Title :
Accurate cold-test model of helical TWT slow-wave circuits
Author :
Kory, Carol L. ; Dayton, James A., Jr.
Author_Institution :
Analex Corp., NASA Lewis Res. Center, Cleveland, OH, USA
fDate :
4/1/1998 12:00:00 AM
Abstract :
Recently, a method has been established to accurately calculate cold-test data for helical slow-wave structures using the three-dimensional (3-D) electromagnetic computer code, MAFIA. Cold-test parameters have been calculated for several helical traveling-wave tube (TWT) slow-wave circuits possessing various support rod configurations, and results are presented here showing excellent agreement with experiment. The helical models include tape thickness, dielectric support shapes and material properties consistent with the actual circuits. The cold-test data from this helical model can be used as input into large-signal helical TWT interaction codes making it possible, for the first time, to design a complete TWT via computer simulation
Keywords :
digital simulation; dispersion relations; electrical engineering computing; slow wave structures; 3D electromagnetic computer code; MAFIA; cold-test data; cold-test model; dielectric support shapes; helical TWT slow-wave circuits; large-signal helical TWT interaction codes; material properties; support rod configurations; tape thickness; traveling-wave tube; Attenuation; Circuit simulation; Dielectric materials; Dielectric measurements; Dispersion; Frequency; Geometry; Impedance; NASA; Solid modeling;
Journal_Title :
Electron Devices, IEEE Transactions on
