A Homogenized Magnetic Metasurface for Misalignment Robustness Enhancement in Wireless Power Transfer

In this paper, we introduce the adoption of a magnetic metasurface whose response is opportunely controlled as a method to alleviate the misalignment issue in resonant inductive Wireless Power Transfer. In particular, we first present the analytical framework thanks to which the metasurface response can be homogenized, avoiding undesired truncation effects. Then, a numerical set-up is designed to demonstrate the validity of the proposed approach. The results obtained through accurate full-wave simulations show that a homogenized metasurface can outperform a traditional one in terms of misalignment robustness, while maintaining the same efficiency level. This work can pave the way to the adoption in WPT applications of response-controlled metasurfaces with respect to the traditional version.