CN109547382B - Amplitude-phase control circuit and multi-channel amplitude-phase control circuit - Google Patents
Amplitude-phase control circuit and multi-channel amplitude-phase control circuit Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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Abstract
The invention discloses a magnitude-phase control circuit and a multi-channel magnitude-phase control circuit, wherein the magnitude-phase control circuit comprises: the method comprises the steps of calibrating a control module and a magnitude-phase control module; the amplitude and phase control module is used for receiving an input signal; the calibration control module is used for setting a target phase and a target amplitude of the input signal, generating a control signal and sending the control signal to the amplitude-phase control module; and the amplitude-phase control module is also used for adjusting the phase of the input signal to a target phase according to the control signal, and outputting the input signal after the amplitude is adjusted to the target amplitude. The invention can make up the defects of low amplitude and phase control precision and low bandwidth in the prior art, and utilizes a digital quantization mode to control an analog amplitude-phase control module to obtain very good amplitude and phase control precision, wider frequency bandwidth and higher amplitude control dynamic range.
Description
Technical Field
The invention belongs to the field of radio electronic information, and particularly relates to an amplitude-phase control circuit and a multi-channel amplitude-phase control circuit.
Background
The Massive MIMO (multiple input multiple output) simulation technology is one of the key technologies of the 5G network and the communication technology, and can help to realize the simulation of the 5G electromagnetic signal application environment, the research of OTA beam forming algorithm and the development, evaluation and test of the 5G array antenna. And the multichannel high-precision amplitude and phase control circuit is the hardware core of the Massive MIMO technology. However, the current amplitude and phase control circuit and module on the market are generally realized by adopting an MMIC (monolithic microwave integrated circuit) digital phase shifter and a digital attenuator, most of suppliers of the digital phase shifter and the digital attenuator chip provide chips below 6GHz, and only individual manufacturers can provide minimum 0.25dB and 1.4 ° attenuation and phase stepping at present, which means that only +/-0.5 dB and +/-2.8 ° control accuracy can be realized theoretically at most, and the actual product accuracy probably cannot reach the theoretical value. And at millimeter wave frequency band above 6GHz such as 25-40 GHz, the current chip products are fewer, and the broadband products are more difficult to realize. The attenuation and phase stepping of some existing products are higher than 0.5dB and 5.6 degrees, and the actual precision is worse than +/-1 dB and +/-11.2 degrees of theoretical values, so that the requirement of a 5G system on the precision cannot be met at all. Therefore, the high-precision amplitude and phase control circuit is difficult to obtain due to the limitation of the precision level of the broadband device. The research of 5G-related technology is therefore also restricted.
Disclosure of Invention
The invention aims to solve the technical problems of low amplitude and phase control precision and insufficient bandwidth in the prior art, and provides an amplitude-phase control circuit and a multi-channel amplitude-phase control circuit.
The invention solves the technical problems through the following technical scheme:
a magnitude-phase control circuit comprising: the method comprises the steps of calibrating a control module and a magnitude-phase control module;
the amplitude and phase control module is used for receiving an input signal;
the calibration control module is used for setting a target phase and a target amplitude of the input signal, generating a control signal and sending the control signal to the amplitude-phase control module;
and the amplitude-phase control module is also used for adjusting the phase of the input signal to a target phase according to the control signal, and outputting the input signal after the amplitude is adjusted to the target amplitude.
Preferably, the control signal is a digital signal, and the calibration control module is further configured to convert the control signal into an analog signal and send the analog signal to the amplitude-phase control module.
Preferably, the amplitude and phase control module comprises a 90 ° electric bridge, two 180 ° bi-phase modulators, two first attenuators, a combiner and a second attenuator;
the input signal is input to the input end of the 90 ° electrical bridge, two output ends of the 90 ° electrical bridge are respectively connected to the input end of one first attenuator through one 180 ° bi-phase modulator, output ends of the two first attenuators are respectively connected to two input ends of the combiner, an output end of the combiner is connected to an input end of a second attenuator, and an output end of the second attenuator outputs the input signal adjusted to the target phase and the target amplitude;
the control signal is used for adjusting the phase of the 180 DEG bi-phase modulator and adjusting the attenuation values of the first attenuator and the second attenuator.
