Abstract
Historically, the frequency selective surfaces (FSS) evolved from the investigation of diffraction gratings in optics. At the operating frequency of the enclosed antenna, the FSS is fully transparent, while for out‐of‐band frequency, the FSS is fully reflective or absorptive. FSS structures can be used as polarizers for different incident angles transforming linear polarization into circular polarization or rotating the incident linear polarization. This chapter describes the scattering analysis of a planar FSS using its integral equation formulated with Floquet harmonics and numerically solved with MoM. It extends the scattering analysis to multilayer FSS structures. The chapter describes metamaterials applications for radome's through an example of a radome, which allows transmission and reception of an enclosed antenna in the pass‐band and absorbs the electromagnetic energy out of the pass‐band. It shows the geometry of an FSS with conductive elements arranged in a rectangular grid with the unit cell dimensions.
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