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http://dx.doi.org/10.5515/JKIEES.2010.10.4.219

Wireless Power Transmission between Two Metamaterial-Inspired Loops at 300 MHz  

Kim, Gun-Young (Department of Electronics and Radio Engineering, Kyung Hee University)
Jung, Youn-Kwon (Department of Electronics and Radio Engineering, Kyung Hee University)
Lee, Bom-Son (Department of Electronics and Radio Engineering, Kyung Hee University)
Publication Information
Journal of electromagnetic engineering and science / v.10, no.4, 2010 , pp. 219-223 More about this Journal
Abstract
Based on a provided closed-form wireless power transmission (WPT) efficiency formula, which may be used for any value of load, we have analyzed the WPT efficiencies between two metamaterial-inspired loop antennas in various aspects. Due to the modeling based on low frequency circuit theory, the provided formula at the center resonant frequency has been found to be accurate until when the distance between the two loop antennas increases to 15 cm (about $\lambda_0/6$ at 300 MHz). When the two loops get closer, the resonant frequency has been found to split into two in theory, simulations, and measurements. The EM-simulated and measured efficiencies at new resonant frequencies are 60.9 % and 46.3 %, respectively, at d=15 cm. With two extra rings around the loops, the maximum efficiency is enhanced to 93.7 % at d=15 cm. The effect of the additional two rings is about 30 %.
Keywords
Wireless Power Transmission (WPT); Metamaterial; Loop Antenna; Efficiency;
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1 T. -G. Kim, B. Lee, "Modeling and analysis of radiation effects for one-dimensional metamaterial-based transmission lines," IET Microw. Antennas Propag., vol. 4, iss. 3, pp. 287-295, 2010.   DOI   ScienceOn
2 Ikuo Awai, "New expressions for coupling coefficient between resonators," IEICE Trans. Electron., E88-C, no. 12, pp. 2295-2301, Dec. 2005.   DOI
3 RongLin Li, Nathan A. Bushyager, Joy Laskar, and Manos M. Tentzeris, "Determination of reactance loading for circularly polarized circular loop antennas with a uniform traveling-wave current distribution," IEEE Trans. Antennas Propag., vol. 53, no. 12, pp. 3920-3929, Dec. 2005.   DOI   ScienceOn
4 Youn-Kwon Jung, Bomson Lee, "Capacitively loaded loop antenna fed by wideband metamaterial balun," Proc. Int. Symp. on AP-S, pp. 1-4, Jun. 2009.
5 Ikuo Awai, Tetsuya Ishida, and Yangjun Zhang, "Efficient time domain calculus of microwave resonator parameters," 2006 APMC Proc., pp. 773-776, Dec. 2006.
6 N. Tesla, U.S. patent 1, 119, 732, 1914.
7 . Kurs, A. Karalis, R. Moffatt, J. D. Joannopoulos, P. Fisher, and M. Solacic, "Wireless power transfer via strongly coupled magnetic resonances," Science, vol. 317, pp. 83-86, Jul. 2007.   DOI   ScienceOn
8 H. Haus, Waves and Fields in Optoelectronics, Prentice Hall, Englewood Cliffs, NJ., 1984.
9 G. V. Eleftheriades, A. K. Iyer, and P. C. Kremer, "Planar negative refractive index media using periodically L-C loaded transmission lines," IEEE Trans. Microwave Theory and Tech., vol. 50, no. 12, pp. 2702-2172, Dec. 2002.   DOI   ScienceOn
10 A. Sanada, C. Caloz, and T. Itoh, "Planar distributed structures with negative refractive index," IEEE Trans. Microw. Theory Tech., vol. 52, no. 4, pp. 1252-1263, Apr. 2004.   DOI   ScienceOn