δ函数在“电磁场与电磁波”课程中的应用  

The Applications of δ Function in Electromagnetic Field and Wave

作　　者：高玉良[1] 

机构地区：[1]长江大学电子信息学院,湖北荆州434023

出　　处：《电气电子教学学报》2009年第3期42-43,49,共3页Journal of Electrical and Electronic Education

摘　　要：本文介绍了δ函数在电磁场与电磁波中的几个简单应用:一是利用δ函数将各种电荷分布统一用电荷体密度表示,将各种电流分布统一用体电流密度表示;二是将δ函数用于静电场高斯定理的证明,使证明过程简化;三是将δ函数应用于镜像法中,说明为使求出的电势满足泊松方程,像电荷必须设置在待求解的区域之外,让学生更好地理解镜像法。The simple applications of δ function in Electromagnetic Field and Wave are introduced in this paper. Firstly, δ function is used to express the charging distribution with charging density, and the current distribution is expressed with current density. Secondly,δ function is used for demonstrating the Gaussian law of static field. Thirdly,δ function is used in imaging method to help the students better understand the imaging method.

关 键 词：Δ函数 电荷密度 电流密度 镜像法 

分 类 号：TM15[电气工程—电工理论与新技术]