無線電力伝送に関連する最新の研究開発や技術動向をアジア圏の研究者間で共有するための国際ワークショップを2日間にわたりハイブリッド開催した。参加者数は78名、発表件数総数は44件であった。
AWPTの目的は、無線電力伝送に関連する最新の研究開発や技術動向をアジア圏の研究者間で共有するとともに、特に学生を含む若手研究者の国際学会発表の機会を与えるためのプラットフォームを提供することである。無線電力伝送は、携帯端末へのワイヤレス充電などにおいて既に実用化されており、近年ではウェアラブルデバイス／IoTデバイスへのワイヤレス給電、ドローンに対するワイヤレス給電など、様々な社会インフラへの応用が期待されている。さらに、2022年5月には日本国内において電波法施行規則が改正され無線電力伝送用構内無線局の開設が法整備されるなど、空間伝送型無線電力伝送技術の実用化の機運が高まっている。このような背景から2015年にAWPTが創設され、アジア圏内で毎年開催されている。2022年は京都大学宇治キャンパスきはだホールとオンラインとのハイブリッドで開催した。講演件数は基調講演2件、招待講演1件、一般講演（口頭）41件程度であった。また、優秀な発表をした学生に対してAwardを贈呈した。
AWPTでは学術界のみならず企業からの一般投稿もあり、AWPTの目的が達成されることにより、学生を含む若手研究者の育成、課題解決能力やモチベーションの向上に寄与するとともに、無線電力伝送に関するアジア圏でのネットワーク構築の促進が期待される。無線電力伝送は、国際的な法整備や規格策定が今後必須となる技術であり、多国間での産学連携によるコミュニティ形成は無線電力伝送の国際的な実用化に向けた推進力となり得る。特に生存圏研究所ではアジア圏での国際交流が盛んであり、AWPTを活用することにより無線電力伝送関連のアジア圏での国際共同研究への発展が期待される。このことは、共同利用・共同研究設備「マイクロ波エネルギー伝送実験装置（METLAB/SPSLAB）」の国際共同利用にも繋がる。
| 10:00–10:05 |
Opening Ceremony |
| 10:05–11:05 |
Keynote Speech 1
- Fundamentals of Meta-Tx: A Metamaterial-Assisted Tx for Compact WPT System for Wireless Charging of Implants
Ramesh Pokharel (Kyushu Univ., Japan)
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| 11:15–12:30 |
Antenna technologies for far-field WPT
- High Gain Patch Array Antenna Covered by Dielectric Slab for Wireless Power Transfer Systems
Yukina Ono, Keisuke Konno, Qiang Chen (Tohoku Univ., Japan), Qiaowei Yuan (Tohoku Inst. of Tech., Japan)
- Design of High Gain Omnidirectional Base Station Antenna for Sub-6 Band
Junyi Xu, Sirao Wu, Qiang Chen (Tohoku Univ., Japan)
- Study of Partially Driven Array Antenna with the Coupling Lines
Hiroyuki Kamada, Bo Yang, Wenyi Shao, Naoki Shinohara, Tomohiko Mitani (Kyoto Univ., Japan)
- Integrated Design of Ultra-lightweight Active Phased Array for Millimeter Wave Wireless Power Transfer
Wenyi Shao, Bo Yang, Hiroyuki Kamada, Naoki Shinohara (Kyoto Univ., Japan)
- Study on Phase Error Correction Method of Phased Array Antenna for Power Transmission
Yoko Segami, Toshio Ishizaki (Ryukoku Univ., Japan), Takayuki Matsumuro (ATR, Japan), Naoki Hasegawa, Yuta Nakamoto, Takahashi Hirakawa (Softbank Corp., Japan)
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| 13:30–14:45 |
Key Devices & Techniques for WPT
- Wireless Power Supply for LED Accessories Based on the Principle of the Looped Yagi-Uda Antenna
Noa Ebita, Tamami Maruyama, Masahi Nakatsugawa (NIT, Hakodate College, Japan), Masaya Tamura (Toyohashi Inst. of Tech., Japan)
- Hybrid power amplifier for WiCoPT WPT system
Ren Furumoto, Daisuke Yasunobu, Kenjiro Nishikawa (Kagoshima Univ., Japan)
- Basic Study on Transmission Side Impedance Matching in MRC-WPT
Taiga Hashi (Hosei Univ., Japan), Takahiro Miyaura (DAIHEN Corp., Japan), Sousuke Nakamura (Hosei Univ., Japan)
- A Halbach-array-based resonator for suppressing leakage magnetic field in wireless power transfer systems
Yuichi Honjo, Takuya Sasatani, Cedric Caremel, Yoshihiro Kawahara (The Univ. of Tokyo, Japan)
- Scattering Performance of Reflectarrays Covered by Band-Pass Frequency Selective Surfaces
Nozomi Chiku, Keisuke Konno, Qiang Chen (Tohoku Univ., Japan)
|
| 15:00–16:30 |
Novel WPT technologies
- Basic study on wireless multi-feeding of cavity resonance-enable wireless power transfer with higher-order mode
Kyosuke Onuma, Masaya Tamura (Toyohashi Univ. of Tech., Japan)
- Field-Plate Length Dependence of 2.4– GHz Rectification Characteristics of Gated-Anode GaN HEMT Based Diode
