Title :
Cryogenic sapphire oscillator with exceptionally high frequency stability
Author :
Mann, A.G. ; Chang Sheng ; Luiten, A.N.
Author_Institution :
Dept. of Phys., Western Australia Univ., Nedlands, WA, Australia
Abstract :
Extremely high short-term frequency stability has been realised in oscillators based on liquid helium cooled sapphire resonators with a modified mounting structure. These oscillators have exhibited an Allan deviation of about 5.4/spl times/10/sup -16//spl tau//sup -1/2/ for integration times (/spl tau/) of 1 to 4 s and a minimum of 2.4/spl times/10/sup -16/ at 32 s.
Keywords :
dielectric resonator oscillators; frequency stability; frequency standards; microwave measurement; sapphire; Allan deviation; cryogenic sapphire oscillator; high short-term frequency stability; liquid helium cooled sapphire resonators; microwave frequency standard; modified mounting structure; servo control; whispering gallery mode; Cryogenics; Frequency; Helium; Oscillators; Phase modulation; Phase noise; Pollution measurement; Stability; Superconducting device noise; Temperature;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.850939
