Mitigating of received signal power loss caused by multipath effect in phased array radars

Abstract

The author presents a method to mitigate received signal power loss in presence of the multipath effect. The method is dedicated to phased array radars. It is based on the observation that signal amplitudes from various antenna elements may significantly vary between each other in the multipath scenario and uses beamforming with modified weights adjusted to these amplitudes. As a result, the improvement of Signal-to-Noise Ratio of 2–3 dB is possible to obtain. The results of the method were based on simulations performed. Moreover, a negative impact on the antenna receiving pattern and sensitivity to changes in surface reflection coefficient has been discussed.