Radar Absorbers Based on Frequency Selective Surfaces on Perforated Substrates
Abstract:A new type of metamaterials is introduced which can be fabricated by printing metal patches on inhomogeneous, periodic substrates. Such structures without periodic substrate are known as Frequency Selective Surfaces (FSS) but they are more promising for EMC shielding than common FSS structures because both the effective dielectric permittivity and loss of the substrate can be controlled. A numerical method based on the combination of Rigorous Coupled Wave Analysis (RCWA) and Method of Moments (MoM) is applied for the analysis of plane-wave incidence. Using both an advanced micro-genetic algorithm and a randomly initialized hill-climbing algorithm, the introduced structures as well as the conventional frequency selective surfaces with homogeneous substrates are optimized to be used as radar absorbing surfaces. The results show that better performance might be obtained when textured substrates are applied.
Document Type: Research Article
Publication date: 2008-04-01
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- Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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