Evaluation of SAR in Human Body Models Exposed to EMF at 865 MHz Emitted from UHF RFID Fixed Readers Working in the Internet of Things (IoT) System

The aim of this ongoing study was to evaluate the specific energy absorption rate (SAR) values in the body of a person present near-fixed readers of ultra-high frequency (UHF) radio frequency identification (RFID) passive tags incorporated in real-time locating systems (RTLS), operating at a frequency range of 865–868 MHz, considering various exposure scenarios. The modelled electromagnetic field (EMF) source was a rectangular microstrip antenna designed at resonance frequency in free space at 865 MHz. The SAR values in the body exposed to EMF 5 cm away from the UHF RFID readers need consideration with respect to general public exposure limits, when the radiated power exceeds 8 W.