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Flat-topped beam forming experiment for microwave power transfer system to a vehicle roof

Part of: WPT for Sustainable Electronics (WiPE)

Published online by Cambridge University Press:  13 April 2015

Takaki Ishikawa  and
Naoki Shinohara
Takaki Ishikawa*
Affiliation:
Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto, 6110011, Japan
Naoki Shinohara
Affiliation:
Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto, 6110011, Japan
*
Corresponding author: T. Ishikawa Email: i-takaki@rish.kyoto-u.ac.jp
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Abstract

We proposed and examined a microwave power transfer system for electric vehicles (EVs). In this system, electricity is transmitted from a transmitting antenna over an EV to a receiving antenna on the roof of the EV. We used a rectenna to convert the received microwave power to direct current power. The conversion efficiency of a rectenna array is affected by the input power level distribution, and we have to form a flat-topped beam pattern to increase the conversion efficiency. We conducted an experiment to form a flat-topped beam pattern by using a phased array antenna. In this experiment, the output power of each antenna element is uniform and cannot be controlled independently. Hence, we controlled only the output phases of each antenna element and formed a flat-topped beam pattern. The distance between the transmitting antenna and the receiving area is 6.45 m, and the receiving area corresponds to a space in which the azimuth and elevation are in the range of −5°–5°.

Keywords

Microwave power transferPhased array antennaFlat-topped beam patternElectric vehicle
Type
Research Article
Information
Wireless Power Transfer , Volume 2 , Special Issue 1: Wireless Power Transmission for Sustainable Electronics (WiPE) , March 2015 , pp. 15 - 21
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Copyright
Copyright © Cambridge University Press 2015 

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References

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