Title:
Radio-Mechanical Model of Epidermal Antenna Stretching During Human Gestures

Abstract:
Recent developments in Materials and Radiofrequency Identification (RFID) technologies are currently stimulating the development of new class of flexible epidermal devices for the wireless remote monitoring of biophysical parameters. The natural movements and gestures of the human body will not only produce mechanical stretching of skin antennas but they could also affect their communication performance. In this contribution we quantify the degradation of the radiation gain of on-skin UHF antennas in common gestures by a combined mechanical-electromagnetic model. The deformation of the skin is firstly quantified by using a 3D scanner and hence the communication impact is evaluated with reference to a typical 867 MHz thin wire split-ring epidermal antenna. Preliminary numerical simulations and experimentations demonstrated that the behavior of the antenna is modified with a maximum 30% degradation of the read distance for the strain orientation producing the minimum mechanical stiffness.

Authors:
G. Diotallevi, C. Miozzi, M. Cirelli, P. Valentini, G. Marrocco

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