A wide-band HE11 mode window for millimeter wave gyro-TWAs

Donaldson, C. R. and McElhinney, P. and Zhang, L. and Yin, H. and Cross, A. W. and He, W.; (2015) A wide-band HE11 mode window for millimeter wave gyro-TWAs. In: IRMMW-THz 2015. IEEE, CHN, pp. 1-2. ISBN 9781479982721 (https://doi.org/10.1109/IRMMW-THz.2015.7327456)

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Broadband windows are critical components in gyro-TWAs and pose a great challenge to manufacture. They are required to have very low reflection whilst coupling in microwave power. Presented in this paper is the design, simulation and measurement of a wide-band (90 to 100 GHz) multilayer microwave window using the HE11 mode as the input microwave mode. The simulated performance shows a better than -30 dB reflection over a 10% bandwidth of 90-100 GHz. The measured window is in very good agreement with simulations.