Design of helix slow-wave structures for high efficiency TWTs

TWTs for space applications commonly have a helix pitch profile which incorporates a section with increased phase velocity followed by a negative phase velocity taper. A simple method is described for the initial design of a helix slow-wave structure of this kind to achieve high overall efficiency....

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Veröffentlicht in:IEEE transactions on electron devices 2000-12, Vol.47 (12), p.2438-2443
Hauptverfasser: Srivastava, V., Carter, R.G., Ravinder, B., Sinha, A.K., Joshi, S.N.
Format: Artikel
Sprache:eng
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Zusammenfassung:TWTs for space applications commonly have a helix pitch profile which incorporates a section with increased phase velocity followed by a negative phase velocity taper. A simple method is described for the initial design of a helix slow-wave structure of this kind to achieve high overall efficiency. It is shown that the use of a section with increased phase velocity increases the beam efficiency of a TWT while reducing the generation of second harmonic power. The technique is illustrated by its application to a 70 W Ku-band TWT and the performance is shown to be comparable with that of an existing TWT.
ISSN:0018-9383
1557-9646
DOI:10.1109/16.887034