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In this paper, the effect of microwave absorbing material-based (MAM) substrate on the absorption properties of fractal frequency selective surface (FSS) absorbers was investigated in detail. The fractal shapes were proposed to construct the schematic diagrams of the FSS unit cell. The absorption properties of the absorber samples containing different substrates, including FR-4dielectric substrate...
In this paper, a simple and efficient method, genetic algorithm (GA), for synthesis metamaterials is proposed to develop high absorption, wideband and multi-band absorbers. Several steps are added to the GA to higher its efficiency. We present three representative examples, for both single-layer and multilayer, with different reflectivity objectives which are optimized successfully by the GA. This...
We investigated the influence of dielectric spacer thickness on the metamaterials absorber at microwave frequency. The absorption feature was demonstrated and characterized by the numerical simulations and experiments. The thickness of FR4 spacer was varied to examine the electromagnetic response of the short and long wires structure. It was found that there existed two different absorption mechanisms...
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