| Zugriffsnummer | 20591 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | A new 9-GHz synthesis chain for atomic fountain clocks |
| Autor(in); Institution |
Sen Gupta, Amitava; NPL, New Delhi, INDIA
Schröder, Roland; 4.4, Zeit und Frequenz, PTB-Braunschweig
Weyers, Stefan; 4.4, Zeit und Frequenz, PTB-Braunschweig
Wynands, Robert; 4.4, Zeit und Frequenz, PTB-Braunschweig
|
| Quelle/Jahr | TimeNav'07 : Geneva International Conference Center, Switzerland, 29 May - 1 June 2007:(2007) |
| Availability | [CD-ROM] ; file name: PDFS\\papers\\055_7056.pdf |
| ISBN | 1-4244-0647-1 |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | European Frequency and Time Forum, Geneva, 29, May - 01, June, 2007, Switzerland |
| Freie Schlagworte | Microwave synthesizer chain ; 9.192 GHz ; Cooperation PTB and NPL, India |
| Zusammenfassung | We describe a new microwave synthesizer chain to produce the 9.192 GHz Cs frequency currently being developed in a cooperation of PTB and NPL India. In this synthesis a 9600 GHz YIG oscillator is locked to a 5 MHz quartz oscillator via a divider chain (9600 : 8 : 3 : 4 : 20). Along the way, a signal of 407.37 MHz is generated with the help of direct digital synthesis (DDS). The required interrogation frequency is obtained by mixing (9600 MHZ - 407.37 MHz = 9192.63 MHz). The signal from the atoms is then used to steer the 5 MHz quartz frequency. We discuss the preliminary results of studies of the metrological features - namely, he spectral purity, phase noise and the long term phase stability - of the few prototype units constructed so far. |
