Analysis of Frequency Selective Surfaces by Spectral Moment Method
Date Issued
2006
Date
2006
Author(s)
Chen, Yu-Tang
DOI
en-US
Abstract
Frequency selective surfaces (FSSs) have inspired great interest because of its filtering property. In general, FSSs comprise periodically arranged metallic patch elements or aperture elements within a metallic screen. The patches exhibit total reflection while the apertures exhibit total transmission in the resonant region.
FSSs have widespread applications over much of electromagnetic spectrum. In the microwave region, FSSs can be utilized in reflector antennas, radome design, microwave monolithic circuit (MMIC) and beam controller. In the infrared region, the FSS is used as polarizers, beam splitters, laser and multiband IR filter. RFID tags, tunable filters, dichroic sub-reflectors, waveguide controlled coupling, reflective lens arrays, and single- and multi-mode array antennas are can be made by FSSs. Recently, metamaterials such as artificial magnetic conductors or left-handed materials also can be realized by periodic structures.
The formulation is described as follows. When incident field propagate through an FSS, and this causes a surface current to be induced on the conducting screens, which in turn, radiate scatter field. Applying boundary condition, we can obtain electric field integral equation (EFIE). Because of periodicity of FSSs, we can utilize Floquet’s theorem to discretize integral equation. We use moment method to solve the induced current. We apply conjugate gradient method and fast Fourier transform for more computational efficiency. Finally, the reflection and transmission coefficient can be obtained from total reflected field and transmitted field, respectively.
Subjects
表面擇頻元件
頻率選擇表面
Frequency selective surfaces(FSS)
metamaterial
artificial magnetic conductor
Type
thesis
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