Accession Number : AD0440034

Title :   MICROWAVE NONLINEAR DIELECTRIC MATERIALS.

Descriptive Note : Quarterly progress rept. no. 2, 15 Dec 6314 Mar 64,

Corporate Author : RAYTHEON CO WALTHAM MASS

Personal Author(s) : Waugh,J. S. ; Harris,M. ; Nutter,P. B.

Report Date : 14 MAR 1964

Pagination or Media Count : 30

Abstract : Ceramic sample preparation techniques have been improved through a number of techniques which include the use of BST-50 milling balls and long milling times. The dielectric nonlinearity of stannate- and alumina-doped BST-50 prepared by these techniques have been measured and compared with earlier materials. A tentative correlation between doping and nonlinearity is made. Undoped control samples show a definite increase in nonlinearity over previous undoped materials. Measurements of the dielectric constant and loss tangent of BST-50 near the Curie temperature have been made, using a self-resonant pillbox sample with differentially chopped bias. The errors and omission caused by frequency-dependent coupling are discussed. (Author)

Descriptors :   (*CERAMIC MATERIALS, MICROWAVE EQUIPMENT), (*DIELECTRICS, CERAMIC MATERIALS), DIELECTRIC PROPERTIES, S BAND, IMPURITIES, BARIUM COMPOUNDS, TITANATES, STANNATES, NONLINEAR SYSTEMS, ALUMINUM COMPOUNDS, OXIDES, K BAND, STRONTIUM COMPOUNDS, MATERIALS, BALL MILLS, HIGH TEMPERATURE, MICROWAVE FREQUENCY, COMPLEX COMPOUNDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE