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Macromodeling of transfer functions with higher-order pole multiplicities

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3 Author(s)
Deschrijver, D. ; Dept. of Math. & Comput. Sci., Univ. of Antwerp, Antwerp ; Dhaene, T. ; Rolain, Y.

Vector fitting is a rational approximation technique, which is frequently used to calculate accurate macromodels of electrical and electronical structures. The robustness of the technique is obtained by combining the use of a weighted iterative least squares scheme and a well-chosen partial fraction basis. It was discussed in that numerical problems may occur if poles of higher-order multiplicities are required to approximate a frequency response. This paper shows that the orthonormal vector fitting technique [3] solves this problem in a fundamental way.

Published in:

Signal Propagation on Interconnects, 2007. SPI 2007. IEEE Workshop on

Date of Conference:

13-16 May 2007