A self-closed-loop calibration method for eliminating short-term burst interference signals

Abstract

A self-closed-loop calibration method for eliminating short-term burst interference signals proposed by the present invention aims to provide a method that can effectively eliminate the influence of short-term burst interference, ensure that the amplitude and phase test data are accurate and reliable, and improve the accuracy of phased array antennas in short-term The method of the calibration success rate under the sudden interference environment. The present invention is realized through the following technical solutions: the calibration receiver performs down-conversion on the signal returned by the antenna under test, sends the generated intermediate frequency signal to the calibration signal processing unit, and according to the in-phase component and positive signal obtained by sampling and digital quadrature demodulation Calculate the amplitude value of the measured signal and the signal-to-noise ratio SNR, and compare the signal-to-noise ratio SNR with the preset decision threshold SNR th Make a comparison to judge whether the signal-to-noise ratio of the tested signal meets the requirements, until the amplitude and phase tests of the required N states are completed to obtain the amplitude and phase test data; then calculate the feed amplitude and phase distribution according to the obtained amplitude and phase test data, and apply the calibration The results are evaluated to determine whether the convergence requirements are met.

Description

technical field [0001] The invention relates to phased array antenna monitoring and calibration technology, in particular to a phased array antenna self-closed-loop calibration method in the environment of eliminating burst interference. Background technique [0002] The phased array antenna is an array antenna composed of multiple radiating elements. Due to various reasons, such as component performance degradation or damage, there are amplitude and phase errors in each element of the antenna in the phased array, which will seriously affect Antenna lobe performance. Therefore, there must be corresponding means to monitor and correct the amplitude and phase of each antenna unit on a regular basis or in real time. The performance of phased array antennas is largely affected by element failures and errors. The addition of active components increases the failure rate, which, combined with manufacturing tolerances and mechanical deformation of the transmission lines, phase shi...

AI Technical Summary

Problems solved by technology

The disadvantage of the above-mentioned existing calibration methods is that they do not consider the impact of the short-term burst interference signal on the calibration process, resulting in a low success rate of equipment calibration in the interference environment, and in serious cases, the calibration cannot even be completed, which will seriously affect the equipment. The efficiency of maintenance and support is unacceptable during the use of equipment

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