Spatial-Harmonic Magnetrons with Cold Secondary-Emission Cathode: State-of-the-Art (Review)

Spatial-harmonic magnetrons with cold secondary-emission cathode are efficient high-power sources throughout the millimeter wavelength band. In this paper, resent advances in design, modeling, and fabrication of such magnetrons are described. Low-voltage magnetrons, sub-THz tubes, and magnetrons wit...

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Bibliographic Details
Published in:Radioelectronics and communications systems 2018, Vol.61 (7), p.283-291
Main Authors: Vavriv, D. M., Naumenko, V. D., Markov, V. O.
Format: Article
Language:English
Subjects:
Cathodes
Communications Engineering
Emission
Engineering
Magnetrons
Metamaterials
Networks
Power sources
State-of-the-art reviews
Tubes
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Description
Summary:Spatial-harmonic magnetrons with cold secondary-emission cathode are efficient high-power sources throughout the millimeter wavelength band. In this paper, resent advances in design, modeling, and fabrication of such magnetrons are described. Low-voltage magnetrons, sub-THz tubes, and magnetrons with metamaterial anode structure are described to illustrate these advances. The issue of the lifetime of the magnetrons with a cold secondary-emission cathode is also addressed. The main problems related with the usage of an auxiliary cathode in such tubes are considered and alternative solutions are discussed. Potentials for further improving the performance of spatial-harmonic magnetrons are analyzed as well.
ISSN:0735-2727
1934-8061
DOI:10.3103/S0735272718070014