Preferably, the calibration control module comprises: a calibration sub-module and a control sub-module;
the calibration submodule is used for storing a calibration table, and the calibration table records corresponding amplitude and phase of the amplitude-phase control module under different control instructions;
the control sub-module is configured to obtain a target phase and a target amplitude of the input signal, read the calibration table, query a phase and an amplitude that are closest to the target phase and the target amplitude in the calibration table, obtain a control instruction corresponding to the closest phase and amplitude, convert the obtained control instruction into a control signal, and send the control signal to the 180 ° bi-phase modulator, the first attenuator, and the second attenuator, where the 180 ° bi-phase modulator, the first attenuator, and the second attenuator adjust a phase and an attenuation value according to the control signal.
Preferably, the calibration sub-module is further configured to invoke the control sub-module to send different control instructions to the amplitude-phase control module, test the amplitude and phase of the amplitude-phase control module under different control signals through a network analyzer, and record the amplitude and phase in the calibration table.
Preferably, the amplitude and phase control circuit further comprises: an input module;
the input module is used for inputting a phase requirement value and an amplitude requirement value of the input signal and sending the phase requirement value and the amplitude requirement value to the calibration control module;
the calibration control module is further configured to set the phase demand value to the target phase and the amplitude demand value to the target amplitude.
Preferably, the input module comprises a human-computer interaction interface.
A multi-channel amplitude and phase control circuit comprising: a calibration control unit and a magnitude-phase control unit;
the amplitude and phase control unit is used for receiving M paths of input signals, wherein M is a positive integer and is more than or equal to 2;
the calibration control unit is used for setting a target phase and a target amplitude of each path of input signal, generating a control signal and sending the control signal to the amplitude-phase control unit;
and the amplitude-phase control unit is also used for adjusting the phase of each path of input signals to a target phase and adjusting the amplitude to a target amplitude according to the control signals and then outputting the signals.
Preferably, the multi-channel amplitude and phase control circuit further comprises: a power division module;
the power dividing module is used for inputting N paths of signals to be processed, dividing the N paths of signals to be processed into M paths of output signals, and outputting the M paths of output signals to the amplitude-phase control unit as input signals, wherein N is a positive integer and N is less than M.
Preferably, the control signal is a digital signal, and the calibration control unit is further configured to convert the control signal into an analog signal and send the analog signal to the amplitude-phase control unit.
Preferably, the amplitude and phase control unit includes M amplitude and phase control branches, and each amplitude and phase control branch is used for adjusting the phase of the 1-path input signal to a target phase, and adjusting the amplitude to a target amplitude, and then outputting the adjusted signal.
Preferably, the amplitude and phase control branch comprises a 90 ° electrical bridge, two 180 ° bi-phase modulators, two first attenuators, a combiner and a second attenuator;
the input end of the 90-degree electrical bridge inputs 1 path of input signals, two output ends of the 90-degree electrical bridge are respectively connected to the input end of one first attenuator through one 180-degree bi-phase modulator, the output ends of the two first attenuators are respectively connected with two input ends of the combiner, the output end of the combiner is connected with the input end of the second attenuator, and the output end of the second attenuator outputs input signals adjusted to a target phase and a target amplitude;
the control signal is used for adjusting the phase of the 180 DEG bi-phase modulator and adjusting the attenuation values of the first attenuator and the second attenuator.
