AJM_article.pdf (103.84 kB)
Download file

A Modification of Gustavsen and Semlyen’s vector fitting algorithm for overestimated model order

Download (103.84 kB)
posted on 2021-12-06, 20:00 authored by Andrew MackayAndrew Mackay
Gustavsen and Semlyen’s vector fitting algorithm (VFA) is popular for the determination of the poles and residues of a sampled response function, modeled as a finite order rational function. However, it does not always perform well when the original function is of infinite order and/or the model order is overestimated. This article is concerned with a novel “null-space” modification of the VFA that provides an accurate representation of the original function when the model order is large and when the original VFA performs poorly. The null-space method is parameterized by a single control parameter, L, which can be adjusted to improve accuracy. Comparisons are made with the original VFA and another of Gustavsen’s modifications


Email Address of Submitting Author

Submitting Author's Institution

Universal Electromagnetics Ltd

Submitting Author's Country

United Kingdom

Usage metrics