AbstractCommunications transponder for the Japanese Communications Satellite-2 (CS-2a and 2b) to be launched into a geostationary orbit by N-II launch vehicle in February and August, 1983, has been developed. The transponder is provided with six-channel K-band ( 30 20 GHz ) transponder including beacon transmitter, which operates in the highest frequency ranges ever utilized on an operational communications satellite, and two-channel C-band ( 6 4 GHz ) transponder. Receiver front end of the K-band transponder consists of a direct mixer followed by a 1.8 GHz IF amplifier and provides 8 dB noise figure. 20 GHz output power is 4 W by final amplification at 5-W TWTA. C-band transponder provides 4 dB noise figure and 4.3-W output power. Key factors for future high capacity transponder are also presented.


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    Title :

    Communications transponder performance for Japanese Communications Satellite-2 and prospects for future systems


    Contributors:
    Okamoto, T. (author) / Suzuki, E. (author) / Nagai, Y. (author) / Kasuga, Y. (author)

    Published in:

    Acta Astronautica ; 10 , 9 ; 609-617


    Publication date :

    1983-01-04


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English