Stray signals suppression in far field antenna measurement range

摘要

There are several approaches of verifying and improving the antenna measurement accuracy in near- and far-field ranges. Additional measurements and a proper post processing of the measured data can be used for improving the measurement accuracy. A few of the methods have been elaborated in that concern: a) De-convolution, b) Time-domain gating, c) Reflection suppression (pattern oversampling), d) Pattern comparison, in which a few measured patterns are then superimposed and averaged, etc. An advantage of the proposed method is that unlike the “traditional” pattern comparison method, in which for stray signal depression at far-field angles the exact locations of the antenna are required, here only 3 equidistant locations are sufficient for suppression of any stray signal incident from arbitrary directions.