Improved computation of propagation losses in waveguide structures using perturbation of boundary conditions

Stephan Marini*, Michael Mattes, Benito Gimeno, Vicente E. Boria

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this letter, a method for the improved consideration of propagation losses in metallic waveguide structures is presented. The method relies on the perturbation of the boundary conditions on the metallic walls of the waveguides. Following this advanced technique, we are able to compute a complex modal propagation constant, thus avoiding the drawbacks of the classical power-loss method where losses associated to evanescent modes were not taken into account. A Computer Aided Design (CAD) software package based on such a modal analysis tool has been applied to predict the propagation loss effects in a Ka-Band rectangular waveguide filter.

Original languageEnglish
Article number6035742
JournalIEEE Microwave and Wireless Components Letters
Volume21
Issue number11
Pages (from-to)577-579
Number of pages3
ISSN1531-1309
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

Keywords

  • Complex propagation constant
  • dissipative filters
  • losses
  • perturbation method
  • waveguide components

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