FEM analysis of coplanar waveguide with ferrite magnetised in an axial or transverse direction

Author

Zhou, Lezhu ; Davis, Lionel E.

Author_Institution

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

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

1410

Lastpage

1413

Abstract

A detailed analysis of a sandwich coupled slotline with axially or transversely magnetised ferrite layer has been carried out by using the finite element method (FEM) with edge elements. Comparison of the dispersion characteristics and phase shift shows that the variable reciprocal phase shift is larger with an axial bias field than with a transverse field, and that the non-reciprocal phase shift per unit length (with transverse field) increases with frequency whereas the reciprocal phase shift per unit length (with axial field) decreases with frequency. Also conductor-backed coplanar structures may be more suitable than suspended structures

Keywords

coplanar waveguides; dispersion (wave); electromagnetic wave propagation; ferrite phase shifters; ferrite-loaded waveguides; finite element analysis; slot lines; waveguide theory; FEM analysis; axial bias field; axially magnetised ferrite layer; conductor-backed coplanar structures; coplanar waveguide; dispersion characteristics; edge elements; finite element method; frequency; nonreciprocal phase shift per unit length; phase shift; phase shifters design; reciprocal phase shift per unit length; sandwich coupled slotline; suspended structures; transverse field; transversely magnetised ferrite layer; variable reciprocal phase shift; Coplanar waveguides; Couplings; Eigenvalues and eigenfunctions; Ferrites; Finite element methods; Frequency; Magnetic analysis; Magnetic domains; Magnetization; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.582521

Filename

582521