CN-122017761-A - Time control array radar and built-in self-checking calibration method thereof

CN122017761ACN 122017761 ACN122017761 ACN 122017761ACN-122017761-A

Abstract

The invention provides a time control array radar and an in-plane self-checking calibration method thereof, and belongs to the technical field of array radar performance detection. The time control array radar comprises a self-checking calibration control module, a plurality of parallel subarray modules and a plurality of parallel subarray preprocessing modules, wherein the built-in self-checking calibration method of the time control array radar adopts the self-checking calibration control module, can rapidly and accurately detect the time delay consistency and amplitude consistency of each receiving and transmitting channel and each subarray preprocessing module in a receiving/transmitting mode, and also ensures that the self-checking calibration of each channel and each module is not influenced by each other through the high isolation performance of the multi-level switch, and improves the precision and stability of the self-checking calibration, thereby ensuring the normal work of the time control array radar.

Inventors

LV BO

Assignees

北京宏动科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260210

Claims (7)

1. The time control array radar is characterized by comprising a self-checking calibration control module, a plurality of parallel subarray modules and a plurality of parallel subarray preprocessing modules; The self-checking calibration control module is used for in-machine self-checking calibration of a time-controlled array radar, and comprises an up-down conversion module, a switch sub-module, a coupler sub-module and a signal processing sub-module, wherein the up-down conversion module comprises a mixer, a first digital-to-analog converter and a first analog-to-digital converter which are electrically connected with the mixer respectively, the switch sub-module comprises a receiving-transmitting self-checking selection switch, a self-checking position selection switch, a sub-module selection switch, a receiving-transmitting assembly selection switch and a channel selection switch, the coupler sub-module comprises a plurality of first self-checking calibration couplers and a plurality of second self-checking calibration couplers, the signal processing sub-module is used for carrying out self-checking calibration on the sub-module and the sub-array preprocessing module, the first digital-to-analog converter is electrically connected with the signal processing sub-module, the mixer is electrically connected with the receiving-transmitting self-checking selection switch and the self-checking position selection switch in sequence, the self-checking position selection switch is connected with the receiving-checking module selection switch respectively, the self-checking calibration sub-module comprises a plurality of self-checking calibration couplers, the first self-checking calibration couplers and the self-checking calibration couplers, and the self-checking calibration modules are electrically connected with the self-checking calibration modules respectively, and the self-checking calibration modules respectively. The plurality of parallel subarray modules are used for receiving and/or transmitting ultra-wideband pulse signals; for each subarray module in the subarray modules, the subarray module is electrically connected with one subarray pretreatment module, the subarray module comprises a parallel combiner/divider and a plurality of transceiver components, for each transceiver component in the transceiver components, the transceiver component comprises a plurality of transceiver channels which are parallel, for each transceiver channel in the transceiver channels, one end of the transceiver channel is electrically connected with the first self-checking calibration coupler, and the other end of the transceiver channel is electrically connected with the combiner/divider; The sub-array preprocessing modules are used for processing the ultra-wideband pulse signals, each sub-array preprocessing module in the sub-array preprocessing modules is electrically connected with one second self-checking calibration coupler, the sub-array preprocessing modules are further provided with a second digital-to-analog converter and a second analog-to-digital converter, and the second digital-to-analog converter and the second analog-to-digital converter are electrically connected with the signal processing sub-module.
2. The radar according to claim 1, wherein, For each of the plurality of transceiving channels, the transceiving channel comprises a first transceiving switch, a receiving sub-channel, a transmitting sub-channel and a second transceiving switch which are electrically connected in sequence, the first transceiving switch is provided with a first port, a second port and a third port, the first port of the first transceiving switch is electrically connected with the first self-checking calibration coupler, the second port of the first transceiving switch is electrically connected with one end of the receiving sub-channel, the third port of the first transceiving switch is electrically connected with one end of the transmitting sub-channel, the second transceiving switch is provided with a first port, a second port and a third port, the first port of the second transceiving switch is electrically connected with the other end of the receiving sub-channel, the second port of the second transceiving switch is electrically connected with the other end of the transmitting sub-channel, the third port of the second transceiving switch is electrically connected with a delay device and an attenuator in sequence, and the attenuator is electrically connected with the combiner/splitter.
3. The radar according to claim 2, wherein, The receiving sub-channel comprises a receiving low-noise amplifier and a first band-pass filter which are electrically connected in sequence; the transmitting sub-channel comprises a transmitting amplifying circuit and a second band-pass filter which are electrically connected in sequence.
4. The radar according to claim 1, wherein, The signal processing submodule comprises an embedded processor and an upper computer which are electrically connected in sequence; The embedded processor is electrically connected with the first digital-to-analog converter, the first analog-to-digital converter, the second digital-to-analog converter and the second analog-to-digital converter.
