Screen Printed Epidermal Antenna for IoT Health Monitoring

In this paper, we investigate the applicability of screen printable elastic silver ink on thermoplastic polyurethane (TPU) substrate for the realization of a flexible/stretchable antenna for direct implementation on human skin. For this purpose, we present the design, manufacture, and testing of an ultra- high frequency (UHF) 868 MHz loop antenna with the specified material. The antenna performance has been investigated through simulations and measurements on a human forearm phantom, including indoor wireless communication tests, demonstrating its potential for short-range IoT health monitoring applications.