【作者】 吕玥珑； 孟繁义； 张狂； 杨国辉； 傅佳辉； 朱磊； 吴群； 孙立；

【Author】 Lv yuelong;Fan yimeng;Zhang kuang;Yang guohui;Fu jiahui;Zhu lei;Wu qun;Sun li;School of Electronics and Information Engineering,Harbin Institute of Technology;School of Electrical Engineering and Automation,Harbin Institute of Technology;

【机构】 哈尔滨工业大学微波工程系； 哈尔滨工业大学电气工程系；

【摘要】 本文提出了一种可以提高天线定向性及增益的零折射率超常媒质透镜。透镜的超常媒质单元同时具有电谐振结构和磁谐振结构以分别获得接近于零的介电常数与磁导率。利用数值仿真软件CST对该单元进行仿真,观察到在9.9 GHz时,单元介电常数与磁导率均为0.25,不仅具有接近于零的折射率以实现电磁波汇聚,还和空气的特性阻抗相等,与之匹配。选用一个H面喇叭天线测试该透镜的性能,观察到天线E面辐射方向图主瓣大大减小,天线增益提高4.3 dB。更多还原

【Abstract】 A zero index metamaterial lens(ZIML) is proposed in this paper for antenna directivity and gain enhancement.The zero index metamaterial(ZIM) is constructed from both electric metamaterial with near-zero permittivity and magnetic metamaterial-modified split ring resonator(MSRR)-with near-zero permeability.The ZIM unit cell is numerically simulated in CST MWS.Both of the two parameters are of the same value of 0.25,which not only obtains near-zero refractive index but also makes the relative characteristic impedance to be 1 and match that of air.An H-plane horn antenna is implemented to examine the directivity and gain enhancement ability of the ZIML.The E-plane radiation pattern is sharpened greatly.The gain enhancement of H-plane horn antenna is4.3 dB.更多还原