Real-time monitoring and correcting method for microwave channel of digital T / R assembly

Abstract

The invention relates to a digital T / R assembly microwave channel real-time monitoring and calibration method, and belongs to the technical field of radars. Testing signals 1 and 2 are generated in a time-sharing manner according to the calibration requirement and the calibration time sequence; the electronic switch matrix at least comprises four levels of electronic switches K1, K2, K3 and K4; a receiving channel of the transmit-receive filtering module comprises a receiving sub-array internal calibration state, a receiving test state and the like; the transmitting channel comprises a transmitting sub-array internal calibration state, a transmitting test state and the like; the monitoring channel is mainly composed of an electronic switch matrix. When calibration in the receiving sub-array is carried out, the digital T / R assembly is in a receiving test state, and AD compensation is carried out on a test signal 1 area and a receiving working area of the digital T / R assembly to realize a receiving channel amplitude-phase real-time calibration function; when calibration is carried out in the transmitting sub-array, the digital T / R assembly is in a transmitting test state, AD compensation is carried out on a test signal 1 area and a receiving working area of the digital T / R assembly, and the transmitting channel amplitude-phase real-time calibration function is achieved. And the amplitude-phase stability and the amplitude-phase precision are greatly improved.

Description

Technical Field

[0001] The invention relates to a real-time monitoring and correction method for a microwave channel of a digital T / R component, belonging to the technical field of radar manufacturing. Background Art

[0002] With the substantial increase in the number of channels of phased array radar T / R components, the instantaneous signal bandwidth has also developed from narrowband coverage to full bandwidth coverage. In this way, the consistency requirements for the received amplitude and phase and the transmitted phase are increasingly higher. In actual work, due to temperature changes and the decline in device performance, the amplitude and phase consistency of the radar is constantly deteriorating. However, the current phased array radar generally only has real-time monitoring functions and cannot perform real-time calibration of amplitude and phase consistency. If manual inspection, maintenance and calibration are performed, it will not only be time-consuming and laborious, but also unable to respond to the continuous deterioration of the amplitude and phase consistency of the array in real time, which will eventually seriously affect the working performance of the phased array radar. Therefore, it is very important to develop a real-time monitoring and correction method for the microwave channel of a digital T / R component to achieve real-time monitoring and real-time calibration to meet the high amplitude and phase consistency requirements of the sub-array phased array radar. Summary of the invention

[0003] The object of the present invention is to provide a real-time monitoring and calibration method for microwave channels of digital T / R components that is compatible with multiple calibration modes in view of the deficiencies of the above-mentioned prior art. By designing the radar into a sub-array, the development and production costs are greatly reduced, and the array synchronization problem is better solved. The method has unit-level calibration, sub-array-level calibration and real-time monitoring functions, meets the high standard requirements for amplitude and phase consistency of phased array radars, is conducive to on-site array calibration, and realizes fast, real-time and efficient calibration, so as to solve the problem that the existing phased array radar T / R components are difficult to meet the high amplitude consistency requirements of sub-array phased array radars and the difficulty of on-site real-time calibration of the array due to the lack of real-time calibration function configuration.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: A real-time monitoring and calibration method for a microwave channel of a digital T / R component comprises a switch power divider and a transceiver filter module; the characteristics are as follows: the switch power divider is mainly composed of a power divider of a test signal and an electronic switch matrix, and completes the power division of the test signal and the switching function of the test signal and the transmission coupling signal; the power divider divides the test signal into n paths according to the design requirements of the subarray channel, and then respectively switches the signals with the n transmission coupling signals input by the analog T / R component into n electronic switches of the electronic switch matrix to form n monitoring signals; the working state of the electronic switch matrix switches the selected path arbitrarily according to the amplitude and phase calibration requirements; the test signal generates a test signal 1 and a test signal 2 according to the calibration requirements and the calibration timing; the electronic switch matrix comprises at least 4 levels of electronic switches K1, K2, K3, and K4; The transceiver filtering module is mainly composed of a receiving channel, a transmitting channel and a monitoring channel. The receiving channel includes a calibration state within the receiving subarray, a receiving test state, an amplitude and phase consistency state between the receiving signal source and the subarray digital T / R component, a real-time amplitude and phase compensation state for the test signal 1 due to temperature changes, and a receiving working state; the transmitting channel includes a calibration state within the transmitting subarray, a transmitting test state, an amplitude and phase consistency state between the transmitting signal source and the subarray digital T / R component, a real-time amplitude and phase compensation state for the test signal 2 due to temperature changes, and a transmitting working state; the monitoring channel is mainly composed of an electronic switch matrix, wherein the electronic switch K1 completes the switching between the echo signal and the test signal in the monitoring signal; the electronic switch K2 completes the switching of whether the test signal in the monitoring signal enters the electronic switch K1 or the transmitting coupled signal in the monitoring signal enters the electronic switch K3; the electronic switch K3 completes the switching between the transmitting coupled signal and the receiving signal in the monitoring signal; the electronic switch K4 completes the switching of the corresponding signal into the AD port or the JC port; During the calibration within the receiving subarray, the digital T / R component is in the receiving test state, the main control computer calls the amplitude and phase difference between the receiving channel and the test signal 1 channel, and compensates the amplitude and phase value of the test signal 1 channel read in real time by AD sampling, so as to feed back the amplitude and phase value of the corrected receiving channel; when the amplitude and phase consistency of the test signal 1 exceeds the threshold value, AD compensation is performed on the test signal 1 area and the receiving working area of ​​the digital T / R component, and finally the real-time amplitude and phase calibration function of the receiving channel is realized; During the calibration within the transmitting subarray, the digital T / R component is in the transmitting test state, the main control computer calls the amplitude and phase difference between the transmitting coupling channel and the test signal 2 channel, and compensates the amplitude and phase value of the test signal 2 channel read by the AD in real time, thereby feeding back the amplitude and phase value of the corrected transmitting coupling channel; when the amplitude and phase consistency of the test signal 2 exceeds the threshold value, AD compensation is performed on the test signal 2 area and the transmitting coupling working area of ​​the digital T / R component, and finally the transmitting channel amplitude and phase real-time calibration function is realized.

