TITLE:
Design of a Loop Resonator with Improved Power Transmission Efficiency Using a Ferrite Plate
AUTHORS:
Gangil Byun, Sunghwan Ji, Byungjun Jang, Chulhun Seo, Hosung Choo
KEYWORDS:
Ferrite Plate; Loop Resonator; Wireless Power Transmission
JOURNAL NAME:
Journal of Electromagnetic Analysis and Applications,
Vol.5 No.5,
May
20,
2013
ABSTRACT:
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.