A Wide Band Reflective Linear to Circular Polarization Converting Metasurface

This paper presents a novel, compact single-layer reflective metasurface designed for wideband linear-to-circular (LTC) polarization conversion. Simulations are carried and the results demonstrate that the proposed metasurface can achieve LTC polarization conversion spanning from 12 GHz to 26 GHz, with a bandwidth (BW) of 14 GHz and a fractional bandwidth (FBW, which is defined as the ratio between the maximum, minimum and central frequency within the operating band) of 74%. The axial ratio (AR) of the metasurface remains below 3 dB within the FBW. Furthermore, the polarization conversion ratio (PCR) of the LTC polarization converter reaches 99% within the specified operating band.