Title :
Influence of Attenuator on the Performance of the Helix TWTs
Author :
Duan, Zhaoyun ; Gong, Yubin ; Wang, Wenxiang ; Basu, B.N. ; Wei, Yanyu
Author_Institution :
National Key Lab. of High Power Vacuum Electron., Univ. of Electron. Sci. & Technol. of China
Abstract :
On the basis of the 1D Christine, under the condition of attenuator considered, that is, its RF (radio frequency) characteristics including attenuation constant, phase propagation constant and interaction impedance taken into account, in the meantime, two different attenuation models set up, the nonlinear properties of beam-wave interaction in the helix TWTs (traveling wave tubes) were analyzed, and the simulation results were compared with both conventional theory and experimental measurements under single signal excitation. The compared results clearly show that it is necessary to consider completely the attenuator´s RF characteristics to accurately evaluate the helix TWT performances, especially in the small signal gain and AM/PM conversion
Keywords :
attenuators; travelling wave tubes; attenuation constant; attenuation models; beam-wave interaction; helix tape model; helix travelling wave tubes; interaction impedance; phase propagation constant; radio frequency characteristics; signal excitation; Analytical models; Attenuation measurement; Attenuators; Frequency measurement; Impedance measurement; Phase measurement; Propagation constant; RF signals; Radio frequency; Signal analysis; Attenuator/sever; Large-signal one-dimensional model; helix tape model; helix traveling wave tubes;
Conference_Titel :
Vacuum Electronics Conference, 2006 held Jointly with 2006 IEEE International Vacuum Electron Sources., IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
1-4244-0108-9
DOI :
10.1109/IVELEC.2006.1666233
