High Efficient Low profile Metasurface for RF Energy Harvesting

In this article, a simple low-profile metasurface based RF energy harvester (MSEH) in microwave region is proposed. The unit cell structure consists of a metallic circular ring with two rectangular patches that can exhibits an electromagnetic (EM) wave absorptivity greater than $\mathbf{9 9 \%}$. The AC energy of each cell is pooled through the load resistance of $130 \Omega$ connected with via where efficiency is achieved up to 98.12% at 4.6 GHz. Simulation results are optimized at 4.6 GHz with different parameters. The performance of the proposed device is angularly stable up to $\mathbf{4 0}$ degree. The proposed device can be used for different application such as in radar, satellite, and wireless communication.