MATHEMATICAL SIMULATION AND CALCULATION OF SCATTERING CHARACTERISTICS IN FREQUENCY SELECTIVE PRINTED ANTENNA RADOME
Abstract
Mathematical model of multilayered printed frequency selective surfaces with dielectric covers
is presented in this paper. The model is built on the suggestion of array infinity and perfect
conductivity of microstrip elements. Such printed structures can be used as frequency selective
surface and as covers with controllable characteristics (for example tunable filters, adaptive radar
cover, electronically switched polarizers). Full-wave analysis is executed by the integral equation
method. The numerical solution of an integral equation has been obtained by Galerkin’s method.
Unknown distribution of surface magnetic currents has been approximated by roof-top basic functions.
The generalized scattering matrix method was used for simulation of multilayered printed
frequency selective surface. The paper presents the compound algorithm which combines the integral
equation method with the method of generalized scattering matrix. A lot of numerical examples
are presented proving the algorithm effectiveness. By means of this model there were synthesized
multilayer frequency selective surface as periodic arrays of the printed elements, which have
arbitrary shape of reradiators. It is known, that the printed elements of special shape ensure, as
rejecting and as transacting of electromagnetic waves in the given frequencies, and have neglected
angular sensitivity. The results of constructive synthesis of printed frequency selective surfaces as
rejecting or transmitting filters, which have neglected angular sensitivity, are represented in paper.
Such an algorithm is rather flexible and multiple repeats the basic problem solution. It makes
the procedure of computer code preparing much more effective and do not require to change the
problem decision itself.
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