S. Koulouridis, Sofia Bakogianni, A. Diet, Y. Le Bihan, L. Pichon
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Investigation of efficient wireless charging for deep implanted medical devices
A human tissue-implantable rectenna that is intended for wireless data telemetry and power transmission operation is considered. To that end, a compact-size planar inverted F-antenna (PIFA) that initially operates within the Medical Device Radiocommunications Service (MedRadio, 402-405 MHz) and the industrial, scientific and medical (ISM, 902.8-928 MHz) bands is considered in order to evaluate advantages and disadvantages of radiating versus inductive power harvesting at sub-GHz region. The inductive coupling is carried out in MHz region in order to employ very small (mm-diameter). The scenario considered focuses on implants embedded in depths higher than 10mm. The analysis is carried out inside the muscle tissue of a cylindrical three-layered phantom representing the human arm. The Specific Absorption Rate (SAR) performance of the implanted system is assessed. The RF-to-DC conversion efficiency is also taken into account.
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