Input coupling systems for millimetre-wave gyrotron travelling wave amplifiers

Liang Zhang, Craig R. Donaldson, Jason Garner, Adrian W. Cross, Wenlong He

Research output: Contribution to journalArticle

3 Citations (Scopus)
17 Downloads (Pure)

Abstract

Input couplers for millimetre-wave gyrotron travelling wave amplifiers are presented in this study. A W-band input coupling system composed of a pillbox window, a smoothly curved waveguide bend, a T-junction and a broadband reflector was numerically optimised, constructed and measured. An average transmission coefficient of −2.0 dB over a designed operating frequency range was measured. Additionally, a higher-frequency input coupler for operation at a central frequency of 372 GHz was also designed based on a multiple-hole coupling configuration. The simulated transmission coefficient was −0.5 dB if the ohmic loss is not considered.
Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalIET Microwaves, Antennas & Propagation
Early online date9 Apr 2018
DOIs
Publication statusE-pub ahead of print - 9 Apr 2018

Keywords

  • input coupler
  • gyro-amplifier
  • millimeter wave sources

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