Coupling structure for a high Q corrugated cavity as a microwave undulator

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Microwave undulators can achieve smaller wiggler periods when compared with permanent magnet undulators. This work follows on the design of a microwave undulator composed of a corrugated waveguide operating at 36 GHz. Compatible end caps and coupling structures for the waveguide to form a complete cavity were studied and are presented in this paper. Their design is scalable for different operating frequencies and periods of the corrugated waveguide. A set of empirical equations, that allows the geometry to be determined analytically, were found from the post-processing of the FDTD simulation.
Original languageEnglish
Pages (from-to)4392-4397
Number of pages6
JournalIEEE Transactions on Electron Devices
Issue number10
Early online date20 Aug 2019
Publication statusPublished - 31 Oct 2019


  • microwave undulator
  • free electron laser
  • corrugated waveguide
  • coupler

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