the analog adder 103 responds to an external control signal to perform vector synthesis on four orthogonal signals with the same amplitude and 90-degree phase distance, outputs an equal-phase-shift radio frequency signal to the TF 1104, performs isolation and first power conversion through the TF 1104, and outputs a first power signal to the amplifier 105; the second power conversion is carried out by the amplifier 105, a second power signal is output to the TF 2106, the TF 2106 carries out isolation and third power conversion on the second power signal, and the converted equal phase shift radio frequency signal is output.

Meanwhile, C1 is cross-coupled between two input terminals of the amplifier 105 for removing electromagnetic interference; the C2 and the C3 are respectively connected between two input ends and two output ends of the TF 2106 for electromagnetic interference generated by the TF 2106.

Here, the IMN 101 includes a first inductor L1 and a second inductor L2, L1 and L2 being connected in series to the first input terminal and the second input terminal of the PPF 102, respectively; PPF 102 is a two-order RC filter; the analog adder 103 includes a quadrature path selection unit 1031, a Variable Gain Amplifier (VGA) 1032, and an adder 1033, which are connected in this order.

It is understood that the two-stage RC filter comprises eight resistors R1 to R8 and eight capacitors C4 to C11, wherein a series branch formed by connecting R1 and R2 in series is connected between the first input terminal and the first output terminal (1 +) of the two-stage RC filter; a series branch formed by connecting R3 and R4 in series is connected between the first input end and the second output end (Q +) of the two-stage RC filter; the series branch formed by the series connection of R5 and R6 is connected between (1-) the second input end and the third output end of the two-stage RC filter; the series branch formed by the series connection of R7 and R8 is connected between the second input end and the fourth output end (Q-) of the two-stage RC filter; the C4 is connected across the R3, and the positive pole of the C4 is connected to the first input terminal; the cathode of the C5 is connected to the second output end, and the anode of the C5 is connected to the common node of R1 and R2; the anode of the C6 is connected to the first input terminal, and the cathode of the C6 is connected to the common node of R5 and R6; the cathode of the C7 is connected to the third output terminal, and the anode of the C7 is connected to the common node of R3 and R4; the C8 is connected across the R7, and the positive pole of the C8 is connected to the second input end; the cathode of the C9 is connected to the fourth output terminal, and the anode of the C9 is connected to the common node of R5 and R6; the anode of the C10 is connected to the second input terminal, and the cathode of the C10 is connected to the common node of R1 and R2; the cathode of the C11 is connected to the first output terminal, and the anode of the C11 is connected to the common node of R7 and R8.

In the related art, since the differential adder of the multi-phase shifter has different gains for different phase-shifting phases, the gain of the amplifying circuit needs to be controlled when the power amplification is performed through the amplifying circuit at the later stage. The insertion phase of the amplifier circuit at different gains (relative phase shift through the amplifier at a given frequency) varies with the gain of the amplifier circuit, and can significantly affect the phase shift accuracy.

Based on the above technical problem, an embodiment of the present application provides a multi-phase shifter, as shown in fig. 2, the multi-phase shifter includes: a quadrature signal generator 201, a differential adder 202, a controller 203, and an amplification circuit 204;

the output end of the controller 203 is connected to the input end of the quadrature signal generator 201 and the first input end of the differential adder 202, respectively, and the controller 203 is configured to generate a first control signal based on the frequency of an input radio frequency signal and a second control signal based on a target phase shift angle; the first control signal is used for controlling the quadrature signal generator 201; the second control signal is used for controlling the differential adder 202;

an output end of the quadrature signal generator 201 is connected to a second input end of the differential adder 202, and the quadrature signal generator 201 is configured to generate a quadrature signal of a corresponding frequency based on the first control signal;

the output end of the differential adder 202 is connected to the input end of the amplifying circuit 204, and the differential adder 202 is configured to perform vector synthesis on the orthogonal signals based on the second control signal and output a first in-phase orthogonal signal;

the amplifying circuit 204 is configured to perform power amplification on the first in-phase quadrature signal, and output a second in-phase quadrature signal.

