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J Electromagn Eng Sci > Volume 13(4); 2013 > Article
Journal of Electromagnetic Engineering and Science 2013;13(4):259-262.
DOI: https://doi.org/10.5515/JKIEES.2013.13.4.259   
Analysis of Wireless Power Transfer Using Metamaterial Slabs Made of Ring Resonators at 13.56MHz
TaekKyu Oh, Bomson Lee
Department of Electronics and Radio Engineering, Kyung Hee University
This paper analyzes the effects of metamaterial slabs with negative permeability when applied to a two-loop wireless power transmission (WPT) system, both in theory and electromagnetic (EM) simulations. The analysis of magnetic flux focusing provided here assumes quasi-magnetostatics or magnetostatics. The slab structures with negative permeability have been realized using the periodically arrayed ring resonators (RRs) at 13.36MHz. Some examples with ideal lossless slabs of -1, -2, and -3 showed a great enhancement of WPT efficiencies when compared with the free space cases. However, practical lossy slabs made of planar copper RRs did not show significant enhancement of WPT efficiencies due to the relatively high losses in the ring resonator (or in the slab consisting of RRs) near the resonant frequency.
Key words: Magnetic Flux Focusing, Metamaterial, Negative Permeability, Ring Resonator, Split Ring Resonator


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