Design of High Efficiency Transmission Antenna at 90 GHz with All Dielectric Metasurface

A high-gain transmission lens antenna is designed with all dielectric phase gradient metasurface at 90 GHz. Our designed dielectric metasurface is first demonstrated by simulation of deflection and focusing, 70% focusing efficiency can be obtained. Then we put a dipole antenna at the focusing point, the spherical wave can be converted to plane wave with the metasurface. The directional radiation performance can be enhanced significantly.