Near field calibration method for active phased array radar antenna

Abstract

The invention discloses a near field calibration method for an active phased array radar antenna. Problems existing in the prior art, such as wide calibration scanning range, low precision, high computational effort and the like, are mainly solved. The near field calibration method comprises the following steps: calibrating channel numbers, and establishing a channel mapping relation; configuringoff-net frequency parameters, and inputting interchannel spacing; sequentially powering up antenna units; setting channel amplitude of the antenna units to be 0 one by one, setting the phase as 0 degree, and setting poles for residual channels of the antenna units; setting the channel amplitude as 0, and setting the phase as 180 degrees; solving first real-time amplitude and a first real-time phase of the channel; setting the channel amplitude as 0, and sequentially setting the phases as K degrees and (180 plus K) degrees, and solving second real-time amplitude and a second real-time phase ofthe channel; reversing the data of the first real-time phase to the channels. The near field calibration method disclosed by the invention has the advantages of high calibration efficiency, low energyconsumption, high precision, less computational effort and the like, and has wide market prospects and popularization value in the technical field of active phased array radar antennas.

Description

technical field [0001] The invention relates to the technical field of active phased array radar antennas, in particular to a near-field calibration method for active phased array radar antennas. Background technique [0002] Phased array radar, that is, phase-controlled electronically scanned array radar, uses a large number of individually controlled small antenna elements arranged into an antenna array, and each antenna element is controlled by an independent switch. The main beams with different phases (directions) can be synthesized by the time difference, and the phase can be changed in both axes. Phased array radar is divided into passive phased array radar and active phased array radar. Active phased array radar is better than passive phased array radar. Phased array radar has the advantages of flexible beam pointing, multiple independent beams can be formed at the same time, large target capacity, strong adaptability, and good anti-interference performance, and is ...

AI Technical Summary

Problems solved by technology

[0005] In view of the above shortcomings, the purpose of the present invention is to provide a method for near-field calibration of an active phased array radar antenna, which mainly solves the problems of large calibration scanning range, large calculation workload, and low calibration accuracy in the prior art.

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