A Switch Amplitude Consistency Calibration Method and System

Abstract

The present invention provides a method and system for calibrating the amplitude consistency of a switch, belonging to the technical field of microwave switch amplitude calibration. The method includes: obtaining a calibration instruction, measuring an initial radio frequency signal using a calibration source; and using a power divider to distribute the signal to obtain an amplitude-consistent radio frequency signal and transmit it to a direction-finding matrix switch to obtain a signal processed by the matrix, and using a multi-channel receiver and an intermediate frequency board to process it to obtain multi-channel carrier amplitude information, calculating the channel amplitude difference and the error value of each channel; receiving the actual amplitude information, and calculating the matrix error value using the channel amplitude difference; according to the error value of each channel and the matrix error value, calibrating the switch information to obtain an amplitude and phase consistency signal; the present invention improves the amplitude consistency and phase consistency of the switch system in a wide temperature range environment, reduces the insertion loss fluctuation of the switch system under high isolation conditions, and optimizes the design and manufacturing process, improving the production efficiency of the switch system.

Description

Technical Field

[0001] The present invention belongs to the technical field of microwave switch amplitude calibration, and particularly relates to a switch amplitude consistency calibration method and system. Background Art

[0002] In the field of microwave radio frequency (RF) design, the design goals of microwave switches mainly focus on high isolation and low insertion loss. The currently common implementation methods include: differential structure design based on two-stage or multi-stage PIN diodes; this method has relatively flexible structure design and the isolation meets certain requirements, but the parameter discreteness of PIN diodes is relatively high, resulting in large fluctuations in isolation when the switch is off.

[0003] The influence of temperature change on isolation is significant. In high and low temperature environments, the isolation of each path may change by about 1.5 dB, and it is difficult to ensure the isolation consistency of the overall system; therefore, in a multi-way switch system, the step consistency and phase consistency in the off state are difficult to meet the application requirements; although the insertion loss is reduced to a certain extent, the influence of environmental temperature change on the dielectric constant of the medium is large, resulting in significant fluctuations in isolation with the change of the environment. The processing and matching processes are complex, and the batch production cost is high.

[0004] The existing technologies are difficult to meet the requirements of high isolation and phase consistency in wide temperature range application scenarios; especially under low temperature and high temperature conditions, the environmental adaptability of isolation and amplitude-phase consistency is insufficient, and the manufacturing cost is high, the process implementation is complex, reducing the industrialization efficiency. Summary of the Invention

[0005] In view of the above deficiencies in the prior art, the present invention provides a switch amplitude consistency calibration method and system, which solves the problems of insufficient environmental adaptability of amplitude consistency and phase consistency of the switch system in a wide temperature range environment, large fluctuations in insertion loss under high isolation conditions, and low production efficiency.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: on the one hand, the present invention provides a switch amplitude consistency calibration method, including the following steps:

[0007] S1. Obtain a calibration instruction, and use a calibration source to track and measure an initial radio frequency signal;

[0008] S2. Output the initial radio frequency signal to a power divider for signal distribution to obtain an amplitude consistency radio frequency signal;

[0009] S3. Use an amplitude-phase consistency cable to transmit the amplitude consistency radio frequency signal to a direction finding matrix switch for processing to obtain a signal processed by the matrix;

[0010] S4. Use a multi-channel receiver to receive the signals processed by the matrix and transmit them to the intermediate frequency board to obtain multi-channel carrier amplitude information. Calculate the channel amplitude difference and the error value of each channel according to the multi-channel carrier amplitude information.

[0011] S5. Use a direction-finding matrix switch to receive antenna signals to obtain actual amplitude information, and calculate the matrix error value of the direction-finding matrix switch by using the channel amplitude difference.

[0012] S6. Calibrate the microwave switch information according to the error value of each channel and the matrix error value, obtain amplitude and phase consistency signals and output them to complete the switch amplitude consistency calibration.

[0013] The beneficial effects of the present invention are as follows: Through the multi-level calibration using a calibration source, a power divider, and a direction-finding matrix switch, the amplitude consistency of the output signals of each channel is improved. The present invention not only corrects the amplitude error but also eliminates the phase error introduced by the matrix switch and the receiver, enhancing the overall consistency of the RF signals. By setting the connection structure of the calibration source, the power divider, the direction-finding matrix switch, the multi-channel receiver, and the intermediate frequency board, the automatic operation of the calibration process is realized. From signal distribution to multi-channel reception, and then to error calculation and correction, no manual intervention is required, improving the efficiency and accuracy.

