J Electromagn Eng Sci Search

CLOSE


J Electromagn Eng Sci > Volume 13(1); 2013 > Article
Journal of Electromagnetic Engineering and Science 2013;13(1):38-43.
DOI: https://doi.org/10.5515/JKIEES.2013.13.1.38   
Enhancement of Wireless Power Transfer Efficiency Using Higher Order Spherical Modes
Yoon Goo Kim, Jongmin Park, Sangwook Nam
Department of Electrical Engineering and Computer Science, Seoul National University
Abstract
We derive the Z-parameters for the two coupled antennas used for wireless power transfer under the assumption that the antennas are canonical minimum scattering antennas. Using the Z-parameter and the maximum power transfer efficiency formula, we determine the maximum power transfer efficiency of wireless power transfer systems. The results showed that the maximum power transfer efficiency increases as the mode number or the radiation efficiency increases. To verify the theory, we fabricate and measure two different power transfer systems: one comprises two antennas generating $TM_{01}$ mode; the other comprises two antennas generating $TM_{02}$ mode. When the distance between the centers of the antennas was 30 cm, the maximum power transfer efficiency of the antennas generating the $TM_{02}$ mode increased by 62 % compared to that of the antennas generating the $TM_{01}$ mode.
Key words: Canonical Minimum Scattering Antenna, Higher Order Mode, Spherical Mode, Wireless Power Transmission

ABOUT
ARTICLE CATEGORY

Browse all articles >

BROWSE ARTICLES
AUTHOR INFORMATION
Editorial Office
#706 Totoo Valley, 217 Saechang-ro, Yongsan-gu, Seoul 04376, Korea
Tel: +82-2-337-9666    Fax: +82-2-6390-7550    E-mail: admin-jees@kiees.or.kr                

Copyright © 2019 by The Korean Institute of Electromagnetic Engineering and Science. All rights reserved.

Developed in M2community

Close layer
prev next