In some possible embodiments, the quadrature signal generated by the quadrature signal generator 201 may be four quadrature signals (two positive outputs I +, Q + and two negative outputs I-, Q-) with the same amplitude and with 90 degrees phase spacing; the quadrature signal generator 201 may be any generator capable of generating four quadrature signals (two positive outputs I +, Q + and two negative outputs I-, Q-) of equal amplitude and 90 degrees phase spacing. For example, the quadrature signal generator 201 may be a two-order RC filter.

In one possible embodiment, the controller 203 may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), an FPGA, a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor. The controller 203 may generate a first control signal to control the differential adder 202 and a second control signal to control the amplification circuit 204 corresponding to a preset phase shift angle. The preset phase shift angle may be determined according to an application scenario of the phase shifter. For example, in some application scenarios, the phase shifter is required to shift 30 ° (degrees), and the corresponding preset phase shift angle is 30 °.

It is understood that the quadrature signal generator 201 and the differential adder 202 may each include a switch tube. Correspondingly, the first control signal and the second control signal may both be switching signals for turning on or off the switching tube. For example, the first control signal and the second control signal may be a voltage control signal of +12V (volts) or a voltage control signal of 0V each.

In the embodiment of the application, since the controller of the phase shifter is the first control signal generated based on the frequency of the input radio frequency signal, the controller may generate different first control signals for different frequencies of the input radio frequency signal, so that the quadrature signal generator can generate quadrature signals of corresponding frequencies based on the different first control signals; instead of generating the same first control signal for different frequencies of the input radio frequency signal, thus increasing the bandwidth of the quadrature signal generator and thus the bandwidth of the entire phase shifter.

The present embodiment provides another multi-phase shifter, as shown in fig. 3, the multi-phase shifter may include: a first-stage phase shift circuit 301, a second-stage phase shift circuit 302, a differential adder 303, a controller 304, and an amplification circuit 305;

an output end of the controller 304 is connected to an input end of the first-stage phase shift circuit 301, a first input end of the second-stage phase shift circuit 302, and a first input end of the differential adder 303, respectively, and the controller 304 is configured to generate a first-type sub-control signal for controlling the first-stage phase shift circuit 301 and a second-type sub-control signal for controlling the second-stage phase shift circuit 302 based on a frequency of an input radio frequency signal, and generate a second control signal based on a target phase shift angle; the second control signal is used for controlling the differential adder 303;

the output end of the first-stage phase shift circuit 301 is connected to the second input end of the second-stage phase shift circuit 302, and the first-stage phase shift circuit 301 is configured to adjust its own circuit impedance in response to the first-class sub-control signal to generate a differential signal at a first phase shift angle;

the output terminal of the second stage phase shift circuit 302 is connected to the differential adder 303, and is used for adjusting its own circuit impedance in response to the second type sub-control signal and outputting the quadrature signal with corresponding frequency

The output end of the differential adder 303 is connected to the input end of the amplifying circuit 305, and the differential adder 303 is configured to perform vector synthesis on the orthogonal signals based on the second control signal and output a first in-phase orthogonal signal;

the amplifying circuit 305 is configured to perform power amplification on the first in-phase quadrature signal, and output a second in-phase quadrature signal.

It will be appreciated that the quadrature signal generator is typically implemented using at least two stages of phase shifting circuits. Wherein, the phase shift angle of the phase shift circuit of each stage is less than 90 degrees, and the sum of the phase shift angles of each stage is 90 degrees.

