TY - GEN
T1 - Design of miniaturized wireless power receivers for mm-sized implants
AU - Kim, Chul
AU - Ha, Sohmyung
AU - Akinin, Abraham
AU - Park, Jiwoong
AU - Kubendran, Rajkumar
AU - Wang, Hui
AU - Mercier, Patrick P.
AU - Cauwenberghs, Gert
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/7/26
Y1 - 2017/7/26
N2 - 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.
AB - 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.
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U2 - 10.1109/CICC.2017.7993703
DO - 10.1109/CICC.2017.7993703
M3 - Conference contribution
AN - SCOPUS:85030467199
T3 - Proceedings of the Custom Integrated Circuits Conference
BT - 38th Annual Custom Integrated Circuits Conference
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 38th Annual Custom Integrated Circuits Conference, CICC 2017
Y2 - 30 April 2017 through 3 May 2017
ER -