Circuit modelling for electromagnetic compatibility

Sophisticated software is widely available in the form of mathematical and circuit analysis packages. This computing power can be harnessed to assess the electromagnetic coupling between signals in a system and currents in the structure. To achieve this objective, it is necessary to have reliable circuit models of the coupling parameters. A method of formulating such models is described, illustrating key relationships between circuit theory and electromagnetic theory. It is shown how general-purpose testing can be used to refine any model, and how the results of formal testing can be predicted