In a possible implementation manner, the first-class sub-control signal may be a switching signal that is determined and generated according to the frequency of the input radio frequency signal and the phase shift angle of the first-stage phase shift circuit, and is used to adjust the circuit impedance of the first-stage phase shift circuit by controlling the switching tube in the first-stage phase shift circuit to be turned on or off, so that the first-stage phase shift circuit also outputs the same delay phase (phase shift angle) under the input radio frequency signals of different frequencies, that is, a differential signal of the first phase shift angle with a constant angle is generated. The phase shift angle calculation of the first stage phase shift circuit is shown in formula (1):

θ1=1/（f * R1*C1） （1）；

wherein, θ 1 represents the phase shift angle of the first stage phase shift circuit, f represents the frequency of the input radio frequency signal, and R1 × C1 represents the delay constant of the first stage phase shift circuit; r1 represents the equivalent resistance across the first stage of phase shift circuit between the input and the corresponding output of the first stage of phase shift circuit; c1 represents the equivalent capacitance in the first stage of phase shift circuit across the input and adjacent output of the first stage of phase shift circuit.

As can be seen from equation (1), when θ 1 is constant, R1 × C1 needs to be adjusted to change according to the change of f.

It is understood that the circuit impedance of the phase shift circuit of the first stage or the phase shift circuit of the second stage may be R1 or R2.

In a possible implementation manner, the second-class sub-control signal may be a switching signal that is determined and generated according to the frequency of the input radio frequency signal and the phase shift angle of the second-stage phase shift circuit, and is used to adjust the circuit impedance of the second-stage phase shift circuit by controlling the switching tube in the second-stage phase shift circuit to be turned on or off, so that the second-stage phase shift circuit also outputs the same delay phase under the input radio frequency signals of different frequencies, that is, an orthogonal signal with a constant angle is generated.

The phase shift angle calculation of the phase shift circuit of the second stage is shown in formula (2):

θ2=1/（f * R2*C2） （2）；

wherein θ 2 represents the phase shift angle of the second stage phase shift circuit, f represents the frequency of the input radio frequency signal, and R2 × C2 represents the delay constant of the second stage phase shift circuit; r2 represents the equivalent resistance across the second stage phase shift circuit between the input and the corresponding output of the second stage phase shift circuit; c2 represents the equivalent capacitance in the second stage of phase shift circuit across the input and adjacent output of the second stage of phase shift circuit.

As can be seen from equation (2), in the case where θ 2 is constant, R2 × C2 needs to be adjusted to change according to the change of f.

In a possible implementation manner, the impedance-adjusted second-stage phase shift circuit may be configured to shift the input differential signal with the first phase-shift angle by a second phase-shift angle, and output the quadrature signal with the corresponding frequency; the sum of the second phase-shifted angle and the first phase-shifted angle equals 90 degrees.

In the embodiment of the application, a first-stage phase shift circuit of the orthogonal signal generator responds to the first-class sub control signal to adjust the circuit impedance of the first-stage phase shift circuit, and generates a differential signal of a first phase shift angle; the second-stage phase shift circuit responds to the second-class sub control signal to adjust the circuit impedance of the second-stage phase shift circuit and outputs the orthogonal signal with the corresponding frequency. Thus, obtaining quadrature signals through a two-stage phase shift circuit facilitates an increase in the bandwidth of the phase shifter.

Fig. 4 is a schematic structural diagram of another multiphase phase shifter according to an embodiment of the present application, and as shown in fig. 4, the multiphase phase shifter includes: a first-stage phase shift circuit 401, a second-stage phase shift circuit 402, a differential adder 403, a controller 404, and an amplification circuit 405; the first stage phase shift circuit 401 comprises a first resistance sub-circuit 4011 and a first capacitance sub-circuit 4012; the second stage phase shift circuit 402 comprises a second resistive subcircuit 4021 and a second capacitive subcircuit 4022;

the output end of the controller 404 is connected to the input end of the first-stage phase shift circuit 401, the first input end of the second-stage phase shift circuit 402, and the first input end of the differential adder 403, the controller 404 is configured to generate a first sub-control signal for controlling a product of an equivalent capacitance value of the first capacitor sub-circuit 4012 and an equivalent resistance value of the first resistor sub-circuit 4011 and a second sub-control signal for controlling a product of an equivalent capacitance value of the second capacitor sub-circuit 4022 and an equivalent resistance value of the second resistor sub-circuit 4021 based on the frequency of an input radio frequency signal, and generate a second control signal based on a target phase shift angle; the second control signal is used for controlling the differential adder 403;

