Radar Cross Section Analysis of Multi-Layered Resistive Material based Planar/Conformal Radar Absorbing Structures

Resistive material based radar absorbing structures (RAS) are potential candidates for reducing radar cross-section (RCS) over a broad band of frequencies and wide range of incident angles. The superior performance can be attributed to both dielectric and ohmic losses contributing simultaneously towards power absorption. In this regard, a novel multi-layered resistive material based broadband RAS configuration using commercially available substrates is presented for both planar as well as conformal applications. The monostatic RCS of both planar and conformal RAS has been estimated using full wave simulation software. The computed results clearly indicate that the proposed RAS models provide more than 8dB RCS reduction (RCSR) from 2GHz to 18GHz in comparison with PEC plate of identical dimensions.