A Probabilistic Approach to EMC Modeling and Analysis

Abstract

EMC modeling and analysis is commonly carried out using a deterministic point of view in which the sign­ als, coupling paths, and equipment characteristics are assumed to be known. Uncertainties are accounted for by utilizing "worst-case" models. However, many modern electromagnetic environments and electronic equipments have become so complex they no longer can be modeled either realistically or efficiently using a determinis­ tic approach. In reality, the electromagnetic environ­ ment and equipment susceptibility are random in nature. Not only does the probabilistic approach provide a natural vehicle for describing the resulting uncertain­ ties, but statistical models can be developed which may simplify the problem of characterizing complicated signals and equipments. This paper presents a probabi­ listic EMC model which can be used when the determinis­ tic approach to EMC' modeling and analysis is inappro­ priate .