Filter Helix Implementation in Traveling Wave Tube Tapers

Conference: GeMiC 2014 - German Microwave Conference
03/10/2014 - 03/12/2014 at Aachen, Germany

Proceedings: ITG-Fb. 246: GeMiC 2014

Pages: 2Language: englishTyp: PDF

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Gehrmann, Elke; Gellersen, Frauke; Jacob, Arne F. (Institut fuer Hochfrequenztechnik, TU Hamburg-Harburg, 21073 Hamburg, Germany)

A filter helix consisting of periodic pitch discontinuities can be implemented in the transmission line of a traveling wave tube (TWT) to act as a stopband filter for the second harmonic. This contribution investigates the possibility of integrating such filters in tube regions with tapered helix pitch. Simulation of an L-band TWT predicts increased output power for optimized filter design.