CRYOGENIC SAPPHIRE MICROWAVE RESONATOR-OSCILLATOR WITH EXCEPTIONAL STABILITY

Authors
LUITEN AN MANN AG BLAIR DG
Citation
An. Luiten et al., CRYOGENIC SAPPHIRE MICROWAVE RESONATOR-OSCILLATOR WITH EXCEPTIONAL STABILITY, Electronics Letters, 30(5), 1994, pp. 417-419
Citations number
8
Categorie Soggetti
Engineering, Eletrical & Electronic
Journal title
Electronics Letters → ACNP
ISSN journal
00135194
Volume
30
Issue
5
Year of publication
1994
Pages
417 - 419
Database
ISI
SICI code
0013-5194(1994)30:5<417:CSMRWE>2.0.ZU;2-S
Abstract
Microwave oscillators of exceptional short term stability have been re alised from cryogenic sapphire resonators with loaded Q-factors of 10( 9) at X-band and 6K by employing a synthesis of loop oscillator operat ion with active Pound frequency stabilisation. These oscillators have exhibited a fractional frequency stability of 3-4 x 10(-15) for integr ation times from 0.3 to 100 degrading to 10(-14) at 1000s, and long te rm drifts of a few parts in 10(13) per day.