Title :
Comprehensive simulations of compact THz radiation sources using microfabricated, folded waveguide TWTs
Author :
Bhattacharjee, S. ; Kory, C.L. ; Lee, W.-J. ; Gallagher, S. ; van der Weide, D.W. ; Booske, John H. ; Limbach, S.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
Abstract :
Microfabricated folded waveguide traveling wave tubes (FWG-TWT) are potential compact sources of wideband (∼20% instantaneous bandwidth), high power (0.01 - 1 W) THz radiation. We present numerical simulations indicating that a 560 GHz, 56 mW, 1% (intrinsic) efficiency oscillator is realistically achievable, and a 400 GHz amplifier with gains between 10 and 30 dB are feasible with circuit lengths of a few centimeters. We also discuss a scale-model experiment at 50 GHz to investigate an oscillator concept using a recirculated power feedback approach.
Keywords :
submillimetre wave amplifiers; submillimetre wave generation; submillimetre wave oscillators; travelling wave tubes; waveguide components; 1 percent; 10 to 30 dB; 400 GHz; 50 GHz; 56 mW; 560 GHz; amplifier; folded waveguide traveling wave tube; microfabrication; numerical simulation; oscillator; power feedback; terahertz radiation source; Bandwidth; Circuit simulation; Computational modeling; Drives; Electromagnetic waveguides; Electron beams; Feedback; Frequency; Oscillators; Power engineering and energy;
Conference_Titel :
Vacuum Electronics Conference, 2002. IVEC 2002. Third IEEE International
Print_ISBN :
0-7803-7256-5
DOI :
10.1109/IVELEC.2002.999242
