Title :
Ferrite rotary-field phase shifters with reduced cross-section
Author :
Boyd, C.R., Jr. ; Oness, C.M.
Author_Institution :
Microwave Applications Group, Santa Maria, CA, USA
Abstract :
Practical ferrite rotary-field phase shifters can be built for the 1.3-GHz frequency region by using a reduced-diameter circular waveguide in which disks of high dielectric constant material and ferrite-filled sections alternate. This approach permits reduction of the guide diameter to about half that needed for uniform filling with garnet material only. Experimental results for feasibility-study units at 2.5 GHz and 1.3 GHz confirm that the reduced-diameter configuration can produce high phase setting accuracy, but with increased insertion loss.<>
Keywords :
circular waveguides; dielectric-loaded waveguides; ferrite devices; phase shifters; solid-state microwave devices; waveguide components; 1.3 GHz; 2.5 GHz; ferrite rotary-field phase shifters; ferrite-filled sections; high dielectric constant material; insertion loss; phase setting accuracy; reduced-diameter circular waveguide; reduced-diameter configuration; Dielectrics; Ferrites; Filling; Frequency; Garnets; Magnetic materials; Magnetic separation; Permeability; Phase shifters; Transformers;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99749
