Accession Number : AD0427300


Title :   DEVELOPMENT OF A HIGH FREQUENCY ELECTRON-BEAM PARAMETRIC AMPLIFIER.


Descriptive Note : Quarterly progress rept. no. 9, 1 Jul-30 Sep 63,


Corporate Author : ZENITH RADIO CORP CHICAGO ILL


Personal Author(s) : Everett,Peter G ; Larsen,Roy A


Report Date : 30 Sep 1963


Pagination or Media Count : 24


Abstract : In a tube rebuilt with a 0.010-in. diameter cathode, the fast cyclotron wave excess temperature at the output coupler with the input coupler matched was 570 deg. K. The measurement was made with the 8 db noise figure radiometer system because of difficulty encountered with the pump circuit of the degenerate parametric amplifier under construction. A more precise measurement will be made on completion of the reactance amplifier but it is considered that the above temperature precludes any use of such beams in low noise amplifiers. Results of an analysis of slow cyclotron wave traveling wave tubes are presented. The conclusion reached is that low temperature cyclotron waves produced by high cathode magnetic fields are not likely to be useful in traveling wave tubes except perhaps at signal frequencies below 1000 Mc. Design of the L-band low noise DC-pumped tube incorporating a low noise beam from a cathode immersed in a high magnetic field has been completed and two tubes constructed. Measurements on the tubes are discussed. (Author)


Descriptors :   X BAND , PARAMETRIC AMPLIFIERS , TRAVELING WAVE TUBES , MAGNETIC FIELDS , PUMPING(ELECTRONICS) , L BAND , NOISE(RADAR) , GAIN , ELECTRON BEAMS , CATHODES(ELECTRON TUBES) , PHYSICAL PROPERTIES , PERFORMANCE(ENGINEERING) , TEMPERATURE


Distribution Statement : APPROVED FOR PUBLIC RELEASE