PROPAGATION CHARACTERISTIC OF A FERRITE IMAGE GUIDE

The propagation of electromagnetic waves in a ferrite image line was t heoretically formulated. The formulation was based upon the effective permeability approach. The ferrite image line consisted of an insulati ng slab of ferrite with a rectangular cross section overlaid on an ele ctrical ground plane. The ferrite was purposely magnetically biased so that FMR coincided with the band of frequencies in which propagation is allowable in the waveguide structure. Insertion loss and phase shif ts of the electromagnetic wave signal was calculated as a function of frequency. We suggest that ferrite phase shifters, isolators, filters, and switches operating at the millimeters wavelength may be feasible using this guided structure.