哑铃型互补SRR滤波器的优化和仿真实验分析

Optimization,Simulation and Experimental Analysis on the Dumbbell-Shape Complementary SRR Filters

基于Pendry提出的开口谐振环(SRR)基本理论,结合Falcone建立的SRR互补模型,针对Mohammed构建的哑铃型结构,建立了HFSS模型,完整地仿真了哑铃型互补SRR滤波器主要结构参数对性能的影响,分析了滤波器单元边长、缝隙宽度、缝隙间距、开口宽度、桥接间距和桥接宽度与滤波器中心工作频点、工作带宽和传递系数之间的关系。结果表明,通过调整缝隙宽度和间距能够有效改变滤波器工作频点、带宽和传递系数;增加单元边长,虽可有效降低工作波长,但其带宽和传递系数均会显著恶化;其它参数的改变不会导致滤波器性能发生显著改变。最后,设计了实物样品验证了仿真结果。

Based on the Split Ring Resonators （SSR） theory built by Pendry and the Complementary SRR （CSSR） model presented by Falcone, a Dumbbell-shape structure filter presented by Mohammed has been modeled by HFSS software here, in which effects of the cell edge lengths, slot width, space between two slots, gap width, bridge length and width on the center frequency, bandwidth and minimum St2 value are simulated completely. The result shows that the center frequency and bandwidth will get effectively changed but minimum Sl2 decreased a little by altering the slot width and interval size, the frequency can be changed by adjusting cell length but meanwhile the latter performances will get worse and other parameters do not bring obvious change for the filter performance. Finally, a test sample is designed, manufactured and measured and the results proves the simulation correction.