Design of a Metasurface Superstrate for Improved Reception of Wireless Power at Ka-Band

We present a metasurface superstrate designed to improve reception of incident waves in far-field wireless power transfer and energy harvesting at Ka-band. The proposed metasurface consists of four metal layers filled with three thin substrates that make up a flat lens to focus incident plane waves. Numerical simulation is performed to verify the proposed metasurface design and its focusing ability.