Dual-Band absorber based on metamaterial
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Abstract
This paper presents an simulation study using CST microwave studio. In this work very simple design are used based on metamaterial to construct perfect metamaterial absorber. It is a semi-square copper loop placed on top of dielectric layer to separate from a ground plate. This structure provides two perfect absorption region with absorption peaks in average 99.98%. This absorption is due to dipole resonance in the main and secondary diameter of the semi-square ring. In addition, the dimensions changes of the metal ring and the thickness of the dielectric layer leads to good tuning in resonant frequency and absorption level. Additionally the possibility of producing a broad-band absorber that can be used in energy harvesting applications and protection from the effects of electromagnetic waves. The simulation results approve scaling structure can be work at terahertz frequency. which may contribute to potential applications in many photonic technology areas.
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