Takuya Sasatani is a project assistant professor(特任助教) in the Graduate School of Engineering, the University of Tokyo. His research focuses on empowering the internet of things by exploring new approaches for ubiquitous wireless power transfer (WPT), low-power communication, and sensing technologies.

Takuya received his Ph.D. degree in information science and technology and a B.E. degree in electrical and electronic engineering from The University of Tokyo, Japan, in 2021 and 2016. During his graduate studies, he worked at Disney Research, USA, as a lab associate researcher.

E-mail: sasatani<at>akg.t.u-tokyo.ac.jp

Twitter: @takuyasasatani

Address: Room #112C1 Bldg. 2, Faculty of Eng. The Univ. of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656 JAPAN

News

Sept. 23, 2021

Our project on room-scale wireless power is featured on the cover and in the editorial of Nature Electronics, September 2021 issue.

Aug. 30, 2021

Our Article on room-scale wireless power is now published in Nature Electronics.

Takuya Sasatani, Alanson P. Sample, Yoshihiro Kawahara, Room-scale magnetoquasistatic wireless power transfer using a cavity-based multimode resonator, Nature Electronics, 2021. [Article link] [public copy]

Images related to this publication can be found here.

Please credit The University of Tokyo and Nature Electronics when using these material in news stories.

Selected research projects

Room-scale wireless power transfer via multimode quasistatic cavity resonance

This work presents an approach termed multimode quasistatic cavity resonance for enabling efficient and safe wireless power throughout a room-scale volume.

Related publications

  1. Takuya Sasatani, Alanson P. Sample, Yoshihiro Kawahara, "Room-scale magnetoquasistatic wireless power transfer using a cavity-based multimode resonator," Nature Electronics, 2021.

  2. Takuya Sasatani, Matthew J. Chabalko, Yoshihiro Kawahara, and Alanson P. Sample, “Multimode Quasistatic Cavity Resonators for Wireless Power Transfer,” IEEE Antennas and Wireless Propagation Letters, 2017. [paper]

  3. 笹谷拓也,川原圭博,“部屋全域への無線電力伝送に向けたマルチモード準静空洞共振器,” 研究報告ユビキタスコンピューティングシステム(UBI), 2019. 山下記念論文賞 & 優秀論文賞

Alvus: an instantly reconfigurable 2-D wireless power transfer system

We often place devices on surfaces such as desks and shelves; thus, deploying 2-D wireless power transfer on these surfaces can offer a ubiquitous charging experience. This work presents a reconfigurable 2-D wireless charging system, leveraging the "multi-hop" power transfer effect for facilitating the deployment of such functional surfaces.

Related publications

  1. Kazunobu Sumiya, Takuya Sasatani, Yuki Nishizawa, Kenji Tsushio, Yoshiaki Narusue, and Yoshihiro Kawahara, “Alvus: A Reconfigurable 2-D Wireless Charging System,” ACM IMWUT, 2019. [paper] Distinguished paper award (formerly the best paper award)

A cuttable wireless power transfer sheet

To integrate wireless power transfer (WPT) functions into daily surfaces, people need to design a coil array according to the size and shape of the target surface. This work presents a cuttable WPT sheet that only requires users to cut and paste a ready-made sheet to augment everyday surfaces into a wireless charging surface.

Related publications

  1. Ryo Takahashi, Takuya Sasatani, Fuminori Okuya, Yoshiaki Narusue, and Yoshihiro Kawahara, “A Cuttable Wireless Power Transfer Sheet,” ACM IMWUT, 2018. [paper]

Room-wide wireless power transfer and low-power communication for the Internet of Things

To achieve long-term operation of IoT systems, (i) ubiquitous wireless power transfer and (ii) low-power communication systems are necessary. This work presents a wireless power/data transfer system, which co-exists on the 3-D magnetic field channel generated by a room-scale quasistatic cavity resonator.

Related publications

  1. Takuya Sasatani, Chouchang Jack Yang, Matthew J. Chabalko, Yoshihiro Kawahara, and Alanson P. Sample, “Room-Wide Wireless Charging and Load-Modulation Communication via Quasistatic Cavity Resonance,” ACM IMWUT, 2018. [paper]

TelemetRing: a batteryless and wireless ring-shaped keyboard using inductive telemetry

TelemetRing is a batteryless and wireless ring-shaped keyboard that supports command and text entry in daily lives by detecting finger typing on various surfaces. The proposed inductive telemetry approach eliminates bulky batteries or capacitors from the ring part.

