Computational electromagnetic exposure assessment of augmented reality smart glasses operating at 26 GHz

Industry 4.0 aims to revolutionize work processes through the integration of advanced communication technologies, including 5G networks which will enable workers to interact with their environment in entirely new ways. It is therefore crucial to investigate emerging electromagnetic exposure scenarios related to 5G technologies in occupational environments. This study provides a preliminary exposure assessment of augmented reality (AR) smart glasses operating in the 5 G millimeter-wave range (i.e., at 26 GHz). To reproduce the AR device, a 1 × 4 linear patch antenna array was integrated in the model of a pair of glasses. A possible work related exposure scenario was then simulated by locating the AR glasses on the head of a human anatomical model. In this study the E-field radiated by the wearable smart glasses and that induced inside the head have been evaluated. Moreover, the absorbed power density (Sab), the dosimetric quantity recommended by 2020 ICNIRP guidelines at 26 GHz, has been calculated. The results show that Sab distribution has three main focal areas: above the ear, on the temple, and on the lateral side of the nose. The calculated Sab values in this study are below the basic restrictions for local occupational exposure above 6 GHz and for durations exceeding 6 minutes, as recommended by ICNIRP in 2020.