Referenced Items are not available for this document.
A theory of the attenuator-coated helical slow-wave structure of a traveling-wave tube has been developed by considering the helix turns to be effectively shorted by a resistive coating. Power propagating down the structure is interpreted for the interaction impedance in the presence of the attenuator-coating losses. The dependence of the attenuation and phase propagation constants as well as the interaction impedance on the surface resistivity of the coating, the operating frequency, the thickness/proximity of the envelope, the permittivity of the dielectric, and the pitch of the helix have been studied for two situations in which the attenuator coating is applied: (1) inside a dielectric tube that the helix fits into, the whole enclosed in a metal envelope: and (2) over a dielectric tube enclosure for the helix
Published in:
Electron Devices, IEEE Transactions on
(Volume:35
,
Issue:
10
)
Date of Publication: Oct 1988
- Page(s):
- 1750 - 1757
- ISSN :
- 0018-9383
- INSPEC Accession Number:
- 3270804
- Digital Object Identifier :
- 10.1109/16.7381
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Oct 1988
- Sponsored by :
- IEEE Electron Devices Society
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