Test results are presented of the Band 3 module integrated into the Atacama large millimeter array (ALMA) front end receiver. The 84 to 116 GHz collected signal by the Band 3 receiver is split into two orthogonal polarisations using an orthomode transducer and then down-converted to 6 GHz over 4 GHz bandwidth using sideband separating mixers with better than 10 dB of image rejection. The single sideband system's low noise of 35 to 45 K is achieved by cascading superconductor-insulator-superconductor (SIS) mixers and low noise cryogenic amplifiers that consist of three stage high mobility transistors (HEMT) operating at 4 K.


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    Titel :

    The Band 3 receiver (84-116 GHz) for ALMA


    Beteiligte:
    Claude, S. (Autor:in) / Dindo, P. (Autor:in) / Erickson, D. (Autor:in) / Jiang, F. (Autor:in) / Yeung, K. (Autor:in) / Derdall, D. (Autor:in) / Duncan, D. (Autor:in) / Garcia, D. (Autor:in) / Henke, D. (Autor:in) / Leckie, B. (Autor:in)


    Erscheinungsdatum :

    2005-01-01


    Format / Umfang :

    1220722 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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