An Ultra Miniaturized Implantable Antenna for Gastrointestinal Tract Monitoring

A ultra miniaturized implantable antenna operating on Industrial, Scientific and Medical (ISM) band of 902–928 MHz is proposed in this paper. This antenna is designed on bio-compatible Rogers ULTRA-LAM 3850HT (ε
r
= 2.9, tanδ = 0.0025) dielectric with a thickness of 0.1 mm for substrate and super-strate. Shorting pin has been introduced to miniature the antenna geometry with a volume of 8 mm×8 mm×0.2 mm making it flexible for monitoring. This antenna is preferable in terms of size and performance with a maximum gain of −28.2 dBi having a bandwidth of 178.6 MHz at a single Industrial, Scientific and Medical (ISM) band of 902–928 MHz. This antenna provides better bandwidth and gain on this frequency with these dimensions proving itself beneficial for monitoring the gastrointestinal tract of the patient.