Improving the efficiency of wireless power transfer systems using metamaterials

Abstract

The investigation of applying metamaterials in the efficiency enhancement for wireless power transfer (WPT) systems is presented in this paper. Three types of metamaterials are considered: the double negative material (DNG), the isotropic μ-negative material (IMNG), and the anisotropic μ-negative material (AMNG). Through the transmission analysis, it is found that evanescent wave components are amplified by the metamaterial slabs, and the amplification is the highest for AMNG due to the presence of resonances. Numerical simulations show that a threefold enhancement in efficiency can be achieved when an AMNG slab is used in the WPT system.