A broadband corrugated horn for a W-band gyro-TWA

McElhinney, Paul and Donaldson, Craig R. and He, Wenlong and Zhang, Liang and Ronald, Kevin and Phelps, Alan D. R. and Cross, Adrian W.; (2012) A broadband corrugated horn for a W-band gyro-TWA. In: IVEC 2012. IEEE, Piscataway, NJ.. ISBN 9781467301886

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    A quasi-optical mode converter in the form of a corrugated horn has been constructed for a W-band gyrotron traveling wave amplifier (gyro-TWA). The prototype was designed and optimized through analytical and numerical simulations. The horn converts a cylindrical TE 11 mode into a free-space TEM 00 mode in a frequency band of 90 GHz to 100 GHz. The optimized simulation predicts a return loss better than -35 dB and a Gaussian coupling efficiency of 97.8% and the measured prototype demonstrates a close agreement with these figures.