Accession Number : AD0261672

Title :   STUDY OF LOW-NOISE MICROWAVE TUBES. NEW APPROACHES TO THE LOW-NOISE PROBLEM

Corporate Author : HUGHES AIRCRAFT CO CULVER CITY CALIF

Personal Author(s) : CURRIE,M.R. ; FORSTER,D.C. ; HANSEN,J.W.

Report Date : 14 JUN 1961

Pagination or Media Count : 1

Abstract : INTRODUCING A MULTIVELOCITY REGION BY DEPRESSING THE POTENTIAL OF A LOW-NOISE ELECTRON BEAM WHICH IS FIRST ACCELERATED TO A MONOENERGETIC CONDITION WAS INVESTIGATED EXPERIMENTALLY. No reduction in beam noisiness was observed. It was found that the formation of a virtual cathode in the monoenergetic region increases beam noisiness. An experiment is discussed in which the multivelocity region of the diode of a low-noise gun is extended beyond that of the conventional low-noise gun. The first experimental tube incorporating this feature produced encouraging results even though cathode emission was weak. Evidence of the extension of the low velocity drift region was obtained. (Author)

Descriptors :   *ELECTRON GUNS, *ELECTRON TUBES, *MICROWAVE EQUIPMENT, ANODES (ELECTRON TUBES), CATHODES (ELECTRON TUBES), DESIGN, DIODES, ELECTRON BEAMS, MAGNETIC FIELDS, MEASUREMENT, NOISE (RADAR), NOISE (RADIO), REDUCTION, S BAND, THEORY

Distribution Statement : APPROVED FOR PUBLIC RELEASE