Application of perturbation theory to toroidal ferrite phase shifters

Author

Lax, Benjamin ; Pehowich, John

Author_Institution

MIT Lincoln Lab., Lexington, MA, USA

Volume

39

Issue

12

fYear

1991

fDate

12/1/1991 12:00:00 AM

Firstpage

2198

Lastpage

2203

Abstract

An application of a perturbation formalism is developed to solve for the phase shift of inhomogeneously loaded waveguides containing ferrite toroids with dielectric inserts. The nonreciprocal differential phase shift is derived explicitly for single and double toroidal phase shifters and agrees with experiment over a broad band of frequencies. A formalism that can take into account the coupling of the higher-order modes to the fundamental mode by the geometrical inhomogeneities and tensor properties of the ferrite is described. It is shown that the theory can also be used to evaluate the impedances over a broad bandwidth

Keywords

dielectric-loaded waveguides; ferrite devices; microwave devices; perturbation techniques; phase shifters; waveguide components; waveguide theory; dielectric inserts; equivalent dielectrically loaded waveguide; ferrite toroids; fundamental mode; geometrical inhomogeneities; higher-order modes; impedances; inhomogeneously loaded waveguides; nonreciprocal differential phase shift; perturbation theory; tensor properties; toroidal ferrite phase shifters; Dielectrics; Electromagnetic waveguides; Equations; Ferrites; Frequency; Geometry; Impedance; Magnetic materials; Phase shifters; Slabs;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.106565

Filename

106565