the output end of the first-stage phase shift circuit 401 is connected to the second input end of the second-stage phase shift circuit 402, and the first-stage phase shift circuit 401 is configured to respond to the first class of sub-control signals so that a product of an equivalent capacitance value of the first capacitor sub-circuit 4012 and an equivalent resistance value of the first resistor sub-circuit 4011 is a first delay constant, and generate a differential signal of the first phase shift angle;

the output end of the second-stage phase shift circuit 402 is connected to the differential adder 403, and is configured to respond to the second type of sub-control signal to make a product of an equivalent capacitance value of the second capacitor sub-circuit 4022 and an equivalent resistance value of the second resistor sub-circuit 4021 be a second delay constant, and output the quadrature signal with a corresponding frequency; wherein the first delay constant and the second delay constant are both determined according to the frequency of the input radio frequency signal;

an output end of the differential adder 403 is connected to an input end of the amplifying circuit 405, and the differential adder 403 is configured to perform vector synthesis on the orthogonal signals based on the second control signal and output a first in-phase orthogonal signal;

the amplifying circuit 405 is configured to perform power amplification on the first in-phase quadrature signal, and output a second in-phase quadrature signal.

Here, the first resistance sub-circuit means a circuit including a first resistance and other circuits for performing impedance adjustment; the first capacitance sub-circuit is used for representing other circuits comprising a first capacitor and used for capacitance value adjustment; the second resistance sub-circuit is representative of other circuits including a second resistance and for making impedance adjustments; the second capacitance sub-circuit is meant to include a second capacitance and other circuitry for capacitance adjustment.

It will be appreciated that the equivalent resistance value of the first resistance sub-circuit and the equivalent capacitance value of the first capacitance sub-circuit may be R1 and C1 in equation (1), respectively; the equivalent resistance value of the second resistance sub-circuit and the equivalent capacitance value of the second capacitance sub-circuit may be R2 and C2 in equation (2), respectively.

In some possible embodiments, the product of the equivalent capacitance value of the first capacitor sub-circuit 4012 and the equivalent resistance value of the first resistor sub-circuit 4011 is the delay constant R1 × C1 of the first stage phase shift circuit in formula (1); the product of the equivalent capacitance value of the second capacitive subcircuit 4022 and the equivalent resistance value of the second resistive subcircuit 4021 may be a delay constant R2 × C2 of the second stage phase shift circuit in equation (2).

It can be understood that, under the condition that the phase shift angle of the first stage phase shift circuit is not changed, the product of the equivalent capacitance value of the first capacitance sub-circuit 4012 and the equivalent resistance value of the first resistance sub-circuit 4011 is inversely proportional to the phase shift angle of the first stage phase shift circuit; under the condition that the phase shift angle of the second-stage phase shift circuit is not changed, the product of the equivalent capacitance value of the second capacitive sub-circuit 4022 and the equivalent resistance value of the second resistive sub-circuit 4021 is inversely proportional to the phase shift angle of the second-stage phase shift circuit.

It can be understood that the first delay constant represents the product of R1 and C1 corresponding to the frequency of the input rf signal in formula (1) under the condition that the phase shift angle of the first stage phase shift circuit is unchanged; the second delay constant represents the product of R2 and C2 corresponding to the frequency of the input rf signal in equation (2) under the condition that the phase shift angle of the phase shift circuit in the second stage is unchanged.

In the embodiment of the application, a product of an equivalent capacitance value of a first capacitor sub-circuit and an equivalent resistance value of a first resistor sub-circuit in a first-stage phase shift circuit is adjusted to be a first delay constant based on a first-class sub-control signal generated according to the frequency of an input radio frequency signal, and a product of an equivalent capacitance value of a second capacitor sub-circuit and an equivalent resistance value of a second resistor sub-circuit in a second-stage phase shift circuit is adjusted to be a second delay constant based on a second-class sub-control signal generated according to the frequency of the input radio frequency signal, so that an orthogonal signal generator generates an orthogonal signal with corresponding frequency, and bandwidth requirements are met.

