Millimeter Wave Band Left Hand Circular Polarization to Right Hand Circular Polarization Convertor Based on Multilayer Meta-surface

Millimeter wave circularly polarized antenna has the characteristics of reducing polarization mismatch and suppressing multipath interference, and has better stability in harsh environment, which is an important device to improve the performance of communication system, and the related radome also plays an increasingly important role. In this work, we present a multilayer metasurface, which can convert left hand circularly polarized electromagnetic waves into right hand circularly polarized waves. Simulation shows that such metasurface exhibits axle ratio $< 2$ and insertion loss $< 2\mathbf{dB}$ within ± 60° oblique angle incidence in the 30 - 40 GHz.