基于亚铁磁材料-YIG的负折射率特异材料的设计及电磁特性研究

摘要

基于磁导率为负的亚铁磁材料-YIG,在其中嵌入等效介电常数为负的金属导体线阵列结构,合成出负折射率电磁特异材料.利用有效媒质理论数值计算了复合材料的等效介电常数与等效磁导率的频率响应特性.计算结果表明存在C波段电磁波频率的重叠区域,使复合材料的等效介电常数与等效磁导率同时为负；表明了利用有效媒质理论基于亚铁磁材料可以设计负折射率特异材料.%A novel method is presented to synthesize the double negative metamaterial by incorporating array of metallic wires into the host media such as ferrimagnet-YIC under an external magnetic bias field. The effective e-lectromagnetic properties of the composite medium are calculated analytically based on the effective medium theory. The results show that the effective permittivity and effective permeability of the composite medium are negative sim-ultaneously in C-band frequency region, and therefore indicate the proposed method to synthesize the negative re-fraction metamaterial is feasible.