Microwave Wireless Power Supply System to a Micro Aerial Vehicle

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  • ODA Akinori
    東京大学大学院新領域創成科学研究科先端エネルギー工学専攻
  • SAWAHARA Hironori
    東京大学大学院新領域創成科学研究科先端エネルギー工学専攻
  • ISHIBA Mai
    東京大学大学院新領域創成科学研究科先端エネルギー工学専攻
  • SHIMANE Eri
    東京大学大学院新領域創成科学研究科先端エネルギー工学専攻
  • KOMATSU Shuhei
    東京大学大学院新領域創成科学研究科先端エネルギー工学専攻
  • KATSUNAGA Kenta
    東京大学大学院新領域創成科学研究科先端エネルギー工学専攻
  • OZAWA Ryoji
    東京大学大学院工学系研究科航空宇宙工学専攻
  • ERTEL Hanno
    東京大学大学院新領域創成科学研究科先端エネルギー工学専攻
  • KOMURASAKI Kimiya
    東京大学大学院新領域創成科学研究科先端エネルギー工学専攻
  • ARAKAWA Yoshihiro
    東京大学大学院工学系研究科航空宇宙工学専攻

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Other Title
  • 小型飛行体へのマイクロ波無線給電システム
  • コガタ ヒコウタイ エ ノ マイクロハ ムセン キュウデン システム

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Abstract

A microwave power beaming system was developed to realize wireless power supply to a Micro Aerial Vehicle. This system consists of transmitting, tracking, and receiving systems. In the transmitting system, a 5.8GHz microwave beam was irradiated from an active phased array antenna. Transmitting power was 4W and the beam divergence angle was 9deg. In the tracking system, a 2.45GHz pilot signal was detected by a two-dimensional tracking antenna and the position was deduced though the software retro-directive function. The maximum tracking error was 1.97deg in the azimuth direction and 1.79deg in the radial direction. In the receiving system, a light-weight flexible patch rectenna was developed using felt pad as substrate. The maximum rectenna efficiency of 45.3% was obtained with a 100Ω road at 63mW input power. By integrating these systems, auto-tracking wireless power supply was demonstrated to a MAV model circling at the altitude of 1,500mm. As a result, a motor was kept rotated. Received power was 24.3mW at maximum and 17.6mW on average and the total transmission efficiency was estimated at 0.60%.

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