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The small signal gain of the square helix TWT has been calculated based on the improved tape model. It is clearly shown that the square helix TWT possesses higher peak gain than that of the equivalent round helix TWT, which indicates higher output power under the identical device length.
In this paper, a ridge-loaded folded-waveguide slow-wave structure (SWS) for millimeter-wave traveling-wave tube (TWT) is presented. The theory of high-frequency characteristics, which includes: 1) the dispersion properties; and 2) the beam-wave interaction impedance of this structure, is analyzed. The theoretical results agree well with those obtained by the 3-D electromagnetic simulation software...
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