A Metamaterial-inspired Approach to RF Energy Harvesting

2017/05/07 by Fowler, Clayton, Zhou, Jiangfeng
#Applied Physics (physics.app-ph) #FOS: Physical sciences

paper · doi:10.48550/arxiv.1705.07718

Abstract

We demonstrate an RF energy harvesting rectenna design based on a metamaterial perfect absorber (MPA). With the embedded Schottky diodes, the rectenna converts captured RF waves to DC power. The Fabry-Perot (FP) cavity resonance of the MPA greatly improves the amount of energy captured. Furthermore, the FP resonance exhibits a high Q-factor and significantly increases the voltage across the Schottky diodes, which improves the rectification efficiency, particularly at low power. This leads to factor of 16 improvement of RF-DC conversion efficiency at ambient intensity level.

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