Modal analysis of all-walls longitudinally corrugated rectangular waveguides using a symptotic corrugations boundary conditions

Mou Kehn Ng*

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The asymptotic corrugations boundary conditions (ACBCs) are used together with classical theory of vector potentials and an innovative combination of matrix systems to analyze rectangular waveguides having all four walls being longitudinally (axially) corrugated. One matrix system is composed of the ACBCs of two opposite walls, while the other comprises those of the other pair of corrugated walls. A transcendental characteristic equation is derived, from which the modal dispersion diagram can be obtained, for all three modal wave-tyoes: fast space, slow surface, and evanescent waves. From the formulation, analytical modal field functions in closed form are also acquired. Results of dispersion graphs and modal field distributions generated by this method are compared favorably with those obtained by a commercial full-wave solver.

Original languageEnglish
Article number6623208
Pages (from-to)3821-3837
Number of pages17
JournalIEEE Transactions on Microwave Theory and Techniques
Volume61
Issue number11
DOIs
StatePublished - 14 Oct 2013

Keywords

  • Asymptotic corrugations boundary condition (ACBC)
  • corrugated waveguides
  • dispersion diagram

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