Abstract
In the paper, the analysis of electromagnetic wave scattering from frequency selective surface is presented. The surface is composed of periodically arranged posts. The multimodal scattering matrix of such structure is derived and the transmission and re∞ection characteristic for the structure with arbitrary plane wave illumination are calculated. The exact full-wave theory based on the mode-matching method is applied to develop an e-cient theory to analyze such structures. The validity and accuracy of the approach are verifled by comparing the results with those obtained from alternative methods. The analysis of plane wave scattering form the frequency selective surface (FSS) composed of periodic arrangements of scatterers is conducted in this paper. The constructive elements of this structure are comparable in size to the operation wavelength and are composed of conducting and dielectric material. FSSs when multilayered can be utilized as an electromagnetic band structure (EBG) in microwave wavelength range or photonic band structure (PBG) in optical range. Recently, EBGs and PBGs are of great interest due to their extraordinary properties and potential applications, e.g., fllters, polarizers, substrates for radiating elements, or optical switches (1{14). Many numerical techniques have been utilized to investigate band gap structures. The most popular are the cylindrical-harmonic expansion method (15), the flnite element method (16), the flnite difierence method (17), and Fourier modal method (18). FSSs can also flnd application in polarizers
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