Self-reconfigurable micro-implants for cross-tissue wireless and batteryless connectivity Article Swipe

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Energy harvesting Wireless sensor network Computer science Wireless Adaptation (eye) Tracking (education) Key (lock) Backscatter (email) Energy (signal processing) Channel (broadcasting) Radio frequency Antenna (radio) Electronic engineering Electrical engineering Embedded system Computer network Engineering Telecommunications Physics Computer security Quantum mechanics Optics Pedagogy Psychology

Mohamed R. Abdelhamid , Ruicong Chen , Joonhyuk Cho , Anantha P. Chandrakasan , Fadel Adib ·

YOU? · · 2020 · Open Access · · DOI: https://doi.org/10.1145/3372224.3419216 · OA: W3089251705

We present the design, implementation, and evaluation of μmedIC, a fully-integrated wireless and batteryless micro-implanted sensor. The sensor powers up by harvesting energy from RF signals and communicates at near-zero power via backscatter. In contrast to prior designs which cannot operate across various in-body environments, our sensor can self-reconfigure to adapt to different tissues and channel conditions. This adaptation is made possible by two key innovations: a reprogrammable antenna that can tune its energy harvesting resonance to surrounding tissues, and a backscatter rate adaptation protocol that closes the feedback loop by tracking circuit-level sensor hints.