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

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

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...

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Bibliographische Detailangaben
Hauptverfasser: CURRIE,M.R, FORSTER,D.C, HANSEN,J.W
Format: Report
Sprache:eng
Schlagworte:
ANODES (ELECTRON TUBES)
CATHODES (ELECTRON TUBES)
DESIGN
DIODES
ELECTRON BEAMS
ELECTRON GUNS
ELECTRON TUBES
MAGNETIC FIELDS
MEASUREMENT
MICROWAVE EQUIPMENT
NOISE (RADAR)
NOISE (RADIO)
REDUCTION
S BAND
THEORY
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Zusammenfassung: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)