摘要
Metamaterials材料结构具有汇聚电磁波的能力,作为天线覆层可以显著提高天线的方向性增益。文中利用有限元法,研究了支撑介质的介电常数、厚度及其位置变化对3种Metamaterials结构聚波作用的影响。仿真结果表明,支撑介质的影响因具体结构不同而有很大差别:介电常数太大都可能使3种Metamaterials结构失去聚波作用;而在3种情况下,介质厚度与相对位置改变则使Metamaterials结构的聚波作用表现出较大的差异。
Metamaterials structures possess the ability to converge electromagnetic wave, so it can enhance remarkably the directivity gain of antenna used as a antenna cover. In this paper, using finite element method, the effects of permittivity, thickness and location of supporting dielectric on converged-wave function of metamaterials are studied. Simulation results show that the effects of supporting dielectric are different with different structures; the larger permittivity would make three types of metamaterial structures lose the ability of converging wave ; for the same three structures, the thickness of dielectric and relative location may also make the converged-wave functions of metamaterials structures exhibit larger difference. These conclusions have some certain guiding significance to engineering applications.
出处
《现代雷达》
CSCD
北大核心
2009年第1期72-75,共4页
Modern Radar
基金
国家自然科学基金项目(60671001)
空军工程大学电讯工程学院博士创新基金项目(200603)
陕西省自然科学基础研究计划项目(2005F21)
西安市工业攻关项目(GG06020)
关键词
复合介质材料
负介电常数媒质
负磁导率媒质
双负媒质
支撑介质
聚波特性
增益
Metamaterials
epsilon-negative material
mu-negative material
double negative material
supporting dielectric
characteristics of converged-wave
gain
