A Ka-band array-fed near-field Cassegrain antenna envisioned for NASA's Solar Probe Mission is the basis of the present spacecraft telecommunications system, which is designed for operation at X-band up/downlink and Ka-band downlink. The hexagonal array employed, which is located at the Cassegrain point of the 0.75-m reflector, encompasses 37 active elements; each of these contains 1/4-W HEMT amplifiers. Relative to a TWTA-based system, this active array feed reduces mass, increases dc power efficiency, enhanced reliability, and reduces volume requirements.


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    Titel :

    Proposed Ka-band array-fed near field Cassegrain system for NASA's Polar Probe Mission


    Beteiligte:
    Kellogg, K. (Autor:in) / Kapoor, V. (Autor:in) / Vacchione, J. (Autor:in) / Rascoe, D. (Autor:in) / Komarek, T. (Autor:in) / Randolph, J. (Autor:in) / Crist, R. (Autor:in)

    Kongress:

    AIAA International Communication Satellite Systems Conference and Exhibit ; 1992 ; Washington, DC, United States


    Erscheinungsdatum :

    1992-01-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch




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