About the stationary phase points and caustic influence on lateral radiation of antenna systems with radomes

The influence of re-radiations from a radome inner walls on the lateral radiation of an antenna system is studied. The stationary phase point existence that contribute mainly to the energy of re-radiated beams is determined. The localized, point nature of these sources, increasing the lateral radiation, leads to effective approaches to increasing the noise stability of the antenna system. Further, the envelopes coordinates (caustics) and “controlling” beam re-radiations coming from fixed directions are considered