A Hybrid Calibration Method for Aperture Synthesis Radiometers


The calibration of aperture synthesis radiometers (ASRs) with large arrays by internal noise injection suffers from high increased mass and volume and is not capable to deal with the out-of-plane distortion of antenna arrays. In this letter, a hybrid calibration methodology is proposed, that combines the redundant baselines and reduced noise injection. The hybrid technique wants solely a little noise injection network and can pander to the out-of-plane distortion of antenna arrays. The performance of the hybrid methodology depends on the noise injection part distribution, that is analyzed and given primarily based on minimizing the foundation mean sq. of all residual amplitude and phase errors. Simulation results demonstrate its performance. The proposed hybrid technique is significantly helpful to the calibration of ASRs with large arrays in geostationary orbit.

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