Broadband macromodeling of sampled frequency data using z-domain vector-fitting method

  • Mekonnen Y
  • Schutt-Ainé J
  • 6


    Mendeley users who have this article in their library.
  • 15


    Citations of this article.


The vector-fitting algorithm has been used as the main macromodeling tool for approximating frequency domain responses of complex interconnects and electrical packages [Gustavsen and Semlyen, 1999]. In this paper, a new methodology is proposed to fit transfer functions of frequency response data obtained from numerical electromagnetic simulation or measured frequency-domain or time-domain response data. This new method, z-domain vector- fitting (ZDVF), is a formulation of vector-fitting method in the Z domain; it has an advantage of faster convergence and better numerical stability compared to the s-domain vector-fitting method (VF). The fast convergence of the method reduces the overall macromodel generation time. The accuracy, numerical stability and convergence speed of VF and ZDVF are compared. Examples are provided to demonstrate the advantage of the ZDVF.

Author-supplied keywords

  • Macromodeling
  • Rational functions
  • System identification
  • Vector fitting method

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Yidnek S. Mekonnen

  • José E. Schutt-Ainé

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free