Optimization and measurement of a smoothly profiled horn for a W-band gyro-TWA

Liang Zhang, Wenlong He, Craig R. Donaldson, Graham M. Smith, Duncan A. Robertson, Robert I. Hunter, Adrian W. Cross

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)
264 Downloads (Pure)


In this paper, a smoothly profiled horn was designed and manufactured to replace a corrugated output horn for a W-band gyro-TWA with improved ultra-high vacuum compatibility. It was optimized for high vacuum integrity, low reflection, high fundamental Gaussian mode content, low side lobe levels and high directivity over the frequency bandwidth of 90 - 100 GHz. Over this operating frequency band the reflectivity was better than -37 dB and the coupling to a fundamental Gaussian mode was above 97%. The far field pattern showed a directivity of approximately 27 dB in the measurement with side lobes lower than -30 dB.
Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalIEEE Transactions on Electron Devices
Early online date5 May 2017
Publication statusE-pub ahead of print - 5 May 2017


  • horn
  • smoothly profiled horn
  • gyro-TWA
  • Gaussian mode


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