无线传感器网络微型节点设计的电磁建模方法  

Electromagnetic Modeling of Micro Sensor Node for Wireless Sensor Network

作　　者：吴银锋[1] 万江文[2] 冯仁剑[2] 

机构地区：[1]北京邮电大学自动化学院,北京100876 [2]北京航空航天大学仪器科学与光电工程学院,北京100083

出　　处：《北京邮电大学学报》2008年第2期10-14,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：北京市自然科学基金项目(3083024);国家“863计划”项目(2006AA01Z222)

摘　　要：为解决微型无线传感器节点设计过程中无法分析射频微机电(RF MEMS)器件微小可动结构的电磁特性问题,提出一种电磁建模方法——变形时域交替方向隐式有限差分(DADI-FDTD)法.采用有限差分技术,引入时间变量实现一维垂直运动结构动态方程的时域离散;讨论了时域交替方向隐式有限差分(ADI-FDTD)法的三维数值色散关系;提出线性电(磁)介质参数插值的方法,解决了运动结构的机械时空步与电磁时空步的不一致问题,实现了复杂三维动态结构的时域描述.仿真实验验证了该方法可行有效.Modeling radio frequency micro-electro-mechanical system （RF MEMS） device for electro- magnetic analysis is difficulty, especially with small feature size and movable structures. A new electro-magnetic modeling method, deformed alternating-direction implicit method finite difference time domain （DADI-FDTD）, is proposed. The dynamic equation of motion is dispersed in time do- main using finite difference methods （FDM）. Numerical dispersion is discussed in the three-dimensional ADI-FDTD method. A new algorithm, dielectric interpolations, is presented, it is capable of solving the conflict of the time and special steps between the mechanical portion and electromagnetic （EM） portion. And it＇s able to implement the EM modeling in time domain of complex three-dimensional structures. Simulation results demonstrate the feasibility of the method.

关 键 词：无线传感器网络 射频微机电器件 电磁建模 线性插值 

分 类 号：TM154.3[电气工程—电工理论与新技术]