基于人工电磁材料的微带贴片天线频带展宽

基于人工电磁材料的微带贴片天线频带展宽

内容简介：提出一种以人工电磁材料作为介质基板的矩形微带贴片天线.通过改变人工电磁材料各单元的几何尺寸来控制介质基板的参数变化,以构成非均匀介质基板,使得贴片辐射边的辐射性能提高,从而有效提高了带宽.对设计的非均匀介质微带天线使用HFSS软件仿真.结果表明,普通均匀介质微带天线电压驻波比VSWR≤2时带宽只有0.5 GHz,相对带宽为6.7%,而以人工电磁材料为非均匀介质基板的微带天线VSWR≤2时带宽达到1.6 GHz,相对带宽达到20.0%.

Abstract：A rectangular microstrip patch antenna with a inhomogeneous dielectric substrate made by the metamaterial was presented. The inhomogeneous dielectric substrate and variations of the substrate parameters could be achieved by modifying the geometry magnitudes of the metamaterial elements. The patch antenna bandwidth broadening was achieved when the permittivty of the substrate was properly adjusted. Finally the antenna with inhomogeneous dielectric substrate was simulated by HFSS software. The result shows that the bandwidth of the common microstrip patch antenna with the uniform dielectric substrate is 0.5 GHz (VSWR≤2) and the relative bandwidth is 6.7%, while the antenna with metamaterials gets the bandwidth of 1.6 GHz and the relative bandwidth of 20.0% (VSWR≤2).

作者：李靖, 丁君, 郭陈江, 徐千,

关键词：微带贴片天线, 带宽, 人工电磁材料,