5. An in-flight self-test calibration method for a clocked array radar as claimed in claim 1, comprising: determining the type of built-in self-checking calibration of the time-controlled array radar by adopting a signal processing sub-module, wherein the type of built-in self-checking calibration comprises the transmission self-checking calibration of a receiving and transmitting channel, the receiving self-checking calibration of the receiving and transmitting channel, the transmission self-checking calibration of a subarray preprocessing module and the receiving self-checking calibration of a subarray preprocessing module; Selecting a detection component and a working state corresponding to the type of the built-in self-checking calibration through the switch submodule, wherein the detection component is a receiving-transmitting channel or a subarray preprocessing module, and the working state is transmitting or receiving; acquiring a transmitted/received signal by adopting a first self-checking calibration coupler/a second self-checking calibration coupler corresponding to the detection component and the working state, and outputting the transmitted/received signal to the signal processing submodule through a first digital-to-analog converter/a first analog-to-digital converter; The signal processing submodule compares the amplitude consistency and the delay consistency of the transmitted/received signals output by the first digital-to-analog converter/the first analog-to-digital converter with the transmitted/received signals output by the second digital-to-analog converter and the second analog-to-digital converter, and adjusts the detection part according to the comparison result so as to realize the built-in self-checking calibration of the time control array radar.
6. The method for self-test calibration in a machine according to claim 5, wherein, When the type of the built-in self-checking calibration is the transmitting/receiving self-checking calibration of a receiving and transmitting channel, the process of the built-in self-checking calibration of the time control array radar is as follows: The signal processing sub-module sets the working mode of the sub-array preprocessing module and the working mode of the sub-array module as transmitting/receiving modes, switches the receiving and transmitting self-checking selection switch to a transmitting up-conversion/receiving down-conversion state, switches the self-checking position selection switch to a receiving and transmitting assembly self-checking calibration state, adopts the receiving and transmitting assembly selection switch to select a corresponding receiving and transmitting assembly, and adopts the channel selection switch to select a corresponding self-checking receiving and transmitting channel; A first self-checking calibration coupler electrically connected with the self-checking receiving and transmitting channel acquires an ultra-wideband pulse signal transmitted/received by the self-checking receiving and transmitting channel, and the ultra-wideband pulse signal is transmitted to the signal processing submodule through the first analog-to-digital converter/first digital-to-analog converter after up-conversion/down-conversion and amplification are realized by the channel selection switch, the receiving and transmitting component selection switch, the self-checking position selection switch and the mixer; The signal processing sub-module compares the amplitude consistency and the delay consistency of the ultra-wideband pulse signals transmitted by the first analog-to-digital converter/the first digital-to-analog converter with those of the ultra-wideband pulse signals transmitted by the second digital-to-analog converter/the second analog-to-digital converter to obtain a comparison result of the ultra-wideband pulse signals transmitted by the first analog-to-digital converter/the first digital-to-analog converter, and adjusts the self-checking receiving and transmitting channel according to the comparison result to realize the built-in self-checking calibration of the time control array radar.
7. The method for self-test calibration in a machine according to claim 5, wherein, When the type of the built-in self-checking calibration is the transmitting/receiving self-checking calibration of the subarray preprocessing module, the process of the built-in self-checking calibration of the time control array radar is as follows: The signal processing sub-module is used for powering off all sub-modules, switching the receiving and transmitting self-checking selection switch to a transmitting up-conversion/receiving down-conversion state, switching the self-checking position selection switch to a sub-array preprocessing module self-checking calibration state, and selecting a corresponding self-checking signal processing sub-module by adopting the sub-array module selection switch; the second digital-to-analog converter electrically connected with the self-checking signal processing sub-module transmits a self-checking waveform, and the self-checking waveform is transmitted to the signal processing sub-module through the first analog-to-digital converter/first digital-to-analog converter after up-conversion/down-conversion and amplification are realized by the self-checking signal processing sub-module, a second self-checking calibration coupler electrically connected with the self-checking signal processing sub-module, the sub-module selection switch, the self-checking position selection switch, the receiving-transmitting self-checking selection switch and the mixer; The signal processing sub-module compares the amplitude consistency and the delay consistency of the ultra-wideband pulse signal transmitted by the first analog-to-digital converter/the first digital-to-analog converter with the self-test waveform transmitted by the second digital-to-analog converter/the second analog-to-digital converter to obtain a comparison result of the ultra-wideband pulse signal transmitted by the first analog-to-digital converter/the first digital-to-analog converter, and adjusts the self-test signal processing sub-module according to the comparison result to realize the built-in self-test calibration of the time control array radar.

