Accession Number : AD0422926

Title :   STUDY OF INTERACTION STRUCTURES LEADING TO DEVELOPMENT OF X-BAND CROSSED-FIELD AMPLIFIER.

Descriptive Note : Quarterly progress rept. no. 1, 28 June28 Sep 63.

Corporate Author : WARNECKE ELECTRON TUBES INC DES PLAINES ILL

Report Date : 28 SEP 1963

Pagination or Media Count : 1

Abstract : The construction of a 2 kilowatt CW crossed-field Amplifier in X-band requires the study of a slow wave structure having a delay ratio (c/vph) of the 6rder of 20. This corresponds to a structure having a pitch of the order of 0.4 millimeters. The slow wave structure must also be capable of dissipating additional kilowatts of energy, irregularly distrubuted in the form of heat over its surface of a few square centimeters. The type of structure which seems to be the most encouraging is that of a planar delay line mounted on a ceramic base having good heat conduction properties, such as alumina or beryllium oxide. The very small dimensional tolerances required of such a line can be obtained by the use of photoforming techniques. It is important as well to make use of structures as physically large as possible, to assist in the manufacturing technology, and in the heat dissipation problems. This gives rise to consideration of the use of one or more simple structures in parallel, in order to handle the total power. Efforts were concerned with following: (a) study of the fenced line (a multi-dimensional line which can be made larger than a comparable meander line). (b) study of the technology for producing ceramic delay lines. (Author)

Descriptors :   (*MICROWAVE AMPLIFIERS, X BAND), DELAY LINES, CERAMIC MATERIALS, IMPEDANCE MATCHING, SPARK MACHINING, ATTENUATION, DIELECTRIC PROPERTIES, ALUMINUM COMPOUNDS, DIOXIDES, COPPER, THERMAL CONDUCTIVITY, PRODUCTION, MANUFACTURING, TANTALUM, GRAPHITE

Distribution Statement : APPROVED FOR PUBLIC RELEASE