[0005] In the receiving test state, the test signal 1 is input through the test signal input port CSIN of the switch power divider, and then enters the transceiver filter module through the monitoring signal port LSin, and is cut into the receiving channel through the electronic switches K1 and K2 in the transceiver filter module. After completing the processing of the same channel as the received signal, it is cut to the AD port through the electronic switch K4 for AD sampling, and the acquisition of the amplitude and phase data of the test channel is completed through the digital T / R component AD sampling. The amplitude and phase difference value of the corrected receiving channel and the corresponding test signal 1 channel is obtained by calculation and stored in the digital T / R component; or it is cut to the JC port through the electronic switch K4 and the performance index test of the test signal 1 is completed through the instrument.

[0006] In the transmission test state, the test signal 2 is input through the switch power divider test signal input port CSIN, and then enters the transceiver filter module through the monitoring signal port LSin, and is cut into the transmission coupling channel through the electronic switches K2 and K3 in the transceiver filter module, and is cut to the AD port through the electronic switch K4 for A / D sampling. The acquisition of the amplitude and phase data of the test channel is completed through the digital T / R component AD sampling, and the amplitude and phase difference value between the corrected transmission coupling channel and the corresponding test signal 2 channel is obtained by calculation and stored in the digital T / R component; or it is cut to the JC port to complete the performance index test of the test signal 2 through the instrument.

[0007] The amplitude and phase consistency state between the receiving signal source and the sub-array digital T / R components is achieved by generating a pulse modulation signal of the receiving signal source through an externally triggered synchronous square wave sent by the digital T / R component, and clearing the starting phase in each pulse to avoid the influence on the amplitude and phase consistency caused by AD sampling incoherence and inconsistent starting phases, thereby effectively ensuring the amplitude and phase consistency between the sub-array T / R components.

[0008] The amplitude and phase consistency state between the transmitting signal source and the sub-array digital T / R components is achieved by generating a pulse modulation signal of the transmitting signal source through an externally triggered synchronous square wave sent by the digital T / R component, and clearing the starting phase in each pulse to avoid the influence on the amplitude and phase consistency caused by AD sampling incoherence and inconsistent starting phases, thereby effectively ensuring the amplitude and phase consistency between the sub-array T / R components.

[0009] The real-time compensation state of the amplitude and phase of the test signal 1 due to temperature changes, the amplitude and phase characteristics of the test signal 1 in the switching power divider that change with temperature, and the amplitude and phase compensation curves obtained through testing are stored in the digital T / R component. The digital T / R component performs real-time compensation for the amplitude and phase of the test signal 1 according to the feedback temperature, effectively avoiding errors in the received amplitude and phase caused by the influence of temperature on the switching power divider.

