Accession Number : AD0477494
Title : CRYOELECTRIC RECEIVER TECHNIQUES.
Descriptive Note : Final rept. 30 Dec 63-30 Jun 65,
Corporate Author : RCA LABS PRINCETON NJ
Personal Author(s) : Burns, Leslie L. ; Alphonse, Gerald A. ; Bura, Paul ; Leck, George W.
Report Date : JAN 1966
Pagination or Media Count : 70
Abstract : Investigations were carried out in cryotron, tunneling, and parametric-type amplifiers. The parametric approach appeared most promising. Theoretical analyses indicated that transmission line structure could be designed to serve as a traveling-wave parametric amplifier with a noise figure comparable to or better than an equivalent maser. The immediate goal, however, was to develop a parametric amplifier having a bandwidth of one octave, 1.4 to 2.8 Gc/s, with a minimum gain of 13 Db over this broad band. The best structure obtained resulted in a bandwidth of 1000 Mc/s in the desired band. Achieving the desired bandwidth is an engineering design and fabrication problem but it is not a fundamental limitation. Obtaining the necessary gain is a more fundamental problem because it requires the fabrication of very thin (300-500 Angstroms) low loss insulating films, and fabrication of high quality, very thin (400-500 Angstroms) tin films that are continuous and smooth. Using superconducting fins in a coaxial structure has resulted in a gain as high as 27 Db over a 2 Mc/s bandwidth and avoids the problem of impedance matching. The final recommendation is that further work be conducted on film fabrication technology. (Author)
Descriptors : , (*MICROWAVE AMPLIFIERS, TRAVELING WAVE TUBES), PARAMETRIC AMPLIFIERS, SUPERCONDUCTORS, SUPERCONDUCTIVITY, TRANSMISSION LINES, GAIN, NOISE(RADIO), MANUFACTURING, MICROWAVES, THEORY, BROADBAND, PUMPING(ELECTRONICS), MATHEMATICAL ANALYSIS, ELECTRIC FIELDS.
Subject Categories : ELECTRICAL AND ELECTRONIC EQUIPMENT
Distribution Statement : APPROVED FOR PUBLIC RELEASE