A novel symmetric ELC resonator for polarization-independent and highly efficient electromagnetic energy harvesting

摘要

Recently electromagnetic (EM) energy harvesting using metasurfaces has gained a great attention. This letter presents a polarization-independent metasurface harvester composed of an ensemble of novel electric-inductive-capacitive (ELC) resonators. The introduced ELC resonator has a full level of symmetry in a way that its behavior is very insensitive to the polarization of the incident wave. Loading the resonators with resistors (which model the input impedance of a rectifying circuit in a harvesting system), it is shown that the metasurface perfectly absorbs the incident EM wave (regardless of its polarization) and perfectly delivers the absorbed power to the loads.