DocumentCode :
3214594
Title :
High power bend mode converter in overmoded waveguide for gyroklystron
Author :
Gu Ling ; Niu Xin-Jian ; Yu Xin-Hua
Author_Institution :
Southwest Univ. for Nat., Chengdu, China
fYear :
2010
fDate :
14-16 Oct. 2010
Firstpage :
394
Lastpage :
395
Abstract :
The output mode of gyroklystron TE01 and TE02 are very inconvenient for direct use, so it must be taken a mode conversion, especially high power mode conversion. And its mode converter adopt mostly the following sequence: 1. TEon (gyrotron) -TE01-TE11-HE11 (antenna) 2. TEon (gyrotron) -TE01-TM11-HE11 (antenna) The first sequence has been employed here, adopting perturbation of axis curved, and arriving at an efficient circular waveguide converter with conversion efficiency reaching 98% and bandwidth exceeding 5%, while its overlength(881.6mm) confines its practice to a limited field with inconvenient machining. Thus the second sequence is chosen to for better usage, with TM11 as the intermediate polarized mode, HE11 the latter one, to radiate outside, during the process of which TE01-TM11 conversion is the most important. The same phase velocity of TE01 and TM11 made a proper selection of a part of the single-curvature circular waveguide fit the realization of their conversion well.
Keywords :
circular waveguides; convertors; gyrotrons; klystrons; antenna; circular waveguide converter; conversion efficiency; gyroklystron; high power bend mode converter; high power mode conversion; overmoded waveguide;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vacuum Electron Sources Conference and Nanocarbon (IVESC), 2010 8th International
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-6645-0
Type :
conf
DOI :
10.1109/IVESC.2010.5644122
Filename :
5644122
Link To Document :
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