ECOM 02032 - 4 CQl RESEARCH ON DISTRIBUTED FERRITES FOR CROSSED - FIELD MICROWAVE DEVICES QUARTERLY REPORT

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 die study of hot pressing techniques for the bondiug of ferrites to alumina. The •esults 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 year's work suggest that good rf performance is fairly easy to achieve but that the demonstration of diese properties in an actual CFA must await solution of the technological problems of bonding and exposure of the ferrites to tube brazing conditions. The major aim of the second year will be the realization of hot tests at Die earliest possible time.