Title :
Multi-kW sheet beam amplifiers at Ka and W bands
Author :
Pasour, John ; Abe, D. ; Nguyen, Khanh ; Wright, Edward ; Pershing, Dean ; Balkcum, Adam ; Larsen, Per ; Wood, Frank ; Myers, Robert ; Levush, Baruch
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
Abstract :
NRL´s unique sheet-beam electron gun, which produces a 3.5-4-A, 0.3 × 4 mm electron beam at ~20 kV, has been successfully used to power multi-kW amplifiers at both Ka and W bands. The 94-GHz narrow-band EIK uses a 3-cavity circuit to produce a peak output power of over 7.5 kW, with saturated gain of ~35 dB. The Ka-band amplifier uses a double staggered ladder coupled-cavity circuit to achieve a peak output power >10 kW at 34 GHz, with a 3-dB bandwidth of 5 GHz and saturated gain of ~15 dB. The performance of both amplifiers is in very good agreement with models and simulations.
Keywords :
coupled circuits; electron guns; ladder networks; microwave amplifiers; millimetre wave amplifiers; 3-cavity circuit; Ka band; NRL; W band; bandwidth 5 GHz; current 3.5 A to 4 A; double staggered ladder coupled-cavity circuit; frequency 34 GHz; frequency 94 GHz; gain 3 dB; multikW sheet beam amplifier; narrow-band EIK; sheet-beam electron gun; Bandwidth; Cavity resonators; Electron beams; Gain; Power amplifiers; Power generation; Radio frequency; EIK; Neptune; Sheet beam; TWT; amplifier; coupled-cavity; millimeter wave; vacuum electronic;
Conference_Titel :
Vacuum Electronics Conference, IEEE International
Conference_Location :
Monterey, CA
DOI :
10.1109/IVEC.2014.6857469
