| Автор | A M Baryshev |
| Автор | A V Yulin |
| Автор | V V Kurin |
| Автор | V P Koshelets |
| Автор | P N Dmitriev |
| Автор | L V Filippenko |
| Дата выпуска | 1999-11-01 |
| dc.description | Josephson flux-flow oscillators (FFOs) have been used as an on-chip local oscillator at frequencies up to 650 GHz. An autonomous FFO linewidth of about 1 MHz was measured in the resonant regime at V<sub>b</sub><950 µV for niobium-aluminium oxide-niobium tunnel junctions, while considerably larger values were reported at higher voltages. To overcome this fundamental linewidth broadening we propose an on-chip Cherenkov radiation flux-flow oscillator (CRFFO). It consists of a long Josephson junction and a superconducting slow-wave transmission line that modifies significantly the junction dispersion relation. Two superconductor-insulator-superconductor junction detectors are connected to both the long Josephson junction and the slow-wave line to determine the available microwave power. The power is measured at different CRFFO biasing conditions. Both a forward wave and a backward wave oscillation regime are observed. An FFO and a CRFFO with the same junction parameters are compared. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Forward and backward waves in Cherenkov flux-flow oscillators |
| Тип | paper |
| DOI | 10.1088/0953-2048/12/11/381 |
| Electronic ISSN | 1361-6668 |
| Print ISSN | 0953-2048 |
| Журнал | Superconductor Science and Technology |
| Том | 12 |
| Первая страница | 967 |
| Последняя страница | 969 |
| Выпуск | 11 |