[0010] The real-time compensation state of the amplitude and phase of the test signal 2 due to temperature change is described. The amplitude and phase characteristics of the test signal 2 and the transmission coupled signal change with temperature in the switching power divider. Two sets of amplitude and phase compensation curves are obtained through testing and stored in the digital T / R component. The digital T / R component performs real-time compensation for the amplitude and phase of the test signal 2 and the transmission coupled signal according to the feedback temperature, effectively avoiding errors in the transmission amplitude and phase caused by the influence of temperature on the switching power divider.

[0011] The switch power divider comprises a test signal power divider and an electronic switch matrix. The test signal received at the CSIN input end of the switch power divider is split into n paths by the test signal power divider, and then respectively combined with the n-path transmission coupling signals sent by the analog T / R component through the electronic switch matrix to form n-path monitoring signals and sent to the transceiver filter module.

[0012] The transceiver filtering module described above receives the echo signal from the JSin input terminal of the receiving link through the electronic switch K1, and then receives the signal through low noise amplifier, bandpass filtering, frequency selection filtering and other receiving processes, and then cuts the monitoring signal input from the LSin input terminal of the electronic switch K3 and the electronic switch K2 into one signal and sends it to the electronic switch K4, which sends the signal to the AD port or the JC port after the switching action; the excitation signal received from the JLin input terminal of the transmitting link is subjected to transmission processing such as bandpass filtering, amplification, frequency selection filtering, etc., and then outputs the excitation signal through the JLout output port.

[0013] The beneficial effects of the present invention compared with the prior art are: The real-time monitoring and calibration method of the microwave channel of the digital T / R component realizes the injection of the test signal into the receiving channel or the AD channel in time-sharing according to the test requirements of different calibration modes, or the injection of the transmission coupling signal into the AD channel through the switching power divider, the transceiver filter module, and the optimized circuit design, and realizes the real-time monitoring and correction function of the receiving amplitude and phase, the transmitting phase, and the real-time monitoring function of the transmitting power by simplifying and optimizing the circuit design and control instructions; not only has strong working reliability, but also by performing phase difference processing on the reference channel and the monitoring channel, the amplitude and phase instability and inconsistency caused by temperature are perfectly eliminated, and the amplitude and phase stability and amplitude and phase accuracy are greatly improved. The problem that the existing phased array radar cannot respond to the continuous deterioration of the amplitude and phase consistency of the array in real time and quickly due to the lack of calibration function configuration, and it is difficult to ensure the amplitude and phase consistency between the sub-array T / R components is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a principle block diagram of the switching power divider circuit of the present invention; Figure 2 This is a circuit principle block diagram of the transceiver filter module of the present invention; Figure 3 This is a flow chart of the internal standard signal of the receiving subarray of the present invention; Figure 4 This is a flow chart of the internal standard signal of the transmitting subarray of the present invention. DETAILED DESCRIPTION

[0015] The design idea of ​​the present invention is: with the continuous development of phased array radar technology, the requirements for the amplitude and phase consistency of the array are getting higher and higher, and then the requirements for the receiving amplitude and phase consistency and the transmitting phase consistency of the components are also getting higher and higher; in view of the problems that the amplitude and phase calibration of the old radars is not real-time, the amplitude and phase stability is poor, and the current phased array radar cannot perform amplitude and phase calibration operations, it is urgent to find corresponding innovative means to solve the above problems. Therefore, the design of the present invention provides a real-time monitoring method for the microwave channel of this digital T / R component; the circuit design of the present invention is to add a corresponding power division network and a switch power divider on the basis of the original circuit design, and the switch power divider includes a power divider and an electronic switch matrix for the test signal. The test signal received at the CSIN input end of the switch power divider is divided into n paths by the power divider of the test signal, and then respectively cut into n monitoring signals with the n transmission coupling signals sent by the analog T / R component through the electronic switch matrix and sent to the transceiver filter module; the circuit design is simple, reliable, real-time, and versatile, and meets the calibration requirements of the amplitude and phase consistency of various sub-array-level digital array radars.

[0016] The following is a further detailed description of the implementation method of the real-time monitoring and calibration method of the microwave channel of the digital T / R component in conjunction with the accompanying drawings (see Figure 1 to Figure 4 ): A real-time monitoring and calibration method for a microwave channel of a digital T / R component is implemented by including a switch power divider and a transceiver filter module; the characteristics are: the switch power divider is mainly composed of a power divider of a test signal and an electronic switch matrix; the transceiver filter module is mainly composed of a receiving channel, a transmitting channel and a monitoring channel.

