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J. Electromagn. Eng. Sci > Volume 15(3); 2015 > Article
Journal of Electromagnetic Engineering and Science 2015;15(3):194-198.
DOI: https://doi.org/10.5515/JKIEES.2015.15.3.194   
Omnidirectional Resonator in X-Y Plane Using a Crisscross Structure for Wireless Power Transfer
Donggeon Kim1, Chulhun Seo2
1Department of Electronic Engineering, Soongsil University
2Soongsil University
Magnetic resonant coupling is more efficient than inductive coupling for transferring power wirelessly over a distance. However, a conventional resonant wireless power transfer (WPT) system requires a transmitter and receiver pair in exactly coaxial positions. We propose a resonator that can serve as an omnidirectional WPT system. A magnetic field will be generated by the current flowed through the transmitter. This magnetic field radiates omnidirectionally in the x-y plane because of the crisscross structure characteristic of the transmitter. The proposed resonator is demonstrated by using a single port. To check the received S21 and transfer efficiency, we moved the receiver around the transmitter at different distances (50-350 mm). As a result, the transmission efficiency is found to be 48%-54% at 200 mm.
Key words: Crisscross Structure, Omnidirectional Resonator in X-Y Plane, Resonant Coupling, Transfer Efficiency, Wireless Power Transfer


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