Journal article
Phase locking of 270-440 GHz Josephson flux flow oscillators
In
Superconductor Science and Technology
—
1999, Volume 12, Issue 11, pp. 720-722
Abstract
External phase locking of a Josephson flux flow oscillator (FFO) to a 10 MHz reference oscillator is demonstrated experimentally in the frequency range 270-440 GHz. A linewidth as low as 1 Hz (as determined by the resolution bandwidth of the spectrum analyser) has been measured. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction.
The combination of narrow linewidth, wide band tunability and low noise is important for spectral radio astronomy applications.
| Language: | English |
|---|---|
| Publisher: | IOP Publishing |
| Year: | 1999 |
| Pages: | 720-722 |
| ISSN: | 13616668 and 09532048 |
| Types: | Journal article |
| DOI: | 10.1088/0953-2048/12/11/309 |
| ORCIDs: | Mygind, Jesper |
