This study reports on a dissipative soliton oscillator utilizing two nonlinear magnetostatic spin wave (MSW) devices in a feedback loop. Both nonlinear MSW devices [a spin wave transmission line (TL) and a signal-to-noise enhancer (SNE)] operate in the frequency band where three-wave parametric processes are allowed. Self-generation of a complex-modulated MW signal is caused by nonlinearity of the spin wave TL. The SNE carries out a passive locking of the spin wave self-modulation frequencies and forms the dissipative soliton trains. It is shown, that electronic control of a repetition interval and pulse ratio of dissipative solitons is realized by the change of a klystron beam current.
This work presents research of noise suppression effect in klystron with delayed feedback by external harmonic and noise signals. Two regimes were investigated -with klystron beam current above and below starting threshold. It is shown, that both systems show SNR increase due to synchronization, which is notable better in regenerative regime with current below starting threshold.
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