Preferably, the calibration control unit includes: a calibration subunit and a control subunit;
the calibration subunit is used for storing a calibration table, and the calibration table records corresponding amplitude and phase of the amplitude-phase control branch under different control instructions;
the control subunit is configured to obtain a target phase and a target amplitude of each path of input signals, read the calibration table, query a phase and an amplitude that are closest to the target phase and the target amplitude in the calibration table, obtain a control instruction corresponding to the closest phase and amplitude, convert the obtained control instruction into a control signal, and send the control signal to the 180 ° bi-phase modulator, the first attenuator, and the second attenuator, where the 180 ° bi-phase modulator, the first attenuator, and the second attenuator adjust a phase and an attenuation value according to the control signal.
Preferably, the calibration subunit is further configured to invoke the control subunit to send different control instructions to the amplitude-phase control branch, test the amplitude and phase of the amplitude-phase control branch under different control signals through a network analyzer, and record the amplitude and phase in the calibration table.
Preferably, the multi-channel amplitude and phase control circuit further comprises: an input unit;
the input unit is used for inputting the phase requirement value and the amplitude requirement value of each path of input signal and sending the phase requirement value and the amplitude requirement value to the calibration control unit;
the calibration control unit is further configured to set the phase demand value to the target phase and the amplitude demand value to the target amplitude.
Preferably, the input unit comprises a human-computer interaction interface. On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: the invention does not use the mode of a common chip numerical control phase shifter attenuator to realize amplitude-phase control, but designs the phase shifter by firstly manufacturing an analog circuit and then quantizing the phase shifter, thereby realizing the broadband and high-precision amplitude-phase control target. Therefore, the invention utilizes a digital quantization mode to control the analog amplitude-phase control module, so that the product has excellent amplitude and phase flatness and performance repeatability in a wide frequency band, and can obtain excellent amplitude and phase control precision, wider frequency bandwidth and higher amplitude control dynamic range.
Drawings
Fig. 1 is a schematic block diagram of a magnitude-phase control circuit according to embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of amplitude-phase control of an input signal by an amplitude-phase control module of the amplitude-phase control circuit according to embodiment 1 of the present invention.
Fig. 3 is a schematic circuit diagram of a magnitude-phase control module of the magnitude-phase control circuit according to embodiment 1 of the present invention.
Fig. 4 is a schematic block diagram of a multi-channel amplitude-phase control circuit according to embodiment 2 of the present invention.
Fig. 5 is a schematic diagram of amplitude-phase control of the amplitude-phase control unit of the multi-channel amplitude-phase control circuit according to embodiment 2 of the present invention with respect to M channels of input signals.
Fig. 6 is a schematic circuit diagram of the amplitude-phase control branch of the multi-channel amplitude-phase control circuit according to embodiment 2 of the present invention.
Fig. 7 is a schematic block diagram of another implementation of the multi-channel amplitude-phase control circuit in embodiment 2 of the present invention.
Fig. 8 is a schematic diagram of amplitude and phase control of the multi-channel amplitude and phase control circuit in fig. 7 on 1 channel of signals to be processed.
Fig. 9 is a schematic diagram of a 2 × 32 multi-channel amplitude and phase control circuit.
Fig. 10 is a schematic diagram of another 2 x 32 multi-channel amplitude and phase control circuit.
Fig. 11 is a schematic diagram of a 4 × 16 multi-channel amplitude and phase control circuit.
Fig. 12 is a schematic diagram of another 4 x 16 multi-channel amplitude and phase control circuit.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
Fig. 1 shows a magnitude-phase control circuit of the present embodiment, which is used to adjust the phase and amplitude of an input signal. The amplitude and phase control circuit comprises: a calibration control module 101 and a magnitude and phase control module 102.
The amplitude and phase control module 102 is configured to receive an input signal.
The calibration control module 101 is configured to set a target phase and a target amplitude of the input signal, generate a control signal, and send the control signal to the amplitude-phase control module 102.
The amplitude-phase control module 102 is further configured to adjust the phase of the input signal to a target phase according to the control signal, and output the adjusted amplitude to a target amplitude.
