Fig. 2: Electrical characterization of bioresorbable RFID tag.
From: Bioresorbable RFID capsule for assessing medication adherence

a Antenna device architecture and simulated RF performance in equivalent tissue models (S11). b Schematic representation of RFID working principle. c RSSI measurement of RFID tags in air, in gelatin capsule and ex vivo in stomach. d FEM simulation of a device in 000 capsule. e Device dissolution in real gastric fluid (RGF) and f simulated gastric fluid (SGF) at pH=1.2 and 37 °C at 25 rpm. (Scale bars, 5 mm).