Input coupling systems for millimetre-wave gyrotron travelling wave amplifiers

Zhang, Liang and Donaldson, Craig R. and Garner, Jason and Cross, Adrian W. and He, Wenlong (2018) Input coupling systems for millimetre-wave gyrotron travelling wave amplifiers. IET Microwaves, Antennas & Propagation. pp. 1-4. ISSN 1751-8725

[thumbnail of Zhang-etal-IET-2018-Input-coupling-systems-for-millimetre-wave-gyrotron]
Preview
Text (Zhang-etal-IET-2018-Input-coupling-systems-for-millimetre-wave-gyrotron)
Zhang_etal_IET_2018_Input_coupling_systems_for_millimetre_wave_gyrotron.pdf
Accepted Author Manuscript

Download (700kB)| Preview

    Abstract

    Input couplers for millimetre-wave gyrotron travelling wave amplifiers are presented in this study. A W-band input coupling system composed of a pillbox window, a smoothly curved waveguide bend, a T-junction and a broadband reflector was numerically optimised, constructed and measured. An average transmission coefficient of −2.0 dB over a designed operating frequency range was measured. Additionally, a higher-frequency input coupler for operation at a central frequency of 372 GHz was also designed based on a multiple-hole coupling configuration. The simulated transmission coefficient was −0.5 dB if the ohmic loss is not considered.

    ORCID iDs

    Zhang, Liang ORCID logoORCID: https://orcid.org/0000-0002-6317-0395, Donaldson, Craig R. ORCID logoORCID: https://orcid.org/0000-0001-6627-2461, Garner, Jason ORCID logoORCID: https://orcid.org/0000-0002-9985-0739, Cross, Adrian W. ORCID logoORCID: https://orcid.org/0000-0001-7672-1283 and He, Wenlong ORCID logoORCID: https://orcid.org/0000-0001-7018-0527;