[0017] In the receiving working state, the receiving signal is input through the echo input port JSin of the transceiver filter module, and after low-noise amplification, band-pass filtering, frequency selection filtering, variable gain amplification, and low-pass filtering, it is switched to the AD port through switch K4 for AD sampling, or switched to the JC port to complete the receiving signal performance index test through the instrument; in the receiving test state, the test signal 1 is input through the switch power divider test signal input port CSIN, and then enters the transceiver filter module through the monitoring signal port LSin, and is cut into the receiving channel through switches K1 and K2. After completing the same channel processing as the receiving signal, it is switched to the AD port through switch K4 for AD sampling, or switched to the JC port to complete the test signal 1 performance index test through the instrument.

[0018] In the transmitting working state, the transmitting excitation signal enters the transceiver filter module through the excitation input port JLin, and after bandpass filtering, amplification, frequency selection filtering, amplification, and low-pass filtering, it is output to the external port of the digital T / R component through the excitation output port JLout. The transmitting coupling signal is input through the transmitting coupling port OHIN of the switch power divider, and then enters the transceiver filter module through the monitoring signal port LSin, cuts into the transmitting coupling channel through switches K2 and K3, and cuts to the AD port for AD sampling through switch K4, or cuts to the JC port to complete the transmitting coupling signal performance index test through the instrument; in the transmitting test state, the test signal 2 is input through the test signal input port CSIN of the switch power divider, and then enters the transceiver filter module through the monitoring signal port LSin, cuts into the transmitting coupling channel through switches K2 and K3, and cuts to the AD port for AD sampling through switch K4, or cuts to the JC port to complete the test signal 2 performance index test through the instrument.

[0019] The switch power divider is mainly composed of a power divider for test signals and an electronic switch matrix, which completes the power division of the test signal and the switching function of the test signal and the transmission coupling signal; the test signal is power-divided into n paths according to the design requirements of the sub-array channel, and then respectively enters n electronic switches for signal switching with the n transmission coupling signals input by the analog T / R component, forming a total of n monitoring signals; the working state of the electronic switch matrix switches the selected path arbitrarily according to the amplitude and phase calibration requirements; the n electronic switches are all high-isolation switches K401 of Nanjing Guobo Company, with an isolation of ≥50dB, so as to prevent the leakage power of the test signal and the transmission coupling signal from being too large to the The co-frequency influence is generated on each other, resulting in the deterioration of amplitude and phase stability; according to the calibration requirements, the test signal generates test signal 1 and test signal 2 in time-sharing according to the calibration timing. Test signal 1 is used for calibration in the receiving subarray, and test signal 2 is used for calibration in the transmitting subarray; when the receiving subarray is calibrated, the main control sends a control instruction to the calibration source, requiring it to only generate test signal 1, so as to avoid the test signal 2 being amplified by the receiving channel and causing channel blocking; when the transmitting subarray is calibrated, the main control sends a control instruction to the calibration source, requiring it to only generate test signal 2, so as to avoid the test signal 1 being amplified by the receiving channel and causing co-frequency interference to the test signal 2; (see Figure 1 ); The transceiver filter module circuit is mainly composed of a transmitting channel, a receiving channel and a monitoring channel. The transmitting channel mainly completes the filtering and amplification function of the input excitation signal through bandpass filtering, amplification, frequency selection filtering and amplification; the receiving channel mainly completes the low-noise amplification, filtering and gain attenuation control function of the received signal through low-noise amplification, bandpass filtering, frequency selection filtering, variable gain amplification and low-pass filtering; the monitoring channel is mainly composed of 4-level electronic switches K1, K2, K3, K4, wherein the electronic switch K1 completes the switching between the echo signal and the test signal in the monitoring signal, the electronic switch K2 completes the switching between whether the test signal in the monitoring signal enters the electronic switch K1 or the transmission coupling signal in the monitoring signal enters the electronic switch K3, and the electronic switch K3 completes the switching between the transmission coupling signal in the monitoring signal and the receiving signal; the electronic switch K4 completes the switching between whether the signal enters the AD port or the JC port; the electronic switches K1, K2, K3, K4 all use the high isolation switch K401 of Nanjing Guobo Company, with an isolation of ≥50dB. At the same time, the receiving channel and the transmitting preamplifier are both equipped with a low-noise broadband amplifier GSL805AD with a shutdown function from Shenzhen Times Express. When the receiving channel is working, the transmitting channel preamplifier is turned off, and when the transmitting channel is working, the receiving channel amplifier is turned off. The frequency selection filter module needs to complete the transceiver switching function, and its transceiver isolation is ≥45dB; (See Figure 2 ).