Gen Taguchi, Youichi Tsuchiya, Debaleen Biswasa (Nagoya Inst. of Tech., Japan), Ma Qiang, Yuji Ando, Hidemasa Takahashi (Nagoya Univ., Japan), Kenji Itoh, Naoki Sakai (Kanazawa Inst. of Tech., Japan), Akio Wakejima (Nagoya Inst. of Tech., Japan)
- Transmission Circuit Switching Control System Combining Speed Estimation and N-Legged Converter for Dynamic Wireless Power Transfer
Akihiro Okazaki, Takehiro Imura, Yoichi Hori (Tokyo Univ. of Science, Japan)
- Theory Development of Far-field Leakage Magnetic Field in Dynamic Wireless Power Transfer for Electric Vehicles Charging and Influence of Ferrite
Soma Hasegawa, Takehiro Imura, Yoichi Hori (Tokyo Univ. of Science, Japan)
- High frequency shielded-capacitive power transfer system with resonance rectifier
Katsumi Akiyoshi, Reiji Hattori, An-yu Uezu (Kyushu Univ., Japan)
- Experiments on Parallel Connected Microwave Rectifiers and Estimation Method of Their Characteristics
Takashi Hirakawa, Naoki Hasegawa, Yuta Nakamoto, Yoshichika Ota (Softbank Corp., Japan)
|
| 16:45–18:00 |
WPT Utilizing High Frequencies
- 5.8 GHz band 5W rectenna with GaAs E-pHEMT gated anode diodes
Naoki Furutani, Kaito Uchiyama, Fumiya Komatsu, Kohichi Kikkawa, Naoki Sakai, Kenji itoh (Kanazawa Inst. of Tech., Japan)
- 28 GHz Higher Efficiency Rectifier utilizing Second Harmonic Signal
Masahiro Nakagawa, Ren Furumoto, Satoshi Yoshida, Kenjiro Nishikawa (Kagoshima Univ., Japan)
- A 29 GHz band rectenna with a high impedance wire-loop antenna
Naoki Sakai, Tsukasa Hirai, Kenji Itoh (Kanazawa Inst. of Tech., Japan), Yuta Nakamoto, Takashi Hirakawa, Naoki Hasegawa (Softbank Corp., Japan)
- 5.8 GHz band 10 W-class double voltage rectifier MMIC with 0.5 µm E-pHEMT gated anode diodes
Yuya Hirose, Ryohei Takaya, Fumiya Komatsu, Naoki Sakai, Kenji Itoh (Kanazawa Inst. of Tech., Japan)
- Design of Low Efficiency Variation 5G Rectifier without External Matching Circuits
Babita Gyawali, Mohamed Aboualalaa, Adel Barakat, Ramesh K. Pokharel (Kyushu Univ., Japan)
|
| 10:00–11:00 |
Keynote Talk 2
- Wireless Power Transfer and Harvesting Platform (WPHP)
Muhammad Faeyz Karim (Nanyang Technological Univ., Singapore)
|
| 11:10–12:25 |
Key Applications for WPT
- Estimation of Battery Voltage on Hyper Harmony Electrical Power Drive —A New Breakthrough for Wireless Power Transfer Using Double Resonance—
Hiroshi Sakuraba (NIT, Sendai College, Japan), Tetsuya Magata (TOYOTA MOTOR EAST JAPAN, INC., Japan), Tomoha Sugai (NIT, Sendai College, Japan)
- Research on WPT-Robot : Comparison and Study of Wireless Power Transfer Methods for Tracking and Charging Function
Naoto Takayama, Yuta Shimizu, Koutarou Ozawa, Taku Shimizu (Hosei Univ., Japan), Shuhei Toga (DAIHEN Corp., Japan), Sousuke Nakamura (Hosei Univ., Japan)
- Automatized AR-based EM Field Visualization Technology —Using Spectrum Analyzer and Marker Detection—
Yunchong Tang, Qiaowei Yuan (Tohoku Inst. of Tech., Japan)
- Left-Handed Slotted Waveguide Analysis Using FDTD method
Kota Unyu, Tamami Maruyama, Masahi Nakatsugawa (NIT, Hakodate College, Japan), Manabu Omiya (Hokkaido Univ., Japan), Yasuhiro Tamayama (Nagaoka Univ. of Tech., Japan)
- Research on Characteristics of Arc-shaped CRLH waveguide for a Snow Melting System
Keto Togawa, Takeo Kobashi, Tsunayuki Yamamoto (NIT, Tsuyama College, Japan), Tamami Maruyama, Masashi Nakatsugawa, Takahiko Nakamura (NIT, Hakodate College, Japan), Keiichi Itoh (NIT, Akita College, Japan), Mitsuru Muramoto, Yutaka Nasuno(NIT, Tomakomai College, Japan), Kohzoh Ohshima(NIT, Asahikawa College, Japan), Manabu Omiya (Hokkaido Univ., Japan), Yasuhiro Tamayama (Nagaoka Univ. of Tech., Japan)
