AP0994 Advanced Metasurface Engineering for Broadband Applications of Enhanced Angle-Insensitive Conversion: The Cross-Polarization

Abstract

A novel reflective metasurface designed for cross-polarization conversion (CPC) in the microwave frequency range is presented in this work.  A split-ring resonator with a circular metallic outer ring and an embedded inner square ring is incorporated into each of the unit cells that make up the suggested layout. This structural configuration enables the transformation of both linearly and circularly polarized waves into their orthogonal counterparts upon reflection. A significant advancement in our design is the incorporation of four distinct plasmonic resonances, which play a crucial role in achieving an efficient and wideband CPC effect. As a result, the proposed metasurface achieves a fractional bandwidth of 72% with a -3 dB conversion efficiency, spanning frequencies from 1 GHz to 15 GHz. The proposed metasurface demonstrates the promising possibility of a large group of practical applications in polarization control devices, representing a significant advancement in microwave engineering and metamaterials.