Phased-array antenna calibration method, system and device and storage medium

Abstract

The invention provides a phased-array antenna calibration method, which comprises the following steps of: calibrating the amplitude phase of an antenna through near-field calibration; calibrating left and right rotation amplitudes of the antenna based on a far-field environment; and carrying out complete machine polarization calibration based on a far-field environment. The method has the advantages that firstly, the far-field calibration environment is constructed through the far-field condition provided by the satellite channel, and the far-field test environment adopts a satellite as a transmitting end, so that the test environment is greatly simplified, and the construction of the test environment is facilitated; a satellite is adopted as a transmitting end in a far-field test environment, so that the test environment is greatly simplified, and the test environment can be built. Aiming at the requirement of high polarization isolation in satellite communication, the calibration precision is improved by adopting amplitude and phase coarse calibration of a far field and amplitude and polarization calibration of the far field, and high polarization isolation can be obtained.

Description

technical field [0001] The invention relates to the technical field of phased array satellite antenna calibration, in particular to a phased array antenna calibration method, system, equipment and storage medium. Background technique [0002] Since each channel of the phased array antenna passes through a different radio frequency circuit, each channel has an uncertain amplitude and phase deviation. It is necessary to calibrate the amplitude and phase during the production process. The accuracy of the calibration determines the performance of the antenna, including the main Lobe gain, side lobe characteristics and antenna polarization characteristics, etc. [0003] For the phase calibration of phased array satellite communication antennas, far-field calibration and near-field calibration methods are generally used; the far-field calibration method has the problems of large space occupation, complex system and low efficiency; the pure near-field calibration method is efficien...

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Problems solved by technology

[0003] For the phase calibration of phased array satellite communication antennas, far-field calibration and near-field calibration methods are generally used; the far-field calibration method has the problems of large space occupation, complex system and low efficiency; the pure near-field calibration method has high efficiency , but there is a problem of large amplitude and phase calibration errors. Phased array satellite communication antenna systems often use dual circular polarization or dual linear polarization to synthesize arbitrary linear polarization. Satellite communication requires high polarization isolation. Calibration accuracy cannot meet the requirements

[0004] The invention patent application with the publication number CN102544771A discloses a comprehensive real-time calibration method for a multi-channel anti-jamming antenna system, and proposes to solve the incompleteness of multi-channel digital anti-jamming system calibration by combining far-field calibration and near-field calibration. This method is not suitable for the calibration needs of phased array antennas

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