Cross-Polarization Control in FSSs by Means of an Equivalent Circuit Approach

This paper presents an efficient equivalent circuit approach (ECA), based on a Floquet modal expansion, for the study of co- and cross-polarization in frequency selective surfaces (FSS) formed by periodic arrays patches/apertures either single or stacked configurations. The ECA makes it possible derivation analytical expressions generalized scattering parameters associated with proposed networks. Furthermore, is surrogate model that can be combined optimization techniques artificial intelligence algorithms design FSS structures, saving efforts computation compared to time-consuming full-wave simulators tedious synthesis (simulation-assisted) techniques. Due simplicity topology involved networks, also advantageously used gain physical insight. applied validated different configurations where cross-pol component plays fundamental role design, as circular polarizers, polarization rotators, reflectarray cells.