NDLI: Correction of the dispersion characteristic of a helix slow-wave structure in traveling-wave tubes

Content Provider	Springer Nature Link
Author	Pchelnikov, Yu. N.
Copyright Year	2011
Abstract	On the basis of a physical notions of the specific features of the slow-wave field distribution in the helix structure of a traveling-wave tube (TWT), various methods for controlling the amount of wave slowing and the slope of the dispersion characteristic are analyzed. The effect of the dielectric supports and correcting elements placed outside the helix is considered. In addition to the known methods for correcting dispersion through the use of a dielectric shield and longitudinally conducting elements, which weaken the interaction with the electron flow, new methods that provide both an efficient interaction with the electrons and the possibility of operation without backward-wave self-excitation at voltages higher than the voltages used with conventional helices are proposed and analyzed. With an analysis based on the equivalent-line method, it is shown that the slope of the helix dispersion characteristic can be decreased by the appropriate use of ring-shaped supports. Design solutions using the new methods of correction are considered. The history of development of ultrabroadband TWTs, including the work done in the Soviet Union on tubes with centrifugal electrostatic focusing, whose actual amplification band can be as wide as three octaves, is partially presented.
Starting Page	404
Ending Page	418
Page Count	15
File Format	PDF
ISSN	10642269
Journal	Journal of Communications Technology and Electronics
Volume Number	56
Issue Number	4
e-ISSN	15556557
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2011-05-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Communications Engineering, Networks
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering Radiation

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