Wherein, the target phase and the target amplitude can be set by the user according to the actual requirement, and in order to facilitate the setting of the user, the amplitude and phase control circuit of the embodiment further comprises: an input module 103. The input module 103 is configured to input a phase requirement value and an amplitude requirement value of the input signal, and send the phase requirement value and the amplitude requirement value to the calibration control module 101; the calibration control module 101 sets the phase requirement value to the target phase and the amplitude requirement value to the target amplitude. In particular, the input module 103 may comprise a human-machine interface enabling a GUI (graphical user interface) allowing a user to input a phase requirement value and an amplitude requirement value of an input signal.
Fig. 2 shows a schematic diagram of amplitude and phase control of the input signal by the amplitude and phase control module 102 of the present embodiment. After the input signal is input to the amplitude and phase control module 102, the phase and amplitude are adjusted and then output. Fig. 3 shows a specific circuit of the amplitude and phase control module 102. The amplitude and phase control module 102 comprises a 90 ° bridge 1021, two 180 ° dual-phase modulators 1022, two first attenuators 1023, a combiner 1024, and a second attenuator 1025;
the input signal is input to the input end of the 90 ° electrical bridge 1021, two output ends of the 90 ° electrical bridge 1021 are respectively connected to the input end of one first attenuator 1023 through one 180 ° bi-phase modulator 1022, output ends of the two first attenuators 1023 are respectively connected to two input ends of the combiner 1024, the output end of the combiner 1024 is connected to the input end of the second attenuator 1025, and the output end of the second attenuator 1025 outputs the input signal adjusted to the target phase and the target amplitude;
the control signal is used to adjust the phase of the 180 ° bi-phase modulator 1022 and adjust the attenuation values of the first and second attenuators 1023 and 1025.
In this embodiment, the control signal is a digital signal, and the calibration control module 101 is further configured to convert the control signal into an analog signal and send the analog signal to the amplitude-phase control module 102. Under the control of the control signal, the phase of the signal output by the amplitude and phase control module 102 is equal to the target phase, and the amplitude is equal to the target amplitude. The amplitude and phase control module 102 of this embodiment may implement continuous control of wideband analog phase amplitude, may perform digital quantization processing on the control of the analog 180 ° bi-phase modulator, the first attenuator, and the second attenuator, and implement digital control, where the controlled bit number may be selected according to the required control accuracy of the amplitude and phase control circuit, and specifically, the formula for determining the controlled bit number is as follows:
360º/2nphase accuracy required for x 3 ≤
60dB/2nAmplitude precision with x 3 being less than or equal to requirement
Wherein n is the number of bits controlled.
If the control precision of 5 degrees is to be achieved, 8-bit phase control, 0.5dB precision, 9-bit amplitude control and the like can be selected.
In this embodiment, the calibration control module 101 includes: a calibration sub-module and a control sub-module.
The calibration submodule is configured to store a calibration table, where the calibration table records corresponding amplitudes and phases of the amplitude-phase control module 102 under different control instructions.
The calibration sub-module may specifically establish the calibration table in the following manner:
and calling the control submodule to send different control instructions to the amplitude-phase control module 102, testing the amplitude and the phase of the amplitude-phase control module 102 under different control signals through a network analyzer, and recording the amplitude and the phase in the calibration table. The network analyzer is a comprehensive microwave measuring instrument capable of scanning and measuring in a wide frequency band to determine network parameters, and can directly measure complex scattering parameters of an active or passive, reversible or irreversible double-port and single-port network and give amplitude and phase frequency characteristics of the scattering parameters in a frequency scanning mode.
The control sub-module is configured to obtain a target phase and a target amplitude of the input signal, read the calibration table, query a phase and an amplitude that are closest to the target phase and the target amplitude in the calibration table, obtain a control instruction corresponding to the closest phase and amplitude, convert the obtained control instruction into a control signal, and send the control signal to the 180 ° bi-phase modulator, the first attenuator, and the second attenuator, where the 180 ° bi-phase modulator, the first attenuator, and the second attenuator adjust a phase and an attenuation value according to the control signal.