[0020] During the calibration of the receiving subarray, the amplitude and phase calibration of the receiving channel is completed through component testing, and the amplitude and phase difference between the test signal 1 and the receiving signal is found and stored in the digital T / R component; and the amplitude and phase characteristics of the switching power divider test signal 1 that change with temperature are tested to obtain the amplitude and phase temperature compensation curve of the test signal 1 and store it in the digital T / R component; the test signal 1 is compensated for the amplitude and phase difference between it and the receiving channel and the amplitude and phase temperature compensation curve value of the test signal 1 is called in real time, thereby completing the real-time monitoring function of the receiving amplitude and phase and eliminating the amplitude and phase test error caused by temperature influence; once the amplitude and phase consistency of the test signal 1 exceeds the threshold, the real-time amplitude and phase calibration function of the receiving channel can be realized by performing AD compensation on the test signal 1 area and the receiving working area of ​​the digital T / R component.

[0021] Specifically, during the calibration within the receiving subarray, the hardware design and process selection of the calibration signal within the receiving subarray are mainly completed by the switch power divider and the transceiver filter module; in the receiving working state, the echo signal output by the signal source is firstly split into n paths and fed into the echo input port JSin of the digital T / R component, and the electronic switch in the switch power divider is switched to the transmitting coupling signal port, the electronic switch K1 in the transceiver filter module is switched to the echo input port JSin, K2 is switched to the K3 port, K3 is switched to the receiving signal port, and K4 is switched to the AD port, and then the amplitude and phase data of the receiving channel are acquired through the digital T / R component AD sampling, the amplitude mean between the receiving channels is obtained by calculation, and the phase of the receiving channel is corrected to 0° through AD compensation, and the amplitude is compensated according to the mean value; in the receiving test state, The test signal 1 is fed into the test signal input port CSIN of the digital T / R component through the signal source, the electronic switch in the switch power divider is switched to the test port, the electronic switch K1 in the transceiver filter module is switched to the electronic switch K2, the electronic switch K2 is switched to K1, the states of the electronic switches K3 and K4 are the same as the receiving working state, the amplitude and phase data of the test channel are acquired through the digital T / R component AD sampling, the amplitude and phase difference value between the corrected receiving channel and the corresponding test signal 1 channel is obtained by calculation and stored in the digital T / R component; during the calibration in the receiving subarray, the digital T / R component is in the receiving test state, the main control computer calls the amplitude and phase difference value between the receiving channel and the test signal 1 channel, and compensates for the amplitude and phase value of the test signal 1 channel read in real time by the AD, thereby feeding back the amplitude and phase value of the corrected receiving channel.

[0022] Since the test signal 1 signal channel covers the entire receiving channel except the switch power divider, the impact of the test signal 1 channel changing with temperature represents the impact of the entire receiving channel changing with temperature.

[0023] The amplitude and phase characteristics of the test signal in the switching power divider that change with temperature are tested and the amplitude and phase compensation curve is obtained and stored in the digital T / R component. The digital T / R component compensates the amplitude and phase of the test signal 1 in real time according to the feedback temperature, thereby avoiding errors in the received amplitude and phase due to the influence of temperature on the switching power divider. When the amplitude and phase consistency of the test signal 1 exceeds the threshold value, the real-time calibration function of the amplitude and phase of the receiving channel can be realized by performing AD sampling compensation on the test signal 1 area and the receiving working area of ​​the digital T / R component, thereby solving the influence of temperature on the amplitude and phase of the receiving channel and improving the stability of the amplitude and phase of the receiving channel.

[0024] In order to ensure the amplitude and phase consistency between T / R components, the control signal source generates a pulse modulation signal through the external trigger synchronization square wave sent by the digital T / R component, and clears the starting phase in each pulse, so as to avoid the influence of AD sampling on the amplitude and phase consistency due to incoherence and inconsistent starting phase; (see Figure 3 ).

[0025] The test internal standard signal is mainly used for transmitting internal calibration. The test internal standard signal is mainly completed by the switch power divider and the transceiver filter module to complete the hardware design and process selection of the test internal standard signal; in the transmitting working state, the test signal 2 is fed to the digital T / R component transmitting coupling signal input port OHIN through the signal source, the electronic switch in the switch power divider is switched to the transmitting coupling signal port, the electronic switch K1 in the transceiver filter module is switched to the echo input port JSin, the electronic switch K2 is switched to K3, the electronic switch K3 is switched to K2, and the electronic switch K4 is switched to the AD port. The acquisition of the amplitude and phase data of the transmitting coupling channel is completed through the digital T / R component AD sampling, the amplitude mean between the transmitting coupling channels is obtained by calculation, and the phases of the transmitting coupling channels are all repaired to 0° through AD compensation, and the amplitude is compensated and corrected according to the mean.

