从物理概念理解矩形波导的导波模式  

Understand the Modes of Rectangular Waveguide from Physical Concepts

作　　者：张明[1] 汤一铭 包扬[1] ZHANG Ming;TANG Yiming;BAO Yang(College of Electronic and Optical Engineering College of Flexible Electronics(Future Technology),Nanjing University of Posts and Communications,Nanjing 210023,China)

机构地区：[1]南京邮电大学电子与光学工程学院、柔性电子(未来技术)学院,南京210023

出　　处：《电气电子教学学报》2024年第1期152-155,共4页Journal of Electrical and Electronic Education

基　　金：江苏省自然科学基金项目(BK20200757);南京邮电大学研究生教育教学改革课题(JGKT22-XYB11)。

摘　　要：从导体边界条件出发,解释矩形波导内不能存在TEM^(z)模式,并分析TE_(m0)^(z)模式的场结构。根据波数和驻波概念解释导波的截止与传播以及导波的快波特性。从方向阻抗概念得到模式的波阻抗,最后由色散方程解释导波的色散特性。从物理概念推导出导波模式的各种特性,更有助于学生对导波模式的理解。Starting from the boundary conditions,the modes in a rectangular waveguide are discussed in this paper.The cutoff and propagation of the modes are explained according to the concepts of wave number and standing wave.The wave impedances of the modes are derived from the concept of directional impedance.Finally the dispersion properties of the modes are explained by the dispersion equation.In this paper,various characteristics of the modes are deduced by the physical concepts,which will help students to fully understand the modes in the waveguide.

关 键 词：边界条件 波导 模式 

分 类 号：G426[文化科学—课程与教学论]