Title :
Concerning the Noise Figure of a Backward-Wave Amplifier
Author_Institution :
Res. and Dev. Labs., Hughes Aircraft Co., Culver City, Calif.
fDate :
4/1/1955 12:00:00 AM
Abstract :
The noise figure of a traveling-wave amplifier has been derived as a function of circuit loss and space charge. The minimum-obtainable noise figure of the backward-wave amplifier is shown to be the same as the minimum-obtainable noise figure of the forward-wave amplifier, i.e., about 6 db. The noise figure of an ordinary backward-wave amplifier has been measured as a function of gain. The calculated noise figure checks well with the measured values.
Keywords :
Circuit noise; Electron beams; Electron tubes; Noise figure; Noise level; Noise measurement; Noise reduction; Oscillators; Power amplifiers; Space charge;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1955.278192
