Title :
1.4: Design of a high-gain wideband high-power 220-GHz multiple-beam serpentine TWT
Author :
Nguyen, Khanh ; Ludeking, Lars ; Pasour, John ; Pershing, Dean ; Wright, Edward ; Abe, David K. ; Levush, Baruch
Author_Institution :
Vacuum Electron. Branch, US Naval Res. Lab., Washington, DC, USA
Abstract :
A new concept for a compact high-gain multiple-beam TWT amplifier is introduced. To illustrate the concept, we present the design of a three-beam 220-GHz serpentine TWT amplifier. MAGIC-3D particle-in-cell code simulation results predict that the device should be capable of a peak power of 73 W and saturated gain of 42 dB over an instantaneous bandwidth of 50 GHz (23%), when powered by three 100 mA, 20 kV, well-focused electron beams. This performance can be achieved in a very compact circuit length of only 1.5 cm - a significant advantage for THz electron beam devices where issues of fabrication tolerances, beam alignment, and electron interception are of critical importance.
Keywords :
electron beam focusing; electron beams; travelling wave amplifiers; travelling wave tubes; wideband amplifiers; MAGIC-3D particle-in-cell code simulation; THz electron beam device; bandwidth 50 GHz; beam alignment; compact circuit length; compact high-gain wideband high-power multiple-beam serpentine TWT amplifier; current 100 mA; electron interception; fabrication tolerance; frequency 220 GHz; gain 42 dB; power 73 W; voltage 20 kV; well-focused electron beam; Bandwidth; Broadband amplifiers; Circuits; Cutoff frequency; Electron beams; Fabrication; Gain; High power amplifiers; Waveguide components; Wideband; Multiple beam; THz; TWT; amplifier; folded waveguide; serpentine; vacuum electronics;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2010 IEEE International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-7098-3
DOI :
10.1109/IVELEC.2010.5503621
