Design of a Dual Layer, Via-free, Polarization-rotating Metasurface with Wideband Asymmetric Transmission

Techniques for adjusting and controlling the polarization state of electromagnetic waves are of great importance in the optical and microwave regimes. In this letter, a dual-layer, via-free, polarization-rotating metasurface with wideband and effective asymmetric transmission properties is presented. Numerical and experimental results show that the metasurface can rotate the polarization of the incident electromagnetic wave by 90°, from 24.5 to approximately 30.9 GHz (relative bandwidth 23.10%). The simple structure and good performance of the proposed metasurface make it a promising candidate in quasimillimeter wave radar and communication applications and can be easily scaled to other frequency bands.