A 6.78 MHz wirelessly powered sensing system for the long-term monitoring of the GI tract

Rammouz, RamzyRamzyRammouzStanzione, StefanoStefanoStanzioneVis, PeterPeterVisAdamopoulos, VasileiosVasileiosAdamopoulosCastro Miller, Ivan DarioIvan DarioCastro MillerGarripoli, CarmineCarmineGarripoliTorfs, TomTomTorfs2026-07-232026-07-232025979-8-3315-7337-92163-4025https://imec-publications.be/handle/20.500.12860/59927This article presents a battery-free system with a 6.78 MHz wireless power transfer (WPT) link for the long-term monitoring of the gastrointestinal tract. For this purpose, a 2.7x2.7mm2 Application Specific Integrated Circuit (ASIC) is developed and validated. It enables efficient power reception at microwatt power levels deep in the human body. The ASIC is interfaced to ultra-low power electronics that measure and wirelessly transmit data from ten sensor readouts suitable for use in ingestible sensing capsules. The system’s ability to operate at a depth of 8 cm within human tissue while adhering to Specific Absorption Rate limits is demonstrated in an experimental setup.engA 6.78 MHz wirelessly powered sensing system for the long-term monitoring of the GI tractProceedings paper10.1109/biocas67066.2025.00085WOS:001789406300072CAPSULERECTIFIERSENSORRANGE