Compact Double -Gap Resonator of Low-Voltage Multi-Beam Klystron with a Strip Resonance Fractal Structure of the Greek Cross Type

In this paper results of modeling parameters of the compact double-gap resonator for 19-beam klystron type devices with a resonant fractal structure of the Greek-cross type for “0-th”, “1-st” and “2-nd” iteration are submitted. Resonance elements made on the central electrodes of a symmetrical high-Q strip line suspended on a dielectric substrate. The resonator has two fundamental modes of oscillation: in-phase and anti-phase. The main mode of the oscillations of the resonator is anti-phase. It corresponds to the X-range of frequencies, the first higher oscillation mode (in-phase) corresponds to the Ku-band. The paper presents the results of calculation: resonance frequency f, shunt impedance R/Q and Q-factor for $\pmb{\pi}$ and $\pmb{2\pi}$ modes of oscillations. The optimal parameters of the interaction process were found also.