NDLI: High-power brazed-helix telecommunications TWT's

Content Provider	IEEE Xplore Digital Library
Author	Fleury, G. Kuntzmann, J.C. Lafuma, P.
Copyright Year	1977
Description	Author affiliation: THOMSON-CSF, Paris, FRANCE (Fleury, G.)
Abstract	Described is a new class of high-power traveling-wave tubes (TWT's) for telecommunications transmitters, which employ an advanced helix technology to enable operation at higher output-power levels than would be possible with the "conventional" helix technology. The helix technology used to make these tubes includes a copper helix, which is brazed to beryllium-oxide dielectric support rods, themselves being brazed to an outer copper sleeve. The resulting structure is characterized by low thermal contact resistance, superior heat-dissipation capacity and low RF losses. Experimental results presented show the advantages of this technology as compared to the earlier one. The output-power limits of brazed-helix TWT's are also estimated. Finally, the main brazed-helix telecommunications TWT's manufactured by THOMSON-CSF are described briefly, to give an idea of the performances that can be achieved with this advanced technology.
Starting Page	116
Ending Page	119
File Size	436740
Page Count	4
File Format	PDF
DOI	10.1109/IEDM.1977.189181
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1977-12-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Thermal resistance Copper Electron tubes Contact resistance Tungsten Electric resistance Dielectrics Power generation Steel Elasticity
Content Type	Text
Resource Type	Article

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