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タイトル: | Large-Scale Sequentially-Fed Array Antenna Radiating Flat-Top Beam for Microwave Power Transmission to Drones |
著者: | Takabayashi, Nobuyuki Kawai, Katsumi Mase, Mizuki Shinohara, Naoki https://orcid.org/0000-0003-1667-8847 (unconfirmed) Mitani, Tomohiko https://orcid.org/0000-0002-8544-2558 (unconfirmed) |
著者名の別形: | 高林, 伸幸 河合, 勝己 間瀬, 瑞季 篠原, 真毅 三谷, 友彦 |
キーワード: | Phased arrays Wireless communication Microstrip antenna arrays Rectennas Power transmission Microwave circuits Microwave antenna arrays Drone flat-top beam large-scale array microwave power transmission sequential array |
発行日: | Apr-2022 |
出版者: | Institute of Electrical and Electronics Engineers (IEEE) |
誌名: | IEEE Journal of Microwaves |
巻: | 2 |
号: | 2 |
開始ページ: | 297 |
終了ページ: | 306 |
抄録: | Power beaming is one of the core technologies for microwave power transmission (MPT) systems. Effective plane-to-plane power beaming requires not only high point-to-point efficiency but also appropriately-shaped beam to extract the best performance of receivers (rectennas). Flat-top beam plays an important role in plane-to-plane power beaming for drones where the output dc power from rectennas should be maximized to drive motors. It is challenging to develop a large-scale flat-top-beam array with appropriate distribution circuits. Sequential array is also required to suppress axial ratio on the receiving plane. In this paper, we proposed a simplified but effective way to create a large-scale sequential array for flat-top beam at C-band. The series feed and block-oriented sequential array were adopted to keep the circuit design and fabrication simple while obtaining a sufficient point-to-point efficiency and good axial ratio on the receiving plane. A 196-element phased array with microstrip antennas was developed by subdividing the whole array into four 49-element blocks for simplicity of the circuit design and implementation of block-oriented sequential array. The efficiency between the transmitting ports and the receiving ports was 50.6 % in simulations and 32.0 % in measurements. In the measured flat-top beam, the transmitted power was uniformly concentrated within the receiving plane and the axial ratio of the beam was successfully suppressed to less than 3 dB on most of the receiving area. A flight test of a microwave-powered drone was conducted where a micro-drone successfully flew for seven minutes only with wireless power. |
著作権等: | This work is licensed under a Creative Commons Attribution 4.0 License. |
URI: | http://hdl.handle.net/2433/276238 |
DOI(出版社版): | 10.1109/jmw.2022.3157845 |
出現コレクション: | 学術雑誌掲載論文等 |
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