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Cathode voltage adjustment to compensate helix pitch tolerance in TWTs

Research output: Contribution to journalJournal article


Journal publication date8/01/2004
JournalElectronics Letters
Number of pages3
Original languageEnglish


The correct definition of helix pitch profile in multisection helix travelling-wave tubes is fundamental to obtain the required performance. The impact of tolerances on helix pitch manufacturing is a relevant reason for significant degradation of the small-signal gain. A detailed study analysing the effectiveness of compensating the effect of helix pitch error by a cathode voltage adjustment is proposed.