Broadband Linear to Circular Reflection Polarization Converter

A broadband linear to circular polarization converting surface is presented. The polarization reflector consists of a dogbone-shaped FSS separated from the metallic ground plane by a Teflon dielectric slab of thickness equal to 3.95 mm. The polarization converter is composed by a periodic arrangement of metallic particles, positioned in a square lattice with a periodicity D = 5 mm. The surface provides an efficient conversion from linear to circular polarization in the frequency band spanning from 9.45 GHz to 21.1 GHz thus obtaining a relative bandwidth of 76.2 %.