Khardikov V. Frequency and polarization selection in one- and multielement metal-dielectric UHF structures

The object is diffraction of electromagnetic waves on one- and multielement metal-dielectric structures with axial symmetry and them natural oscillations forming; the purpose is the development of electromagnetic model and effective semianalytical algorithm of compute of characteristics of natural and forced oscillations of metal-dielectric structures with axial symmetry; the methods are the theoretical results were obtained by complex approach, which join direct and approximate mathematical methods and orient on the representation results in the form convenient for engineering applications; the periodic gratings and resistive films were characterised by the equivalent boundary conditions, and the diffraction problems were solved by the method of moment and methods of matrix functions; theoretical and practical new results are the properties of natural and forced oscillations of two type structures were determined; first type of structures is cylindrical resonator with axial symmetric magnetodielectricfilling and longitudinal ring gratings; the second type is a finite periodic sequences of local and resonance scatterers in one mode regime; the theory of finite and semiinfinite periodic sequences of metal-dielectric scatterers with defect was worked out; the work result were used to compute of different radio-scattering materials; a scope is techniques of centimetre and millimetre ranges of wavelength.