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Simulation of rectangular TE10 to circular TE11 terahertz mode converters

Garner, J. R. and Zhang, L. and Donaldson, C. R. and Cross, A. W. and Phelps, A. D. R. and 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. Proceedings International Conference on Infrared, Millimeter, and Terahertz Waves . IEEE Computer Society Press, Piscataway. ISBN 9781467384858

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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.