|
| 13:25–14:55 |
Underwater WPT Technologies
- Design of non-tunable matching circuit to improve the charging speed of drone with underwater WPT
Fuma Arito, Masaya Tamura (Toyohashi Univ. of Tech., Japan)
- Influence of Water Temperature on Contactless Power Transmission in Seawater
Satoshi Ishitani, Taisei Furuhashi, Mamiko Inamori (Tokai Univ., Japan)
- Frequency characteristics of wireless power transfer in seawater via magnetic resonant coupling
Yuki Miyakozawa, Takehiro Imura, Yoichi Hori (Tokyo Univ. of Science, Japan)
- Definition of Waterbed for study of Underwater WPT Systems
Ikuo Awai, Dai Futagami (Fujiwaves CO., LTD., Japan)
- Investigation of Data Transmission for Wireless Power Transfer System in Seawater
Ramadhan Nur Adabi, Mamiko Inamori, Keigo Uehara, Naoto Shibata, Shinnosuke Ito (Tokai Univ., Japan)
- Design of Electrodes Arrangement in Wireless Power Transfer System Using Capacitive Coupling to AUV at Underwater Charging Base
Yu Matsuura, Toshio Ishizaki (Ryukoku Univ., Japan), Ikuo Awai (Fujiwaves CO., LTD., Japan)
|
| 13:10–14:40 |
System technologies for WPT 1
- Nobel Experiment Plan of Wireless Power Transmission Using Small Satellite —A Satellite Rectenna Radio—
Yoshiyuki Fujino, Yuuta Nakajima, Koji Tanaka (Toyo Univ., Japan)
- Analysis on the wireless power transmission efficiency of the moving objects simultaneously fed by a single coil for the magnetic field coupled WPT
Akari Kamada, Tamami Maruyama, Masahi Nakatsugawa (NIT, Hakodate College, Japan), Masaya Tamura (Toyohashi Univ. of Tech., Japan)
- WPT performance dependency on the circumference length of the circuit shape waveguides
Yuga Sasaki, Masashi Nakatsugawa, Tamami Maruyama (NIT, Hakodate College, Japan), Manabu Omiya (Hokkaido Univ., Japan), Yasuhiro Tamayama (Nagaoka Univ. of Tech., Japan)
- Simultaneous Wireless Information and Power Transfer Technique Using Frequency-Modulated DC/DC Converters
Qunchao Zhou, Takuya Sasatani, Changyo Han, Yoshihiro Kawahara (The Univ. of Tokyo, Japan)
- Experimental Evaluation of Power and Data Transfer Characteristics on Short-Range MIMO WiCoPT System
Yotaro Watanabe, Shintaro Miya, Taishi Nara, Satoshi Yoshida (Kagoshima Univ., Japan), Shigeo Kawasaki (Space & Mobile Wireless Technology Inc., Japan), Kenjiro Nishikawa (Kagoshima Univ., Japan)
- Position-Independent MIMO-WPT System using Metamaterial-Assisted Passive Repeaters
Mohamed Aboualalaa, Ramesh K. Pokharel (Kyushu Univ., Japan)
|
| 16:55–18:30 |
System technologies for WPT 2
- [Invited] Dynamic-WPT System with Stable Output Power
Heng-Ming Hsu, Tai-Lai Yang (National Chung Hsing Univ., Taiwan)
- Dual-band Wireless Power Transfer System for Simultaneous Wireless Information and Power Transfer System
Teruki Yabuta, Satoshi Yoshida, Kenjiro Nishikawa (Kagoshima Univ., Japan)
- Experiment of wireless power transmission using millimeter-wave rectenna with modulated signal input
Yuta Nakamoto, Naoki Hasegawa, Takashi Hirakawa, Yoshichika Ohta (Softbank Corp., Japan), Naoki Sakai, Tsukasa Hirai, Kenji Itoh (Kanazawa Inst. of Tech., Japan)
- Demonstration of Wireless Power Transfer System based on Focusing Beam for Efficiency improving at Fresnel Distance
Naoki Hasegawa, Yuta Nakamoto, Takashi Hirakawa (Softbank Corp., Japan), Tsukasa Hirai, Naoki Sakai, Kenji Itoh (Kanazawa Inst. of Tech., Japan)
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| 18:10–18:30 |
Award Ceremony & Closing Remark |
