www.microwavejournal.com/articles/28746-new-class-of-ultraprecise-quartz-oscillators-combining-lowest-noise-and-minimal-allan-deviation

New Class of Ultraprecise Quartz Oscillators Combining Lowest Noise and Minimal Allan Deviation
July 14, 2017
Operation of modern telecom, navigation, control and measurement systems requires reference frequency sources. Their performance actually determines the systems’ main characteristics. Frequency stability vs. temperature, long-term and short-term stabilities, and phase noise are the most important for many applications.