High-Efficiency Wireless power Transfer for mm-Size Biomedical Implants

Delhaye, Thibault;André, Nicolas;Gilet, Samuel;Gimeno Gasca, Cecilia;Flandre, Denis;et.al.
(2017) 2017 IEEE Sensors Conference — Location: Glasgow (United Kingdom) (29.October.2017)

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In this study, a wireless power transfer system for miniaturized biomedical implants has been optimized for a 1mm-diameter receiver coil. This coil is wire wound around a 7.5 mm-long ferrite core and achieves a 3.56 μH inductance. For a distance of 10 mm between the industrial primary coil and the handmade secondary coil, measurements show a coupling factor of 3% and power transmission efficiencies of 21.6%, 20.8% and 20.5% respectively for a load power consumption of 1 mW, 500 μW and 250 μW, at 1cm distance and at 1 MHz, surpassing previously-reported comparable links.
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Delhaye, T., André, N., Gilet, S., Gimeno Gasca, C., Francis, L., & Flandre, D. (2017). High-Efficiency Wireless power Transfer for mm-Size Biomedical Implants. Proceedings of the 2017 IEEE Sensors Conference. Published. 2017 IEEE Sensors Conference, Glasgow (United Kingdom). https://hdl.handle.net/2078.5/272150