C-BAND TRANSPONDER in PSLVC-17/GSAT-12 satellite?..

hi guys.
A very happy news was that ,on 15th july 2011, INDIA SUCCESSFULLY LAUNCHED PSLV-C17/GSAT-12 satellite with 12 extended C-BAND TRANSPONDER from sriharikota, Bangalore.
i'm very happy about that!๐Ÿ˜€. Ok , in that anyone explain me "What is meant by TRANSPONDER ?" & and why are they specifically tell as "C-BAND"-Transponder?..

I'm very eager to know about it...
Your answers are always welcome..

With regards,


  • Kaustubh Katdare
    Kaustubh Katdare
    Thread moved to electrical & electronics engineering section for better responses ๐Ÿ˜€

    Transponder stands for Transmitter & Responder. C-Band transponders are specifically used in RADAR communications. There's a wikipedia link An/Fps 16 but I guess a communications engineer would be able to explain it to us. ๐Ÿ˜€
    OK , in that anyone explain me "What is meant by TRANSPONDER ?" & and why are they specifically tell as "C-BAND"-Transponder?..
    The transponder in sat. are used to receives and transmit freq. from earth to space.....these freq. are called Up link and Down link freq. it is used in every band ku,C,etc....
    also have look in this link...#-Link-Snipped-#

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The SAE update of August 2011 can be read at SAE Update - August 2011 - (1)