microwave transmission, microwave power beaming, phased array, rectenna, electric automobile, building, roadmap, life cycle cost, Schottky diode, direct current
その他のタイトル（英）
Development of rectenna for high power microwave power transmission
Research Institute for Sustainable Humanosphere, Kyoto University
Research Institute for Sustainable Humanosphere, Kyoto University
Research Institute for Sustainable Humanosphere, Kyoto University
Research Institute for Sustainable Humanosphere, Kyoto University
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
第27回宇宙エネルギーシンポジウム 平成19年度
雑誌名(英)
The Twenty-seventh Space Energy Symposium
ページ
83 - 87
発行年
2008-05
抄録（英）
For the Space Solar Power Satellite/Station (SPS), we have to advance and expand Microwave Power Transmission (MPT) technologies on ground. However, there is no allowed frequency for the MPT by law in the world. It seems negative feedback between development and industry. Therefore, we have proposed three step roadmap of the MPT to advance the MPT as follows; First Step: Weak Power - Wireless Power Transmission under Present Regulation (RF-ID (Radio Frequency-IDentification), LED (Light Emitting Diode), IC (Integrated Circuit), Ubiquitous Power Source, Energy Harvesting..) or High Power - Wireless Power Transmission in Closed Area under Present Frequency Regulation. Second Step: High Power - Wireless Power Transmission (WPT) under New Frequency Regulation (Special Frequency for WPT, not yet) to/from Moving Target/Transmitter on Ground. Final Step: Wireless Power Transmission in/from/to Space (SPS). In this paper, we show some new application of the high power MPT on ground. Our proposed system is the MPT in a pipe or the MPT in a closed area. One is a wireless charging system of Electric Vehicle (EV). The other is a Wireless Power Distribution System (WPDS) in a building. In both systems, we need high efficient rectenna, rectifying antenna, with higher microwave power of approximately 10-100 W. In this presentation, we will show the developed high power rectenna with commonly used Si Schottky barrier diodes and microwave circuits. The rectenna for EV charging provides 58.6 percent at 2.45 GHz, 10 W, 30 Ohm of RF-DC (Radio Frequency-Direct Current) conversion efficiency which is improved 7.6 point against previous rectenna for EV. The rectenna for WPDS theoretically provides 63.5 percent at 2.45 GHz, 100 W of RF-DC conversion efficiency which is improved 11.5 point against previous rectenna for WPDS.
大電力マイクロ波無線電力伝送用レクテナの開発
