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  • IET-MAP.2015.0681

    Rights statement: This paper is a postprint of a paper submitted to and accepted for publication in IET Microwaves, Antenas and Propagation and is subject to Institution of Engineering and Technology Copyright 2016. The copy of record is available at IET Digital Library

    Accepted author manuscript, 1.13 MB, PDF document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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Microwave coupler for W-band micro re-entrant square cavities

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<mark>Journal publication date</mark>15/05/2016
<mark>Journal</mark>IET Microwaves, Antennas and Propagation
Issue number7
Volume10
Number of pages6
Pages (from-to)764-769
Publication StatusPublished
Early online date16/02/16
<mark>Original language</mark>English

Abstract

Klystrons are vacuum electronic devices widely used for microwave amplification up to the millimetre-wave
region. The opportunity to push the operating frequency of conventional klystrons above 30–40 GHz is limited by the 20 fabrication difficulties of the cavities that have very small dimensions. A high order mode micro re-entrant square cavity was purposely devised to be compatible with the available micro fabrication processes and represents a viable solution for the design of millimetre-wave klystrons. In this study, a coupler to correctly excite the higher order mode of the square re-entrant cavities for W-band operation is proposed. The design of the proposed novel coupler structure has been validated by realisation and measurement of a scaled X-band prototype. The post-realisation tuning methods
25 adopted to improve the matching of the high order mode are also presented.

Bibliographic note

This paper is a postprint of a paper submitted to and accepted for publication in IET Microwaves, Antenas and Propagation and is subject to Institution of Engineering and Technology Copyright 2016. The copy of record is available at IET Digital Library