Determination of the eigenfrequencies of a ferrite-filled cylindrical cavity resonator using the finite element method

Author

Chinn, Gilbert C. ; Epp, Larry W. ; Wilkins, Gregory M.

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

Volume

43

Issue

5

fYear

1995

fDate

5/1/1995 12:00:00 AM

Firstpage

1207

Lastpage

1209

Abstract

A formulation of the Finite Element Method (FEM) particular to axisymmetric problems containing anisotropic media is compared to an analytic solution. In particular, the resonant frequencies of a longitudinally biased ferrite-filled cylindrical cavity are examined. For comparison, a solution of the characteristic equation for the lossless, ferrite-filled cylindrical waveguide was modified to give the resonant frequencies of the cylindrical cavity. This analytical solution was then used to examine the error in the FEM formulation for the anisotropic case. It is noted that the FEM formulation for anisotropic material presented, based on both node and edge-based elements, is found to be free of spurious solutions

Keywords

cavity resonators; ferrite devices; finite element analysis; FEM formulation error; anisotropic media; axisymmetric problems; characteristic equation; cylindrical cavity resonator; edge-based elements; eigenfrequencies; ferrite-filled cavity resonator; finite element method; longitudinally biased cavity; node-based elements; resonant frequencies; Anisotropic magnetoresistance; Boundary conditions; Cavity resonators; Eigenvalues and eigenfunctions; Equations; Ferrites; Finite element methods; Propulsion; Resonant frequency; Tensile stress;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.382089

Filename

382089