Main-lobe jamming suppression for missile-borne phased array high-repetition stepped frequency radar

Aimed at the case of more than one jamming source, a novel method of main-lobe jamming suppression and target angle parameter estimation was presented for missile-borne mono-pulse high-repetition stepped-frequency radar application. In the method, beamforming in modified azimuth-elevation coordinate system was did in order to obtain separable pattern function; eight channels including sum, azimuth-difference, elevation-difference and other auxiliary channels were constructed by using digital processing of sub-array output signals; modified sum channels and modified difference channels were formed by using multi-channel cancellation technology. The method can suppress main-lobe jamming and meanwhile preserve undistorted mono-pulse ratio. Theoretical analysis and simulation results show its effectiveness.