A Triple-Band Ultra-Thin Metamaterial Absorber for Radar Cross-Section Reduction

摘要

We present a simple design and simulation of a triple-band ultra-thin metamaterial absorber (MMA) using subwavelength unit cell in multilayer technology. A desirable absorption with three resonance peaks is achieved through the synergetic effects of Ohmic loss and Fabry-Perot interference. The advantages of the absorber are the small overall thickness (~ λ/20 with respect to the middle absorption peak of 11.15 GHz), the absence of a metallic backing plate and its wide-angle good performance. By exploiting the scalability property of MMAs, we investigate the possibility of independently controlling the frequency of the absorption peaks. Radar Cross Section (RCS) reduction compared to a PEC surface is demonstrated by calculating the bistatic RCS of a metallic cube covered by the proposed MMA. Our design can have potential applications in detection, sensing and stealth technology.