Abstract: In this paper, firstly, the mathematical character of Noise FM jamming is discussed which is the main form of suppresion jamming. Secondly, the influences of Noise FM jamming on phased array radar are presented in terms of narrowband self-defence distance, wide-band imaging to find weakness of anti-jamming for radar. At last, according to present document, the method of anti-jamming for phased array radar is simulated to test its performances.

Key words: Noise FM jaming, Antijamming, Phased array radar