Phase-only optimization for the generation of wide deterministic nulls in the radiation pattern of phased arrays

Some analytical and experimental results of the phase-only optimization of each array element for the generation of wide deterministic nulls in the sidelobe region of the radiation pattern of a phased-array antenna are presented. The technique derives from the adaptive null-steering theory and is applied in the radar field to the spatial filtering of strong clutter echoes or jammers. A wide deterministic null has been realized in the elevation pattern of a phased-array antenna, with electronic scanning in elevation, without any hardware change; the calculated performances are compared to the measured data.