Single Layer Metasurface Design for Wideband RCS Reduction Using Polarization Conversion

In this paper, single dielectric layer 1-bit coding metasurfaces based on cross polarization conversion for wideband RCS reduction is presented. A unit cell with wideband cross polarization conversion was used to compose the proposed metasurfaces. The periodicity of the unit cell used was P = 0.32λ and the polarization conversion ratio (PCR) of the unit cell was more than 97.3%. The unit cell and its mirrored one were used to represent the ‘1’ and ‘0’ coding bits, respectively. Three 1-bit metasurfaces were designed each containing 16 × 16 unit cells and the dimensions are 80 mm × 80 mm. It is shown that the proposed metasurfaces can significantly reduce the backscattering and RCS to more than 10 dB from 13.1 GHz to 25.7 GHz, RCS reduction factional bandwidth is 64.9%.