[0014] Further, the S1 includes the following steps:

[0015] S101. Obtain a calibration instruction and use the intermediate frequency board to send the calibration instruction through a controller.

[0016] S102. The calibration source receives the calibration instruction and enters the working mode, tracks and measures the frequency amplitude information output by the microwave switch system, and generates an initial RF signal.

[0017] The beneficial effects of the above further solution are as follows: The present invention uses a calibration source to track and measure the frequency amplitude information output by the microwave switch system, obtains real-time RF signals, and improves the accuracy of RF signal calibration. And the present invention can be widely applied to multi-channel signal switching systems, providing the ability to support reception and processing in complex signal environments, and enhancing the quality and stability of signal reception.

[0018] Still further, the S2 is specifically:

[0019] Output the initial RF signal to the power divider, and use the power divider to distribute the signal of the calibration source to multiple paths to obtain amplitude-consistent RF signals.

[0020] The beneficial effects of the above further solution are as follows: The present invention provides a power divider to distribute the phase consistency technical index and amplitude consistency index of the received signal, maintaining the consistency of the received signal and enabling a series of losses and phases to be output to the next-stage port in a consistent manner.

[0021] Furthermore, S3 includes the following steps:

[0022] S301: Transmit the amplitude-consistent radio frequency signal to the direction-finding matrix switch using an amplitude-phase consistency cable;

[0023] S302: Use the direction-finding matrix switch to perform multi-channel switching on the amplitude-consistent radio frequency signal and perform self-check calibration on the switched amplitude-consistent radio frequency signal to obtain the signal processed by the matrix.

[0024] The beneficial effects of the above further solution are as follows: The present invention uses a direction-finding matrix switch for step-by-step switching calibration, improving the amplitude consistency and phase consistency of the radio frequency signal.

[0025] Furthermore, S4 includes the following steps:

[0026] S401: Use a multi-channel receiver to receive the signal processed by the matrix and transmit it to the intermediate frequency board card to obtain multi-channel carrier amplitude information;

[0027] S402: Take the first carrier amplitude information of the first channel as a reference and perform normalization;

[0028] S403: Calculate the channel amplitude difference of each channel except the first channel relative to the first channel according to the first carrier amplitude information and the carrier amplitude information of the other channels;

[0029] S404: Analyze the amplitude difference to obtain the error value of each channel.

[0030] The beneficial effects of the above further solution are as follows: The present invention uses a multi-channel receiver, calculates the error value of the channel, introduces an error separation and normalization calculation method, precisely compensates the amplitude error of each channel, and effectively eliminates the inconsistency problem caused by device differences in the system.

[0031] Furthermore, S5 includes the following steps:

[0032] S501: Use the direction-finding matrix switch to receive the antenna signal to obtain the actual amplitude information;

[0033] S502: Use the channel amplitude difference to subtract from the actual amplitude information to calculate the matrix error value of the direction-finding matrix switch.

[0034] The beneficial effects of the above further solution are as follows: By using the direction-finding matrix switch to receive the actual amplitude information, the present invention not only corrects the amplitude error, but also eliminates the phase error introduced by the matrix switch and the receiver, further improving the overall consistency of the signal. After eliminating the errors introduced by the switch matrix and the multi-channel receiver, the consistency of the system output signal is significantly improved, laying a stable foundation for subsequent signal processing and analysis.

[0035] To achieve the above object, according to the second aspect of the present invention, there is provided a switch amplitude consistency calibration system for performing the above-mentioned switch amplitude consistency calibration method, which is characterized by including:

[0036] A calibration source module for tracking and measuring the frequency amplitude information output by the system in real time and generating an initial radio frequency signal;

[0037] A power divider module for distributing the initial radio frequency signal generated by the calibration source into multiple paths of information and providing radio frequency signals with amplitude consistency;

[0038] A direction-finding matrix switch module for receiving the radio frequency signal with amplitude consistency by using an amplitude-phase consistency cable and performing multi-path switching calibration on the radio frequency signal with amplitude consistency to obtain a signal processed by the matrix;

[0039] A receiver module for receiving the signal processed by the matrix and performing calibration processing on the signal processed by the matrix to obtain a signal with amplitude and phase consistency;

[0040] An intermediate frequency board module for performing amplitude-phase consistency acquisition and correction according to the signal with amplitude and phase consistency.

