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A novel dual-band, thin and polarization-insensitive metamaterial absorber is proposed, it can realize the perfect absorptivity at 36GHz and 42.1GHz. The perfect absorber has three layers, lossy-FR4 in the middle with copper layers on both sides. The basic geometry of top octangle-shaped resonant copper layer is constructed by the overlapping of three disks. From the surface current distributions...
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