Title :
Ultra-stable performance of the superconducting cavity maser
Author :
Dick, G.J. ; Wang, R.T.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
Measurements on the superconducting cavity maser (SCM) oscillator that show frequency stability of parts in 10/sup 5/ for times from 1 s to 10000 s are reported. A phase noise of approximately -80 dB/f/sup 3/ was measured. This short- and midterm performance is believed to be better than that of any known microwave oscillator. In particular, stability at a measuring time of 1 s is ten times better than that of a hydrogen maser, and phase noise is more than 20 dB below that of the best multiplied quartz crystal oscillators.<>
Keywords :
frequency measurement; frequency stability; low-temperature techniques; masers; measurement standards; microwave measurement; microwave oscillators; random noise; superconducting devices; time measurement; cryogenic oscillator; frequency stability; frequency standard; maser; microwave oscillator; phase noise; superconducting cavity; time standard; Frequency measurement; Masers; Microwave oscillators; Noise measurement; Particle measurements; Phase measurement; Phase noise; Stability; Superconducting device noise; Superconducting microwave devices;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.109898
