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Rational Function Fitting of Electromagnetic Transfer Functions from Frequency-Domain and Time-Domain Data

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2 Author(s)
Se-jung Moon ; University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA ; Andreas C. Cangellaris

This paper presents a new methodology for synthesis of broadband equivalent circuits for multi-port high speed interconnect systems from numerically obtained and/or measured frequency-domain and time-domain response data. The equivalent circuit synthesis is based on the rational function fitting of admittance matrix, which combines the frequency-domain vector fitting process, VECTFIT with its time-domain analog, TDVF to yield a robust and versatile fitting algorithm. The generated rational fit is directly converted into a SPICE-compatible circuit after passivity enforcement. The accuracy of the resulting algorithm is demonstrated through its application to the fitting of the admittance matrix of a power/ground plane structure

Published in:

2006 IEEE MTT-S International Microwave Symposium Digest

Date of Conference:

11-16 June 2006