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A high directivity broadband corrugated horn for W-band gyro-devices

McElhinney, Paul and Donaldson, Craig R. and Zhang, Liang and He, Wenlong (2013) A high directivity broadband corrugated horn for W-band gyro-devices. IEEE Transactions on Antennas and Propagation, 61 (3). pp. 1453-1456. ISSN 0018-926X

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A quasi-optical mode converter in the form of a corrugated horn has been designed through numerical simulations, manufactured and experimentally measured for application in W-band gyro-devices. This horn converts a cylindrica TE11 mode into a free space TEM00 mode in a frequency band of 84-104 GHz with a reflection better than -30 dB, a Gaussian coupling efficiency of similar to 98% and directivity of 26.6 dB at 95 GHz. The small beam waist makes such a horn ideal for use with a depressed collector system. The measured results are in excellent agreement with the numerical simulations.