Magnetic Field Enhancement in Wireless Power With Metamaterials and Magnetic Resonant Couplers

We report on the magnetic field and coupling enhancement for increased wireless power transfer (WPT) efficiency using intermediate materials. We examine the physical mechanisms for enhancement using a metamaterial (MM) and magnetic resonant field enhancement (MR-FE) and present an analytical and simulation analysis as well as an experimental study of these enhancement mechanisms. While both increase the mutual coupling, the loss of the contrasting enhancement mechanisms significantly impacts WPT efficiency enhancement. Our analysis shows that the MR-FE approach can have up to a 4-times-higher efficiency over the MM approach due to the lower loss of its field enhancement mechanism.