SAR Deceptive Jamming Method Based on Phase Gradient Modulation

Time-varying metasurface has attracted extensive attention in recent years because of its modulation ability to wireless communication signals. In principle, phase modulation alters the interpulse characteristics of the original signal and fundamentally interferes with the processing of the radar signal. In this article, a synthetic aperture radar (SAR) camouflage approach is presented by modulating the phase of reflection radar signal based on the phase gradient modulation. The intrapulse phase modulation is applied to alter the target position in range domain, and the interpulse phase modulation is applied to alter the target position in azimuth domain. Through the derivation formula and simulation experiment, the camouflage effect under phase modulation is verified.