Zradziński, PatrykKarpowicz, JolantaGryz, KrzysztofOwczarek, GrzegorzRamos-Gonzalez, Maria Victoria2022-04-182022-04-182021-06-21Sensors (Basel). 2021;21(12):4251.http://hdl.handle.net/20.500.12105/13982The aim of this study was to model and evaluate the Specific Energy Absorption Rate (SAR) values in humans in proximity to fixed multi-antenna I-RFID readers of passive tags under various scenarios mimicking exposure when they are incorporated in Real-Time Location Systems (RTLS), or used to monitor Personal Protective Equipment (PPE). The sources of the electromagnetic field (EMF) in the modelled readers were rectangular microstrip antennas at a resonance frequency in free space of 866 MHz from the ultra-high frequency (UHF) RFID frequency range of 865-868 MHz. The obtained results of numerical modelling showed that the SAR values in the body 5 cm away from the UHF RFID readers need consideration with respect to exposure limits set by international guidelines to prevent adverse thermal effects of exposure to EMF: when the effective radiated power exceeds 5.5 W with respect to the general public/unrestricted environments exposure limits, and with respect to occupational/restricted environments exposure limits, when the effective radiated power exceeds 27.5 W.engVoRhttp://creativecommons.org/licenses/by/4.0/Internet of Things (IoT)Personal Protective Equipment (PPE)RadioFrequency IDentification (RFID)Real-Time Location Systems (RTLS)Biomedical engineeringEnvironmental engineeringNumerical simulationsOccupational exposurePublic healthSpecific energy absorption rate (SAR)Atribución 4.0 Internacional342058082112425110.3390/s211242511424-8220Sensors (Basel, Switzerland)open access