Summary
International Symposium on Antennas and Propagation
2012
Session Number:2E1
Session:
Number:2E1-1
Proposal of Electric Far Field Suppression Helical Antenna for High Efficiency WPT System
Koichi Tsunekawa,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
This paper proposed a double-helical antenna to increase the efficiency of wireless power transmission system. The structure is opposite winding double helix and it causes not only miniaturization, but also suppression of the electric far field radiation. Single antenna does not radiate the far field and its input characteristics is almost as Lecher wire. But impedance matching can be taken as consistent by coupling condition between the antennas and WPT efficiency is about 70% when antenna spacing is 1.5 times of the antenna diameter. This paper proposed a new antenna structure of the WPT system for high efficiency. It is expected to be applied to the charging system of electric vehicles.