First implementation of the fully superconducting 500 GHz receiver with integrated flux-flow oscillator

VP Koshelets*, SV Shitov, AM Baryshev, AV Shchukin, LV Filippenko, T deGraauw, W Luinge, H vandeStadt, H Schaeffer, J Mygind

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    An integrated quasioptical receiver consisting of a planar double dipole antenna, SIS mixer and a superconducting local oscillator with matching circuits has been designed, fabricated and tested. A Flux-Flow Oscillator (FFO) based on unidirectional viscous flow of magnetic vortices in a long Josephson tunnel junction is employed as a local oscillator. All components of the receiver are integrated on a 4 mm x 4 mm x 0.2 mm crystalline quartz substrate on a base of the same Nb-AlOx-Nb trilayer in one technological run. The receiver has been studied in the frequency range 360 - 490 GHz. A lowest DSB noise temperature of 470 - 560 K has been achieved within the frequency range 425 - 455 GHz. Test circuits each comprising a FFO and a SIS detector have been experimentally investigated at frequencies up to 850 GHz. A new reliable technique for measuring the spectral linewidth of the integrated oscillators has been developed; the possibility of frequency locking of a FFO to an external microwave source has been demonstrated. The spectral linewidth of a FFO has been measured in the frequency range 250 - 580 GHz; a linewidth as low as 200 kHz is obtained at 450 GHz.

    Original languageEnglish
    Title of host publicationApplied Superconductivity 1995
    EditorsD DewHughes
    Place of PublicationBristol
    PublisherIOP PUBLISHING LTD
    Pages731-736
    Number of pages6
    Volume1-2
    ISBN (Print)0-7503-0348-4
    DOIs
    Publication statusPublished - 1995
    Event2nd European Conference on Applied Superconductivity (EUCAS 1995) -
    Duration: 3-Jul-19956-Jul-1995

    Publication series

    NameInstitute of Physics Conference Series
    PublisherIOP Publishing LTD
    Volume148
    ISSN (Print)0951-3248

    Other

    Other2nd European Conference on Applied Superconductivity (EUCAS 1995)
    Period03/07/199506/07/1995

    Keywords

    • SUBMILLIMETER WAVE REGION
    • JOSEPHSON OSCILLATOR
    • MILLIMETER

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