摘要
研究了利用高阻抗表面改善偶极子天线的辐射性能。在确定合适的高阻抗表面单元数后,分析高阻抗表面反射板与天线间的距离对天线方向图和增益的影响,并提出改善天线驻波和增益的匹配方法:当高阻抗反射板与天线之间距离合适时,通过加载两个对称的贴片可以有效地改善高阻抗反射板与天线阻抗的失配问题。结果表明:高阻抗表面作为天线反射基板可以减小天线系统整体剖面轮廓,利于实现设备小型化。
A high-impedance surface used as the reflector of dipole antenna is discussed. The gain of dipole antenna can be in- creased effectively by high-impedance-surface reflector. For improving the radiation pattern of the dipole antenna appropriate num- bers of cells of high-impedance-surface must be determined. Besides that the influence of the distance between antenna and the re- flector of high-impedance surface has also presented. Simulation has shown that the radiation pattern of the dipole antenna changed with the varying of reflector＇s distance. At the same time a method is presented, which added two metal patches on high-impedance surface, to improve VSWR and the matching property. The results of simulation show that high-impedance surface can be used as antenna reflector to reduce the profile of antenna system and made equipment miniaturization.
出处
《现代雷达》
CSCD
北大核心
2013年第7期50-53,共4页
Modern Radar
关键词
高阻抗表面
辐射方向图
增益
偶极子天线
high-impedance surface
radiation pattern
gain
dipole antenna
