Circular polarizer using frequency selective surfaces

摘要

A circular polarizer (CP) includes an electrically insulating or semiconducting and optically transparent layer having a frequency selective surface (FSS) disposed thereon, the FSS includes a periodic array of electrically conductive spirals. For reflection mode operation, an electrically conducting substrate or ground plane layer preferably having a thickness of approximately one-quarter wave at the nominal design wavelength is disposed beneath the optically transparent layer.