РЕЗУЛЬТАТЫ ЧИСЛЕННОГО ИССЛЕДОВАНИЯ ХАРАКТЕРИСТИК РАССЕЯНИЯ АНТЕННЫХ ОБТЕКАТЕЛЕЙ НА ОСНОВЕ МЕТАЛЛОДИЭЛЕКТРИЧЕСКИХ ДИФРАКЦИОННЫХ РЕШЕТОК

Abstract

Mathematical model of multilayered printed frequency selective surfaces with dielectric coversis presented in this paper. The model is built on the suggestion of array infinity and perfectconductivity of microstrip elements. Such printed structures can be used as frequency selectivesurface and as covers with controllable characteristics (for example tunable filters, adaptive radarcover, electronically switched polarizers). Full-wave analysis is executed by the integral equationmethod of electromagnetics. The numerical solution of an integral equation has been obtained byGalerkin’s method. Unknown distribution of surface magnetic currents has been approximated byroof-top basic functions. The generalized scattering matrix method was used for simulation ofmultilayered printed frequency selective surface. The paper presents the compound algorithmwhich combines the integral equation method with the method of generalized scattering matrix. Alot of numerical examples are presented proving the algorithm effectiveness. By means of thismodel there were synthesized multilayer frequency selective surface as periodic arrays of theprinted elements, which have arbitrary shape of reradiators. It is known, that the printed elementsof special shape ensure, as rejecting and as transacting of electromagnetic waves in the givenfrequencies, and have neglected angular sensitivity. The results of constructive synthesis of printedfrequency selective surfaces as rejecting or transmitting filters, which have neglected angularsensitivity, are represented in paper. Such an algorithm is rather flexible and multiple repeats thebasic problem solution. It makes the procedure of computer code preparing much more effectiveand do not require to change the problem decision itself.