A novel method to reduce reflections effects in an anechoic chamber during antenna group delay measurement

Abstract

The antenna group delay measurements methods accuracy is limited by remained reflections in an anechoic chamber. A novel method based on a linear approximation of the group delay in dependence on the distance between the antennas to reduce measurements error. The method is based on the fact that the group delay depends linearly on the distance between the antennas and the interference caused by residual reflections is periodic in nature. The developed method in comparison with the previously used method of measuring the delay at a fixed distance allowed to increase the measurement accuracy by more than 6 times.