Novel Wireless Power Transfer for IoT by Polygonal Cell Applied Metasurface and Yagi-Uda Structure

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K04050
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21020:Communication and network engineering-related
• Research Institution: Hakodate National College of Technology
• Principal Investigator: Tamami Maruyama 函館工業高等専門学校, 生産システム工学科, 教授 (90735523)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 八木宇田アンテナ / レクテナ / IoT / メタサーフェス / ワイヤレス電力伝送 / WPT / ワイヤレス給電 / 空間伝送型WPT

Outline of Final Research Achievements

By applying the waveguide principle of the Yagi-Uda antenna to LEDs that were conventionally turned on by placing them extremely close to the wave source, we succeeded in turning on the LEDs of all elements in the array at the same time, as far as 150 mm away from the source. This revealed an interesting phenomenon: the LEDs could be turned on at a greater distance without supplying additional power to the target, thanks to the guiding elements. The performance of rectenna arrays was successfully improved by loop type, bent dipole type, multi-sectorization, and impedance loading. For metasurfaces, varactor diode loading with large vias, beam direction control, multibanding, and multivia loading were investigated, and the paper was accepted for publication.

Free Research Field

アンテナ・伝搬

Academic Significance and Societal Importance of the Research Achievements

本研究では、Wi－Fiテザリングモードなど通信用の電波を用いて多数のLEDをワイヤレス給電することに成功している。空中に放射されている、通信用の電磁波を無線電力伝送技術によってエネルギーに変化させられれば、IoTセンサーなどを給電する電力が不要となり、エネルギーの削減に貢献できるという社会的意義がある。また、多角形セルによる電磁波の制御、導波作用による電力の伝搬はいずれも申請者オリジナルのアイデアであり、他に例が無く学術的な意義がある。