Integral equations and state variables in the s-domain modeling of passive multilayered components

This paper outlines the basic ideas of a new and very efficient integral method for the electromagnetic modelling of boxed multilayered passive circuits. Differently from standard integral approaches, the method leads to a state-space representation of the component, which directly permits us to find its admittance matrix, in the form of a reduced-order pole expansion in the s-domain, through standard Krylov sub-space technique.