The electron-beam-breakup transit-time oscillator has been investigated via theoretical analysis and computer simulation as a high-power microwave generator. Coupling the beam-breakup instability with the transit-time effect of the electron beam in the cavity, rapid energy exchange between the electrons and cavity modes can occur. Furthermore, the transit-time resonance naturally leads to narrow-band output. Driven by a high-current electron beam, the beam-breakup transit-time oscillator can be a compact source for high-power (>1 GW) operation. Good agreements have been obtained between linear theory and simulation.
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Kwan et al. (1991) studied this question.
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