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