小渕大輔
Daisuke Kobuchi 

 Education

• Ph.D, The University of Tokyo, from April 2021. Advisor: Prof. Hiroyuki Morikawa

• MS Engineering, The University of Tokyo, March 2021. Advisor: Prof. Hiroyuki Morikawa

• BS Engineering, The University of Tokyo, March 2019. Advisor: Prof. Hiroyuki Morikawa

 Awards

• Outstanding Ph.D. Dissertation Award, Graduate School of Engineering, The University of Tokyo, March 2024.

• Young Scientist Award, GASS 2023, URSI, August 2023.

• Mentors Encouragement Award, 2021 ITU AI/ML in 5G Challenge, ITU, December 2021.

• Best Poster Presentation Award, RISING 2021, IEICE, November 2021.

• Outstanding Performance Award, 17th Student Competition, Wireless Power Transfer Workshop, IEICE, March 2021.  

• First Prize, Student Competition (WPT-mini4D), Asia-Pacific Microwave Conference (APMC), IEEE, November 2018.

Publications

Journal

• D. Kobuchi, H. Morikawa, and Y. Narusue, “Automatic Design of Transmitter and Receiver Coils for Wireless Power Transfer Systems by Using Current Distribution Analysis,” IEEE Access, vol. 12, pp. 49987-49996, April 2024.

• S. Garman, A. Saffari, D. Kobuchi, D. Stotland, J. R. Smith, and Z. Kapetanovic, “Carrier-Free RFID: Using Modulated Noise Communication to Read UHF RFID Tags,” IEEE Journal of Radio Frequency Identification, vol. 8, pp. 196-205, March 2024.

• D. Kobuchi, H. Morikawa, and Y. Narusue, “Phase Retrieval-based Z Parameter Estimation Method for Multiple-Input Multiple-Output Wireless Power Transfer Systems,” IEEE Access, vol. 11, pp. 129905-129913, Nov. 2023.

• D. Kobuchi, M. Fujishiro, H. Morikawa, and Y. Narusue, “An Automatic Coil Design Method for Wireless Power Transfer Systems by Current Distribution Analysis,” IEEE Access, vol. 11, pp. 94613-94622, Sept. 2023.

• D. Kobuchi, K. Matsuura, Y. Narusue, and H. Morikawa, “Cancellation of Harmonics in the Magnetic Field Leakage from Inductive Power Transfer Systems,” IEEE Transactions on Vehicular Technology, vol. 72, no. 4, pp. 4442-4452, April 2023.

• K. Matsuura, D. Kobuchi, Y. Narusue, and H. Morikawa, “Communication-Less Receiver-Side Resonant Frequency Tuning for Magnetically Coupled Wireless Power Transfer Systems,” IEEE Access, vol.11, pp. 23544-23556, March 2023.

• K. Matsuura, K. Shin, D. Kobuchi, Y. Narusue, and H. Morikawa, “Synchronization Strategy for Distributed Wireless Power Transfer with Periodic Frequency and Phase Synchronization,” IEEE Communications Letters, vol. 27, no. 1, pp. 391-395, Jan. 2023.

• I. Correa, A. Oliveira, B. Du, C. Nahum, D. Kobuchi, F. Bastos, H. Ohzeki, J. Borges, M. Mehta, P. Batista, R. Kondo, S. Gupta, V. Bhatia, and A. Klautau, “Simultaneous Beam Selection and Users Scheduling Evaluation in a Virtual World with Reinforcement Learning,” ITU Journal on Future and Evolving Technologies (ITU J-FET), vol. 3, issue 2, pp. 202-213, Sept. 2022.

• D. Kobuchi, K. Matsuura, Y. Narusue, and H. Morikawa, “Magnetic Field Leakage Cancellation in Multiple-Input Multiple-Output Wireless Power Transfer Systems,” IEEE Magnetics Letters, vol. 13, pp. 1-4, Feb. 2022.

• D. Kobuchi, Y. Narusue, and H. Morikawa, “Cancellation Conditions of Magnetic Field Leakage from Inductive Power Transfer Systems,” IEEE Transactions on Vehicular Technology, vol. 70, no. 5, pp. 4291-4302, May 2021.

• D. Kobuchi, N. Yabuta, Y. Narusue, T. Nakaoka, and S. Kawasaki, “C-band Watt-class HySIC GaN Amplifier for Active Integrated Antennas,” IEICE Transactions on Electronics, vol.J104-C, no.2, pp.52-59, Feb. 2021. (Invited)

International Conference

• Y. Kagaya, Z. Lin, D. Kobuchi, H. Morikawa and Y.Narusue, “Analysis of Spread Spectrum Pilot Signals to Suppress Co-Channel Interference for Microwave Power Transfer,” Proc. 2024 Fifteenth International Conference on Ubiquitous and Future Networks (ICUFN), Budapest, Hungary, July, 2024.

• R. Okubo, A. Yamaguchi, D. Kobuchi, Z. Lin, T. Morinaga, H. Morikawa, and Y. Narusue, “Single-Core Dual Coils in Wireless Power Transfer Systems With Force Display Functions,” Proc. IEEE Wireless Power Technologies Conference and Expo (WPTCE 2024), Kyoto, Japan, May, 2024.

• D. Kobuchi, Z. Lin, H. Morikawa, and Y. Narusue, “Cancellation of Magnetic Field Leakage in Fundamental and Harmonic Components for Inductive Power Transfer Systems,” Proc. IEEE Wireless Power Technologies Conference and Expo (WPTCE 2024), Kyoto, Japan, May, 2024.

• Z. Lin, D. Kobuchi, Y. Narusue, T. Suda, and S. Kawasaki, “The Data Communication Transmitter and Receiver for a 5.8 GHz AIPAA MPT-Sensor System by ICEt Technology,” Proc. 2023 Asia-Pacific Microwave Conference (APMC 2023), Taipei, Taiwan, Dec. 2023. 

• D. Kobuchi, R. Siragusa, Y. Narusue, A. Vena, and E. Perret, “Contactless Switching of a RF CBRAM Switch,” Proc. URSI General Assembly and Scientific Symposium (GASS 2023), Sapporo, Japan, Aug. 2023.

• S. Garman, A. Saffali, D. Kobuchi, J. R. Smith, and Z. Kapetanovic, “Modulated Noise Communication: Reading UHF RFID tags without a carrier,” Proc. 2023 IEEE International Conference on RFID (RFID 2023), Seattle, WA, USA, June, 2023.

• D. Kobuchi, G. E. Moore, Y. Narusue, and J. R. Smith, “Suppression of Receiver Harmonic Currents in Wireless Power Transfer Systems,” Proc. IEEE Wireless Power Technologies Conference and Expo (WPTCE 2023), San Diego, CA, USA, June, 2023.

• D. Kobuchi, K. Manabe, Y. Fuchigami, Y. Narusue, and H. Morikawa, “Virtual Cable: Beam-Direction Converter for IoT Communications inside a Motor,” Proc. 24th IEEE International Conference on Industrial Technology (ICIT 2023), Orlando, FL, USA, April 2023.

• D. Kobuchi, Jaesol Ahn, Y. Narusue, and H. Morikawa, “Z-Parameter Estimation for Multiple-Input Multiple-Output Wireless Power Transfer Systems via Phase Retrieval Method,” Proc. IEEE Wireless Power Week (WPW 2022), Bordeaux, France, July 2022.

• K. Matsuura, D. Kobuchi, Y. Narusue, and H. Morikawa, “Experimental Validation of Communication-Less Receiver-Side Resonant Frequency Tuning for Magnetic Resonant Wireless Power Transfer Systems,” Proc. 2021 Asian Wireless Power Transfer Workshop (AWPT 2021), Kuala Lumpur, Malaysia, Dec. 2021. 

• K. Matsuura, D. Kobuchi, Y. Narusue, and H. Morikawa, “Communication-Less Receiver-Side Resonant Frequency Tuning Method for Magnetically Coupled Wireless Power Transfer Systems,” Proc. 2021 IEEE Radio and Wireless Symposium (RWS 2021), San Diego, CA, USA, Jan. 2021.

• D. Kobuchi, K. Matsuura, Y. Narusue, and H. Morikawa, “Transmitter Control for Harmonics Reduction in Inductive Power Transfer System,” Proc. 2020 IEEE 9th Global Conference on Consumer Electronics (GCCE 2020), Kobe, Japan, Oct. 2020.

• S. Yoshida, K. Matsuura, D. Kobuchi, N. Yabuta, T. Nakaoka, K. Nishikawa, and S. Kawasaki, “The K-Band Communication Transmitter/Receiver Powered by the C-Band HySIC Energy Harvester with Multi-Sensors,” Proc. 2020 IEEE MTT-S International Microwave Symposium (IMS 2020), pp.1180-1183, Los Angeles, CA, USA, Aug. 2020.

