High space harmonic perturbations in travelling wave tubes

  • Han S. Uhm
  • Joon Y. Choe
  • Chung M. Kim


Stability properties of the free streaming mode in an electron beam propagating through a cylindrical waveguide loaded with a tape helix are investigated, including influence of high space harmonic perturbations. Closed algebraic dispersion relation of the free streaming mode are obtained. Properties of the high space harmonic perturbations are numerically investigated in connection with application on a high frequency microwave amplifier. One of the most important features in this analysis is that instability of high harmonic perturbations occurs at a very large value of microwave frequency. In this regard, millimeter microwave can be easily attainable by reducing the helix radius to a subcentimeter.


Microwave Electron Beam Dispersion Relation Stability Property Free Stream 
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Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • Han S. Uhm
    • 1
  • Joon Y. Choe
    • 1
  • Chung M. Kim
    • 1
  1. 1.Naval Surface Weapons CenterSilver Spring

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