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

• Published in: IEEE microwave and wireless components letters Vol. 18; no. 6; pp. 383 - 385
• Main Authors: Deschrijver, D., Mrozowski, M., Dhaene, T., De Zutter, D.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.06.2008; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Blocking; Broadband; Broadband macromodeling; Circuit simulation; Computational modeling; Convergence; DH-HEMTs; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Equations; Exact sciences and technology; Fittings; Frequency measurement; Function approximation; Least squares method; Mathematical analysis; Microwaves; numerical techniques; Poles and zeros; Printed circuits; Robustness; system identification; Transfer functions; vector fitting (VF); Vectors (mathematics); Multiple access; vector fitting (VF); Printed circuit board; Vector method; Implementation; numerical techniques; Computation time; Wide band; Least squares method; QR factorization; Printed circuit; System identification; Broadband macromodeling; Large scale system
• ISSN: 1531-1309; 1558-1764
• DOI: 10.1109/LMWC.2008.922585

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.