Title :
Near carrier noise in TWT amplifiers
Author :
Ashley, J.Robert ; Rast, G.J. ; Barley, T.A.
Author_Institution :
Univ. of Colorado, Colorado Springs, CO, USA
Abstract :
Near carrier amplitude and phase noise modulations have been measured for low noise (receiving type) and medium power (20 w) TWT amplifiers at 6 GHz. The measured noise is greater than predicted by the noise figure measured 30 MHz from the carrier. Below 20 kHz, at least part of the excess can be accounted for by phase modulation products coherent with the power line frequency.
Keywords :
phase modulation; phase noise; travelling wave amplifiers; travelling wave tubes; TWT amplifiers; frequency 30 MHz; frequency 6 GHz; near carrier amplitude; near carrier noise; noise figure; phase modulation products; phase noise modulation; power 20 W; power line frequency; Abstracts; Atmospheric measurements; Cavity resonators; Detectors; Noise; Noise measurement; Particle measurements;
Conference_Titel :
Electron Devices Meeting (IEDM), 1974 International
Conference_Location :
Washington, DC
DOI :
10.1109/IEDM.1974.6219808
