Features of spectral characteristics of open resonance electrodynamic systems with periodic metal-dielectric structures

The results of numerical and experimental model operation of diffraction and Cerenkov radiations in resonance periodic metal-dielectric structures are given in work. The general legitimacies of undular processes in system dielectric layer-tape diffraction lattice-screen are established. The results of multiply connected systems researches executed as OR (open resonator) with MDS (metal-dielectric structure) are given. It is shown, that such system possesses qualitatively new properties, in comparison with OR without MDS: embodying of energy oscillation attenuation modes in OR, or increases of amplitude oscillation and their quality factor, selection of oscillations is possible by change of dielectric thickness and values ε. The given results specify on perspective of use OR with MDS in the selective and generator devices EHF.