Linewidth of frequency locked flux flow oscillators for sub-mm wave receivers

Presently Flux Flow Oscillators (FFOs) are being developed for integration with superconductor-insulator-superconductor (SIS) mixers intended for submillimeter wave integrated receivers. Here we report on a detailed study of the dc and microwave properties of Nb-AlO/sub x/-Nb FFOs. A model based on...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 1997-06, Vol.7 (2), p.2905-2908
Main Authors: Koshelets, V.P., Shitov, S.V., Shchukin, A.V., Filippenko, L.V., Mygind, J.
Format: Article
Language:English
Subjects:
Extraterrestrial measurements
Frequency
Magnetic fields
Oscillators
Receivers
Submillimeter wave technology
Superconducting device noise
Superconducting devices
Superconducting microwave devices
Voltage
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Summary:Presently Flux Flow Oscillators (FFOs) are being developed for integration with superconductor-insulator-superconductor (SIS) mixers intended for submillimeter wave integrated receivers. Here we report on a detailed study of the dc and microwave properties of Nb-AlO/sub x/-Nb FFOs. A model based on the Josephson self-pumping effect is proposed for explanation of the experimentally measured dc I-V curves (IVC). Extensive measurements of the spectral linewidth of the radiation emitted from a FFO have been performed up to 600 GHz using a new reliable technique based on harmonic mixing. The results are compared to recent theoretical predictions.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.621904