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Improvements in performance of broadband helix traveling-wave tubes.

Ghosh, Tushar K. and Challis, Anthony J. and Jacob, Alan and Bowler, Darrin and Carter, Richard G. (2008) Improvements in performance of broadband helix traveling-wave tubes. IEEE Transactions on Electron Devices, 55 (2). pp. 668-673. ISSN 0018-9383

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    Abstract

    The effectiveness of positive phase velocity tapering to improve the performance of a broadband helix traveling-wave tube (TWT) has been investigated. A large-signal model of an existing 4.5-18 GHz two-section mini-TWT with uniform pitch has been validated against the experimental results, and used as a starting point to design and develop a number of TWTs with different taper lengths. Comparisons between the experimental results of uniform pitch TWT and positively tapered TWTs show significant improvements in output power, electronic efficiency, and second harmonic content throughout the operating frequency band for the positively tapered TWTs. Increases in electronic efficiency and output power up to 5.2% points and 50 W (1.7 dB), respectively, have been achieved.

    Item Type: Article
    Journal or Publication Title: IEEE Transactions on Electron Devices
    Additional Information: "©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." "This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder."
    Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
    Departments: Faculty of Science and Technology > Engineering
    ID Code: 26824
    Deposited By: Prof Richard G. Carter
    Deposited On: 27 Jul 2009 14:01
    Refereed?: Yes
    Published?: Published
    Last Modified: 24 Jan 2014 05:17
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/26824

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