Abstract: Current flows in a three-dimensional conductive or dielectric body embedded in a substrate of a different material are modelled in terms of surface currents induced in planar surfaces bounding the body and composed of the same material as the substrate, the surfaces having appropriate values for surface impedance.

Abstract: Current flows in a three-dimensional conductive or dielectric body embedded in a substrate of a different material are modelled in terms of surface currents induced in planar surfaces bounding the body and composed of the same material as the substrate, the surfaces having appropriate values for surface impedance.

Abstract: A method of concatenating a plurality of narrowband frequency-domain models of a linear time-invariant (LTI) system, each model being descriptive of the system's operational characteristics over a different respective frequency range, to derive a single broadband model that describes the system's operational characteristics over the total frequency range encompassed by the narrowband models, includes assembling stable poles of matrix representations of the narrowband frequency-domain models together with additional poles satisfying a predetermined criterion, based on band-limited truncated Complete Orthonormal Kautz Bases (COKB) requirements, to derive a canonical modal system matrix, deriving a band-limited controllability Grammian as a function of the canonical modal system matrix.