微波超材料隐形结构及其新型快速实验方案

A quick novel experimental method of metamaterial electromagnetic cloaking structure at microwave frequencies

基于Maxwell方程组在坐标变换下的协变性,利用柱坐标变换以及开口谐振环周期排列而形成的超材料设计了一个工作于10.14GHz频率下的隐形结构.采用一种新型快速实验方案测量微波信号强度.实验结果表明在外围增加了隐形结构之后,圆柱金属的阴影和散射效应都被削弱,得到了预期的隐形效果.该实验系统降低了系统的结构复杂性并缩短了实验周期,为该领域的研究提供了一种新的简单有效的实验方案.

Based on Maxwell＇s equations＇form-invariance to coordinate transformations,an electromagnetic cloaking structure at 10.14 GHz was designed by cylindrical coordinate transformation and made with metamaterial composed of split-ring resonators.A quick novel experiment method was used to measure the power level of the received microwave signal.The cloaking structure reduced scattering from the hidden object and meanwhile reduced its shadow effect,which was consistent with theoretical expectations.The experiment system reduced the complexity and shortened the time of measurement,which provided a new simple and effective experimental method in this field.