In a possible implementation manner, the first stage phase shift circuit is configured to adjust an equivalent capacitance value of the first capacitor sub-circuit or an equivalent resistance value of the first resistor sub-circuit in response to the first type of sub-control signal, so that a product of the equivalent capacitance value of the first capacitor sub-circuit and the equivalent resistance value of the first resistor sub-circuit is the first delay constant, and generate the differential signal of the first phase shift angle;

the second-stage phase shift circuit is configured to adjust an equivalent capacitance value of the second capacitor sub-circuit or an equivalent resistance value of the second resistor sub-circuit in response to the second type of sub-control signal, so that a product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit is the second delay constant, and output the quadrature signal with the corresponding frequency.

Fig. 5 is a schematic structural diagram of a further multiphase phase shifter provided in an embodiment of the present application, and as shown in fig. 5, the multiphase phase shifter includes: a first-stage phase shift circuit 501, a second-stage phase shift circuit 502, a differential adder 503, a controller 504 and an amplifying circuit 505; the first stage phase shift circuit 501 comprises a first resistor sub-circuit 5011 and a first capacitor sub-circuit 5012; the first resistor subcircuit 5011 or the first capacitor subcircuit 5012 includes a first impedance adjustment circuit 5013; the second stage phase shift circuit 502 comprises a second resistor subcircuit 5021 and a second capacitor subcircuit 5022; the second resistive subcircuit 5021 or the second capacitive subcircuit 5022 comprises a second impedance adjusting circuit 5023;

the output end of the controller 504 is connected to the input end of the first-stage phase shift circuit 501, the first input end of the second-stage phase shift circuit 502, and the first input end of the differential adder 503, respectively, the controller 504 is configured to generate a first type sub-control signal for controlling the first impedance adjusting circuit to be turned on or off and a second type sub-control signal for controlling the second impedance adjusting circuit to be turned on or off based on the frequency of an input radio frequency signal, and generate a second control signal based on a target phase shift angle; the second control signal is used to control the differential adder 503;

the output end of the first stage phase shift circuit 501 is connected to the second input end of the second stage phase shift circuit 502, and the first stage phase shift circuit 501 is configured to switch on or off the first impedance adjusting circuit 5013 in response to the first type of sub-control signal, change the equivalent capacitance value of the first capacitor sub-circuit 5012 or the equivalent resistance value of the first resistor sub-circuit 5011, so that the product of the equivalent capacitance value of the first capacitor sub-circuit 5012 and the equivalent resistance value of the first resistor sub-circuit 5011 is the first delay constant, and generate the differential signal of the first phase shift angle;

the output end of the second-stage phase shift circuit 502 is connected to the differential adder 503, and is configured to switch on or switch off the second impedance adjusting circuit 5023 in response to the second type of sub-control signal, change the equivalent capacitance value of the second capacitor sub-circuit 5022 or the equivalent resistance value of the second resistor sub-circuit 5021, so that the product of the equivalent capacitance value of the second capacitor sub-circuit 5022 and the equivalent resistance value of the second resistor sub-circuit 5021 is the second delay constant, and output the quadrature signal with the corresponding frequency; wherein the first delay constant and the second delay constant are both determined according to the frequency of the input radio frequency signal;

the output end of the differential adder 503 is connected to the input end of the amplifying circuit 505, and the differential adder 503 is configured to perform vector synthesis on the orthogonal signals based on the second control signal and output a first in-phase orthogonal signal;

the amplifying circuit 505 is configured to perform power amplification on the first in-phase quadrature signal, and output a second in-phase quadrature signal.

