Anti-Radar Blinking Stealth Technology Based on Reconfigurable Intelligent Surface

Advanced radar techniques (e.g., pulse compression and coherent integration) pose significant challenges for target stealth in complex electromagnetic environments. We propose a blinking stealth method based on a phase-switched reconfigurable intelligent surface (PS‑RIS), which modulates the radar echo through tailored temporal phase sequencing. By applying a tailored time-sequence modulation, the PS-RIS dynamically combines echoes from distinct phase states through weighted temporal superposition, thereby suppressing overall echo amplitude and rendering targets virtually undetectable by radar—all without the need for complex spatial encoding. Through theoretical modeling, numerical simulations, and field experiments, we demonstrate complete radar invisibility when duty cycle D = 0.5, phase difference Δφ_r = π, and switching period T_s = 1/B, respectively, and B is the radar bandwidth. This algorithm-level countermeasure establishes a new paradigm for active Anti-radar stealth technology.