Title :
Harmonic reduction for broadband helix TWTs with negative dispersion
Author :
Hu, YuLu ; Wang, YanMei ; Yang, ZhongHai ; Li, Jianqing ; Li, Bin
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on Vacuum Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
An analysis of harmonic reduction with negative dispersion for broadband helix Traveling-Wave tubes (TWTs) is put forward. The synchronization of the harmonic content is reduced by the decrease of the phase velocity of fundamental wave demonstrated by the field relative phase. A 6~18GHz TWT is designed with a negative dispersion to improve the output power at low frequency by harmonic reduction and with reduced phase velocity and then a positively taper pitch profile to improve the output power at high frequency.
Keywords :
microwave tubes; travelling wave tubes; broadband helix TWT; broadband helix traveling-wave tube; frequency 6 GHz to 18 GHz; fundamental wave phase velocity; harmonic content synchronization; harmonic reduction analysis; negative dispersion; positively taper pitch profile; Broadband communication; Dispersion; Electron tubes; Harmonic analysis; Power generation; Power system harmonics; Synchronization; Harmonic reduction; Helix traveling-wave tube; Negative dispersion; PVT (phase-velocity tapering);
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2012 IEEE Thirteenth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0188-6
Electronic_ISBN :
978-1-4673-0187-9
DOI :
10.1109/IVEC.2012.6262143
