A Chessboard Metasurface With Multimode RCSR Based on Reconfigurable Polarization Converter

A reconfigurable polarization converter (RPC) consisting of an asymmetrical Jerusalem Cross incorporated with two p-i-ns, an air space, and a metal ground is proposed. The active design enables the structure to convert an incident linearly polarized wave to its orthogonal counterpart from 2.93 to 7.79 GHz when the p-i-ns are switched ON, and by flipping the working state of p-i-ns, high-efficiency reflection is achieved in the frequency range of 2–6.78 GHz. Afterward, the designed RPCs are arranged in chessboard form to achieve multimode radar cross section reduction (RCSR) including high-efficiency reflection, 10 dB RCSR, half-size reflection, and their combined modes for different polarized normal incidence. Simulations are carried out to verify the design scheme, and measurements are performed on a fabricated prototype to validate the multimode RCSR design in broadband.