新型小型化的平面左手介质微带线及其后向波特性验证

基于裂缝谐振环结构的降频技术，首先设计了一种电尺寸较小的左手介质微带线单元，并根据电磁波在微带线上的传输和反射数据，分别计算了左手介质的有效介电常数和有效磁导率.之后针对左手介质八元阵列进行三维电磁仿真实验，结果表明该八元阵列在左手介质频段上具有独特的后向波效应，从而证实了该左手介质频段的存在.与传统的左手介质微带单元相比，阐述的左手介质单元的电尺寸减小了60%，而且结构简单，便于加工，适用于平面电路器件的小型化等应用研究工作. 关键词： 左手介质 小型化 双负特性 后向波特性

Novel miniaturized planar left-handed metamaterial transmission lines verified by the backward wave property

Based on the technique of reducing working frequency of split ring resonators (SRR)，this paper presents a miniaturized left-handed metamaterial transmission line unit，and retrieves the effective permittivity and permeability parameters from the transmission and reflection data. To verify the presence of the left-handed frequency band，3D numerical simulation is conducted to an array of left-handed metamaterials including eight units，which demonstrates that the left-handed metamaterial microstrip line can support unique backward wave property very well. Compared with conventional left-handed microstrip lines，this structure has been reduced by 60% in electrical sizes，and would be more convenient for fabrication in applications as miniaturized planar circuit components.