A Dual-Metasurface-Based Imaging Radar Deception Jammer With Angular Adaptability and Scattering Enhancement

In this article, we introduce a dual-metasurface-based imaging radar deception jamming system to address the inherent angular sensitivity of metasurface in radar signal modulation. In this proposed architecture, two metasurfaces are integrated with their respective horn antennas to form the radio frequency (RF) transceiver components responsible for echo modulation. The receiving and transmitting parts are directly connected using a detector and a power amplifier. During regular operation, the metasurface in the receiving portion detects the direction of the radar signal through spatial beam scanning, while the transmitting part metasurface modulates the phase of the radar signal in the temporal dimension, thereby incorporating artificially generated target information into the monostatic echoes. Based on the theoretical analysis, a practical system architecture was constructed, and then, outfield experiments were conducted. The experimental results demonstrate that the proposed jammer is capable of generating multiple artificial targets while concealing the original target in the high-resolution range profile (HRRP) under oblique incidences, thereby confirming the angular adaptability and scattering enhancement of the proposed deception jamming system.