• D. Kobuchi, Y. Narusue, Y. Kawahara, and H. Morikawa, “A Transmitter Array Control Method for Suppressing Magnetic Field Leakage from Wireless Power Transfer Systems,” Proc. 2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall), pp.1-5, Honolulu, HI, USA, Sept. 2019.

• D. Kobuchi, K. Matsuura, Y. Narusue, S. Yoshida, K. Nishikawa, and S. Kawasaki, “Smart Wireless Sensor System by Microwave Powering for Space-by-Wireless,” Proc. 2019 IEEE MTT-S International Microwave Symposium (IMS 2019), pp.1144-1147, Boston, MA, USA, May 2019.

Domestic Conference & Workshop

• 加賀谷湧, 林政東, 小渕大輔, 森川博之, 成末義哲, “マイクロ波給電におけるスペクトラム拡散パイロット信号を用いた同一チャネル干渉抑圧の検討,” 信学技報, vol. 124, no. 84, RCS2024-48, pp. 123-128, June 2024.

• 大久保諒一, 山口温大, 小渕大輔, 林政東, 森川博之, 成末義哲, “力覚提示機構を有する無線給電システム向けコア両用コイルの検討,” 信学総大, B-20-08, March 2024.

• 加賀谷湧, 林政東, 小渕大輔, 森川博之, 成末義哲, “マイクロ波電力伝送における同一 チャネル干渉を考慮したパイロット信号の設計,” 信学総大, B-20-27, March 2024.

• 大久保諒一，山口温大，小渕大輔, 林政東, 森川博之, 成末義哲, “力覚提示機構を有する無線給電スポットの設計,” 信学技報, 超知性ネットワーキングに関する分野横断型研究会(RISING 2023), Oct. 2023.

• D. Kobuchi, “Suppression of Receiver Harmonic Currents in Wireless Power Transfer Systems for Noise-Sensitive Devices,” The 4th UT2-MAC Workshop, May 2023.

• 小渕大輔, 成末義哲, 森川博之, “MIMO無線電力伝送システムにおける位相復元を用いたZ行列推定手法の実験評価,” 信学総大, B-20-18, March 2023.

• 大関啓史, 小渕大輔, 成末義哲, 森川博之, “磁界結合型無線電力伝送における磁気双極子モーメントに基づく漏洩磁界相殺器の設計,” 信学技報, vol. 122, no. 1, WPT2022-4, pp. 14-17, April 2022.

• 松浦賢太郎, 小渕大輔, 成末義哲, 森川博之, “磁界共振結合型無線給電向け高周波インダクタレス複素インピーダンス制御機構,” 信学総大, B-20-24, March 2022.

• 小渕大輔, 松浦賢太郎, 成末義哲, 森川博之, “MIMO無線電力伝送システムにおける位相復元を用いたZ行列推定手法の検討,” 信学総大, B-20-23, March 2022.

• 小渕大輔, 松浦賢太郎, 成末義哲, 森川博之, “磁界結合型無線電力伝送における漏洩磁界低減型送受電コイル自動設計の検討,” 信学技報, 超知性ネットワーキングに関する分野横断型研究会(RISING 2021), no. 70, Nov. 2021.

• 松浦賢太郎, 小渕大輔, 成末義哲, 森川博之, “分散協調型マイクロ波無線給電における受信電力最大化のための同期周期設計,” 信学技報, 超知性ネットワーキングに関する分野横断型研究会(RISING 2021), no. 67, Nov. 2021.

• 小渕大輔, 松浦賢太郎, 成末義哲, 森川博之, “磁界結合型無線電力伝送における入力電圧波形設計に基づく高調波磁界強度低減,” 信学技報, vol. 121, no. 245, WPT2021-11, pp. 11-16, Nov. 2021.

• 足立真志, 松浦賢太郎, 小渕大輔, 成末義哲, 森川博之, “無線給電向け周波数ホッピング型盗電防止手法の脆弱性に関する実験的検討,” 信学技報, vol. 121, no. 245, WPT2021-11, pp. 17-22, Nov. 2021.

• 足立真志, 松浦賢太郎, 小渕大輔, 成末義哲, 森川博之， “磁界共振結合型無線給電向け周波数ホッピング型盗電防止手法の脆弱性に関する一検討,” 信学ソ大, B-20-15, Sept. 2021.

• 新居貴志, 小渕大輔, 足立真志, アン ジェソル, 山中彬弘, 宮田亜由子, 岡本周祐, 高本順平, 成末義哲,清水俊也, "無線給電を活用したテーブルシステム試作検証報告," 日本オフィス学会大会, Sept. 2021. 