[0041] The beneficial effects of the above solution are as follows: By using a direction-finding matrix switch and a multi-channel receiver, the present invention analyzes the errors of the received signal and eliminates the errors introduced by the equipment, providing high-precision amplitude-phase consistency calibration ability and enabling the switch amplitude consistency calibration system to adapt to wide-temperature application scenarios. By using a dynamic feedback mechanism, the environmental adaptability is enhanced, and the performance fluctuation caused by temperature change is effectively reduced. The design process is simplified, batch production is supported, and the production cost is reduced. The present invention significantly improves the isolation, amplitude consistency, and phase consistency of the microwave switch system, realizing the application of a radio frequency system that can meet high requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a flowchart of the method of the present invention.

[0043] Figure 2 It is a schematic block diagram of the switch amplitude consistency calibration method in this embodiment.

[0044] Figure 3This is the actual structural schematic diagram of the principle block diagram of the switch amplitude consistency calibration method in this embodiment. Detailed implementation manners

[0045] The following describes the detailed implementation manners of the present invention to facilitate those skilled in the art of this technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the detailed implementation manners. For those of ordinary skill in the art of this technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions made using the concept of the present invention are within the scope of protection.

[0046] Embodiment 1

[0047] As Figure 1 shown, the present invention provides a switch amplitude consistency calibration method, and its implementation method is as follows:

[0048] S1. Obtain a calibration instruction, and use a calibration source to track and measure an initial radio frequency signal. The specific steps are as follows:

[0049] S101. Obtain a calibration instruction, and use an intermediate frequency board to send the calibration instruction through a controller;

[0050] S102. The calibration source receives the calibration instruction and enters the working mode, tracks and measures the frequency and amplitude information output by the microwave switch system, and generates an initial radio frequency signal.

[0051] In this embodiment, start the calibration mode, obtain a calibration instruction, use an intermediate frequency board to send the calibration instruction through a controller, start the calibration source and enter the working mode, and track and measure the frequency and amplitude information output by the system in real time to generate an initial radio frequency signal.

[0052] S2. Output the initial radio frequency signal to a power divider for signal distribution to obtain a radio frequency signal with amplitude consistency. Specifically:

[0053] Output the initial radio frequency signal to a power divider, and use the power divider to distribute the signal of the calibration source to multiple paths to obtain a radio frequency signal with amplitude consistency.

[0054] In this embodiment, output the initial radio frequency signal to a power divider and prepare for distribution to multiple paths in the power divider;

[0055] Use the power divider to distribute the signal of the calibration source to multiple paths to obtain a radio frequency signal with amplitude consistency, ensuring that the output signal has amplitude consistency.

[0056] S3. Use a cable with amplitude and phase consistency to transmit the radio frequency signal with amplitude consistency to a direction finding matrix switch for processing to obtain a signal processed by the matrix. The specific steps are as follows:

[0057] S301. Transmit the amplitude-consistent RF signal to the direction-finding matrix switch using the amplitude-phase consistency cable;

[0058] S302. Use the direction-finding matrix switch to perform multi-channel switching on the amplitude-consistent RF signal, and perform self-check correction on the switched amplitude-consistent RF signal to obtain the signal processed by the matrix.

[0059] In this embodiment, the amplitude-consistent RF signal output by the power divider is transmitted to the direction-finding matrix switch through the amplitude-phase consistency cable;

[0060] Use the direction-finding matrix switch to correct the amplitude-consistent RF signal. The direction-finding matrix switch switches the amplitude-consistent and phase-consistent signals from the power divider;

[0061] Due to the errors of the matrix switch's own devices, there may be inconsistencies in each channel. Therefore, self-check correction is performed on the switched amplitude-consistent RF signal to obtain the signal processed by the matrix.

[0062] S4. Use a multi-channel receiver to receive the signal processed by the matrix and transmit it to the intermediate frequency board card to obtain multi-channel carrier amplitude information. According to the multi-channel carrier amplitude information, calculate the channel amplitude difference and the error value of each channel. The specific steps are as follows:

[0063] S401. Use a multi-channel receiver to receive the signal processed by the matrix and transmit it to the intermediate frequency board card to obtain multi-channel carrier amplitude information;

[0064] S402. Use the first carrier amplitude information of the first channel as a reference and perform normalization;

[0065] S403. According to the first carrier amplitude information and the carrier amplitude information of the remaining channels, calculate the channel amplitude difference of each channel except the first channel relative to the first channel;

[0066] S404. Analyze the amplitude difference to obtain the error value of each channel.

