Dispersion analysis of multilayer cylindrical transmission lines containing magnetized ferrite substrates

Author

Dib, Nihad ; Omar, Amjad

Author_Institution

Ansoft Corp., Elmwood Park, NJ, USA

Volume

50

Issue

7

fYear

2002

fDate

7/1/2002 12:00:00 AM

Firstpage

1730

Lastpage

1736

Abstract

Recently, there has been a growing interest in using cylindrical transmission lines that contain magnetized ferrite material in a variety of applications. In this paper, the finite-difference time-domain (FDTD) method (in cylindrical coordinates) and the spectral-domain analysis (SDA) are used to calculate the propagation characteristics of cylindrical transmission lines that contain magnetized ferrite material. The magnetization can be either in the longitudinal or azimuthal directions. Specifically, the cylindrical microstrip line, and the cylindrical coplanar waveguide printed on magnetized ferrite substrate are analyzed. Both the FDTD and SDA results are in very good agreement. In addition, the results are compared to those of planar structures by taking the radius of the substrate to be large enough such that the curvature effect is negligible

Keywords

circular waveguides; coplanar waveguides; ferrite-loaded waveguides; finite difference time-domain analysis; microstrip lines; spectral-domain analysis; transmission line theory; cylindrical coplanar waveguide; cylindrical microstrip line; dispersion analysis; finite-difference time-domain method; magnetized ferrite substrate; multilayer cylindrical transmission line; planar structure; propagation characteristics; spectral-domain analysis; Coplanar transmission lines; Ferrites; Finite difference methods; Magnetic analysis; Magnetic materials; Magnetic multilayers; Magnetization; Nonhomogeneous media; Time domain analysis; Transmission lines;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2002.800423

Filename

1017637