Ultrawideband Radar Cross-Section Reduction by a Metasurface Based on Defect Lattices and Multiwave Destructive Interference

Abstract

Wide-band stealth technology is important for many wave-based applications, particularly involving radar, but is held back because expanding bandwidth for radar cross-section reduction is extremely difficult for traditional phase-cancellation methods. This study develops a physical mechanism for multiwave destructive interference (MWDI), and presents a metasurface with variable layer thickness and engineered defect configuration. This unconventional metamaterial harnesses second destructive interference to break the current bandwidth constraints in radar stealth applications.