Selectivity Properties of Cylindrical Waveguides with Longitudinal Wall Corrugations for Second-Harmonic Gyrotrons

Spatial harmonic method is applied to investigate selectivity properties of longitudinally corrugated waveguides for potential application in second-harmonic gyrotrons. The effect of corrugations on frequencies, ohmic losses, and mode conversion of guiding TE modes is studied in details. Numerical r...

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Bibliographic Details
Published in:Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2019-10, Vol.40 (10), p.1021-1034
Main Authors: Tkachova, Tetiana I., Shcherbinin, Vitalii I., Tkachenko, Viktor I.
Format: Article
Language:English
Subjects:
Classical Electrodynamics
Corrugated waveguides
Cyclotron resonance devices
Electrical Engineering
Electronics and Microelectronics
Engineering
Instrumentation
Longitude
Properties (attributes)
Selectivity
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Summary:Spatial harmonic method is applied to investigate selectivity properties of longitudinally corrugated waveguides for potential application in second-harmonic gyrotrons. The effect of corrugations on frequencies, ohmic losses, and mode conversion of guiding TE modes is studied in details. Numerical results are presented for operating second-harmonic and competing first-harmonic modes of a 0.4-THz gyrotron with corrugated RF structure. It is shown that longitudinal wall corrugations of proper dimensions can ensure increase in ohmic losses and decrease in beam-wave coupling strength for the first-harmonic modes, while their effect on the operating mode is only slight. This demonstrates improved selectivity properties of corrugated waveguides for second-harmonic gyrotrons.
ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-019-00623-y