Analysis of partial-height ferrite-slab differential phase-shift sections

Author

Dillon, Bernice M. ; Gibson, Andrew A P

Author_Institution

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

Volume

48

Issue

9

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

1577

Lastpage

1582

Abstract

Rectangular waveguide loaded with transversely magnetized ferrite slabs is a classic arrangement used in the construction of high-power differential phase-shift circulators. The characterization of this structure is extended in this paper by using a combined magnetostatic/microwave finite-element method to evaluate propagation characteristics in terms of material parameters, frequency, and bias field. Magnetic flux density was found to vary by typically 20% across a partial-height ferrite slab. Experimental phase-shift data agreed to within 5% of numerical calculations for a 9.25-GHz device. Supplementary design data are presented for the first higher order mode in the cutoff plane, the effect of material properties on phase shift, and to compare below and above resonance operation

Keywords

ferrite circulators; ferrite phase shifters; ferrite-loaded waveguides; finite element analysis; magnetic flux; magnetic microwave devices; microwave phase shifters; rectangular waveguides; waveguide theory; 9.25 GHz; bias field; combined magnetostatic/microwave FEM; differential phase-shift sections; ferrite slab loaded rectangular waveguide; ferrite-slab phase-shift sections; finite-element method; frequency; high-power differential circulators; magnetic flux density; material parameters; partial-height ferrite slab; phase-shift circulators; propagation characteristics; transversely magnetized ferrite slabs; Circulators; Ferrites; Loaded waveguides; Magnetic analysis; Magnetic flux; Magnetic materials; Magnetostatic waves; Microwave devices; Rectangular waveguides; Slabs;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.869011

Filename

869011