[0067] In this embodiment, the multi-channel receiver receives the signal processed by the matrix and transmits it to the intermediate frequency board card. However, due to possible errors introduced between the channels of the receiver itself, the intermediate frequency board card receives the carrier amplitude information of each channel through the receiver and calculates the error value.

[0068] In this embodiment, five channels are used to obtain the carrier amplitude information A1, A2, A3, A4, and A5 of each channel respectively. At this time, the carrier amplitude information includes the processing errors of the calibration source, power divider, and switch matrix;

[0069] Use the first carrier amplitude information A1 of the first channel as a reference and normalize it to 0;

[0070] Calculate the channel amplitude differences of each channel except the first channel relative to the first channel according to the first carrier amplitude information A1 and the carrier amplitude information A2, A3, A4, A5 of the remaining channels; subtract the carrier amplitude information A2, A3, A4, A5 of the remaining channels from the first carrier amplitude information to obtain the corresponding amplitude differences; the calculation expression of the amplitude differences is as follows:

[0071] ;

[0072] ;

[0073] ;

[0074] ;

[0075] wherein, represents the amplitude difference of the second channel relative to the first channel, represents the amplitude difference of the third channel relative to the first channel, represents the amplitude difference of the fourth channel relative to the first channel, represents the amplitude difference of the fifth channel relative to the first channel;

[0076] Analyze the amplitude differences, and subtract the carrier amplitude information of each channel from to obtain the error value of each channel.

[0077] S5. Use the direction-finding matrix switch to receive the antenna signal to obtain the actual amplitude information, and use the channel amplitude difference to calculate the matrix error value of the direction-finding matrix switch. The specific steps are as follows:

[0078] S501. Use the direction-finding matrix switch to receive the antenna signal to obtain the actual amplitude information;

[0079] S502. Use the channel amplitude difference to subtract the actual amplitude information to calculate the matrix error value of the direction-finding matrix switch.

[0080] In this embodiment, to eliminate the error introduced by the matrix switch itself, use the direction-finding matrix switch to receive the antenna signal to obtain the actual amplitude information, and calculate the actual amplitude difference 、 、 、 ;

[0081] Subtract the actual amplitude information from the calibration error amplitude information to obtain the matrix error value of the direction-finding matrix switch; the calculation expression of the matrix error value of the direction-finding matrix switch is as follows:

[0082] ;

[0083] ;

[0084] ;

[0085] ;

[0086] wherein, represents the matrix error value of the second channel relative to the first channel, represents the matrix error value of the third channel relative to the first channel, represents the matrix error value of the fourth channel relative to the first channel, represents the matrix error value of the fifth channel relative to the first channel, represents the actual amplitude difference of the second channel relative to the first channel, represents the actual amplitude difference of the third channel relative to the first channel, represents the actual amplitude difference of the fourth channel relative to the first channel, represents the actual amplitude difference of the fifth channel relative to the first channel;

[0087] The error introduced by the matrix switch itself is eliminated by using the matrix error value to complete the calibration.

[0088] S6. Calibrate the microwave switch information according to the error value and matrix error value of each channel, obtain the amplitude and phase consistency signals and output them to complete the switch amplitude consistency calibration.

[0089] In this embodiment, the microwave switch information is calibrated according to the error value and matrix error value of each channel, the amplitude and phase consistency signals are obtained and output to complete the switch amplitude consistency calibration.

[0090] In this embodiment, as Figure 2 shown, use the controller to issue an instruction to control the calibration source to track and measure the frequency amplitude information output by the microwave switch system, generate an initial radio frequency signal, and output the initial radio frequency signal to the power divider. Use the power divider to distribute the signal of the calibration source to multiple paths, and each path is a direction finding calibration switch, including: the sixth single-pole double-throw switch SPDT6, the seventh single-pole double-throw switch SPDT7, the eighth single-pole double-throw switch SPDT8, the ninth single-pole double-throw switch SPDT9, and the tenth single-pole double-throw switch SPDT10; at the same time, according to multiple direction finding antennas, measure the actual amplitude information and transmit it to the direction finding calibration switch through the antenna selection switch; the first direction finding antenna passes through the first single-pole double-throw switch SPDT1; the second direction finding antenna and the sixth direction finding antenna pass through the second single-pole double-throw switch SPDT2; the third direction finding antenna and the seventh direction finding antenna pass through the third single-pole double-throw switch SPDT3; the fourth direction finding antenna and the eighth direction finding antenna pass through the fourth single-pole double-throw switch SPDT4; the fifth direction finding antenna passes through the first single-pole double-throw switch SPDT5;

