Broadband linear to circular polarization reflector using modified metasurface

A broadband linear to circular polarization reflector is proposed. To suppress the radiation from surface wave (SW), four corners of the square metasurface (MS) reflector is removed. By this modification, the 3-dB axial ratio (AR) bandwidth of 27% can be obtained at the center frequency of 8.8 GHz. In this paper, the detail discussion about the principle of SW resonance suppression and the guideline to design finite metasurface are presented.