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WPT by a pair of short helical dipoles

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2 Author(s)
Takashi Uesaka ; Graduate School of Engineering, Yokohama National University 79-5, Tokiwadai, Hodogaya-ku, Yokohama-shi, 240-8501 Japan ; Hiroyuki Arai

Wireless power transmission (WPT) by two short helical dipoles arrayed orthogonally is presented. For the electric resonance coupling WPT system, the short dipoles need for a matching circuit due to cancel its large capacitance at the operating frequency. In the proposed method, the loss is reduced by using the helical structure instead of matching circuit. Its power transmission characteristics are shown in experiments. The measured results are agreed with the calculated results of a pair of dipoles with a matching circuit. In the orthogonal arrangement, the WPT is possible in the wide range expect for the angle θ = 0 between the antennas. At θ = π/4, the coupling coefficient becomes the maximum, and the WPT is enabled for the longest distance.

Published in:

Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications (IMWS), 2012 IEEE MTT-S International

Date of Conference:

10-11 May 2012