无限冲击响应滤波器在屏蔽电缆耦合分析中的应用  

Application of IIR filter in the coupling analysis of the shielded cable

作　　者：孙征[1] 石立华[1] 张琦[1] 周颖慧[1] 

机构地区：[1]解放军理工大学电磁环境效应与电光工程国家级重点实验室,江苏南京210007

出　　处：《电波科学学报》2013年第6期1122-1126,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(51077133);教育部新世纪优秀人才支持计划资助(070383)

摘　　要：运用一阶并联结构的无限冲击响应(Infinite Impulse Response,IIR)滤波器模型对转移阻抗和转移导纳进行建模,结合时域有限差分(Finite-Difference TimeDomain,FDTD)法对屏蔽电缆屏蔽层和芯线的时域响应进行同步求解.计算结果表明:该方法可以精确地反映电缆的转移阻抗和转移导纳特性,且易于FDTD算法实现.与传统方法相比,该方法能够得到更完整的芯线响应,从而为屏蔽电缆的时域分析提供更为精确的手段.The infinite impulse response （IIR） filter with the partial fraction expan sion form is employed to model the transfer impedance and transfer admittance of the shielded cable. The models are then incorporated into finite-difference time domain（FDTD） scheme to analyze the coupling of the shielded cable. The humeri cal results prove that the proposed method can provide more precise models of the transfer impedance and transfer admittance, and can be easily combined with FDTD algorithm as well. Compared with the traditional methods, the present one can ob- tain more accurate response of the inner conductor.

关 键 词：IIR滤波器 转移阻抗 转移导纳 屏蔽电缆 FDTD 

分 类 号：TN011[电子电信—物理电子学]