一种新型网状结构的零折射率超材料

摘要

A fishnet structure of zero-index metamaterial composed of a square metal ring,square pieces of metal and cross wire is proposed.The simulation calculation and retrieved results indicate that the effective permittivity and permeability of the proposed structure close to 0 at the frequency of 11.54GHz when normal linearly polarized wave incidence directly,and the experimental results coincide with the simulation results.Through a prism simulation,the simulation calculation results support the idea of where the zero-index frequency point should be generated,the transition from a negative-n region to a positive-n region.Thus,the result demonstrates that the proposed structure indeed exhibits a balanced property with a negative-zero-positive behavior.%提出了一种由方形金属环、方形金属片及十字形金属线组成的网状零折射率电磁超材料结构.通过CST仿真计算其传输参数,利用电磁参数反演算法得到结构的等效电磁参数.结果表明,当电磁波垂直入射时,该结构在11.54 GHz附近其等效介电常数、等效磁导率同时接近零,在该频点附近处折射率为零,实验测试与仿真结果基本一致.通过棱镜仿真研究验证,该结构在该频点处可从负折射区域向正折射区域转换,说明该结构是具有“负-零-正”折射率的平衡结构.