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We demonstrate the results of theoretical analysis and numerical simulation of a two-stage multiple-cavity klystron oscillator. We develop the small-signal theory of the oscillator, which predicts start-oscillation current and oscillation frequency. Results of 1.5-D particle-in-cell simulation of the oscillator with different number of cavities are presented. The numerical results are in good agreement...
A two-stage oscillator consisting of two coupled three cavity klystrons is studied. A small-signal theory of this oscillator is developed, which predicts start-oscillation current and oscillation frequency. Results of 1-D particle-in-cell simulation of the W-band oscillator are presented. The numerical results are in good agreement with the small-signal theory. The simulations predict over 400 W output...
Time-domain modeling of vacuum tubes is important for theoretical analysis of spurious oscillation, amplification and generation of short pulses and complex multifrequency, or chaotic signals. In this paper, a time-domain model of a klystron delayed feedback oscillator is presented. The model is based on the nonstationary Vainshtein theory of cavity excitation and the 1-D particle-in-cell method for...
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