Accession Number : AD0758919

Title :   Ferrites for Low-Cost Phase Shifters.

Descriptive Note : Semiannual technical rept. 1 Jul-31 Dec 72,

Corporate Author : RAYTHEON CO WALTHAM MASS RESEARCH DIV

Personal Author(s) : Van Hook,H. J. ; Green,J. J.

Report Date : APR 1973

Pagination or Media Count : 41

Abstract : (*GARNET, MAGNETIC PROPERTIES), (*PHASE SHIFT CIRCUITS, FERRITES), (*WAVEGUIDE CIRCULATORS, MICROWAVE EQUIPMENT), CRYSTAL GROWTH, BISMUTH COMPOUNDS, CALCIUM COMPOUNDS, VANADIUM COMPOUNDS, ULTRAHIGH FREQUENCY, MICROWAVE FREQUENCY, S BAND, YTTRIUM COMPOUNDS, MAGNETOSTRICTION, ANISOTROPYYTTRIUM IRON GARNETSPolycrystalline Bi-Ca-V garnets have been produced, by conventional ceramic processing and firing, with microwave loss characteristics and hysteresis loop properties of H(c) = 1 Oe and 4(pi)(M sub r) = 400G for a composition having 4(pi)(M sub s) = 600G. This material has proven to be rather stress sensitive and a parallel program has begun to find minor substitutions which reduce magnetostriction. Nickel is only slightly soluble in Calvanbig, Ni = 0.01 to 0.02 per formula unit, and has a marginal effect on magnetostriction and anisotropy. Substitution of Eu and Ru have stronger effects on the anisotropy properties but also increase FMR linewidth. (Author)

Descriptors :   (*GARNET, MAGNETIC PROPERTIES), (*PHASE SHIFT CIRCUITS, FERRITES), (*WAVEGUIDE CIRCULATORS, MICROWAVE EQUIPMENT), CRYSTAL GROWTH, BISMUTH COMPOUNDS, CALCIUM COMPOUNDS, VANADIUM COMPOUNDS, ULTRAHIGH FREQUENCY, MICROWAVE FREQUENCY, S BAND, YTTRIUM COMPOUNDS, MAGNETOSTRICTION, ANISOTROPY

Subject Categories : Electrical and Electronic Equipment
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE