Optically Transparent and Flexible Metasurface for Wi deb and Cross-Polarization Applications in the V-band

An optically transparent and flexible metasurface is proposed for the V-band applications. The metasurface uses a silver nanowire (AgNW) deposit on a transparent PEN substrate to achieve optical transparency of greater than 85 %. The proposed metasurface exhibits cross polarization conversion in reflection mode from 54.2 GHz to 70.7 GHz with an angularly stable field of view of up to 40°. The metasurface is also capable of dual-band linear-to-circular polarization conversion from 50 GHz to 52.7 GHz and 73.8 GHz to 80.8 GHz. Moreover, a L-blt phase resolution in reflection mode is achieved by 90° rotation of unit cell for cross polarization reflectarray applications. The proposed metasurface is simulated on CST Microwave Studio and features low insertion loss, high return loss, and a wideband polarization conversion ratio (PCR) of better than 90 %, making it a desirable candidate for V-band cross polarization applications.