ENHANCING TRANSFER EFFICIENCY IN MAGNETIC WAVEGUIDES USING METAMATERIAL-BASED WIRELESS POWER TRANSFER

Abstract

In this study, we investigate the wireless power transfer based on the magnetic waveguide, which is created by activating the unit cells on the metamaterial slab. Based on the resonant cavity effect on the activating region on the metasurface, the magnetic field distribution is localized and transferred to the load with minimal losses. As a result, the wireless power transfer system achieves efficiencies of 72.8% and 42.4% at transfer distances of 4 cm and 16 cm, respectively, at frequency of 14,5 MHz. In addition, with the proposed unit cell structure, the wireless energy transfer efficiency is maintained at 42.4% when the energy transfer direction changes by 120°, 180°, and 240° along the x-axis with a magnetic waveguide length of 16 cm on the metasurface. Based on these results, the study demonstrates the potential for real-world applications such as wireless charging paths for electric vehicles, multi-point charging grids, and smart charging tables through controlling the configuration of the magnetic waveguide.