CSRR微带线的等效电路模型研究

摘要

首先借助三维全波电磁仿真软件HFSS对CSRR微带线进行了仿真,并引入慢波因子(SWF)分析了其慢波特性.然后根据CSRR微带线幅频曲线的单极点低通特性,以一阶巴特沃斯低通滤波器为原型,建立了CSRR微带线的等效电路模型,通过高频电磁仿真结果和电路仿真结果的对比,二者吻合较好,从而验证了该等效电路模型的正确性和有效性.最后,基于该等效电路模型研究了CSRR的结构变化对其电路特性的影响.CSRR微带线必将在未来微带电路设计中具有广泛的应用前景.%Firstly, the CSRR microstrip line is simulated with the help of the three-dimensional full-wave EM simulation software HFSS. Then, on the basis of single pole low-pass characteristic of CSRR microstrip line amplitude-frequency bight, the equivalent circuit model of the CSRR microstrip line is established according to the Butterworth low-pass filter model. The validity and effectiveness of the proposed equivalent circuit model is verified through comparison of the high frequency EM simulation result and the circuit simulation result, both in good agreement. Ultimately, the influence of the circuit characteristic caused by the structure changes of the CSRR is researched based on the proposed equivalent circuit model. The CSRR microstrip line should have a comprehensive application prospect in the future microstrip circuit design.