Design and Analysis of a Reconfigurable Polarization Conversion Metasurface

Abstract

A novel reconfigurable polarization converter is conferred depending on the PIN diodes controlled metasurface. The developed structure works in between two modes (polarization conversion and no conversion i.e., reflection) by changing the biasing condition of PIN diodes. The proposed structure unit cell is etched on the dielectric substrate with a metallic ground plane which is comprised of a single split rectangle ring resonator, two cut wires. The proposed metasurface can effectively convert a incident Electromagnetic (EM) wave with Linearly polarization (LP) into its orthogonal LP reflection wave in a lower frequency band of 6.66–10.51 GHz with a polarization conversion ratio over 88%, and a Circularly Polarized (CP) reflection wave in a higher frequency band of 12.2–14 GHz with a axial ratio below 3dB during OFF condition of diodes. On the other hand during the ON condition of diodes, the proposed structure exhibits total reflection characteristics over the operating frequency range and behaves like an ideal reflecting metal plate. The proposed metasurface has good potential applications in a linearly and or circularly polarized antenna as a layer superimposed on another, behaves like a reconfigurable polarization of the antenna.