Study of a high power sine waveguide traveling wave tube amplifier centered at 8 GHz

Performance of a 20-stage X-band sine waveguide amplifier, driven by a 40 A, 100 kV, cylindrical electron beam, is studied using numerical simulation and interpreted using Pierce's classical traveling wave tube theory. For an input signal power level of 1.8 kW, particle-in-cell simulations pred...

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Bibliographic Details
Published in:Physics of plasmas 2016-10, Vol.23 (10)
Main Authors: Hoff, Brad W., Simon, David S., French, David M., Lau, Y. Y., Wong, Patrick
Format: Article
Language:English
Subjects:
Computer simulation
Electron beams
Particle in cell technique
Plasma physics
Simulation
Space charge
Traveling wave tubes
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Summary:Performance of a 20-stage X-band sine waveguide amplifier, driven by a 40 A, 100 kV, cylindrical electron beam, is studied using numerical simulation and interpreted using Pierce's classical traveling wave tube theory. For an input signal power level of 1.8 kW, particle-in-cell simulations predict gain and bandwidth values exceeding 14 dB and 13%, respectively. For an input signal power level of 7.2 kW, particle-in-cell simulations predict gain and bandwidth values exceeding 12 dB and 15%, respectively, with output power levels exceeding 110 kW at peak gain. Also given are: an assessment of the space charge factor (Pierce's QC parameter) for the complex circuit using simulation data, and an evaluation of the harmonic contents in the beam current.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4964141