Near-field modeling of self-tuning antennas for the tactile internet

Tactile Internet (TI) is the new frontier of the Internet of Things that is based on free-hand gestures as a human/computer interface. A promising enabler for TI is the recently introduced Radiofrequency Finger Augmentation Device (R-FAD) family, assistive technology for the recovery of lost or damaged senses. The R-FAD core comprises a wrist reader coupled in near-field with a fingertip sensor tag. To prevent the interruption of the wrist-finger link during the touch of objects, self-tuning microchips must be used since they are capable to adapt their internal impedance and preserve the communication. A unitary electromagnetic/electric model is here proposed to address the double specificity of R-FAD devices for TI, namely the Near-Field interaction among the antennas, and the dynamic behavior of the IC. The model is based on a two-port network and is suitable for the application to the constrained design of robust communication links.