Dual polarized metasurface for microwave energy harvesting and wireless power transfer

We introduce the design of a dual polarized metasurface collector based on the metamaterial full absorption concept for electromagnetic energy harvesting. Different from previous metamaterial absorber designs, here the power absorbed is mostly dissipated across a resistive load rather than in the dielectric substrate. This is achieved by channeling the absorbed power to an optimal resistive load through a via hole. The simulation results show that power absorption efficiency of 98% is achieved at an operating frequency of 2.5 GHz for a single unit cell. A super unit cell consisting of 4 cells with alternating vias was also designed to produce a dual polarized metasurface. The simulation results yielded a radiation to AC efficiency of around 90% for each polarization.