Higher order mode generation in millimeter wave regime by directly launched fundamental mode

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Microwave and Optical Technology Letters, ISSN: 0895-2477, Vol: 56, Issue: 7, Page: 1648-1651

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Choe, Mun Seok, Choi, EunMi
Wiley-Blackwell, WILEY-BLACKWELL
Physics and Astronomy, Materials Science, Engineering, F-band, Frequency ranges, Fundamental modes, Gyrotron amplifiers, Higher-order modes, mode generation, Mode generator, Mode suppression
article description
We report on a novel method to generate higher order modes in the frequency range of millimeter and submillimeter wave regime. The method uses magnetic coupling scheme between waveguide fundamental mode and a cavity mode. A TE mode at W-band was considered for design using the proposed scheme. The suggested method simplifies a mode generator design allowing direct feeding via a standard fundamental waveguide and also provides a compact mode generator to design extremely higher order mode in a cavity. In addition, it opens a new and novel way to develop high power high gain gyrotron amplifiers at millimeter and submillimeter wave regime. Copyright © 2014 Wiley Periodicals, Inc.

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