Related publications

  1. Ryo Takahashi, Masaaki Fukumoto, Changyo Han, Takuya Sasatani, Yoshiaki Narusue, and Yoshihiro Kawahara, “TelemetRing: A Batteryless and Wireless Ring-shaped Keyboard using Passive Inductive Telemetry,” ACM UIST, 2020.

Empowering robots with circuit/wireless technology

As robots become more complex, small, and sophisticated, the cost and effort necessary for “wiring” become critical. This series of work explore techniques for efficiently empowering the system peripherals necessary in robotic applications.

Related publications

  1. Colm McCaffrey, Takuya Umedachi, Weiwei Jiang, Takuya Sasatani, Yoshiaki Narusue, Ryuma Niiyama, Yoshihiro Kawahara, “Continuum robotic caterpillar with wirelessly powered shape memory alloy actuators”, J. of Softrobotics, 2020.

  2. Yuki Nishizawa, Takuya Sasatani, Matthew Ishige, Yoshiaki Narusue, Takuya Umedachi, Yoshihiro Kawahara, “Ramus: A Frequency-Multiplexed Power Bus for Powering, Sensing and Controlling Robots,” IEEE Robotics and Automation Letters (Proc. of RoboSoft 2020), 2020.

  3. Lai Chen, Takuya Sasatani, Keung Or, Satoshi Nishikawa, Yoshihiro Kawahara, Ryuma Niiyama, and Yasuo Kuniyoshi, "Wireless powered dielectric elastomer actuator," IEEE Robotics and Automation Letters (Proc. of IROS 2021), 2021.

wpt-cat.mp4

Designing wireless power receivers with Genetic Algorithm


Related publications

  1. Takuya Sasatani, Yoshiaki Narusue, and Yoshihiro Kawahara, “Genetic Algorithm-Based Receiving Resonator Array Design for Wireless Power Transfer,” IEEE Access, 2020.

Silver Tape: inkjet-printed circuits peeled-and-transferred on versatile substrates


Related publications

  1. Tingyu Cheng*, Koya Narumi*, Youngwook Do, Yang Zhang, Tung D. Ta, Takuya Sasatani, Eric Markvicka, Yoshihiro Kawahara, Lining Yao, Gregory D. Abowd, and HyunJoo Oh, “Silver Tape: Inkjet-Printed Circuits Peeled-and-Transferred on Versatile Substrates,” ACM IMWUT, 2020.

Wireless power transfer and communication over the hinges of smart glasses


Related publications

  1. Ken Takaki, Takuya Sasatani, Hironobu Kasashima, Yoshihiro Kawahara, and Takeshi Naemura “Coil Design for Wireless Power Transfer and Communication over Hinges of Smart Glasses,” ISWC, 2020.

Inkjet printed, passive, and contactless epidermal pressure sensor


Related publications

  1. Takahiro Hashizume, Takuya Sasatani, Koya Narumi, Yoshiaki Narusue, Yoshihiro Kawahara, and Tohru Asami, “Passive and Contactless Epidermal Pressure Sensor Printed with Silver Nano-particle Ink,” ACM UbiComp, 2016.

  2. 橋爪崇弘,笹谷拓也,成末義哲,川原圭博,浅見徹,”銀ナノインクを用いた非接触読み取り可能なパッシブ型静電容量式圧力センサと着圧測定への応用,” DICOMO2016. 最優秀論文賞 & 優秀プレゼンテーション賞

Dynamic complex impedance conversion using multiple-input DC/DC converters


Related publications

  1. Takuya Sasatani, Yoshiaki Narusue, and Yoshihiro Kawahara, “Dynamic Complex Impedance Tuning Method Using a Multiple-Input DC/DC Converter for Wireless Power Transfer,” IEEE WPTC 2018. Best Student Paper Finalist

Wireless power transfer for personal mobility devices


Related publications

  1. Hiromasa Hayashi, Katsuhiro Hata, Takuya Sasatani, Hiroki Sato, Ryosuke Yamamura, Young ah Seong, Ryuma Niiyama, and Yoshihiro Kawahara, “Effect of Body Materials on Transmission Efficiency and Resonant Frequency in Wirelessly Powered Personal Mobility Devices,” IEEE WPTC 2020.

  2. Hiromasa Hayashi, Takuya Sasatani, Yoshiaki Narusue, and Yoshihiro Kawahara, “Design of Wireless Power Transfer Systems for Personal Mobility Devices in City Space,” IEEE VTC 2019.