An improved high angular resolution method by using four-channel jointed monopulse radar

Abstract

Custom monolulse radar has capability to measure the elavation and azimuth angles, and the angular resolution capibility depends on width of antenna beam, so it can't distinguish two or mutiple targets in main beam. In order to improve the angular resolution of custom monupulse radar, a novel system structure of monopulse radar is proposed in this paper, and a new solutin to resolve the angle using a mono pulse of four channels is presented. This new method skillfully chooses and uses the received signal of diagnol difference channel, and it can simultaneously derive two targets' two-dimension angular information at main beam during one measuring process, so the new method can distinctly improve the angular resolution capability. The algorithm is simple and easy to carry out, and its stability is very good on the condition of different SNR and different return power ratio. Numerical simulations have demonstrated the effectiveness of the approach proposed.