1963 | OriginalPaper | Buchkapitel
Artificial high temperature sources for noise modeling studies
verfasst von : J. R. Whinnery, M. A. Pollack
Erschienen in: Microwaves
Verlag: Macmillan Education UK
Enthalten in: Professional Book Archive
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Al though much progress has been made in the understanding of the high-frequency noise behaviour of electron streams [1], many problems remain, especially in the correlation of theory with experiment in the low-velocity region. Perhaps the major difficulty results from the fact that most experiments must be made in the high-velocity region through the determination of induced noise current, noise figure, or correlation coefficients in the accelerated beam. Deductions may then be made concerning conditions in the low-velocity region, but often the deductions are not unique.