Simulation of rectangular TE10 to circular TE11 terahertz mode converters

J. R. Garner, L. Zhang, C. R. Donaldson, A. W. Cross, A. D. R. Phelps, W. He

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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Abstract

Two designs of fundamental mode rectangular to circular waveguide TE10 to TE11 mode converter are presented. The waveguide transitions are optimized for operation as an input coupler on a 372 GHz gyro-TWA for Dynamic Nuclear Polarization (DNP) enhancement of NMR imaging. A T-junction input coupler and a multiple hole directional coupler were optimized for operation between 360-384 GHz. The T-junction coupler and the multiple hole coupler exhibited bandwidths of 10% and 35% respectively with a high coupling factor of > -1 dB.

Original languageEnglish
Title of host publication41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Place of PublicationPiscataway
Number of pages2
ISBN (Electronic)9781467384858
DOIs
Publication statusPublished - 1 Dec 2016
Event41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 - Bella Center, Copenhagen, Denmark
Duration: 25 Sept 201630 Sept 2016
http://terahertz.dk/irmmwthz2016/
http://www.irmmw-thz2016.org/

Publication series

NameProceedings International Conference on Infrared, Millimeter, and Terahertz Waves
PublisherIEEE
ISSN (Print)2162-2035

Conference

Conference41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Abbreviated titleIRMMW-THz 2016
Country/TerritoryDenmark
CityCopenhagen
Period25/09/1630/09/16
Internet address

Keywords

  • couplers
  • couplings
  • bandwidth
  • rectangular waveguides
  • waveguide transitions
  • resonant frequency
  • multiple hole coupler
  • multiple hole directional coupler
  • T-junction input coupler
  • NMR imaging
  • dynamic nuclear polarization
  • gyro-TWA
  • gyrotron-travelling wave amplifier

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