The amplitude-phase control circuit of this embodiment can adjust the amplitude and the phase with respect to 1 channel of input signals, wherein the calibration control module 101 can accurately obtain the control signal required for reaching the target phase and the target amplitude by testing and calibrating the amplitude-phase frequency of the amplitude-phase control module 102, so as to realize the precise control of the amplitude-phase control module 102. The calibration control module 101 may be implemented using software programming that stores a computer program that implements the calibration sub-module and the control sub-module. As the device in the amplitude and phase control circuit is easy to realize broadband design, the frequency bandwidth of the amplitude and phase control circuit can reach 1.7-6GHz and 24-40GHz, and the dynamic ranges of 50dB and 360 degrees, the amplitude control precision of 0.2dB and the phase control precision of 2 degrees can be obtained in the full frequency band. In a dynamic range, any amplitude and phase value can be input on a human-computer interaction interface in a stepping mode with the minimum angle of 0.1dB and 1 degree, then a setting key is clicked, and the actual amplitude and phase value can be measured by a network analyzer and the deviation is within 0.2dB and 2 degrees.
Example 2
FIG. 4 shows a multi-channel amplitude-phase control circuit of the present embodiment for adjusting the phase and amplitude of M input signals, where M is a positive integer and M ≧ 2. The multichannel amplitude and phase control circuit includes: a calibration control unit 201 and a magnitude-phase control unit 202.
The amplitude and phase control unit 202 is used for receiving M paths of input signals.
The calibration control unit 201 is configured to set a target phase and a target amplitude of each input signal, generate a control [0077] signal, and send the control signal to the amplitude-phase control unit 202.
The amplitude and phase control unit 202 is further configured to adjust the phase of each input signal to a target phase, and adjust the amplitude to a target amplitude according to the control signal, and then output the target phase and the target amplitude.
Wherein, the target phase and the target amplitude can be set by the user according to the actual requirement, and in order to facilitate the setting of the user, the multi-channel amplitude and phase control circuit of the embodiment further comprises: an input unit 203. The input unit is configured to input a phase requirement value and an amplitude requirement value of each path of input signal, and send the phase requirement value and the amplitude requirement value to the calibration control unit 201; the calibration control unit 201 sets the phase demand value as the target phase and sets the amplitude demand value as the target amplitude. Specifically, the input unit 203 may include a human-machine interface capable of implementing a GUI (graphical user interface) allowing a user to input a phase requirement value and an amplitude requirement value of each output signal.
Fig. 5 shows a schematic diagram of amplitude and phase control of the amplitude and phase control unit 202 of the present embodiment for M input signals. After the M input signals are input to the amplitude and phase control unit 202, the phase and amplitude of each input signal are adjusted and then output. Specifically, the amplitude-phase control unit 202 includes M amplitude-phase control branches 2021, and each amplitude-phase control branch 2021 is used to adjust the phase of the 1-path input signal to a target phase, and adjust the amplitude to a target amplitude, and then output the target phase and the target amplitude.
Fig. 6 shows a specific circuit of the amplitude-phase control branch, which includes a 90 ° electrical bridge 20211, two 180 ° bi-phase modulators 20212, two first attenuators 20213, a combiner 20214, and a second attenuator 20215.
1 input signal is input to an input end of the 90 ° electrical bridge 20211, two output ends of the 90 ° electrical bridge 20211 are respectively connected to an input end of one of the first attenuators 20213 through one of the 180 ° bi-phase modulators 20212, output ends of the two first attenuators 20213 are respectively connected to two input ends of the combiner 20214, an output end of the combiner 20214 is connected to an input end of the second attenuator 20215, and an output end of the second attenuator 20215 outputs an input signal adjusted to a target phase and a target amplitude;
the control signal is used to adjust the phase of the 180 ° bi-phase modulator 20212 and to adjust the attenuation values of the first and second attenuators 20213, 20215. The second attenuator 20215 may be used to increase the dynamic range of the amplitude and phase control circuit, and obtain an attenuation value exceeding 20dB or more.
