Theoretical and Experimental Investigation of the Two-Gap Multi-Channel Resonator with Quasi-Fractal Strip Elements

Results of numerical modeling of electrodynamic and electronic parameters and some experimental data of the double-gap multi- channel cylindrical cavity resonator with the suspended dielectric substrate and the quasi- fractal strip inductive elements are given in this article. The quasi-fractal elements were executed in the form of Sierpinski's triangle. Use of a strip element in the form of the Sierpinski's triangle leads to reduction of resonant frequency of an antiphase mode and practically doesn't change an inphase mode. At the same time growth of characteristic resistance R/Q of the resonator is observed. Calculations of electronic parameters have shown a possibility of use the considered resonator in the low voltage multi-beams klystron amplifiers and working without self-excitation.