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High Efficiency Electromagnetic Energy Harvesting with Metasurface

This manuscript investigates the problem of high efficiency electromagnetic energy harvesting with metasurface. A literature analysis reveals that the most efficient metasurface arrays have been designed with very high cost thick substrate dielectric materials. Materials have been selected to be of low loss (this is the reason of the high cost), and the thickness is usually larger than 3 mm to achieve acceptable impedance matching properties. We propose a structure constituted by a very thin dielectric material (to hold the metasurface) and an air gap to decrease costs and improve efficiency.