Broadband and wide-angle RCS reduction based on an optimal-arranged metasurface

An optimal-arranged metasurface for broadband and wide-angle RCS reduction is proposed in this paper. To avoid directed scattering beams caused by the chessboard-like metasurface, the optimal arrangement for diffusion effect is searched out using genetic optimization algorithm. Furthermore, the proposed metasurface can obtain a wider 10-dB RCS reduction band which ranges from 5.16 GHz -7.94GHz (42.3% relative bandwidth) compared with the chessboard which ranges from 5.92GHz-6.1GHz (3.0% relative bandwidth). The scattering performances for the oblique incidence are also investigated in the full wave simulation, in which a more than 6-dB bistatic RCS reduction can be achieved from 5.14GHz-7.82GHz for both horizontal and vertical polarizations.