AbstractThe technology of gallium arsenide field-effect transistors has advanced to the point where these devices can serve to replace traveling wave tubes in spaceborne communication transponders.This paper describes interim results of a C-band FET amplifier which is currently being developed by RCA for INTELSAT. The FETA is designed to provide a 6-W output with an efficiency greater than 25%, and a backed-off 1.5-W output level with low distortion and efficiency of 13%.The third order intermodulation ( C I ) of a FETA at saturation is typically 15 dB as compared to 10 dB for a TWTA. At 10 dB input power back-off the C I improves to 24 dB while that of a TWTA is only 16 dB.We fabricated a breadboard 5-W FETA which demonstrates that a linear operation can be achieved at an output level of 1.5 W with 10% efficiency. By contrast the efficiency of a typical 5 W TWTA in the same linear region is no greater than 3–5%.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    C-band FET power amplifier for TWTA replacement


    Beteiligte:
    Drago, Frank (Autor:in) / Hawley, James (Autor:in) / Huang, Ho-Chung (Autor:in) / Sechi, Franco N. (Autor:in)

    Erschienen in:

    Acta Astronautica ; 8 , 4 ; 389-397


    Erscheinungsdatum :

    1980-01-29


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Wideband TWTA Linearized Driver Amplifier for Ka-Band Satellites

    Katz, A. / Gray, R. / MacDonald, J. et al. | British Library Conference Proceedings | 2000


    Wideband TWTA linearized driver amplifier for Ka-band satellites

    Katz, Allen / Gray, Robert / MacDonald, John et al. | AIAA | 2000


    A low-power, high-efficiency Ka-band TWTA

    Curren, Arthur N. / Dayton, James A., Jr. / Palmer, Raymond W. et al. | NTRS | 1992



    Advanced lightweight TWTA designs

    Huebner, K.-H. | AIAA | 1998