Abstract
We demonstrate control of wireless power transfer to an implanted bioelectronic device using harmonic feedback from the backscattered field. The feedback mechanism relies only on inherent nonlinearities in the receiver circuit and can provide a direct measurement of the extracted power without any modification of the device. We use the method to control an implanted light-emitting diode while varying the coupling between the source and receiver.
Highlights
Control of wireless power transfer to a bioelectronic device by harmonic feedback Xi Tian, Pui Mun Lee, and John S
Wireless power transfer is key for the long-term operation of many classes of bioelectronic devices, such as biomedical sensors, neuroprostheses, and therapeutic devices.[1,2,3,4,5,6]
Such splitting does not provide a direct measure of the power extracted by the device and requires operation in the strong coupling regime, limiting its use for miniaturized or deeply implanted devices
Summary
Control of wireless power transfer to a bioelectronic device by harmonic feedback Xi Tian, Pui Mun Lee, and John S. The control method is based on the abrupt increase in the backscattered signal at the harmonic frequencies when the receiver circuit is operated near a nonlinear point.
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