• DocumentCode
    989837
  • Title

    Effect of mode launcher geometry on the performance of a mode-selective input coupler for a gyrotron amplifier

  • Author

    Tate, J.P. ; Guo, Hongyu ; Naiman ; Chen, Luo-nan ; Granatstein, V.L.

  • Author_Institution
    Lab. for Plasma Res., Maryland Univ., College Park, MD, USA
  • Volume
    29
  • Issue
    25
  • fYear
    1993
  • Firstpage
    2203
  • Lastpage
    2205
  • Abstract
    In the process of developing a wideband input coupler for a gyrotron amplifier, the authors have measured the scalar reflection coefficient for three mode launching geometries, each mounted coaxially in an overmoded circular waveguide. A helical structure is fed directly from a 50 Omega TEM coaxial line. The impedance match is significantly affected by changes in the helix and helix support structure. A bandwidth from 16.5 to 18GHz is demonstrated from a TE02 mode input coupler for one of the geometries under study.
  • Keywords
    circular waveguides; gyrotrons; impedance matching; waveguide couplers; 16.5 to 18 GHz; SHF; TE 02 mode; TEM coaxial line; gyrotron amplifier; helical structure; impedance match; mode launcher geometry; mode-selective input coupler; overmoded circular waveguide; scalar reflection coefficient; wideband input coupler;
  • fLanguage
    English
  • Journal_Title
    Electronics Letters
  • Publisher
    iet
  • ISSN
    0013-5194
  • Type

    jour

  • DOI
    10.1049/el:19931480
  • Filename
    250361
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=989837