Title :
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
fDate :
6/1/1997 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
