Single screen cross slot polarization convertors with enhanced bandwidth and frequency selective filtering performance

This paper describes a new design strategy which is used to obtain fivefold increase in the 3 dB axial ratio bandwidth of linear circular polarization convertors based on anisotropic frequency selective surfaces composed single screens cross slots. The performance improvement obtained by employing stratified dielectric media carefully tailor shape TE and TM spectral transmission responses. We demonstrate that 24.5% can be achieved at center operating 10.6 GHz using an array unequal length cross-slots embedded centrally between two 2.25 mm thick slabs (?r = 9.0). Moreover it shown inherent self-filtering behavior structure provides greater rejection unwanted signals than designs lower permittivity material. Computed experimental results are compared verify methodology.