The effects of magneto-static resonances in metamaterials on the quality factor of coils in near field applications

摘要

In this work we examine the effects of near field metamaterials (NF-MM) on the quality factor (Q) of an excitation (i.e. source) coil. We show that when the permeability becomes negative, magneto-static resonances (MR) occur that are coupled strongly to the excitation coil and increase the loss in the coil. Our simulation and experimental results show that Q can be degraded by a factor of 4 or more due to the MR induced loss in an excitation coil.