Title :
Improved performance of a temperature compensated LN2 cooled sapphire oscillator
Author :
Santiago, David G. ; Wang, Rabi T. ; Dick, G. John
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
fDate :
31 May-2 Jun 1995
Abstract :
We report on improved stability in a whispering gallery sapphire resonator for which the dominant WGHnll microwave mode family shows frequency-stable, compensated operation for temperatures above 77 K. Several modifications during the past year have led to significant improvements in performance. Current tests with improved thermal stability provide Allan Deviation of frequency of 2.6-4·10-13 for measurement times of 1⩽τ⩽100 seconds. We project a frequency stability of 10-14 for this resonator with stabilized housing temperature and with a mode Q of 107
Keywords :
circuit stability; compensation; cryogenic electronics; dielectric resonator oscillators; microwave oscillators; sapphire; 77 K; Al2O3; Allan Deviation; LN2 cooling; Q factor; frequency stability; housing temperature; microwave modes; sapphire oscillator; temperature compensation; thermal stability; whispering gallery resonator; Copper; Dielectric constant; Laboratories; Local oscillators; Microwave oscillators; Propulsion; Resonant frequency; Stability; Temperature; Vibrations;
Conference_Titel :
Frequency Control Symposium, 1995. 49th., Proceedings of the 1995 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-2500-1
DOI :
10.1109/FREQ.1995.483926
