Resonance and Cross-Polarization Effects in Conventional and Complementary Split Ring Resonator Periodic Screens

The behavior of periodic plane arrays of split ring resonators (SRRs) and of complementary split ring resonators (CSRRs) when they are illuminated by a plane wave is analyzed. The effects of the angle of incidence and polarization are considered. A surface admittance approach is used for the analysis. Experimental results in free space are provided in order to check the theory. Good qualitative agreement is observed between theory and experiment, although some quantitative disagreements still remain and need explanation. Application of the studied devices as frequency selective surfaces and polarization converters can be envisaged as a consequence of the high variety of the reported resonant and cross-polarization effects