In this embodiment, the control signal is a digital signal, and the calibration control unit 201 is further configured to convert the control signal into an analog signal and send the analog signal to the amplitude and phase control unit 202. And under the control of the control signal, the phase of the signal output by the amplitude and phase control branch circuit is equal to the target phase, and the amplitude is equal to the target amplitude. The amplitude and phase control unit 202 of this embodiment can implement continuous control of wideband analog phase amplitude, can perform digital quantization processing on the control of the analog 180 ° bi-phase modulator, the first attenuator, and the second attenuator, and implement digital control, the controlled bit number can be selected according to the required control precision of the amplitude and phase control circuit, and specifically, the formula for determining the controlled bit number is as follows:
360º/2nphase accuracy required for x 3 ≤
60dB/2nAmplitude precision with x 3 being less than or equal to requirement
Wherein n is the number of bits controlled.
If the control precision of 5 degrees is to be achieved, 8-bit phase control, 0.5dB precision, 9-bit amplitude control and the like can be selected.
In this embodiment, the calibration control unit 201 includes: a calibration subunit and a control subunit.
The calibration subunit is configured to store a calibration table, where the calibration table records amplitudes and phases corresponding to the amplitude-phase control branch under different control instructions.
The calibration subunit may specifically establish the calibration table in the following manner:
and calling the control subunit to send different control instructions to the amplitude-phase control branch, testing the amplitude and the phase of the amplitude-phase control branch under different control signals through a network analyzer, and recording the amplitude and the phase in the calibration table. The network analyzer is a comprehensive microwave measuring instrument capable of scanning and measuring in a wide frequency band to determine network parameters, and can directly measure complex scattering parameters of an active or passive, reversible or irreversible double-port and single-port network and give amplitude and phase frequency characteristics of the scattering parameters in a frequency scanning mode.
The control subunit is configured to obtain a target phase and a target amplitude of each path of input signals, read the calibration table, query a phase and an amplitude that are closest to the target phase and the target amplitude in the calibration table, obtain a control instruction corresponding to the closest phase and amplitude, convert the obtained control instruction into a control signal, and send the control signal to the 180 ° bi-phase modulator, the first attenuator, and the second attenuator, where the 180 ° bi-phase modulator, the first attenuator, and the second attenuator adjust a phase and an attenuation value according to the control signal.
In this embodiment, the calibration control unit 201 can accurately obtain the control signal required to reach the target phase and the target amplitude by testing and calibrating the amplitude-phase frequency of the amplitude-phase control branch, so as to realize accurate control of the amplitude-phase control branch. The calibration control unit 201 may be implemented in software programming, which stores a computer program enabling the calibration subunit and the control subunit.
Because the devices in the amplitude and phase control branch circuit are easy to realize broadband design, the frequency bandwidth of the multichannel amplitude and phase control circuit can reach 1.7-6GHz and 24-40GHz, and 50dB and 360-degree dynamic ranges, 0.2dB amplitude control precision and 2-degree phase control precision can be obtained in a full frequency band. In a dynamic range, any amplitude and phase value can be input on a human-computer interaction interface in a stepping mode with the minimum angle of 0.1dB and 1 degree, then a setting key is clicked, and the actual amplitude and phase value can be measured by a network analyzer and the deviation is within 0.2dB and 2 degrees.
In this embodiment, the M input signals may be M signals output by an upper device and directly input to the amplitude-phase control unit 202, and M is set according to actual requirements.