[0091] The direction finding calibration switch and the antenna selection switch are both uncalibratable and are controlled by the controller;

[0092] The signal passing through the direction finding calibration switch passes through the down-conversion receiver RX, and the ΔArx error is calculated, and then passes through the analog-to-digital converter AD to obtain the in-phase quadrature signal IQ; The IQ signal is a modulation method used to represent and process signals; Here, the down-conversion receiver RX and the analog-to-digital converter AD serve as the direction finding channels and can be calibrated, and the down-conversion receiver RX and the analog-to-digital converter AD are controlled by the controller;

[0093] Specifically, obtaining the in-phase quadrature signal IQ is as follows:

[0094] The signal passing through the sixth single-pole double-throw switch SPDT6 passes through the first down-conversion receiver RX1, uses the actual amplitude information and the information transmitted by the power divider to calculate the first error ΔArx1, and passes through the first analog-to-digital converter AD1 to obtain the first in-phase quadrature signal IQ1;

[0095] The signal passing through the seventh single-pole double-throw switch SPDT7 passes through the second down-conversion receiver RX2, uses the actual amplitude information and the information transmitted by the power divider to calculate the second error ΔArx2, and passes through the second analog-to-digital converter AD12 to obtain the second in-phase quadrature signal IQ2;

[0096] The signal passing through the eighth single-pole double-throw switch SPDT8 passes through the third down-conversion receiver RX3, uses the actual amplitude information and the information transmitted by the power divider to calculate the third error ΔArx3, and passes through the third analog-to-digital converter AD3 to obtain the third in-phase quadrature signal IQ3;

[0097] The signal passing through the ninth single-pole double-throw switch SPDT9 passes through the fourth down-conversion receiver RX4, uses the actual amplitude information and the information transmitted by the power divider to calculate the fourth error ΔArx4, and passes through the fourth analog-to-digital converter AD4 to obtain the fourth in-phase quadrature signal IQ4;

[0098] The signal passing through the tenth single-pole double-throw switch SPDT10 passes through the fifth down-conversion receiver RX5, uses the actual amplitude information and the information transmitted by the power divider to calculate the fifth error ΔArx5, and passes through the fifth analog-to-digital converter AD5 to obtain the fifth in-phase quadrature signal IQ5;

[0099] According to the above implementation structure, as Figure 3The actual structure diagram shown selects eight groups of antennas for amplitude comparison. The eight groups of antennas correspond to Input 1 to Input 8 in the figure. First, the radio frequency signal is input into the amplitude comparison switch matrix through the calibration input 4 for switching self-check. After detecting that the amplitude comparison switch works normally, switch to use the antenna input, that is, measure the signal through Input 1 to Input 8. Calibrate the radio frequency signal input through the calibration input 4 with the radio frequency signals input through Input 1 to Input 8 to obtain the amplitude and phase consistency signals and output them to Output 1 to Output 5. Spare Input 1 and Spare Input 2 are used for function expansion.

[0100] Embodiment 2

[0101] In this embodiment, a switch amplitude consistency calibration system is used to execute a switch amplitude consistency calibration method as described in Embodiment 1, including:

[0102] A calibration source module is used to track and measure the frequency and amplitude information output by the measurement system in real time, generate an initial radio frequency signal, and distribute the signal to the direction finding matrix switch module through a power divider module;

[0103] A power divider module is used to distribute the initial radio frequency signal generated by the calibration source, distribute it to multiple paths, and provide amplitude consistency radio frequency signals;

[0104] A direction finding matrix switch module is used to receive the amplitude consistency radio frequency signal by using an amplitude-phase consistency cable, and perform multi-path switching calibration on the amplitude consistency radio frequency signal to obtain a signal processed by the matrix, ensuring the amplitude consistency and phase consistency of the input signal;

[0105] A receiver module is used to receive the signal processed by the matrix and perform calibration processing on the signal processed by the matrix to obtain amplitude and phase consistency signals;

[0106] An intermediate frequency board module is used to perform amplitude-phase consistency acquisition and correction according to the amplitude and phase consistency signals.

