Methodology for Electromagnetic Field Exposure Assessment of 5G Massive MIMO Antennas Accounting for Spatial Variability of Radiated Power

The technology of massive Multiple Input Output (maMIMO) antennas introduces new challenges in the Radio Frequency Electromagnetic Fields (RF EMF) exposure assessment 5G base stations due to aleatory changes radiation direction. beamforming capabilities antenna modify pattern both space and time domain order adapt electromagnetic footprint user positions, mobility, service requests. Recently, Base Station (BS) power monitoring counters per Angular Regions (AR) were introduced maMIMO for associated specific angular directions. By analyzing averaged reported by ARs paper proposes, making use simulations, a methodology quantify statistical spatial reduction factor (0.05 0.5, on assumptions adopted this paper) be applied RF EMF process accounting variability pattern. proposed approach enhances completes already described normative documents characterizing variations total radiated power. is completed with sensitivity analysis size each AR respect beam size; shows that good resolution achieved when Region has almost same as beam’s half width.