[0026] In the transmitting test state, the test signal 2 is supplied to the test signal input port CSIN of the digital T / R component through the signal source, the electronic switch in the switch power divider is switched to the test port, the electronic switch K1 in the transceiver filter module is switched to the echo input port JSin, the electronic switch K2 is switched to K3, the electronic switch K3 is switched to K2, and the electronic switch K4 is switched to the AD port. The amplitude and phase data of the test signal 2 channel are acquired through the digital T / R component AD sampling, and the amplitude and phase difference between the corrected transmitting coupling channel and the corresponding test signal 2 channel is obtained by calculation and stored in the digital T / R component.

[0027] During the calibration within the transmitting subarray, the amplitude and phase calibration of the transmitting coupling channel is completed through component testing, and the amplitude and phase difference between the test signal 2 and the transmitting coupling signal is found and stored in the digital T / R component; and by testing the amplitude and phase characteristics of the switching power divider test signal 2 and the transmitting coupling signal with temperature, the amplitude and phase temperature compensation curves of the test signal 2 and the transmitting coupling signal are obtained and stored in the digital T / R component respectively; the test signal 2 is compensated for the amplitude and phase difference between it and the transmitting coupling channel, and the test signal 2 and the transmitting coupling amplitude and phase temperature compensation curve values ​​are called in real time, thereby completing the real-time monitoring function of the amplitude and phase of the transmitting coupling signal and eliminating the amplitude and phase test errors caused by temperature influences; once the amplitude and phase consistency of the test signal 2 exceeds the threshold, the real-time amplitude and phase calibration function of the transmitting coupling channel can be realized by performing AD compensation on the test signal 2 area and the transmitting coupling working area of ​​the digital T / R component.

[0028] Specifically, during the calibration within the transmitting subarray, the digital T / R component is in the transmitting test state, the main control computer calls the amplitude and phase difference between the transmitting coupling channel and the test signal channel 2, and compensates for the amplitude and phase value of the test signal channel 2 read in real time by the AD, thereby feeding back the amplitude and phase value of the corrected transmitting coupling channel.

[0029] Since the test signal 2 signal channel covers the entire transmission coupling channel except the switch power divider, the impact of the test signal 2 channel changing with temperature represents the impact of the entire transmission coupling channel changing with temperature.

[0030] The amplitude and phase characteristics of the test signal and the transmission coupling signal in the switching power divider that change with temperature are tested to obtain two sets of amplitude and phase compensation curves that are stored in the digital T / R component. The digital T / R component compensates the amplitude and phase of the test signal 2 and the transmission coupling signal in real time according to the feedback temperature, thereby avoiding errors in the transmission amplitude and phase caused by the influence of temperature on the switching power divider. When the amplitude and phase consistency of the test signal 2 exceeds the threshold value, the real-time calibration function of the amplitude and phase of the transmission coupling channel can be realized by performing AD compensation on the test signal 2 area and the transmission coupling area of ​​the digital T / R component, thereby solving the influence of temperature on the amplitude and phase of the transmission coupling channel and improving the stability of the amplitude and phase of the transmission coupling channel.

[0031] In order to ensure the amplitude and phase consistency between T / R components, the processing measures for the signal source are the same as those for the calibration in the receiving subarray; that is, the transmitting signal source is controlled to generate a pulse modulation signal through the external trigger synchronous square wave sent by the digital T / R component, and the starting phase in each pulse is cleared to avoid the influence of the amplitude and phase consistency caused by the incoherent AD sampling and inconsistent starting phase (see Figure 4 ).

[0032] The workflow of the real-time monitoring and correction method of the microwave channel of the digital T / R component is as follows: In the receiving working state, the receiving signal is input through the echo input port JSin of the transceiver filter module, and after low-noise amplification, band-pass filtering, frequency selection filtering, variable gain amplification, and low-pass filtering, it is switched to the AD port through switch K4 for AD sampling, or switched to the JC port to complete the receiving signal performance index test through the instrument; in the receiving test state, the test signal 1 is input through the switch power divider test signal input port CSIN, and then enters the transceiver filter module through the monitoring signal port LSin, and is cut into the receiving channel through the electronic switches K1 and K2. After completing the same channel processing as the receiving signal, it is switched to the AD port through switch K4 for AD sampling, or switched to the JC port to complete the test signal 1 performance index test through the instrument.

