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Measurement of a high Gaussian-content corrugated horn for a W-band gyro-TWA

Zhang, Liang and McElhinney, Paul and Donaldson, Craig R. and He, Wenlong and Phelps, Alan D. R. and Cross, Adrian W. (2016) Measurement of a high Gaussian-content corrugated horn for a W-band gyro-TWA. 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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    A corrugated horn was design to achieve high Gaussian content horn and low reflection over an operating frequency range of 90-100 GHz was designed and verified by measurement with a vector network analyzer (VNA). The corrugated horn will be used in a W-band gyro-TWA experiment to convert TE11 mode in circular waveguide into a Gaussian-like HE11 mode. The measurement shows a lower than -30 dB reflection over the desired frequency range, and the Gaussian percentage is about 99.4%, which is close to the simulation results.