Chaotic Generation in a W-Band Gyroklystron With Delayed Feedback

We demonstrate the possibility of chaotic generation in a gyroklystron by introducing an external delayed feedback. It is shown that for the realization of “developed” chaos regimes with improved spectral uniformity, the region of the phase characteristic of a gyroklystron with rapid phase shift should be used. According to the time-domain-averaged model and direct particle-in-cell simulations with the parameters of the experimentally realized 93-GHz gyroklystron, the chaotic generation power can reach tens of kilowatts with a spectrum width of about 1 GHz.