Title :
Ferrite phase shifters using stress insensitive garnet materials
Author :
Vaughn, J.T. ; Cox, P.R. ; Rodrigue, G.P. ; Harrison, G.R.
Author_Institution :
EMS Technol. Inc., Atlanta Norcross, GA, USA
Abstract :
Stable hysteresis characteristics of ferrimagnetic materials are critical to the RF performance of microwave ferrite toroidal phasers. Particularly troublesome is the magnetostrictive characteristics where the hysteresis properties are altered by stress. This paper presents the results of a study addressing Mn/sup +3/ substitutions in garnets to improve the resultant magnetostrictive characteristics in order to achieve stress insensitive performance in waveguide toroidal phasers.<>
Keywords :
ferrite devices; gadolinium compounds; garnets; magnetic hysteresis; magnetostriction; phase shifters; yttrium compounds; RF performance; Y/sub 1.7/Gd/sub 1.3/Fe/sub 5-x/Mn/sub x/O/sub 12/; Y/sub 1.7/Gd/sub 1.3/Fe/sub 5/MnO/sub 12/; ferrite phase shifters; hysteresis characteristics; magnetostrictive characteristics; microwave ferrite toroidal phasers; stress insensitive garnet materials; Ferrimagnetic materials; Ferrites; Garnets; Hysteresis; Magnetic materials; Magnetostriction; Phase shifters; Radio frequency; Stress; Toroidal magnetic fields;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335351