It is understood that the first impedance adjusting circuit 5013 and the second impedance adjusting circuit 5023 may each comprise an adjusting resistor or an adjusting capacitor. In one embodiment, the first impedance adjustment circuit 5013 and the second impedance adjustment circuit 5023 may be circuits comprising adjusting resistors connected in parallel with a first resistor in the first resistive subcircuit 5011 or a second resistor in the second resistive subcircuit 5021; for example, the first impedance adjusting circuit 5013 and the second impedance adjusting circuit 5023 may be a parallel circuit in which at least two adjusting resistors are connected in parallel, or a single adjusting resistor connected in parallel with the first resistor or the second resistor; in another embodiment, the first impedance adjustment circuit 5013 and the second impedance adjustment circuit 5023 may be circuits comprising adjustment capacitors connected in parallel with a first capacitor in the first capacitive subcircuit 5012 or a second capacitor in the second capacitive subcircuit 5022. For example, the first impedance adjusting circuit 5013 and the second impedance adjusting circuit 5023 may each be a parallel circuit formed by connecting at least two adjusting capacitors in parallel, or a single adjusting capacitor connected in parallel with the first capacitor or the second capacitor.

In one embodiment, the first impedance adjusting circuit 5013 and the second impedance adjusting circuit 5023 may each comprise a switching tube in series with an adjusting resistor or an adjusting capacitor.

Here, the switching tube means a semiconductor device that can be used for a switching action. For example, the switch tube may be a Transistor, or may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSET).

In this embodiment, the first stage phase shift circuit switches on or off the first impedance adjusting circuit in response to the first class sub-control signal, so as to change the equivalent capacitance value of the first capacitor sub-circuit or the equivalent resistance value of the first resistor sub-circuit, the product of the equivalent capacitance value of the first capacitor sub-circuit and the equivalent resistance value of the first resistor sub-circuit is made to be the first delay constant, a differential signal of the first phase-shifting angle is generated, the second-stage phase-shifting circuit responds to the second type of sub-control signal to switch on or switch off the second impedance adjusting circuit, the equivalent capacitance value of the second capacitor sub-circuit or the equivalent resistance value of the second resistor sub-circuit is changed, and enabling the product of the equivalent capacitance value of the second capacitor sub-circuit and the equivalent resistance value of the second resistor sub-circuit to be the second delay constant, and outputting the orthogonal signal with the corresponding frequency. Therefore, the phase shift angles of the first-stage phase shift circuit and the second-stage phase shift circuit in the orthogonal signal generator are not changed under different frequencies, and the working bandwidth of the orthogonal signal generator can be widened.

On the basis of the foregoing embodiments, embodiments of the present application provide a multi-phase shifting method, which can be applied to a multi-phase shifter, as shown in fig. 6, and the method includes:

step S601: the controller generates a first control signal based on the frequency of the input radio frequency signal and generates a second control signal based on the target phase shifting angle; the first control signal is used for controlling the orthogonal signal generator; the second control signal is used for controlling the differential adder;

step S602: the quadrature signal generator generates a quadrature signal of a corresponding frequency based on the first control signal;

step S603: the differential adder performs vector synthesis on the orthogonal signals based on the second control signal and outputs first in-phase orthogonal signals;

step S604: the amplifying circuit is used for carrying out power amplification on the first in-phase orthogonal signal and outputting a second in-phase orthogonal signal.

Fig. 7 is a schematic view of an implementation process of another multiphase phase shifting method provided in the embodiment of the present application, and as shown in fig. 7, the process includes:

step S701: the controller generates a first control signal based on the frequency of the input radio frequency signal and generates a second control signal based on the target phase shifting angle; the second control signal is used for controlling the differential adder; the quadrature signal generator comprises a first-stage phase shift circuit and a second-stage phase shift circuit; the first control signal comprises a first class sub-control signal used for controlling the first-stage phase shift circuit and a second class sub-control signal used for controlling the second-stage phase shift circuit;

step S702: the first-stage phase shift circuit responds to the first-class sub control signal to adjust the circuit impedance of the first-stage phase shift circuit, and generates a differential signal of a first phase shift angle;

step S703: the second-stage phase shift circuit responds to the second-class sub control signal to adjust the circuit impedance of the second-stage phase shift circuit and outputs the orthogonal signal with the corresponding frequency;

step S704: the differential adder performs vector synthesis on the orthogonal signals based on the second control signal and outputs first in-phase orthogonal signals;

step S705: the amplifying circuit is used for carrying out power amplification on the first in-phase orthogonal signal and outputting a second in-phase orthogonal signal.