[0107] In this embodiment, the working principle of a switch amplitude consistency calibration system is specifically as follows:

[0108] The calibration source module generates a high-precision reference signal and distributes the information to the direction finding matrix switch module through a power divider;

[0109] The direction finding matrix switch module ensures that the amplitude-phase consistency meets the preset requirements when the signal is input to the receiving module through step-by-step switching calibration;

[0110] The receiving module frequency-converts the calibrated signal and outputs it to the intermediate frequency board module, and completes amplitude-phase consistency acquisition and correction in the intermediate frequency board module;

[0111] The switch amplitude consistency calibration system performs self-check on the device status through a real-time loop detection mechanism and dynamically adjusts the amplitude-phase correction parameters to adapt to environmental changes.

Claims

1. A switch amplitude consistency calibration method, characterized in that: The following steps are involved: S1. Obtain calibration instructions and use a correction source to track and measure the initial RF signal; S2, outputting the initial RF signal to a power divider for signal distribution to obtain an amplitude consistent RF signal; S3, using an amplitude-phase consistency cable, transmitting the amplitude-consistent RF signal to a direction-finding matrix switch for processing, and obtaining a matrix-processed signal; S4, using a multi-channel receiver to receive the matrix-processed signal and transmit it to the intermediate frequency board, obtaining multi-channel carrier amplitude information, and calculating the channel amplitude difference and the error value of each channel according to the multi-channel carrier amplitude information; S5. Utilize the direction finding matrix switch to receive the antenna signal, obtain the actual amplitude information, and use the channel amplitude difference to calculate the matrix error value of the direction finding matrix switch, specifically: S501, using a direction finding matrix switch to receive antenna signals and obtain actual amplitude information; S502, using the channel amplitude difference to perform subtraction with the actual amplitude information, to calculate a matrix error value of the direction finding matrix switch; S6. According to the error value of each channel and the matrix error value, the microwave switch information is calibrated to obtain the amplitude and phase consistency signal and output it, thus completing the switch amplitude consistency calibration.

2. A switch amplitude consistency calibration method according to claim 1, characterized in that: The S1 comprises the following steps: S101, obtaining a calibration instruction, and using the intermediate frequency board to send the calibration instruction through the controller; S102: The correction source receives the calibration instruction and enters the working mode, tracks and measures the frequency amplitude information output by the microwave switch system, and generates an initial radio frequency signal.

3. A switch amplitude consistency calibration method according to claim 1, characterized in that: The S2 is specifically: The initial RF signal is output to a power divider, and the power divider is used to distribute the signal of the correction source to multiple paths to obtain an amplitude consistent RF signal.

4. A switch amplitude consistency calibration method according to claim 1, characterized in that: The S3 comprises the following steps: S301, transmitting the amplitude consistent radio frequency signal to the direction finding matrix switch by using an amplitude consistent cable; S302: Use a direction finding matrix switch to perform multi-channel switching on the amplitude consistency radio frequency signal, and perform self-checking and correction on the switched amplitude consistency radio frequency signal to obtain a matrix-processed signal.

5. A switch amplitude consistency calibration method according to claim 1, characterized in that: The S4 comprises the following steps: S401, using a multi-channel receiver to receive the matrix-processed signal and transmit it to an intermediate frequency board to obtain multi-channel carrier amplitude information; S402, taking the first carrier amplitude information of the first channel as a reference and normalizing it; S403, calculating the channel amplitude difference of each channel except the first channel relative to the first channel according to the first carrier amplitude information and the carrier amplitude information of the remaining channels; S404: Analyze the amplitude difference to obtain the error value of each channel.

6. A switch amplitude consistency calibration system, used to execute a switch amplitude consistency calibration method according to any one of claims 1 to 5, characterized in that: include: A correction source module is used to track the frequency amplitude information output by the measurement system in real time and generate an initial RF signal; The power divider module is used to distribute the initial RF signal generated by the correction source into multiple channels to provide a RF signal with consistent amplitude; A direction finding matrix switch module is used to receive an amplitude consistent radio frequency signal using an amplitude consistent cable, and to perform multi-channel switching calibration on the amplitude consistent radio frequency signal to obtain a matrix processed signal; A receiver module is used to receive the matrix-processed signal and perform calibration processing on the matrix-processed signal to obtain an amplitude and phase consistency signal; The intermediate frequency board module is used to collect and correct amplitude and phase consistency based on amplitude and phase consistency signals.

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