Gehrmann, ElkeElkeGehrmannGellersen, Frauke K. H.Frauke K. H.GellersenJacob, Arne F.Arne F.Jacob2021-01-062021-01-062014-038th German Microwave Conference (GeMiC 2014)http://hdl.handle.net/11420/8307A 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.enConference PaperOther