Fig. 8 is a schematic view of an implementation process of another multiphase phase shifting method provided in the embodiment of the present application, and as shown in fig. 8, the process includes:

step S801: acquiring the frequency of an input radio frequency signal in real time;

step S802: generating a first control signal based on a frequency of the input radio frequency signal; the first control signal is used for controlling the orthogonal signal generator;

step S803: acquiring a preset phase shift angle;

step S804: generating a second control signal based on a preset phase shift angle; the second control signal is used for controlling the amplifying circuit;

step S805: controlling the quadrature signal generator based on the first control signal such that the quadrature signal generator generates a quadrature signal of a corresponding frequency;

step S806: and controlling a differential adder to perform vector synthesis on the orthogonal signals based on the second control signal, so that the differential adder outputs a first in-phase orthogonal signal.

Fig. 9 is a schematic flow chart of an implementation of another multi-phase shifting method provided in this embodiment of the present application, and as shown in fig. 9, the flow chart should be applicable to a controller in a multi-phase shifter, and the flow chart includes:

step S901: acquiring the frequency of an input radio frequency signal in real time;

step S902: determining a first product as a product of the frequency of the input radio frequency signal and the phase shift angle of the first stage phase shift circuit;

it can be understood that, according to the formula (1):

θ1*f=1/R1*C1 （3）；

as can be seen from equation (3), in order to ensure that θ 1 is fixed and constant when f varies, the product of θ 1 and f may be obtained first, and then the product of R1 and C1 may be determined according to the product of θ 1 and f, so as to generate the first type sub-control signal correspondingly.

Step S903: determining a first delay constant for the first stage phase shift circuit based on the first product;

step S904: generating the first class of sub-control signals based on the first delay constant;

step S905: determining a second product as a product of the frequency of the input radio frequency signal and the phase shift angle of the second stage phase shift circuit;

it can be understood that, according to the formula (2):

θ2*f=1/R2*C2 （4）；

as can be seen from equation (4), in order to ensure that θ 2 is fixed and constant when f varies, the product of θ 2 and f may be obtained first, and then the product of R2 and C2 may be determined according to the product of θ 2 and f, so as to generate the first type sub-control signal correspondingly.

Step S906: determining a second delay constant for the second stage phase shift circuit based on the second product;

step S907: generating the second class of sub-control signals based on the second delay constant;

step S908: acquiring a preset phase shift angle;

step S909: generating a second control signal based on a preset phase shift angle; the second control signal is used for controlling the amplifying circuit;

step S910: controlling the first-stage phase shift circuit based on the first-class sub-control signal so that the first-stage phase shift circuit outputs a differential signal of a first phase shift angle;

step S911: controlling the second-stage phase shift circuit based on the second-class sub-control signal to enable the second-stage phase shift circuit to output an orthogonal signal with corresponding frequency;

step S912: and controlling a differential adder to perform vector synthesis on the orthogonal signals based on the second control signal, so that the differential adder outputs a first in-phase orthogonal signal.

