近零介电常数材料常用于口面加载以修正天线波前相位,提高口径效率。在对以往金属线阵周期结构研究基础上,提出了介质镀膜板周期结构的近零介电常数材料,并基于NRW本构参数法计算得到了该材料的等效介电常数,依据口面相位差平方和最小原则研制了中空形式的介质镀膜中空板加载结构。实验结果表明,X波段角锥天线加载后其主轴增益最大提高了1.8 dB,口径效率从原有0.4提高至0.6以上,相对工作带宽大于10%。

A new innovative horn antenna loaded with epsilon-near-zero(ENZ) metamaterial for phase compensation and gain enhancement is studied in this paper. The dielectric coating metallic grid with hollow structure was designed and tested based on the principle of antenna aperture phase distribution minimum variance, and an equivalent circuit model of ENZ metamaterial was established for the research of electromagnetic response of the period structure. The experiment results show that the gain has improved 1.8 dB and the aperture efficiency has improved from 0.4 to 0.6, the relative bandwidth is better than 10% by using epsilon-near-zero metamaterial proposed in this paper.