A Periodic Array of Metasurface with Random or Quasi-Random Shapes for Low Scattering Performance

In this paper, in contrast to the scattering cancellation method, the metasurface diffusion surfaces are designed to minimize the backscatter energy from the metal surface by using different periodic unit cells with random or quasi-random geometries and chessboard-like configurations. Based on the diffusion property, two-dimensional metasurface (MS) unit cells are engineered to have broadband efficient reflection phases ( 180°±37°). In addition, metamaterial unit cells operate at different frequencies, allowing such a diffusion metasurface surface to work properly over a wide bandwidth. As a result, the total reflected power is averaged into several reflected beams, thus further dramatically reduce the backscatter energy of the metal surface. The performance of the simulated models is effectively validated. These techniques offer excellent potential for applications with low scattering and low observability platforms.