Self-closed calibration method for eliminating short-term burst interference signals

Abstract

The invention provides a self-closed calibration method for eliminating short-term burst interference signals, and aims to provide a method capable of effectively eliminating influences of short-term burst interference, ensuring accurate and reliable amplitude and phase test data and improving the calibration success rate of a phased array antenna in a short-term burst interference environment. The self-closed calibration method is implemented according to technical scheme that a calibration receiver performs down-conversion on signals returned by a tested antenna, sends generated intermediate-frequency signals to a calibration signal processing unit, calculates an amplitude value and a signal-to-noise ratio (SNR) of the tested signals according to in-phase component and quadrature component sampling values acquired by sampling and digital quadrature demodulation, compares the SNR with a preset judgment threshold SNRth to judge whether the signal-to-noise ratio of the tested signals meets requirements or not, and obtains amplitude and phase test data until required amplitude and phase tests of N states are completed; and then amplitude and phase distribution of the feed is calculated according to the obtained amplitude and phase test data, evaluation is performed by applying a calibration result, and whether a convergence requirement is met or not is judged.

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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