Title :
Optimization of the phase-locked flux-flow oscillator for the submm integrated receiver
Author :
Koshelets, Valery P. ; Dmitriev, Pavel N. ; Ermakov, Andrey B. ; Sobolev, Alexander S. ; Torgashin, Mikhail Yu ; Kurin, Vladislav V. ; Pankratov, Andrey L. ; Mygind, Jesper
Author_Institution :
Inst. of Radio Eng. & Electron., Russian Acad. of Sci., Groningen, Netherlands
fDate :
6/1/2005 12:00:00 AM
Abstract :
The Superconducting Integrated Receiver (SIR) comprises in one chip a planar antenna integrated with an SIS mixer, a superconducting Flux Flow Oscillator (FFO) acting as Local Oscillator (LO) and a second SIS harmonic mixer (HM) for FFO phase locking. Free-running FFO linewidth well below 10 MHz is required to ensure phase-locked operation of an SIR. Comprehensive experimental study of the Nb-AlOx-Nb FFO linewidth and other main parameters has been carried out in order to achieve this goal. Essential dependence of the FFO linewidth on its width and idle region dimension has been found. It makes possible an optimization of the FFO design and selection of the best FFO parameters for practical operation of the SIR.
Keywords :
aluminium compounds; circuit optimisation; niobium; phase locked oscillators; submillimetre wave receivers; superconducting integrated circuits; superconducting processor circuits; superconductor-insulator-superconductor mixers; Josephson junctions; Nb-AlO-Nb; SIS harmonic mixer; SIS mixer; flux-flow oscillator; optimization; phase-locked oscillator; planar antenna; submillimeter wave integrated circuits; submm integrated receiver; superconducting devices; superconducting flux flow oscillator; superconducting integrated receiver; Design optimization; Frequency; Josephson junctions; Local oscillators; Phase locked loops; Physics; Planar arrays; Spectroscopy; Superconducting devices; Superconducting integrated circuits; Josephson junctions; phase-locked oscillators; submillimeter wave integrated circuits; superconducting devices;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.850140
