Study on New Charge Pump Rectifier for Harvesting of Ambient Radio Waves for IoT

• Project/Area Number: 16K06353
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Communication/Network engineering
• Research Institution: Kyoto University
• Principal Investigator: Shinohara Naoki 京都大学, 生存圏研究所, 教授 (10283657)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: ワイヤレス給電 / マイクロ波送電 / 整流回路 / レクテナ / エネルギーハーベスティング

Outline of Final Research Achievements

In this research, I developed new rectifier for a rectenna (rectifying antenna) to harvest ambient weak radio waves with high conversion efficiency to electricity. The new rectifier can create high voltage with high efficiency from weak radio waves. There are a lot of research and development of Charge Pump rectifier which can create high voltage with high efficiency from weak radio waves. However, the efficiency of the Charge Pump rectifier is poor because it consists of many diodes and capacitances. So I proposed new rectifier which is merged with a Single Shunt rectifier and the Charge Pump rectifier and developed it.

Academic Significance and Societal Importance of the Research Achievements

弱い電力でも高効率で所望電圧を発生できるレクテナ整流回路を用いると、周辺の弱い電磁波から電気エネルギーを得ることができるため、この技術は電池や電源が不要な新しいエネルギーソースとして期待されている。この技術はあまり大きな電力を必要としないIoTセンサー等の電池レス化・コードレス化に適しているとされ、本研究の成果は今後のIoT社会の実現に寄与できるものと考える。また外部にマイクロ波エネルギーの送電装置を備えればさらに能動的にかつより大きなワイヤレスな電力を送ることも可能となる。

Research Products

• [Journal Article] Study on 5.8 Ghz Single-stage Charge Pump Rectifier for Internal Wireless System of Satellite (2017)
  • Author(s): Ce Wang, Naoki Shinohara, and Tomohiko Mitani
  • Journal Title: IEEE Trans. MTT Volume: 4
  • Peer Reviewed
• [Presentation] 人工衛星内部無線システム用多段チャージポンプ整流回路の設計 (2019)
  • Author(s): 王策, 篠原真毅, 三谷友彦
  • Organizer: 第19回宇宙太陽発電と無線電力伝送に関する研究会
• [Presentation] Recent Wireless Power R&D in Japan and in the World (2018)
  • Author(s): Naoki Shinohara
  • Organizer: 2018 Korean Wireless Power Promotion Forum (KWPF)
  • Int'l Joint Research / Invited
• [Presentation] Novel Rectifier for low power far field WPT and energy harvesting (2018)
  • Author(s): Naoki Shinohara and Ce Wang
  • Organizer: 2018 International Wireless Symposium (IWS)
  • Int'l Joint Research / Invited
• [Presentation] 5.8GHz人工衛星内部ワイヤレスシステム用チャージポンプ整流回路の設計と応用 (2018)
  • Author(s): 王策, 篠原真毅, 三谷友彦
  • Organizer: 電子情報通信学会無線電力伝送研究会
• [Presentation] Study on 5.8 GHz Single-Stage Charge Pump Rectifier for Internal Wireless System of Satellite (2017)
  • Author(s): Ce Wang, Naoki Shinohara, and Tomohiko Mitani
  • Organizer: 11th European Conference on Antenna and Propagation (EuCAP2017)
  • Place of Presentation: Paris, France
  • Year and Date: 2017-03-19
  • Int'l Joint Research
• [Presentation] The Relationship between the Class-F Charge Pump Rectenna Array and the DC Load (2017)
  • Author(s): Ce Wang, Seishiro Kojima, Yang Bo, Daichi Nishio, Tomohiko Mitani, and Naoki Shinohara
  • Organizer: 3rd Asian Wireless Power Transfer Workshop 2017
  • Int'l Joint Research