Abstract:Jamming effect evaluation is an important method on judging and comparing with jamming methods. Based on analysis of sinusoidal frequency modulation and sawtooth frequency modulation jamming to SAR, it is obtained that the two methods can both produce mantle style and spot noise style jamming, which makes the jamming effect evaluation on the two jamming methods more difficult. Therefore two pertinent methods are adopted to make the evaluation more exact. The quantitative analysis of jamming effect evaluation is executed through the simulation.