Influence of the Radiating UE Distribution Irregularity in Building Internal Space on the Level of Indoor Electromagnetic Background

Previous results of studies of the radio frequency electromagnetic background (EMB) created in buildings by radiations of user's equipment (UE), including mobile phones and mMTC/IoT equipment, are based on the model of uniform random distribution of this equipment over the building internal space. However, the main part of this devices located in buildings is distributed along the walls of the premises with a tendency of concentration near the intersections of flat surfaces of walls, floors and ceilings. Paper presents the results of comparative analysis of the average EMB intensity inside building for different types of UE indoor spatial distribution: for their uniform distribution over internal space, for their uniform distribution over internal surfaces, and for their uniform distribution along the lines of intersection of these surfaces. Results of this analysis indicate relatively small differences in average EMB levels received for each of considered types of UE spatial distribution what makes it possible to ignore these differences at worst-case estimations of indoor EMB.