Efficient Circular Polarized Metamaterial RF Energy Harvester for Wi-Fi Applications

TL;DR

This paper introduces a multilayer metamaterial electromagnetic energy harvester with circular polarization capability, operating efficiently at Wi-Fi frequencies, demonstrating high efficiency, angle insensitivity, and suitability for harvesting Wi-Fi signals.

Contribution

It presents a novel multilayer circular polarized metamaterial harvester based on spiral split ring resonators for Wi-Fi energy harvesting.

Findings

Efficiency greater than 90% at Wi-Fi frequencies

Angle insensitivity up to 44 degrees

Capable of absorbing circular polarized waves

Abstract

A new metamaterial based, circular polarized electromagnetic energy harvester is presented in this work. The structure, which is multilayer and utilises the well-known to the literature geometry of the spiral split ring resonator, operates at the Wi-Fi frequency band. Based on full electromagnetic analysis, the proposed harvester presents high efficiency (i.e., greater than 90%), adequate angle insensitivity (i.e., 44 deg.) and it is capable of absorbing circular polarised plane waves.