带状线SIR带通滤波器的等效电路分析方法  

An equivalent circuit analysis method for striplines SIR band-pass filter

作　　者：于正永[1] 

机构地区：[1]淮安信息职业技术学院计算机与通信工程学院,江苏淮安223003

出　　处：《兰州理工大学学报》2015年第6期90-92,共3页Journal of Lanzhou University of Technology

基　　金：江苏省高校"青蓝工程"资助项目(苏教师(2014)23号);江苏高校品牌专业建设工程资助项目(苏教高(2015)11号)

摘　　要：运用传输线基本理论推导出双开路线加载的耦合带状线传输矩阵解析公式,在已有的开路线和阶梯跳变不连续性等效电路模型的基础上,提出一种带状线阶梯阻抗谐振器(SIR)带通滤波器等效电路分析方法.结合实例进行验证和分析,该等效电路分析法所得结果与仿真软件HFSS仿真结果吻合良好,S参量的平均误差小于2%,而传统的传输线理论法由于未考虑开路线、阶梯跳变等不连续性部件产生的传输损耗在中心频率处发生了偏移.By using principal theory of transmission line,the analytic expressions of transmission matrix are derived for coupled striplines with double open lines（OPL）loading,and then a novel equivalent circuit analysis method is presented for the band-pass filter of striplines step impedance resonator（SIR）on the basis of the obtained open lines and steps discontinuity equivalent circuit models.Through a practical example,this analysis method is verified and it is found that it is in good agreement with the result of simulation software HFSS,and the average error of S parameters is less than 2%,while the method on traditional transmission line theory will lead to an obvious deviation at central frequency due to its neglect of transmission losses in the discontinuous device of open lines and steps.

关 键 词：带状线 阶梯阻抗谐振器 带通滤波器 等效电路 

分 类 号：TN713[电子电信—电路与系统]