[0033] In the transmitting working state, the transmitting excitation signal enters the transceiver filter module through the excitation input port JLin, and after bandpass filtering, amplification, frequency selection filtering, amplification, and low-pass filtering, it is output to the external port of the digital T / R component through the excitation output port JLout. The transmitting coupling signal is input through the transmitting coupling port OHIN of the switch power divider, and then enters the transceiver filter module through the monitoring signal port LSin, cuts into the transmitting coupling channel through the electronic switches K2 and K3, and is cut to the AD port for A / D sampling through the electronic switch K4, or cuts to the JC port to complete the transmitting coupling signal performance index test through the instrument; in the transmitting test state, the test signal 2 is input through the test signal input port CSIN of the switch power divider, and then enters the transceiver filter module through the monitoring signal port LSin, cuts into the transmitting coupling channel through the electronic switches K2 and K3, and is cut to the AD port for AD sampling through the electronic switch K4, or is cut to the JC port to complete the test signal 2 performance index test through the instrument.

[0034] The above description is only a preferred embodiment of the present invention. The above examples do not impose any form of limitation on the essential content of the present invention. Any simple modification or deformation made by ordinary technicians in the technical field to the above specific implementation methods based on the technical essence of the present invention after reading this specification, as well as equivalent embodiments that may be changed or modified to equivalent changes using the technical content disclosed above, still fall within the scope of the technical solution of the present invention without departing from the essence and scope of the present invention.

Claims

1. A real-time monitoring method for a microwave channel of a digital T / R component, comprising a switch power divider and a transceiver filter module; characterized in that: The switch power divider is mainly composed of a power divider for the test signal and an electronic switch matrix, which completes the power division of the test signal and the switching function between the test signal and the transmission coupling signal; the power divider divides the test signal into n paths according to the design requirements of the subarray channel, and then respectively switches the signal with the n transmission coupling signals input by the analog T / R components into the n electronic switches of the electronic switch matrix to form n monitoring signals; The working state of the electronic switch matrix switches the selected path arbitrarily according to the amplitude and phase calibration requirements; The test signal generates test signal 1 and test signal 2 in time-sharing according to the calibration requirements and the calibration timing; the electronic switch matrix includes at least 4 levels of electronic switches K1, K2, K3, and K4; The transceiver filtering module is mainly composed of a receiving channel, a transmitting channel and a monitoring channel. The receiving channel includes a calibration state within the receiving subarray, a receiving test state, an amplitude and phase consistency state between the receiving signal source and the subarray digital T / R component, a real-time amplitude and phase compensation state for the test signal 1 due to temperature changes, and a receiving working state; the transmitting channel includes a calibration state within the transmitting subarray, a transmitting test state, an amplitude and phase consistency state between the transmitting signal source and the subarray digital T / R component, a real-time amplitude and phase compensation state for the test signal 2 due to temperature changes, and a transmitting working state; the monitoring channel is mainly composed of an electronic switch matrix, wherein the electronic switch K1 completes the switching of the echo signal and the test signal in the monitoring signal; The electronic switch K2 completes the switching of whether the test signal in the monitoring signal enters the electronic switch K1 or the transmission coupling signal in the monitoring signal enters the electronic switch K3; The electronic switch K3 completes the switching between the transmission coupling signal and the receiving signal in the monitoring signal; The electronic switch K4 completes the switching of the corresponding signal into the AD port or the JC port; During the calibration in the receiving subarray, the digital T / R component is in the receiving test state, the main control computer calls the amplitude and phase difference between the receiving channel and the test signal channel 1, and compensates the amplitude and phase value of the test signal channel 1 read in real time by AD sampling, thereby feeding back the amplitude and phase value of the corrected receiving channel; When the amplitude and phase consistency of the test signal 1 exceeds the threshold value, AD compensation is performed on the digital T / R component test signal 1 area and the receiving working area, and finally the real-time amplitude and phase calibration function of the receiving channel is realized; During the calibration in the transmitting subarray, the digital T / R component is in the transmitting test state, the main control computer calls the amplitude and phase difference between the transmitting coupling channel and the test signal channel 2, and compensates the amplitude and phase value of the test signal channel 2 read in real time by the AD, thereby feeding back the amplitude and phase value of the corrected transmitting coupling channel; When the amplitude and phase consistency of the test signal 2 exceeds the threshold value, AD compensation is performed on the digital T / R component test signal 1 area and the receiving working area, and finally the real-time amplitude and phase calibration function of the transmitting channel is realized.

