Wideband frequency selective absorber with high‐selective reflective‐band for RCS reduction applications

Abstract

This article presents a wideband frequency selective absorber with a high selective reflective‐band for RCS reduction application. The proposed design consists of three metallic layers. With lossy resonance of the resistors‐loaded folded loop at the front layer, wide absorption performance is obtained. Then two independently lossless resonances are employed to introducing a flexible and high selective reflective‐band with full reflectance into the absorption band. The resultant absorbers have the thickness of only ~0.076 λL at the lowest operating frequencies and exhibit a whole operating bands of 126.3%. Two absorption band with bandwidth of 60.3% and 44.5% have been achieved. A prototype of the proposed structure has been fabricated, whose measured results show reasonable agreement with the simulated responses under normal incidence.

An Ultrathin Wideband Microwave Metamaterial Absorber Based on Frequency Selective Surface

“…[ 16–28 ] Now more designs tend to be developed on the basis of the Salisbury Screen by adding resistance patches to the periodic metal structure of the absorber structure. [ 29–43 ] Actually, this structure has the advantage of large absorption bandwidth, but the thickness of structure is often relatively large and the manufacturing process involved is also complex.…”