Title :
THz radiation using high power, microfabricated, wideband TWTs
Author :
Kory, C.L. ; Booske, J.H. ; Lee, W.-J. ; Gallagher, S. ; van der Weide, D.W. ; Limbach, S. ; Bhattacharjee, S.
Author_Institution :
Analex Corp., NASA Glenn Res. Center, Cleveland, OH, USA
Abstract :
Microfabricated, miniature, folded waveguide traveling wave tube (FWG-TWT) devices are potential compact sources of wideband (/spl sim/20% instantaneous bandwidth), high power (0.01-1 W) THz radiation. We present theoretical analyses and numerical simulations indicating that a 560 GHz, 56 mW, 1% (intrinsic) efficiency oscillator is realistically achievable, and amplifiers 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, and a 400 GHz proof-of-concept amplifier.
Keywords :
feedback amplifiers; feedback oscillators; submillimetre wave amplifiers; submillimetre wave oscillators; travelling wave tubes; 0.01 to 1 W; 1 percent; 10 to 30 dB; 400 GHz; 50 GHz; 56 mW; 560 GHz; amplifier; folded waveguide traveling wave tube; microfabrication; numerical simulation; oscillator; recirculated power feedback; vacuum electron device; wideband high-power terahertz radiation source; Bandwidth; Circuits; Electron devices; Frequency; Klystrons; Millimeter wave technology; Oscillators; Power amplifiers; Power engineering and energy; Wideband;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1011892
