论文部分内容阅读
单平面双螺旋谐振单元是一种新型左手单元,其现有的等效电路模型存在精确模拟频带窄,低频段拟合特性差等缺陷。针对上述问题,本文提出了单平面双螺旋谐振单元和基于该单元传输线的改进等效电路模型。通过与全波仿真结果进行对比,证明改进等效电路模型的有效性。上述改进等效电路模型可以在1～5GHz频带内对单平面双螺旋谐振单元及基于该单元传输线的电磁特性进行精确模拟。同时,上述模型可以对不同螺旋圈数传输线结构传输系数频率响应变化趋势做出较为准确的预测。所以,改进电路模型可以更有效地描述对应结构的主要工作原理。“,”Uniplanar double spiral resonator is a novel left-handed unit whose existed equivalent circuit model has the disadvantages,such as the narrow frequency band and the poor fitting performance in the low frequency band.According to these problems,we proposed an improved equivalent circuit model of the uniplanar double spiral resonator and the transmission line composed of these units.The validity of these models was verified through comparing the results of full-wave simulation and the ones from the given circuit models.These circuit models can simulate the electromagnetic character of the unit and the transmission line in the frequency band from 1GHz to 5GHz.At the same time,these circuit models can predicate the frequency response of the transmission coefficient which was from the geometrical structures with different spiral rings.Therefore,the given improved circuit models can describe the primary operation principles of the corresponding structures more effectively.