An optimized coding polarization conversion metasurface with a transmission window for RCS reduction

Abstract

A polarization conversion metasurface capable of simultaneously realizing RCS reduction and wave transmission is coding optimized in this paper. RCS reduction is realized by polarization conversion, and a bandpass frequency selective surface (FSS) is employed to obtain a transmission window. Meanwhile, coding optimization based on polarization conversion metasurface is employed to achieve a more uniform far-field distribution. Simulation results show that the proposed metasurface can achieve more than 10 dB RCS reduction within 5.56–19.07 GHz, while exhibiting efficient transmission performance with an insertion loss (IL) of under 1 dB around 3.08 GHz. Experimental results are in good agreement with simulations, validating the proposed metasurface’s wideband RCS reduction capability and high-efficiency transmission characteristics. Our proposed coding polarization conversion metasurface provides a potential application for the integration of low-RCS radar stealth and wireless communication.