Design of miniaturized wireless power receivers for mm-sized implants

Chul Kim, Sohmyung Ha, Abraham Akinin, Jiwoong Park, Rajkumar Kubendran, Hui Wang, Patrick P. Mercier, Gert Cauwenberghs

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Advances in free-floating miniature medical implants promise to offer greater effectiveness, safety, endurance, and robustness than today's prevailing medical implants. Wireless power transfer (WPT) is key to miniaturized implants by eliminating the need for bulky batteries. This paper reviews design strategies for WPT with mm-sized implants focusing on resonant electromagnetic and ultrasonic transmission. While ultrasonic WPT offers shorter wavelengths for sub-mm implants, electromagnetic WPT above 100 MHz offers superior power transfer and conversion efficiency owing to better impedance matching through inhomogeneous tissue. Electromagnetic WPT also allows for fully integrating the entire wireless power receiver system with an on-chip coil. Attaining high power transfer efficiency requires careful design of the integrated coil geometry for high quality factor as well as loop-free power and signal distribution routing to avoid eddy currents. Regulating rectifiers have improved power and voltage conversion efficiency by combining the two RF to DC conversion steps into a single process. Example designs of regulating rectifiers for fully integrated wireless power receivers are presented.

Original languageEnglish (US)
Title of host publication38th Annual Custom Integrated Circuits Conference
Subtitle of host publicationA Showcase for Integrated Circuit Design in Silicon Hills, CICC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Volume2017-April
ISBN (Electronic)9781509051915
DOIs
StatePublished - Jul 26 2017
Event38th Annual Custom Integrated Circuits Conference, CICC 2017 - Austin, United States
Duration: Apr 30 2017May 3 2017

Other

Other38th Annual Custom Integrated Circuits Conference, CICC 2017
CountryUnited States
CityAustin
Period4/30/175/3/17

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Kim, C., Ha, S., Akinin, A., Park, J., Kubendran, R., Wang, H., Mercier, P. P., & Cauwenberghs, G. (2017). Design of miniaturized wireless power receivers for mm-sized implants. In 38th Annual Custom Integrated Circuits Conference: A Showcase for Integrated Circuit Design in Silicon Hills, CICC 2017 (Vol. 2017-April). [7993703] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CICC.2017.7993703