【摘要】 基于DGS结构和双层SRRs结构,提出了一种工作于双频段的微带线结构的新型左手介质,它除了频带宽和损耗小外,还具有体积小、结构简单便于加工的优点.基于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微带线的有效介电常数和有效磁导率,并进一步得到了电波在微带线上传播时的波数随频率的变化曲线,结果表明文中讨论的左手介质微带线确实在较宽的频段上表现出后向波特性,从而证实了左手介质的存在.更多还原

【Abstract】 A double band left-handed(LH)microstrip is designed based on defected ground structure(DGS)and Split Ring Resonators(SRRs)with broad bandwidth and low loss while the size of the unit cell is small and the synthesis is simple.Its effective permittivity and permeability are both extracted from the transmission and reflection data of the left-Handed microstrip,then the wave number k is calculated,and the results demonstrate that the LH microstrip shows backward wave(BW)properties in the broad frequency range of interest.更多还原