采用金属网格和泡沫材料实现低折射率材料媒质，并对其参数进行了优化，辐射源采用单极天线，制作了样机。利用HFSS电磁仿真软件对应用低折射率材料媒质天线与传统天线的方向性进行了对比研究，并研究了辐射源的参数对定向天线的性能影响。对样机进行了测试，测试结果与仿真结果比较吻合，与传统天线相比较，基于超低折射率特异材料的天线方向性明显提高。因此，选择适当电磁参数的超低折射率特异材料，用于定向天线的设计，可以改变传统天线的设计。

Based on a low refractive index material medium using metal mesh and foam material, a microwave antenna with monopole radiation was made. Antenna directionality of the traditional antenna and the antenna using low refractive index medium was studied contrastively by the HFSS (electromagnetic simulation software). The comparison results indicated that antenna directionality of the antenna using low refractive index medium was better than that of the traditional antenna. An experiment was conducted to measure antenna directionality of the antenna using low refractive index medium. Good agreement was obtained between the experimental results and the theoretical predictions.