In this embodiment, the M input signals may also be M signals obtained by dividing the signals output by a higher-level device through a power division module, as shown in fig. 7, an output end of the power division module 204 is connected to an input end of the amplitude-phase control unit 202, and is configured to input N to-be-processed signals, divide the N to-be-processed signals into M output signals, and output the M output signals as input signals to the amplitude-phase control unit 202, where N is a positive integer and N is less than M. The power dividing module 204 may specifically be implemented by using power dividers, the number of the power dividers may be determined according to the number of signals to be processed, if N paths of signals to be processed exist, the power dividing module is provided with N power dividers, each power divider corresponds to one path of signal to be processed, as shown in fig. 8, 1 path of signal to be processed is input to the power divider 2041 and then divided into multiple output signals, each output signal is input to 1 amplitude control branch 2021 as an input signal, each amplitude control branch 2021 performs phase and amplitude adjustment on the input signal, and finally outputs the adjusted signal. The values of M and N may be selected autonomously according to actual requirements, for example, as shown in fig. 9-10, two N =2 power dividers are used for the power dividing module, and a 2 × 32 multi-channel amplitude-phase control circuit composed of M =64 is used for the power dividing module, or as shown in fig. 11-12, two N =4 power dividers are used for the power dividing module, and a 4 × 16 multi-channel amplitude-phase control circuit composed of M =64 is used for the power dividing module, or a multi-channel amplitude-phase control circuit of other combinations is used.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (11)
1. A magnitude and phase control circuit, comprising: the method comprises the steps of calibrating a control module and a magnitude-phase control module;
the amplitude and phase control module is used for receiving an input signal;
the calibration control module is used for setting a target phase and a target amplitude of the input signal, generating a control signal and sending the control signal to the amplitude-phase control module;
the amplitude and phase control module is also used for adjusting the phase of the input signal to a target phase according to the control signal, and outputting the input signal after the amplitude is adjusted to the target amplitude;
the control signal is a digital signal, and the calibration control module is further used for converting the control signal into an analog signal and then sending the analog signal to the amplitude-phase control module;
the amplitude and phase control module comprises a 90-degree electric bridge, two 180-degree double-phase modulators, two first attenuators, a combiner and a second attenuator;
the input signal is input to the input end of the 90 ° electrical bridge, two output ends of the 90 ° electrical bridge are respectively connected to the input end of one first attenuator through one 180 ° bi-phase modulator, output ends of the two first attenuators are respectively connected to two input ends of the combiner, an output end of the combiner is connected to an input end of a second attenuator, and an output end of the second attenuator outputs the input signal adjusted to the target phase and the target amplitude;
the control signal is used for adjusting the phase of the 180 DEG bi-phase modulator and adjusting the attenuation values of the first attenuator and the second attenuator.
2. The phase control circuit of claim 1, wherein the calibration control module comprises: a calibration sub-module and a control sub-module;
the calibration submodule is used for storing a calibration table, and the calibration table records corresponding amplitude and phase of the amplitude-phase control module under different control instructions;
the control sub-module is configured to obtain a target phase and a target amplitude of the input signal, read the calibration table, query a phase and an amplitude that are closest to the target phase and the target amplitude in the calibration table, obtain a control instruction corresponding to the closest phase and amplitude, convert the obtained control instruction into a control signal, and send the control signal to the 180 ° bi-phase modulator, the first attenuator, and the second attenuator, where the 180 ° bi-phase modulator, the first attenuator, and the second attenuator adjust a phase and an attenuation value according to the control signal.
3. The amplitude-phase control circuit of claim 2, wherein the calibration sub-module is further configured to invoke the control sub-module to send different control commands to the amplitude-phase control module, test the amplitude and phase of the amplitude-phase control module under different control signals through a network analyzer, and record the amplitude and phase in the calibration table.
4. The phase control circuit of claim 1, wherein the phase control circuit further comprises: an input module;
the input module is used for inputting a phase requirement value and an amplitude requirement value of the input signal and sending the phase requirement value and the amplitude requirement value to the calibration control module;
the calibration control module is further configured to set the phase demand value to the target phase and the amplitude demand value to the target amplitude.
