Wide-Coverage Suspended Metasurface Energy Harvester for ISM Band Applications

Abstract

A wide-coverage suspended metasurface (MS) electromagnetic (EM) energy harvester for ISM band applications is designed and analyzed. The proposed MS harvester is printed on a thin and low-loss substrate material and suspended with an air gap to increase the efficiency of the MS harvester. At normal-incidence, the proposed MS harvester is achieved a higher absorption response of about 90% across the frequencies from 2.14 GHz to 2.64 GHz. At oblique incidence angles, the AC power efficiency of 93.7%, 77.2% and 64% is achieved at incident angles of 15 o, 30 o and 45 o, respectively.