基于非均匀FDTD混合算法的微带电路电磁耦合分析  

Coupling analysis of printed circuits based on non-uniform FDTD hybrid algorithm

作　　者：唐新飞 廖成[1] 叶志红[2] 冯菊[1] Tang Xinfei Liao Cheng Ye Zhihong Feng Ju(Institute of Electromagnetics, Southwest Jiaotong University, Chengdu 610031, China School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]西南交通大学电磁场与微波技术研究所,成都610031 [2]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《电子测量技术》2017年第9期116-120,共5页Electronic Measurement Technology

基　　金：国家重点基础研究发展计划(973计划)(2013CB328904);中央高校基本科研业务专项资金(2682015CX062)资助项目

摘　　要：微带电路包含微带线以及电路元件等局部精细结构,采用传统的FDTD方法进行电磁波照射PCB板电磁耦合的全波模拟,因网格剖分得很细,导致网格量大,计算效率低下。将非均匀FDTD方法与多网格集总元件FDTD方法结合起来,形成一种新的FDTD混合算法,模拟了电磁脉冲对带有集总元件微带电路的电磁耦合,能够快速计算得到集总元件上耦合产生的瞬态电压和电流响应。通过与有限积分法软件的仿真结果进行对比,验证了该时域混合算法的正确性,并分析了不同电磁脉冲类型以及微带线线间距对微带电路电磁耦合的影响。Printed circuit usually makes up of microstrip lines ,circuit elements and other parts of fine structures, using traditional FDTD method to simulate the electromagnetic interference of PCB board irradiated by Electromagnetic wave will lead to low computation efficiency due to a large amount of grids . In this paper,a novel hybrid algorithm in FDTD is proposed,in which the Non-uniform FDTD method and multi grid lumped element FDTD method are integrated together. As an example, the coupling problem of microstrip circuit with lumped elements excited by electromagnetic pulse is simulated and it is observed that the Transient voltage and current response of lumped elements can be rapidly obtained. Then the correctness of the hybrid method is verified with comparing with the simulation results of electromagnetic software based on the finite integral method. Finally the influences of types of electromagnetic pulses and the space between microstrip lines on the electromagnetic coupling of the printed circuit are analyzed.

关 键 词：非均匀FDTD 集总元件FDTD 多网格模型 微带线 

分 类 号：TN702[电子电信—电路与系统]