5. The phase-amplitude control circuit of claim 4, wherein the input module comprises a human-machine interface.
6. A multi-channel amplitude and phase control circuit, comprising: a calibration control unit and a magnitude-phase control unit;
the amplitude and phase control unit is used for receiving M paths of input signals, wherein M is a positive integer and is more than or equal to 2;
the calibration control unit is used for setting a target phase and a target amplitude of each path of input signal, generating a control signal and sending the control signal to the amplitude-phase control unit;
the amplitude and phase control unit is also used for adjusting the phase of each path of input signals to a target phase and adjusting the amplitude to a target amplitude according to the control signals and then outputting the signals;
the control signal is a digital signal, and the calibration control unit is further used for converting the control signal into an analog signal and then sending the analog signal to the amplitude-phase control unit;
the amplitude and phase control unit comprises M amplitude and phase control branches, and each amplitude and phase control branch is used for adjusting the phase of 1 path of input signals to a target phase and adjusting the amplitude to the target amplitude and then outputting the signals;
the amplitude and phase control branch comprises a 90-degree electric bridge, two 180-degree double-phase modulators, two first attenuators, a combiner and a second attenuator;
the input end of the 90-degree electrical bridge inputs 1 path of input signals, two output ends of the 90-degree electrical bridge are respectively connected to the input end of one first attenuator through one 180-degree bi-phase modulator, the output ends of the two first attenuators are respectively connected with two input ends of the combiner, the output end of the combiner is connected with the input end of the second attenuator, and the output end of the second attenuator outputs input signals adjusted to a target phase and a target amplitude;
the control signal is used for adjusting the phase of the 180 DEG bi-phase modulator and adjusting the attenuation values of the first attenuator and the second attenuator.
7. The multi-channel phase-amplitude control circuit of claim 6, wherein the multi-channel phase-amplitude control circuit further comprises: a power division module;
the power dividing module is used for inputting N paths of signals to be processed, dividing the N paths of signals to be processed into M paths of output signals, and outputting the M paths of output signals to the amplitude-phase control unit as input signals, wherein N is a positive integer and N is less than M.
8. The multi-channel phase-amplitude control circuit of claim 7, wherein the calibration control unit comprises: a calibration subunit and a control subunit;
the calibration subunit is used for storing a calibration table, and the calibration table records corresponding amplitude and phase of the amplitude-phase control branch under different control instructions;
the control subunit is configured to obtain a target phase and a target amplitude of each path of input signals, read the calibration table, query a phase and an amplitude that are closest to the target phase and the target amplitude in the calibration table, obtain a control instruction corresponding to the closest phase and amplitude, convert the obtained control instruction into a control signal, and send the control signal to the 180 ° bi-phase modulator, the first attenuator, and the second attenuator, where the 180 ° bi-phase modulator, the first attenuator, and the second attenuator adjust a phase and an attenuation value according to the control signal.
9. The multi-channel amplitude and phase control circuit of claim 8, wherein the calibration subunit is further configured to invoke the control subunit to send different control commands to the amplitude and phase control branch, test the amplitude and phase of the amplitude and phase control branch under different control signals through a network analyzer, and record the amplitude and phase in the calibration table.
10. The multi-channel phase-amplitude control circuit of claim 6, wherein the multi-channel phase-amplitude control circuit further comprises: an input unit;
the input unit is used for inputting the phase requirement value and the amplitude requirement value of each path of input signal and sending the phase requirement value and the amplitude requirement value to the calibration control unit;
the calibration control unit is further configured to set the phase demand value to the target phase and the amplitude demand value to the target amplitude.
11. The multi-channel amplitude and phase control circuit of claim 10, wherein the input unit comprises a human-machine interface.
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| CN114301549B (en) * | 2021-12-29 | 2023-08-04 | 重庆西南集成电路设计有限责任公司 | Amplitude and phase calibration method, system, medium and electronic equipment of amplitude and phase control circuit |
| CN114397634B (en) * | 2022-01-14 | 2023-06-09 | 中国电子科技集团公司第十研究所 | Airborne radar electronic warfare functional performance outfield ground test system |
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| CN101136733B (en) * | 2007-04-26 | 2010-08-18 | 中兴通讯股份有限公司 | Multi-channel digital automatic gain control device |
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