Compact wearable meta materials antennas for energy harvesting systems, medical and IOT systems

Abstract

Demand for green technologies and green energy is in continuous growth in the last decade. Compact effcient radiators are very important for energy harvesting portable systems. Small antennas have low effciency. The effciency of communication and energy harvesting systems may increase by using effcient passive and active antennas. The system dynamic range may be improved by connecting amplifiers to the printed antenna feed line. Design, design considerations, computed and measured results of wearable meta-materials antennas with high effciency for energy harvesting applications are presented in this paper. The antennas electrical parameters on human body were analyzed by using commercial full-wave software. The wearable antennas are compact and flexible and are 1.6 mm thick. The directivity and gain of the antennas with Split-ring resonators (SRR), is higher by 2 dB to 3 dB than the antennas without SRR. The resonant frequency of the antennas without SRR is higher by 5% to 10% than the antennas with SRR. © 2019 by the author.