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Macromodeling of Multiport Systems Using a Fast Implementation of the Vector Fitting Method

2008; IEEE Microwave Theory and Techniques Society; Volume: 18; Issue: 6 Linguagem: Inglês

10.1109/lmwc.2008.922585

1558-1764

Dirk Deschrijver, Michał Mrozowski, Tom Dhaene, D. De Zutter,

Electromagnetic Simulation and Numerical Methods

Broadband macromodeling of large multiport systems by vector fitting can be time consuming and resource demanding when all elements of the system matrix share a common set of poles. This letter presents a robust approach which removes the sparsity of the block-structured least-squares equations by a direct application of the QR decomposition. A 60-port printed circuit board example illustrates that considerable savings in terms of computation time and memory requirements are obtained.