2. A digital T / R component microwave channel real-time monitoring and calibration method according to claim 1, characterized in that: In the receiving test state, the test signal 1 is input through the test signal input port CSIN of the switch power divider, and then enters the transceiver filter module through the monitoring signal port LSin, and is cut into the receiving channel through the electronic switches K1 and K2 in the transceiver filter module. After completing the processing of the same channel as the received signal, it is cut to the AD port through the electronic switch K4 for AD sampling, and the acquisition of the amplitude and phase data of the test channel is completed through the digital T / R component AD sampling. The amplitude and phase difference value of the corrected receiving channel and the corresponding test signal 1 channel is obtained by calculation and stored in the digital T / R component; or it is cut to the JC port through the electronic switch K4 and the performance index test of the test signal 1 is completed through the instrument.

3. A digital T / R component microwave channel real-time monitoring and calibration method according to claim 1, characterized in that: In the transmission test state, the test signal 2 is input through the test signal input port CSIN of the switch power divider, and then enters the transceiver filter module through the monitoring signal port LSin, and is cut into the transmission coupling channel through the electronic switches K2 and K3 in the transceiver filter module, and is cut to the AD port through the electronic switch K4 for AD sampling. The acquisition of the amplitude and phase data of the test channel is completed through the digital T / R component AD sampling, and the amplitude and phase difference value between the corrected transmission coupling channel and the corresponding test signal 2 channel is obtained by calculation and stored in the digital T / R component; or it is cut to the JC port to complete the performance index test of the test signal 2 through the instrument.

4. A digital T / R component microwave channel real-time monitoring and calibration method according to claim 1, characterized in that: The amplitude and phase consistency state between the receiving signal source and the sub-array digital T / R components is achieved by generating a pulse modulation signal of the receiving signal source through an externally triggered synchronous square wave sent by the digital T / R component, and clearing the starting phase in each pulse to avoid the influence on the amplitude and phase consistency caused by AD sampling incoherence and inconsistent starting phases, thereby effectively ensuring the amplitude and phase consistency between the sub-array T / R components.

5. A digital T / R component microwave channel real-time monitoring and calibration method according to claim 1, characterized in that: The amplitude and phase consistency state between the transmitting signal source and the sub-array digital T / R components is achieved by generating a pulse modulation signal of the transmitting signal source through an externally triggered synchronous square wave sent by the digital T / R component, and clearing the starting phase in each pulse to avoid the influence on the amplitude and phase consistency caused by AD sampling incoherence and inconsistent starting phases, thereby effectively ensuring the amplitude and phase consistency between the sub-array T / R components.

6. A digital T / R component microwave channel real-time monitoring and calibration method according to claim 1, characterized in that: The real-time compensation state of the amplitude and phase of the test signal 1 due to temperature changes, the amplitude and phase characteristics of the test signal 1 in the switching power divider that change with temperature, and the amplitude and phase compensation curves obtained through testing are stored in the digital T / R component. The digital T / R component performs real-time compensation for the amplitude and phase of the test signal 1 according to the feedback temperature, effectively avoiding errors in the received amplitude and phase caused by the influence of temperature on the switching power divider.

7. A digital T / R component microwave channel real-time monitoring and calibration method according to claim 1, characterized in that: The real-time compensation state of the amplitude and phase of the test signal 2 due to temperature change is described. The amplitude and phase characteristics of the test signal 2 and the transmission coupled signal change with temperature in the switching power divider. Two sets of amplitude and phase compensation curves are obtained through testing and stored in the digital T / R component. The digital T / R component performs real-time compensation for the amplitude and phase of the test signal 2 and the transmission coupled signal according to the feedback temperature, effectively avoiding errors in the transmission amplitude and phase caused by the influence of temperature on the switching power divider.

8. A digital T / R component microwave channel real-time monitoring and calibration method according to claim 1, characterized in that: The switch power divider comprises a test signal power divider and an electronic switch matrix. The test signal received at the CSIN input end of the switch power divider is split into n paths by the test signal power divider, and then respectively combined with the n-path transmission coupling signals sent by the analog T / R component through the electronic switch matrix to form n-path monitoring signals and sent to the transceiver filter module.

9. A digital T / R component microwave channel real-time monitoring and calibration method according to claim 1, characterized in that: The transceiver filtering module described above receives the echo signal from the JSin input terminal of the receiving link through the electronic switch K1, and then receives the signal through low noise amplifier, bandpass filtering, frequency selection filtering and other receiving processes, and then cuts the monitoring signal input from the LSin input terminal of the electronic switch K3 and the electronic switch K2 into one signal and sends it to the electronic switch K4, which sends the signal to the AD port or the JC port after the switching action; the excitation signal received from the JLin input terminal of the transmitting link is subjected to transmission processing such as bandpass filtering, amplification, frequency selection filtering, etc., and then outputs the excitation signal through the JLout output port.

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