High efficiency and triple-band metamaterial electromagnetic energy hervester

This work describes and proposes a new triple-band (GSM 900, DCS 1800, WiFi), highly efficient metamaterial harvester that is capable to operate in wide angles of plane wave incidence. The energy harvesting structure consists of a conventional metamaterial electric resonator, which employs a via that channels all the absorbed RF power to a resistive load. The latter represents the input impendance of a RF-to-DC rectifier. The metamaterial harvester is analyzed in terms of absorbance, power efficiency and power losses mechanism for normal as well as for wide angle incidence. The assets of the proposed model, could be proven to be potentially instructive for various electromagnetic RF energy harvesting configurations.