Title :
Microwave interrogation system for VNIIFTRI cesium fountain
Author :
Boyko, A. ; Kopylov, L. ; Novoselov, A.
Author_Institution :
Inst. for Metrol. of Time & Space (IMVP FGUP “VNIIFTRI”), Mendeleevo, Russia
Abstract :
The input signal of the system is 5 MHz with a high long-term stability. 5 MHz quartz crystal oscillator of improved short-term stability (~2·10-13/1sec) is phase-locked to the input signal and controls, in turn, 1530 MHz oscillator. The 6-th harmonics of 1530 MHz signal forms 9.180 GHz interrogation signal. As essential point of developed system is that the H-maser of increased output power (~1·10-12 W) is used for further lowering of interrogation signal phase noise.
Keywords :
UHF oscillators; atomic clocks; crystal oscillators; masers; microwave oscillators; phase locked oscillators; phase noise; stability; H-maser system; VNIIFTRI cesium fountain; frequency 1530 MHz; frequency 5 MHz; frequency 9.180 GHz; interrogation signal phase noise; long-term stability; microwave interrogation system; phase-locked input signal; quartz crystal oscillator; short-term stability; Frequency measurement; Frequency synthesizers; Generators; Masers; Microwave amplifiers; Oscillators; Synthesizers;
Conference_Titel :
Frequency and Time Forum (EFTF), 2006 20th European
Conference_Location :
Braunschweig
Print_ISBN :
978-1-4673-2642-1