• 小渕大輔, 松浦賢太郎, 成末義哲, 森川博之, “磁界結合型無線給電における高調波磁界低減型入力電圧波形設計の実験評価,” 信学総大, B-20-8, March 2021.

• 松浦賢太郎, 小渕大輔, 成末義哲, 森川博之, “磁界共振結合型無線給電向け二次側共振周波数補正機構の自律制御に関する検討,” 信学総大, B-20-9, March. 2021.

• 松浦賢太郎，小渕大輔，成末義哲，森川博之，“磁界共振結合型無線電力伝送における自律的二次側共振周波数補正機構の検討,” 信学技報, vol. 120, no. 278, WPT2020-26, pp. 1 – 6, オンライン, Sept. 2020.

• 小渕大輔, 松浦賢太郎, 成末義哲, 森川博之, “磁界結合型無線電力伝送における高調波磁界強度低減に向けた入力電圧設計,” 信学ソ大, B-20-2, Sept. 2020.

• 薮田直人, 後藤優花, 小渕大輔, 内海淳, 中岡俊裕, 吉田賢史, 西川健二郎, 正光義則, 川崎繁男, “宇宙情報通信エネルギー技術のための RF HySIC デバイスに関する研究,” 信学総大, C-2-22, March 2020.

• 吉田賢史, 小渕大輔, 松浦賢太郎, 西川健二郎, 川崎繁男, “K 帯無線通信と C 帯マイクロ波無線電力伝送の両立によるワイヤレスセンサシステムの検討,” 信学総大, C-2-75, March 2020.

• 小渕大輔, 足立真志, 小原拓也, 清水駿斗, 米田崚平, 鈴木絢子, 松浦賢太郎, 成末義哲，吉田賢史，西川健二郎，森川博之，川﨑繁男，“ワイヤレスセンサシステムの実現に向けた高周波デバイスの開発,” 第 20 回宇宙科学シンポジウム, P1-74, Jan. 2020.

• 小渕大輔，成末義哲，川原圭博，森川博之，“磁界結合型無線電力伝送における漏洩磁界提言型送電器アレイ駆動方式の検討，” 信学技報, 119, no. 12, WPT2019-1, pp. 1 – 6, April 2019.

• 小渕大輔，松浦賢太郎，成末義哲，川崎繁男，“モノトーン無線通信電力伝送に向けた C 帯 10 W級薄型アクティブ集積アレーアンテナ用 GaNアンプ，” 信学技報, 119, no. 204, MW2019-62, pp. 37 – 42, Sept. 2019.

• 小渕大輔，松浦賢太郎，成末義哲，吉田賢史，西川健二郎，川崎繁男，“ワイヤレスセンサのシステムオンチップ化に向けた検討，” 電子情報通信学会総合大会，C-2-89，March 2019．

• 松浦賢太郎, 小渕大輔, 成末義哲, 濱野皓志, 鈴木絢子, 吉田賢史, 西川健二郎, 森川博之, 川崎繁男, “RF エナジーハーベスタによるワイヤレスセンサの現況,” 第 19 回宇宙科学シンポジウム, P-135, Jan. 2019.

Reviewer

• IEEE Transactions on Power Electronics

• IEEE Transactions on Intelligent Transportation Systems

• IEEE Access

• IEEE WPTCE, VPPC

Internship

• TSMC Design Center in Japan, August-September 2022.

• Sony Semiconductor Solutions Group, August-September 2019.

Research Experiences

• Research Intern, Sensor Systems Laboratory, Paul G. Allen School of Computer Science and Engineering, University of Washington, Seattle, USA, December 2022 - March 2023.

• JSPS-ERC Research Fellow, Laboratoire de Conception et d’Intégration des Systèmes (LCIS), Grenoble INP, Valence, France, May-July 2022.

• JSPS Research Fellowship for Young Scientist DC2, from April 2022.

• Designing Future Society Fellowship, The University of Tokyo, April 2021 - March 2022. 

• Assistant Researcher, Inter-University Research System, Japan Aerospace Exploration Agency (JAXA), March 2020 - March 2021.

• Research Assistant, World-leading Innovative Graduate Study Program Co-designing Future Society, The University of Tokyo, April 2020 - March 2022.

Other Experiences

• 12th Japan Public-Private Partnership Student Study Abroad Program, December 2022 - March 2023.

• Teaching Assistant, "Google × UTokyo Open Silicon WS", 2022.

• Teaching Assistant, "Engineering Application of Wireless Communication", 2019-2020.

• Volunteer Staff at Wireless Desk, Tokyo 2020 Olympic Games, 2021.