DocumentCode :
1066146
Title :
Analysis of a broadband Q band folded waveguide traveling-wave tube
Author :
Na, Young Ho ; Chung, Sang Wook ; Choi, Jin Joo
Author_Institution :
Sch. of Electron. Eng., Kwangwoon Univ., Seoul, South Korea
Volume :
30
Issue :
3
fYear :
2002
fDate :
6/1/2002 12:00:00 AM
Firstpage :
1017
Lastpage :
1023
Abstract :
A highly reproducible, low-cost folded waveguide traveling-wave-tube amplifier is designed using the Pierce theory and a three-dimensional (3-D) particle-in-cell (PIC) code. The amplifier is designed to operate at 40-48 GHz with peak output radiation power of 200 W. Initial circuit parameters are obtained from the Pierce theory and circuit dispersion relations. A nonlinear large-signal performance of the amplifier is predicted from 3-D PIC simulations. Simulations show that the amplifier produces a saturated radiation power of 200 W at 44 GHz, corresponding to 5.6% electronic efficiency where the beam voltage and current are 21 kV and 0.17 A, respectively. A saturated 3-dB bandwidth is found to be 16% (40.5-47.5 GHz).
Keywords :
digital simulation; millimetre wave power amplifiers; millimetre wave tubes; travelling wave amplifiers; travelling wave tubes; wideband amplifiers; 0.17 A; 200 W; 21 kV; 3-D PIC simulations; 40 to 48 GHz; 5.6 percent; MAGIC 3D particle-in-cell code; Pierce theory; beam current; beam voltage; broadband Q band folded waveguide traveling-wave tube; circuit dispersion relations; electronic efficiency; folded waveguide traveling-wave-tube amplifier; initial circuit parameters; linear large-signal performance; peak output radiation power; saturated bandwidth; saturated radiation power; three-dimensional particle-in-cell code; Bandwidth; Circuit simulation; Coupling circuits; Electromagnetic waveguides; Frequency; Millimeter wave circuits; Millimeter wave radar; Power amplifiers; Waveguide components; Waveguide theory;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2002.801638
Filename :
1158337
Link To Document :
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