Simple Metal-Only 1-Bit Coding Metasurface for RCS Reduction

1-bit coding metasurfaces, which combine two basic unit cells with out-of-phase responses, have shown significant potential for achieving diffuse scattering, making them valuable for radar signature control. This paper presents a simple metal-only unit cell to design metasurfaces for radar cross-section reduction. The various steps of designing this unit cell are outlined. The recently introduced Minimum Peak Sidelobes codes in the field of coding metasurfaces, associated with the metal-only unit cell, are being utilized to validate their diffusion capabilities through electromagnetic simulations. The results are compared to those obtained with an analytical approach. To enhance performance and align more closely with the analytical approach, modifications to the unit cell are presented, which involve adding rooftops.