Flexible UHF RFID Tag for Human Body Motion Detection

With the growing diffusion of the Internet of Things concept and the advances in low-power electronics, the RFID (Radio Frequency Identification) technology has gained attention in various fields, from entertainment to medicine, for example. Its sensing and signal processing capability allows us to highlight this technology as one of the main solutions in reducing cost and complexity in such applications. This work presents the design and test of a flexible RFID tag operating in the American UHF frequency of 915 MHz, for human body motion detection. Through the analysis of the Received Signal Strength Indicator (RSSI) variation with time and its Fast Fourier Transform (FFT) it was possible to ensure the tag's applicability.