Description

Time control array radar and built-in self-checking calibration method thereof Technical Field The invention relates to the technical field of array radar performance detection, in particular to a time control array radar and an in-plane self-checking calibration method thereof. Background The array radar is a radar capable of realizing flexible beam control and has strong airspace anti-interference capability. The amplitude consistency and the delay consistency among all the components in the array radar are required to be provided so as to ensure the normal beam forming and scanning of the phased array radar, and the amplitude consistency and the delay consistency among all the components in the array radar are usually checked through the built-in self-checking calibration in the prior art so as to ensure the normal work of the array radar. The time control array radar is a novel array radar which realizes beam scanning, shaping and signal processing by controlling the opening and closing time of a signal receiving and transmitting channel, and at present, a built-in self-checking calibration method for the time control array radar is lacking, so that the normal work of the time control array radar cannot be ensured. Disclosure of Invention The invention provides a time control array radar and an in-plane self-checking calibration method thereof, which can realize in-plane self-checking calibration of the time control array radar, thereby ensuring the normal work of the time control array radar. In order to achieve the above purpose, the invention adopts the following technical scheme: In a first aspect, the invention provides a time-controlled array radar which comprises a self-checking calibration control module, a plurality of parallel subarray modules and a plurality of parallel subarray preprocessing modules. The self-checking calibration control module is used for in-plane self-checking calibration of the time-controlled array radar, the self-checking calibration control module comprises an up-down frequency conversion module, a switch sub-module, a coupler sub-module and a signal processing sub-module, the up-down frequency conversion module comprises a mixer, a first digital-to-analog converter and a first analog-to-digital converter which are electrically connected with the mixer respectively, the switch sub-module comprises a receiving-transmitting self-checking selection switch, a self-checking position selection switch, a sub-array module selection switch, a receiving-transmitting assembly selection switch and a channel selection switch, the coupler sub-module comprises a plurality of first self-checking calibration couplers and a plurality of second self-checking calibration couplers, the signal processing sub-module is used for carrying out self-checking calibration on the sub-array module and the sub-array preprocessing module, the first digital-to-analog converter and the first analog-digital converter are electrically connected with the signal processing sub-module respectively, the mixer is electrically connected with the receiving-transmitting self-checking selection switch and the self-checking position selection switch respectively, the self-checking position selection switch is electrically connected with the sub-array module selection switch, the plurality of first self-checking calibration couplers are electrically connected with the channel selection switch respectively, and the second self-checking calibration couplers are electrically connected with the sub-checking calibration couplers. The sub-array module comprises a sub-array module, a receiving-transmitting assembly and an antenna, wherein the sub-array module is used for receiving and/or transmitting ultra-wideband pulse signals, the sub-array module is electrically connected with a sub-array preprocessing module for each sub-array module, the sub-array module comprises a combiner/divider and a plurality of receiving-transmitting assemblies which are arranged in parallel, the receiving-transmitting assembly comprises a plurality of receiving-transmitting channels which are arranged in parallel for each receiving-transmitting assembly, one end of each receiving-transmitting channel is electrically connected with a first self-checking calibration coupler, the other end of each receiving-transmitting channel is electrically connected with the combiner/divider, and the first self-checking calibration coupler is also electrically connected with the antenna. The sub-array preprocessing modules are used for processing the ultra-wideband pulse signals, each sub-array preprocessing module in the sub-array preprocessing modules is electrically connected with a second self-checking calibration coupler, the sub-array preprocessing modules are also provided with a second digital-to-analog converter and a second analog-to-digital converter, and the second digital-to-analog converter and the second analog-to-digital converter are electri