Methods of APAA phase-amplitude characteristics measurements automation

摘要

This paper presents methods of phase-amplitude automatic measuring for multichannel APAA. The form of the far-field pattern (width, main-lobe position, side lobe amplitude) directly correlates with amplitude-phase distribution. Modern APAA contains a large number of channels (tens, hundreds), which makes automatic measuring of phase-amplitude characteristics relevant. Testing equipment that was developed during this study allows measuring amplitude-phase distribution of the channels and at the same time the fidelity of phase set on each phaseshifter. The study shows the results of implementation of automatic measurement system on the transmit part of 5-channel air-guidance APAA.