Generation of accurate rational models of lossy systems using the Cauchy method

Alejandro García Lampérez, Tapan K. Sarkar, Magdalena Salazar Palma

Research output: Contribution to journalArticlepeer-review

65 Scopus citations


A method to generate an accurate rational model of lossy systems from either measurements or an electromagnetic analysis is presented. The Cauchy method has been used to achieve this goal. This formulation is valid either for lossless or lossy system responses. Thus, it provides an improvement over the conventional Cauchy method and takes into account the relationship between the transmission and reflection coefficients of the system which in our case is a filter. The resulting model can be used to extract the coupling structure of the filter. Two examples have been presented. One deals with measured data and the other one uses numerical simulation data from an electromagnetic analysis.

Original languageEnglish (US)
Pages (from-to)490-492
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number10
StatePublished - Oct 2004


  • Bandpass filter
  • Cauchy method
  • Coupling matrix
  • Rational model
  • Scattering parameters

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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