Multi-mode coupling wave theory for helically corrugated waveguide

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Helically corrugated waveguide has been used in various applications such as gyro-backward wave oscillators, gyro-traveling wave amplifier and microwave pulse compressor. A fast prediction of the dispersion characteristic of the operating eigenwave is very important when designing a helically corrugated waveguide. In this paper, multi-mode coupling wave equations were developed based on the perturbation method. This method was then used to analyze a five-fold helically corrugated waveguide used for X-band microwave compression. The calculated result from this analysis was found to be in excellent agreement with the results from numerical simulation using CST Microwave Studio and vector network analyzer measurements.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number1
Publication statusPublished - Jan 2012


  • helical corrugation
  • helical interaction region
  • helically corrugated waveguide
  • helical interaction waveguide
  • gyro-amplifier tube
  • gyro-traveling-wave tubes
  • gyro-TWA
  • gyro-devices
  • gyro-BWO


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