Higher order modes in coupled striplines: prediction and measurement

Author

Tsitsos, Stelios ; Gibson, Andrew A P ; McCormick, Alan H I

Author_Institution

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

Volume

42

Issue

11

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

2071

Lastpage

2077

Abstract

Finite element and resonant cavity methods are used to predict and confirm the cut-off frequencies of higher order modes in stripline. Infinite elements are used to treat open-wall boundaries. Single lines, symmetrically coupled and asymmetrically coupled lines are treated in turn. In the tightly coupled situation the cut-off frequency of the lowest TE mode degenerates to that of an abutted combined linewidth. Established approximation methods for single lines are used where possible. Some practical observations are made and selected finite element field plots are included for completeness

Keywords

cavity resonators; finite element analysis; strip lines; waveguide theory; TE mode; abutted combined linewidth; asymmetrically coupled lines; coupled striplines; cut-off frequencies; finite element method; higher order modes; infinite elements; open-wall boundaries; resonant cavity; single lines; symmetrically coupled lines; Conformal mapping; Cutoff frequency; Finite element methods; Frequency measurement; Geometry; Impedance; Process design; Resonance; Stripline; Tellurium;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.330121

Filename

330121