In this paper we will present the design and realization of a double sideband SIS heterodyne mixer for the frequency range of 780-950 GHz. A NbTiN high Tc superconductor in combination with aluminum is used for a SIS junction tuning circuit. We use a double side waveguide probe with a fixed backshort tuner design which was optimized by means of a 3D EM-modeling software. Compact mechanical envelope of the mixer allows for a combination of several units in a focal plane array. We will present results of instantaneous bandwidth measurement for seven mixer units and compare it with theoretical predictions. We also present a heterodyne sensitivity test results for these mixers with the best achieved DSB mixer noise temperature of about 250 K (physical temperature 4.2 K) which is only several times higher than a quantum noise limit for these frequencies.


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    Title :

    A Waveguide NbTiN SIS Mixer for THz Array Applications


    Contributors:
    Baryshev, A. M. (author) / Mena, F. P. (author) / Hesper, R. (author) / Zijlstra, T. (author) / Lodewijk, C. F. J. (author) / Wild, W. (author) / Klapwijk, T. M. (author)


    Publication date :

    2006-09-01


    Size :

    1203833 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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