Low-Cost Air Gap Metasurface Structure for High Absorption Efficiency Energy Harvesting

Wei Hu, Zhao Yang, Fading Zhao, Guangjun Wen, Jian Li, Yongjun Huang, Daniele Inserra, Zhizhang (David) Chen
2019 International Journal of Antennas and Propagation  
This manuscript deals with the design of a metamaterial-based surface structure for high efficiency wireless power harvesting or collection. Differently from the previously presented structures which require the use of thicker and low-loss (and for this reason high cost) dielectric substrates, the presented work employs a dual-layer structure with a thin low-loss material and an air gap; they allow for the design of very high absorption efficiency metamaterial-based surfaces, with noticeably
more » ... with noticeably reduced costs. Furthermore, the air gap thickness can be used as a new degree-of-freedom (more easily adjustable than the thickness of a single-layer structure) for the optimization of other design requirements such as bandwidth or structure sizes. In comparison with other existing designs, the proposed metasurface shows a comparable absorption efficiency of 84.4% but with a larger power collection surface and lower costs.
doi:10.1155/2019/1727619 fatcat:m2s5cc3ztjb6jljg5kwmsnlt5m