NASA NTRS · 19940000101
Hydrogen-Maser/Ruby-Maser/Quartz-Crystal Oscillator
Abstract
Highly stable oscillator suitable for use as 100-MHz frequency standard consists of 100-MHz hydrogen maser combined with double-phase-locked-loop receiver. Generates 100-MHz signal with reduced noise. Contains 100-MHz voltage-controlled quartz-crystal oscillator (VCO) locked in phase to superconducting-cavity maser oscillator (SCMO). SCMO, locks in phase to hydrogen maser, phase-locking receiver and its SCMO/ VCO combination to hydrogen maser. Aspects of SCMO described in previous reports, including "Performance of Superconducting-Cavity Maser" (NPO-18175), NASA Tech Briefs, Vol. 15, No. 6. Performances of component oscillators complement each other.
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Wang, Rabi T., Dick, G. John. 1994-02-01. Hydrogen-Maser/Ruby-Maser/Quartz-Crystal Oscillator. https://ntrs.nasa.gov/citations/19940000101
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