RESEARCH ON DISTRIBUTED FERRITES FOR CROSSED-FIELD MICROWAVE DEVICES
Quarterly rept. no. 4, 10 Nov 1966-9 Feb 1967
RAYTHEON CO WALTHAM MA MICROWAVE AND POWER TUBE DIV
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The objective of this program is to develop the knowledge and technology necessary to take full advantage of the unidirectional attenuative properties of ferrites in achieving improved gain and bandwidth in crossed-field microwave amplifiers and oscillators. During this fourth quarterly period, activities included further cold testing of ferrite materials in the L-band cold test vehicle and in the S-band QKS1267 Amplitron. A number of brazing experiments were carried out, and considerable effort was expended in the study of hot pressing techniques for the bonding of ferrites to alumina. The results were promising. The results of both theoretical and experimental studies of broadbanding have been encouraging. In particular, desirable properties have been demonstrated over half an octave in S-band with a porous manganese ferrite. The results of the first years work suggest that good rf performance is fairly easy to achieve but that the demonstration of these properties in an actual CFA must await solution of the technological problems of bonding and exposure of the ferrites the brazing conditions. The major aim of the second year will be the realization of hot tests at the earliest possible time.
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