Plasma Passive Jamming for SAR Based on the Resonant Absorption Effect

The resonant absorption effect between plasma and electromagnetic waves makes the plasma a potential efficient passive jamming method for synthetic aperture radar. In this paper, the validity of plasma passive jamming is verified by comparing the echoes with and without plasma. First, the shift operator finite-difference time-domain method is utilized to numerically calculate the echoes from different plasma parameters. Then, the images of point target with and without plasma are obtained and compared. The image of point target with plasma is partly focused and the geometry character of point target is destructed. The simulation and analysis results validate the effectiveness of the proposed plasma passive jamming method.