Fig. 10 is a circuit diagram of an active phase shifter according to an embodiment of the present application, and as shown in fig. 10, the active filter includes an Inter-stage Matching Network (IMN) 1001, a PPF 1002, an analog adder 1003, a transformer TF 31004, a twelfth capacitor C12, a differential amplifier sub-circuit 1005, a thirteenth capacitor C13, a transformer TF 41006, and a fourteenth capacitor C14, which are connected in sequence, where a constant amplitude differential rf signal is input to an input terminal of the IMN 1001, the IMN 1001 performs Network Matching on the input constant amplitude differential rf signal, and inputs the Network matched constant amplitude differential rf signal to the PPF 1002, so as to generate four quadrature signals (two positive output terminals I +, Q + and two negative output terminals I-, Q-) having the same amplitude and a phase interval of 90 °, and inputs the four quadrature signals (two positive output terminals I +, Q +) having the same amplitude and a phase interval of 90 ° into the analog adder 1003 through the PPF 1002, the analog adder 1003 responds to an external control signal to perform vector synthesis on four orthogonal signals with the same amplitude and the phase distance of 90 degrees, outputs a first in-phase orthogonal signal with equal phase shift to the TF 31004, isolates the first in-phase orthogonal signal through the TF 31004, and outputs the isolated first in-phase orthogonal signal to the differential amplification sub-circuit 1005; the power amplification is performed by the differential amplification sub-circuit 1005, the first in-phase orthogonal signal after output isolation and power amplification is isolated by the TF 41006, and the second in-phase orthogonal signal is output.

Meanwhile, C12 is connected across two input terminals of the differential amplification sub-circuit 1005, and is used for removing electromagnetic interference; c13 and C14 are respectively connected across two input terminals and two output terminals of the transformer TF 41006 for removing the electromagnetic interference generated by the transformer TF 41006.

Here, the IMN 1001 includes a third inductor L3 and a fourth inductor L4, L3 and L4 being connected in series to the first input terminal and the second input terminal of the PPF 1002, respectively; PPF 1002 is a two-order RC filter; the analog adder 1003 includes a quadrature path selection unit 1003 ', a Variable Gain Amplifier (VGA) 1003 ″ and an adder 1003' ″, which are connected in this order.

It can be understood that the two-stage RC filter comprises eight resistors R9 to R16 and eight variable-capacitance capacitors C15 to C22, wherein a series branch formed by connecting R9 and R10 in series is connected between the first input end and the first output end (1 +) of the two-stage RC filter; a series branch formed by connecting R11 and R12 in series is connected between the first input end and the second output end (Q +) of the two-stage RC filter; the series branch formed by the series connection of R13 and R14 is connected between (1-) the second input end and the third output end of the two-stage RC filter; the series branch formed by the series connection of R15 and R16 is connected between the second input end and the fourth output end (Q-) of the two-stage RC filter; the C15 is connected across the R11, and the positive pole of the C15 is connected to the first input terminal; the cathode of the C16 is connected to the second output end, and the anode of the C16 is connected to the common node of R9 and R10; the anode of the C17 is connected to the first input terminal, and the cathode of the C17 is connected to the common node of R13 and R14; the cathode of the C18 is connected to the third output terminal, and the anode of the C18 is connected to the common node of R11 and R12; the C19 is connected across the R15, and the positive pole of the C19 is connected to the second input end; the cathode of the C20 is connected to the fourth output terminal, and the anode of the C20 is connected to the common node of R14 and R14; the anode of the C21 is connected to the second input terminal, and the cathode of the C21 is connected to the common node of R9 and R10; the cathode of the C22 is connected to the first output terminal, and the anode of the C22 is connected to the common node of R15 and R16.

The foregoing description of the various embodiments is intended to highlight various differences between the embodiments, and the same or similar parts may be referred to each other, and for brevity, will not be described again herein.

The methods disclosed in the method embodiments provided by the present application can be combined arbitrarily without conflict to obtain new method embodiments.

Features disclosed in various product embodiments provided by the application can be combined arbitrarily to obtain new product embodiments without conflict.

The features disclosed in the various method or phase shifter embodiments provided herein may be combined in any combination to yield new method embodiments or apparatus embodiments without conflict.

While the present embodiments have been described with reference to the accompanying drawings, the present embodiments are not limited to the above-described embodiments, which are merely illustrative and not restrictive, and it will be apparent to those of ordinary skill in the art that many more modifications and variations can be made in the present embodiments without departing from the spirit of the disclosure and the scope of the appended claims.