Gain-frequency response of a helix traveling-wave tube with T-shaped dielectric support rods in a metal envelope

The slow-wave structure parameters of a traveling-wave tube with T-shaped dielectric rods in a metal envelope were optimized for flat-to-negative dispersion characteristics obtained by the sheath-helix model of analysis. The analytical results were validated against those obtained by the tape-helix...

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Bibliographic Details
Published in:Journal of electromagnetic waves and applications 2016-03, Vol.30 (5), p.566-578
Main Authors: Varshney, Amit K., Guha, Raktim, Ghosh, Sanjay K., Basu, B. N.
Format: Article
Language:English
Subjects:
helical slow-wave structures
helix dispersion
helix interaction impedance
TWT gain-frequency response
Wideband TWTs
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Summary:The slow-wave structure parameters of a traveling-wave tube with T-shaped dielectric rods in a metal envelope were optimized for flat-to-negative dispersion characteristics obtained by the sheath-helix model of analysis. The analytical results were validated against those obtained by the tape-helix model of analysis and CST Microwave Studio. Such optimized structure parameters also gave wideband gain-frequency response of the device as predicted by Pierce's small-signal theory. The electron beam voltage was also identified as an additional parameter for widening the device bandwidth.
ISSN:0920-5071
1569-3937
DOI:10.1080/09205071.2015.1132639