Accession Number : AD0738834
Title : UHF Ferrites (Garnets).
Descriptive Note : Semiannual technical rept. 1 May-31 Dec 71,
Corporate Author : RAYTHEON CO WALTHAM MASS RESEARCH DIV
Personal Author(s) : Hook,H. J. Van ; Green,J. J.
Report Date : JAN 1972
Pagination or Media Count : 79
Abstract : Two objectives have been defined for the performance of this contract. The first is the development of a low loss temperature stable magnetic garnet for an above resonance microwave UHF circulator. The second is to develop an S-band phase shifter material which would offer some improvement in temperature stability and lower materials cost over presently available ferrites. Dense, single phase garnet has been produced with the composition Y 1(.70)Ca(1.30)In(.35)V(.65)Fe(4.00)O(12). A survey has been made of the garnet and spinel S-band phase-shifter materials. A processing study has been started on a calcium-vanadium substituted YIG. Compositions with and without manganese substitutions have been prepared to explore the effect on remanent magnetization and stress sensitivity. (Author)
Descriptors : (*FERRITES, MAGNETIC PROPERTIES), (*WAVEGUIDE CIRCULATORS, MICROWAVE EQUIPMENT), (*PHASE SHIFT CIRCUITS, FERRITES), GARNET, YTTRIUM COMPOUNDS, MICROWAVE FREQUENCY, ULTRAHIGH FREQUENCY, MAGNETIC PROPERTIES, CALCIUM COMPOUNDS, INDIUM COMPOUNDS, VANADATES, S BAND
Subject Categories : Electrical and Electronic Equipment
Solid State Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE