Title :
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
fDate :
9/1/2000 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
