Mitigation of antenna test range impairments caused by presence of undesirable emitters

摘要

An antenna test range uses direct spread-spectrum based test signals to test the performance of an antenna. Since a spread spectrum waveform has high autocorrelation properties with itself and high cross-correlation properties with signals other than itself, in the receiver coupled to the antenna it is possible to effectively electronically reject all unwanted signals that may be present in the test range, and thereby allow both main beam and off-axis performance of the antenna to be completely and accurately measured.