阻抗在电磁场中的推广与应用  

Extension and Applicaton of Impedance in Electromagnetic Fields

作　　者：邓阿丽[1] 张黎明[1] 

机构地区：[1]聊城大学物理科学与信息工程学院,聊城252059

出　　处：《舰船电子工程》2007年第6期181-184,共4页Ship Electronic Engineering

摘　　要：在研究微波甚至更高频段的电磁现象时由于难以给出电压电流的定义,因而传统意义上的电路阻抗概念不再适用。由电路阻抗联系了器件周围电磁场这一物理实质出发,总结电磁场与电磁波中三类阻抗及其在现代电磁工程中的应用,指出电磁波的波阻抗有着明确的方向,表明将阻抗的概念引入电磁场,可以有效地利用电路的概念方法简化对某些复杂电磁场问题的分析。Impedance,a very important concept for the analysis of circuits operating at low frquency,can not apply to the study of electromagnetic phenomena occured in microwave or higher frequency directly because we can not define voltage and current explicitly.From the physical essence of impedance that it contacts E with H,it summarizes the definition and application of impedance in electromagnetic fields and waves and shows clearly that wave impedance has explict direction.Also,it can see the analysis of some complicated electromagnetic fields problems can be simplified using impedance.

关 键 词：阻抗 电磁场 电磁波 电路 

分 类 号：O441.4[理学—电磁学]