Analysis of Magnetically Coupled Wireless Power Transmission Efficiency according to Material

Abstract

This paper presents the analysis of the coupling coefficient(k), Q value of the resonator, and the optimum loaded resistance at Rx for the magnetically coupled wireless power transmission using two loops(resonators). In addition, the metamaterial, conductor, and the relay methods have been used in order to improve the limitation problem of transmission efficiency by using the figure of merit. We have achieved the increase of transmission efficiency about 11～60 % using the proposed methods by analyzing and comparing the results based on EM simulations.