Non-uniformly spaced sub-arrayed printed self-tracking reflector antenna

The gain and radiation patterns of a non-uniformly spaced sub-arrayed planar 32-element retrodirective array (RDA) were investigated. The measured monostatic self-tracking reflection capability of the array was better than 3 dB over a range of incident signals of 80/spl deg/, and the gain of the array was found to be 15 dBi.