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

doi:10.1109/IRMMW-THz.2016.7758520

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

Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English
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	https://doi.org/10.1109/IRMMW-THz.2016.7758520
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 Sep 2016 → 30 Sep 2016 http://terahertz.dk/irmmwthz2016/ http://www.irmmw-thz2016.org/

Publication series

Name	Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves
Publisher	IEEE
ISSN (Print)	2162-2035

Conference

Conference	41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016
Abbreviated title	IRMMW-THz 2016
Country	Denmark
City	Copenhagen
Period	25/09/16 → 30/09/16
Internet address	http://terahertz.dk/irmmwthz2016/ http://www.irmmw-thz2016.org/

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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10.1109/IRMMW-THz.2016.7758520

Garner-etal-IRMMW-THz2016-Simulation-of-rectangular-TE10-to-circular-TE11-terahertz-mode-convertersAccepted author manuscript, 294 KB

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Garner, J. R., Zhang, L., Donaldson, C. R., Cross, A. W., Phelps, A. D. R., & He, W. (2016). Simulation of rectangular TE₁₀ to circular TE₁₁ terahertz mode converters. In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 [7758520] (Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves).. https://doi.org/10.1109/IRMMW-THz.2016.7758520

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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.",

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",

author = "Garner, {J. R.} and L. Zhang and Donaldson, {C. R.} and Cross, {A. W.} and Phelps, {A. D. R.} and W. He",

note = "{\textcopyright} 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.; 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016, IRMMW-THz 2016 ; Conference date: 25-09-2016 Through 30-09-2016",

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Garner, JR, Zhang, L , Donaldson, CR , Cross, AW , Phelps, ADR & He, W 2016, Simulation of rectangular TE₁₀ to circular TE₁₁ terahertz mode converters. in 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016., 7758520, Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves, Piscataway, 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016, Copenhagen, Denmark, 25/09/16. https://doi.org/10.1109/IRMMW-THz.2016.7758520

Simulation of rectangular TE₁₀ to circular TE₁₁ terahertz mode converters. / Garner, J. R.; Zhang, L.; Donaldson, C. R.; Cross, A. W.; Phelps, A. D. R.; He, W.

41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. Piscataway, 2016. 7758520 (Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

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AU - Cross, A. W.

AU - Phelps, A. D. R.

AU - He, W.

N1 - © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

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N2 - 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.

AB - 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.

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KW - bandwidth

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Garner JR, Zhang L , Donaldson CR , Cross AW , Phelps ADR, He W. Simulation of rectangular TE₁₀ to circular TE₁₁ terahertz mode converters. In 41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016. Piscataway. 2016. 7758520. (Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves). https://doi.org/10.1109/IRMMW-THz.2016.7758520