Demonstration Of Wideband Polarization Conversion Using Novel Reflective Metasurfaces

This paper presents the study of a reflection-type polarization rotator realized by a single layer metasurface deposited on a metallic ground plane. The metasurface consists of an array of three planar metal patches with two neighboring Plasmonic resonant frequencies. The structure is designed, simulated, and the fabricated prototype is experimentally characterized. It converts indifferently, a linearly polarized (CoPol) plane wave into an orthogonal cross-polarization (X-Pol). A high Polarization Conversion Ratio, PCR above 80% is achieved over a bandwidth (2.8 GHz) from 7.5 GHz to 10.3 GHz and a relative insensitivity to the incidence angle $(0^{\circ} -\pm 45^{\circ})$. The experimental results are in good agreement with the numerical simulations.