Rigorous analysis of arbitrarily shaped H- and E-plane discontinuities in rectangular waveguides by a full-wave boundary contour mode-matching method

Author

Reiter, Jan Michael ; Arndt, Fritz

Author_Institution

Microwave Dept., Bremen Univ., Germany

Volume

43

Issue

4

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

796

Lastpage

801

Abstract

A rigorous boundary contour mode-matching (BCMM) method is presented for the efficient calculation of the modal scattering matrix of arbitrarily shaped Hand E-plane discontinuities, junctions, and/or obstacles in rectangular waveguides. For the inhomogeneous waveguide region with general contour, the field is expanded in the complete set of cylindrical wave functions. The full-wave expansion allows the immediate rigorous inclusion of cascaded structures such as combined H- and E-plane bends. The efficiency of the method is demonstrated at the rigorous design of useful waveguide components which could not be modeled by mode-matching technique so far: cylindrical post-compensated H-plane T-junction, mitered H-plane and E-plane bends of arbitrary angle, cascaded H-/E-plane bends, circular post-coupled filter, E-plane filter with rounded corners, 180° rat race structure, and side-coupled dual TE₃₁₁/TE₁₁₃-mode filter. The theory is verified by measurements

Keywords

S-matrix theory; mode matching; rectangular waveguides; waveguide components; waveguide discontinuities; waveguide filters; waveguide theory; 180° rat race structure; E-plane discontinuities; E-plane filter; H-plane discontinuities; TE₃₁₁/TE₁₁₃-mode filter; arbitrarily shaped discontinuities; boundary contour mode-matching method; cascaded structures; circular post-coupled filter; cylindrical post-compensated T-junction; cylindrical wave functions; full-wave expansion; mitered bends; modal scattering matrix; obstacles; rectangular waveguides; side-coupled dual-mode filter; waveguide components; waveguide junctions; Microwave filters; Mode matching methods; Planar waveguides; Rectangular waveguides; Scattering; Shape; Transmission line matrix methods; Waveguide components; Waveguide discontinuities; Waveguide junctions;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.375226

Filename

375226