Design of a Loop Resonator with Improved Power Transmission Efficiency Using a Ferrite Plate


We propose a novel resonator that can reduce magnetic field leakage using a ferrite plate. The proposed resonator consists of a rectangular loop, a ferrite plate, and an L-matching network. The ferrite plate is used as an H-field reflector to direct more H-field to each resonator, and the L-matching network is employed to match the 50 Ω of the feed cable at 13.56 MHz. Two identical resonators with dimensions of 30 cm × 15 cm are separated by 50 cm, and the resulting transmission efficiency is about ?12.3 dB at 13.56 MHz. This is about 4.2 dB higher than the resonators without the ferrite plate.

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G. Byun, S. Ji, B. Jang, C. Seo and H. Choo, "Design of a Loop Resonator with Improved Power Transmission Efficiency Using a Ferrite Plate," Journal of Electromagnetic Analysis and Applications, Vol. 5 No. 5, 2013, pp. 196-200. doi: 10.4236/jemaa.2013.55031.

Conflicts of Interest

The authors declare no conflicts of interest.


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