左手材料微结构构型的传输线比拟模型

提出了基于传输线比拟模型的左手材料微结构设计方法,并对此进行了分析、验证.首先根据已有的具有左右手性质的基本传输线模型,通过类比构建了具有左手性质的新模型,进而通过定性分析传输线网络中的各元件与微结构连续介质构型的形状及尺寸的对应关系,推断出模型中各部分的具体尺寸,从而得到了一个合理的左手材料微结构构型及其对应的传输线比拟模型.对设计的模型进行了实验测试,验证了模型确实具有左手性质.最后,通过数值模拟和实验,研究了微结构的各个尺寸参数对材料出现左手性质的带宽和频段的影响,确定了微结构中对左手性质影响最大的尺寸参数.

Transmission line analogy model of left-handed metamaterials microstructure configuration

In this paper, based on the equivalent transmission line model a method of designing left-handed metamaterials micro-structures is proposed, verified and analyzed. Firstly, according to the basic transmission line model with left and right-handed characteristics, we build a new left-handed model by analogy. Then according to the qualitative analysis of the corresponding relationship of each component in the transmission line network to the shape and size of continuous medium micro-structure configuration, the specific size of model is inferred, and thus a reasonable left-handed metamaterials micro-structure configuration and the corresponding transmission line model are established. We have conducted a series of tests including numerical simulation, which verifies that there does exist the left-handed characteristic in a certain frequency band. Finally based on the numerical simulation and experiment the effects each micro-structural parameter on left-handed frequency position and bandwidth are analyzed, and the size parameter that affects the left hand characteristic most seriously is determined.