Novel unified mode matching analysis of concentric waveguide junctions

Author

Lin, S.L. ; Li, L.W. ; Yeo, T.S.

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore

Volume

148

Issue

6

fYear

2001

fDate

12/1/2001 12:00:00 AM

Firstpage

369

Lastpage

374

Abstract

A novel unified mode matching technique is proposed for the calculation of the modal scattering matrix of concentric waveguide junctions. The TE and TM modal fields in both waveguides which are connected to form the junction are expressed in the Cartesian coordinate system, so that the coupling coefficients of all the modes can be evaluated effectively. All types of waveguide junction are dealt with in a similar manner and no special function is required. As examples, the scattering parameters of nine types of waveguide junction are calculated and compared with other methods or measurements in the literature. Very good agreement in all these cases demonstrates the efficiency, accuracy and flexibility of this technique

Keywords

S-matrix theory; electromagnetic coupling; electromagnetic fields; mode matching; waveguide junctions; waveguide theory; Cartesian coordinate system; TE modal fields; TM modal fields; concentric waveguide junctions; concentric waveguide step discontinuities; coupling coefficients; generalised scattering matrix; modal scattering matrix; scattering parameters; unified mode matching analysis;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:20010754

Filename

986931