A millimeter-wave klystron upconverter with a higher order mode output cavity

Burt, Graeme and Zhang, Liang and Constable, David A. and Yin, Huabi and Lingwood, Chris J. and He, Wenlong and Paoloni, Claudio and Cross, Adrian W. (2017) A millimeter-wave klystron upconverter with a higher order mode output cavity. IEEE Transactions on Electron Devices, 64 (9). pp. 3857-3862. 7990587. ISSN 0018-9383 (https://doi.org/10.1109/TED.2017.2724581)

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Abstract

Manufacturing of klystrons in the millimeter-wave frequency range is challenging due to the small size of the cavities and the ratio of the maximum gap voltage to the beam energy. The small dimensions also make difficult to produce devices with the output power required by a number of applications at millimeter wave, such as communications and spectroscopy. Operating with a higher order mode can be a potential solution, as a larger transverse size structure can be used. Unfortunately, high-order mode cavities have a lower impedance than in fundamental mode. In this paper is proposed a novel solution to overcome the reduced impedance by utilizing an upconverter, where all cavities except the output cavity are designed to work in high-order mode. To demonstrate the effectiveness of the approach, two klystron upconverters were designed. One has six cavities aiming to achieve a maximum output power of ∼90 W at 105 GHz. The second klystron upconverter was a simpler three-cavity structure designed for quick prototype. Millimeter-wave measurements of the three-cavity klystron upconverter are presented.

  • Item type:Article
    ID code:62195
    Dates:
    Date
    Event
    30 September 2017
    Published
    25 July 2017
    Published Online
    27 June 2017
    Accepted
    Notes:© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:01 Nov 2017 09:46
    Last modified:11 Apr 2024 01:24
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/62195
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