Cut-off frequencies of magnetoplasma slab-loaded waveguides using an iterative finite element method

Author

Tio, L.Y. ; Gibson, A.A.P. ; Dillon, B.M. ; Davis, L.E.

Author_Institution

Dept. of Electr. Eng. & Electron., Univ. of Manchester Inst. of Sci. & Technol., UK

Volume

152

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

63

Lastpage

68

Abstract

An iterative finite element method is introduced to calculate the cut-off plane of slab-loaded magnetoplasma waveguides. As the slab filling ratio increases, both the modal cut-off numbers and the singlemode bandwidth reduce. Overmoding is predicted if the bias field is chosen such that the extraordinary wave resonance falls within the waveguide frequency range. Split cut-off numbers are indicative of increased nonreciprocity in the propagation constants. From an investigation of the propagation constants, specific structures and bias conditions are recommended for the development of isolators and differential phase shifters in the frequency range 190-460 GHz.

Keywords

finite element analysis; iterative methods; microwave isolators; millimetre wave phase shifters; modal analysis; plasma filled waveguides; waveguide theory; cut-off frequencies; differential phase shifters; isolators; iterative finite element method; modal cut-off numbers; propagation constants; singlemode bandwidth; slab filling ratio; slab-loaded magnetoplasma waveguides;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:20045098

Filename

1430604