Proceedings ArticleDOI
The Development of Superconducting Cavity Stabilized Oscillator
S.R. Stein,J.P. Turneaure +1 more
- pp 414-420
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TLDR
In this article, a very high stability microwave oscillator system was developed which has a high Q superconducting cavity as its frequency determining element and an intermediate frequency discriminator is used to produce a feedback voltage which maintains the oscillator at the center of the cavity resonance.Abstract:
: A very high stability microwave oscillator system was developed which has a high Q superconducting cavity as its frequency determining element. In stabilized oscillator (SCSO), the rf power is generated by a Gunn-Effect oscillator whose frequency is electronically tuned by a varactor diode. An intermediate frequency discriminator is used to produce a feedback voltage which maintains the oscillator at the center of the cavity resonance. An improved stabilization system is now reported which has higher short term stability.read more
Citations
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Journal ArticleDOI
Power stabilized cryogenic sapphire oscillator
TL;DR: In this paper, a power stabilized loop oscillator with active Pound frequency stabilization was used to achieve short-term stability of 3-4/spl times/10/sup -15/ for integration times from 0.3 to 100 s.
Journal ArticleDOI
Superconducting-cavity stabilized oscillators with improved frequency stability
S.R. Stein,J.P. Turneaure +1 more
TL;DR: In this article, X-band microwave oscillators with superconducting niobium cavities with loaded Q's of about 1010 achieved short-term frequency stabilities as low as σ y = 6 × 10-16, and typical long-term fractional frequency drifts of ± 2 × 10 -13 per day.
Journal ArticleDOI
Atomic frequency standards: A survey
TL;DR: A comprehensive survey of atomic frequency standards is presented in this paper, which includes a discussion of the effects of past and current developments on the technical and scientific user community, as well as new techniques to evaluate frequency biases such as those encountered in cesium and hydrogen standards.
Journal ArticleDOI
Ultra-stable performance of the superconducting cavity maser
G.J. Dick,R.T. Wang +1 more
TL;DR: In this paper, the superconducting cavity maser (SCM) oscillator was reported to have frequency stability of parts in 10/sup 5/ for times from 1 s to 10000 s and phase noise of approximately -80 dB/f/sup 3/ was measured.
Proceedings ArticleDOI
High spectral purity X-band source
TL;DR: In this article, an X-band source designed for high order frequency multiplication and precision spectroscopy is presented, where phase noise close to the carrier can be controlled by phase-locking the 10.6 GHz signal to a harmonic of a low-noise quartz crystal controlled oscillator.