A Novel Approach for Passive Jamming of Netted Radar Based on Luneburg Lens‐Metasurface System

A passive jamming strategy against netted radar systems is proposed in this study, leveraging a Luneburg lens integrated with a conformal partitioned and dynamically tunable metasurface. Unlike conventional phase‐switched screens (PSS), which are typically planar and limited in angular coverage, the proposed system combines the wide‐angle beam‐focusing capability of a Luneburg lens with a reconfigurable partitioned metasurface embedded on its focal surface. This configuration enables effective radar cross‐section (RCS) manipulation and deception jamming across multiple angles. By incorporating PIN diodes controlled via bias voltage, the metasurface dynamically tailors its reflection properties, achieving real‐time RCS modulation with a depth exceeding 15 dBsm over a broad bandwidth and wide angular range. Furthermore, diverse time‐modulation schemes—including fast‐time, slow‐time, and pseudo‐random sequences—are employed to generate false targets and disrupt radar imaging processes. Experimental results demonstrate effective RCS regulation and imaging interference within a ±55° azimuth range. Additionally, by selectively activating different partitions of the conformal metasurface with customized signals, simultaneous multi‑zone RCS control and temporal phase modulation are achieved under detection from different sites of a netted radar system within ±25°. This work provides a practical and efficient solution for passive jamming in sophisticated multi‑radar environments.