A Numerical Procedure for the Analysis of EMC/EMI Problems in Radio Communication Systems Operating in Complex Environments

An efficient combined full-wave/high-frequency procedure useful to evaluate the spatial distribution of the electromagnetic field excited by radio sources operating in complex environments is presented. The procedure is based on a full-wave technique for the evaluation of the field distribution excited within a volume surrounding the radiating sources, and a dedicated high-frequency technique useful to model the propagation and interaction of the electromagnetic field with electrically penetrable objects forming the operative environment. In this way, it is possible to determine, with a reduced computational burden, the field distribution from the source location to the far-field region while keeping a high numerical accuracy. Using the proposed procedure, it is possible to evaluate the performance of mobile radio communication systems taking into account the impact of the operative environment, which is in turn essential to identify safety areas in compliance with the electromagnetic compatibility (EMC) regulations. Numerical examples aimed to predict potential EMC/EMI issues which could be caused by a mobile communication system operating in a complex scenario modeling a crisis area are also reported.