Análise da exposição eletromagnética passiva à multifontes distribuídas em ambientes abertos.

Abstract

In this work it is presented an analysis of the passive electromagnetic exposure produced by distributed multisource in outdoor. In order to obtain an accurate characterization of the phenomenon it has been made a literature review of the basics concepts and electromagnetic parameters taking into account the existing standards recommendations related to electromagnetic field. It is also reported the optimization technique by genetic algorithms. It is presented the electromagnetic field calculated results with the presence of a human head model and the dispositions of the obtained arrays in two steps. In the first step, are analyzed situations in which the antennas are placed at predetermined positions according to the electromagnetic field levels calculated from the distributions of the antennas. Subsequently, the positioning of the antennas is optimized with genetic algorithm in order to obtain and analyze the worst case in the study area, the maximum levels of electromagnetic fields on the user and its vicinity which are produced by the provision of the arrangement. Finally, levels of electromagnetic fields were calculated compared with levels of reference ones reported by the standard is made taking into account the level of the power sources, its spatial position and their quantity in the array. It is also made some observations on the levels obtained in the presence of a model of a human head. Finally, we present the final considerations aiming at the possibility of future works on the subject.