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A time-dependent self-consistent large-signal simulation code for gyroklystron is developed and the key technologies involved are introduced. To validate the code, a Ka-Band gyroklystron amplifier is simulated and the effects of time step and space step are observed, which lead up to a coarse criterion about the choice of appropriate time step and space step so as to take consideration of both computation...
An analysis of harmonic reduction with negative dispersion for broadband helix Traveling-Wave tubes (TWTs) is put forward. The synchronization of the harmonic content is reduced by the decrease of the phase velocity of fundamental wave demonstrated by the field relative phase. A 6∼18GHz TWT is designed with a negative dispersion to improve the output power at low frequency by harmonic reduction and...
A one dimensional nonlinear time-dependent theory for helix traveling wave tubes in beam-wave interaction is studied. A generalized electromagnetic field is applied to the expression of radio frequency field. The substitution of a spatial average over a wavelength for a time average over a wave period is used in the equation of radio frequency field. The space charge field of electron beam is treated...
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