DOUBLE RIDGED WAVE-GUIDE PHASE SHIFTERS FOR BROAD-BAND APPLICATIONS

This paper presents an electromagnetic mode matching analysis of dual ridged waveguide phase shifters. The waveguide is loaded with a high d ielectric material between the ridges, and the troughs are filled with ferrite toroids. The present structure offers nearly twice the bandwi dth and less variation in nonreciprocity versus frequency as compared to the conventional dual toroidal phase shifter. An optimum design tha t maximizes nonreciprocity has been found. Effects of the dielectric c onstant and the trough dimensions are also presented. A differential p hase shift of more than 100-degrees/cm has been predicted for the new phase shifter.