Title :
Ka-band folded waveguide traveling-wave tube experiment
Author :
Han, Seong-Tae ; Kim, Jung-Il ; Jia, Baofu ; Park, Gun-Sik ; Chang, Suk-sang
Author_Institution :
Sch. of Phys., Seoul Nat. Univ., South Korea
Abstract :
The method to synthesize the main parameters of folded waveguide traveling tube (FWTWT) is studied and used for designing a Ka-band FWTWT. To estimate the synthesis, cold. and hot characteristics such as phase velocity, interaction impedance and growth rate, are calculated and compared with those obtained by the simulation using HFSS and MAGIC. A Ka-band folded waveguide TWT using a 12 kV, 120 mA electron beam is designed from the synthesis and fabricated. Theoretical and experimental details are presented. In addition, a 2Π-mode stop band due to the fabrication error is studied and LIGA fabrication as an alternative method to overcome this phenomenon is considered.
Keywords :
LIGA; dispersion (wave); millimetre wave tubes; simulation; travelling wave tubes; 12 kV; 120 mA; 2Π-mode stop band; HFSS; Ka-band TWT; LIGA fabrication; MAGIC; electron beam; fabrication error; folded waveguide TWT; growth rate; interaction impedance; phase velocity; simulation; synthesis; Circuits; Cutoff frequency; Electron beams; Electron tubes; Fabrication; Impedance; Optical coupling; Phase estimation; Robustness; Waveguide theory;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002. 2002 3rd International Conference on
Print_ISBN :
0-7803-7486-X
DOI :
10.1109/ICMMT.2002.1187667
