Abstract
In this article, a broadband equivalent circuit was developed to model the electromagnetic behavior of complex interconnection structures in metallic casings of arbitrary geometry. Based on the eigenfunctions of the system, this model is inherently stable in the time domain due to its passivity and allows simulation by a commercial circuit simulator with arbitrary linear or nonlinear port terminations. The typically slow convergence of the circuit model is accelerated by the extraction of quasi-static inductances and capacitances and losses are considered by additional resistive elements. The presented model is validated in the frequency domain by elaborate full-wave simulations.
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