Application Of Indefinite Magnetic Metamaterial In Wireless Power Transfer

Using metamaterials in magnetically coupled resonace wireless power transfer system can achieve higher system efficiency,wider working range and other effects.The external electromagnetic properties of the metamaterials with specific structures can be characterized by their equivalent geometric dimensions and equivalent electromagnetic parameters based on the equivalent media theory.Studying the effect of the equivalent geometric dimensions and equivalent electromagnetic parameters on the wireless power transfer is the base of properly using metamaterial to improve the performance of the system.In this paper,firstly,the effects of the equivalent geometric and electromagnetic parameters of metamaterial lens on wireless power transfer efficiency are explored by means of numerical simulation.Then,the applications of small size and large size indefinite magnetic metamaterial lenses in wireless power transfer are developed.In the end,the special field distribution in the process of lens applications is analyzed,and the concept of metamaterial lens resonator is proposed,and the analytical solution is obtained to guide the design of metamaterial resonator.The small size application of indefinite magnetic metamaterial lens can solve the problem that the conventional lens size is too large to be assembled.The large size application of indefinite magnetic metamaterial lens can solve the problem that the system efficiency is sensitive to the lateral displacement of receiving end relative to the transmitting end.These two applications can be explained by the theory of the metamaterial lens resonator that both of them are the result of ultilizing the characteristics of metamaterial lens resonator.