Large-Signal Simulations of a Novel FoldedWaveguide Traveling-Wave Tube
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Graphical Abstract
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Abstract
A novel Folded waveguide (FW) ampli¯er
for Traveling-wave tubes (TWT) was investigated. It is
formed by adding rectangular grooves periodically to the
bends of a normal FW. In order to test its performance, a
three-dimensional Particle-in-cell (PIC) code MAGIC was
used to simulate the large-signal beam-wave interaction. It
proves to be a potential device for producing more than two
times higher Continuous wave (CW) power with a much
shorter circuit compared to a normal FW. The band per-
formance is also good in above 2GHz. Furthermore, the
novel FW e®ectively improves the problem that gain of a
normal FW decreases at higher working frequencies due
to diminishing of interaction impedance. This novel FW
therefore promises a high power and miniaturized circuit
for millimeter wave TWT.
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