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 language | English |
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Title of host publication | 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 |
Place of Publication | Piscataway |
Number of pages | 2 |
ISBN (Electronic) | 9781467384858 |
DOIs | |
Publication status | Published - 1 Dec 2016 |
Event | 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 - Bella Center, Copenhagen, Denmark Duration: 25 Sept 2016 → 30 Sept 2016 http://terahertz.dk/irmmwthz2016/ http://www.irmmw-thz2016.org/ |
Publication series
Name | Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves |
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Publisher | IEEE |
ISSN (Print) | 2162-2035 |
Conference
Conference | 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 |
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Abbreviated title | IRMMW-THz 2016 |
Country/Territory | Denmark |
City | Copenhagen |
Period | 25/09/16 → 30/09/16 |
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