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

Author

Koshelets, V.P. ; Shitov, S.V. ; Shchukin, A.V. ; Filippenko, L.V. ; Mygind, J.

Author_Institution

Inst. of Radio Eng. & Electron., Acad. of Sci., Moscow, Russia

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

2905

Lastpage

2908

Abstract

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.

Keywords

aluminium compounds; flux flow; niobium; spectral line breadth; submillimetre wave oscillators; submillimetre wave receivers; superconducting junction devices; 600 GHz; DC I-V characteristics; Josephson self-pumping effect; Nb-AlO-Nb; Nb-AlO/sub x/-Nb FFO; frequency locked flux flow oscillator; harmonic mixing; microwave properties; spectral linewidth; submillimeter wave integrated receiver; Extraterrestrial measurements; Frequency; Magnetic fields; Oscillators; Receivers; Submillimeter wave technology; Superconducting device noise; Superconducting devices; Superconducting microwave devices; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621904

Filename

621904