Title :
Attainment of a low-noise high-power and highly stable Gunn oscillator by coupling to a superconducting cavity
Author :
Jimenez, J.J. ; Benard, J. ; Sudraud, P. ; Septier, A.
Author_Institution :
Universite Paris-XI, Centre d´´ORSAY, France
Abstract :
A 100-mW Gunn-diode oscillator has been coupled to a 5 × 108Q factor superconducting Nb cavity. The frequency stability is then improved up to 1.8 × 10-11over a measuring time of 10s. The long-term frequency shift is removed by placing the cavity in a constant pressure vessel cooled by the He bath. The FM noise has been measured at modulating frequencies as close to the carrier as 0.1 Hz.
Keywords :
Frequency measurement; Frequency modulation; Gunn devices; Helium; Niobium; Oscillators; Q factor; Stability; Superconducting device noise; Time measurement;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1973.8981
