人工合成负折射率微波媒质的一种新方法

A New Method to Synthesize Microwave Substance of Negative Refractive Index

提出了以外加磁场作用时磁导率为负的亚铁磁材料-YIG为基体,在其中嵌入等效介电常数为负的金属导体线阵列宏结构,人工合成出负折射率微波媒质的新方法。利用有效媒质理论数值计算了复合媒质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,使复合媒质的等效介电常数与等效磁导率同时为负;验证了新型负折射率微波媒质合成方法的可行性。

A novel method is presented to synthesize Negative Refractive Index Material （NRIM） by incorporating array of metallic wires into the host media such as ferrimagnet-YIG under an external magnetic bias field. The effective electromagnetic 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 simultaneously in C-band frequency region, and therefore indicate the proposed method to synthesize NRIM is feasible.