基于零折射超材料的双频高增益微带天线

A Novel Dual- Band High-Gain and High-Directivity Microstrip Patch Antenna Based on Zero-Index Metamaterial

基于双面对称单环开口谐振器对结构奇异的电磁特性,设计了一种频率可控的各向异性零折射超材料。将这种零折射超材料应用于普通双频微带天线,制备了中心频率为5.15GHz和6.8GHz的零折射双频微带天线。仿真和测试结果显示,由于零折射超材料的引入,天线的侧向辐射减弱,方向性增强。在低频工作时,零折射微带天线E面和H面半功率波束宽度分别减小了29°和10°,增益提高了2.2 dB。在高频工作时,零折射微带天线E面和H面半功率波束宽度均减小了16°,增益提高了2.4 dB。将零折射超材料应用于微带天线的介质基板,为高性能双频微带天线设计提供了有效途径。

Based on special electromagnetic characteristic of dual-layer symmetry single ring resonator pair cell,a novel anisotropic metamaterial is designed. A novel of dual-band zero-index microwave antenna of 5. 15 GHz and 6. 8GHz is proposed with an application of zero-index metamaterial structure. Compared to the conventional microwave antenna,the results show that the performance of the dual-band zero-index microstrip antenna has improved remarkably,which has a lower lateral radiation,an enhanced forward radiation. At lower operating frequencies,the half power beam widths( HPBW) of Eand H-plane of the zero-index microwave antenna is reduced by 29° and 10°,respectively,the gain is increased by 2. 2 dB.At higher operating frequency,the HPBW of the zero-index microwave antenna is reduced by 16° for both E- and H-plane,an increasing of 2. 4 dB for the gain. It is an efficiency method to design dual-band microwave antenna with good performance by applying zero-index metamaterial in the antenna.