设计了一个由周期排列的金属电谐振环(the electric ring resonator,ERR)与短导线(FR-4基板上)组合而成的超材料吸波体.在某一频段,该超材料吸波体能同时产生强的电谐振与磁谐振.采用数值仿真方法,在8-12GHz波段计算了该超材料的S参数,并分析了其吸收率变化规律.单层超材料吸波体在9.27GHz处达到吸收峰,吸收率达97.9%.通过调节电谐振器中开口的长和宽,以及基板电磁参数,即可实现对谐振频率的调谐.利用等效电路法,对其吸收规律做了解释.%We present the simple designs of metamaterial absorbers which are composed of periodic array of the electric resonance ring,FR4 substrate,and short wires. The metamaterials can provide the electric and magnetic resonances overlapping in the given frequency range. By use of the numerical simulation method we computed the S parameters,and figured out the absorbance in 8-12 GHz range. A single unit cell layer demonstrates a peak greater than 98.7％ at 8.92GHz. Studies suggests that by adjustment the length and width of the ERR split or substrate parameters , the resonance frequency will change,and the absorption band could be tuned. In addition,we introduce a capacitor-inductor circuit description of the design and we show that this description can account for all the characteristics of its electromagnetic behavior,explaining its superior performance.
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