Abstract
The application of network-oriented methods to electromagnetic field problems can contribute significantly to the problem formulation and solution methodology. The field problem can be systematically treated by the segmentation technique and by specifying canonical Foster representations for the subcircuits. Connection between different subdomains is obtained by selecting the appropriate independent field quantities via Tellegen's theorem. For each subdomain, as well as for the entire circuit, an equivalent circuit extraction procedure is feasible, either in closed form for subdomains amenable of analytical description or via the relevant pole structure description when a numerical solution is available.