Title :
Design and cold test of a novel broadband output coupler for sheet beam travelling tube
Author :
Shu, G.X. ; Wang, J.X. ; Liu, G. ; Yang, L.Y. ; Luo, Y.
Author_Institution :
Sch. of Phys. Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A novel output coupler for the broadband operation of sheet beam travelling wave tubes (SB-TWTs), which consists of a L-bend waveguide, a muti-stage stepped waveguide and a cascaded Bragg resonator, is proposed, analyzed and cold tested in this paper. Simulated results have shown that maximum relative bandwidth for isolation under -15dB can reach 26%. A Q-band output coupler is cold tested and measured results have a good agreement with the simulated ones.
Keywords :
travelling wave tubes; waveguide couplers; L-bend waveguide; Q-band output coupler; broadband output coupler; cascaded Bragg resonator; muti-stage stepped waveguide; sheet beam travelling wave tubes; Bandwidth; Broadband communication; Couplers; Electron tubes; Ports (Computers); Radio frequency; Reflectivity; broadband output coupler; curved Bragg resonator; microwave measurement; sheet beam TWT;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2015 IEEE International
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7109-1
DOI :
10.1109/IVEC.2015.7223829
