1.
Rev Sci Instrum
; 81(6): 064702, 2010 Jun.
Article
in English
| MEDLINE
| ID: mdl-20590256
ABSTRACT
We developed a novel technique for accurate phase synchronization of microwave oscillators based on sapphire dielectric resonators cooled to liquid nitrogen temperature. The achieved quality of phase synchronization (a few milliradians) enables the accurate measurements of extremely weak phase fluctuations expected from the next generation of ultralow phase noise microwave oscillators.