同轴特性阻抗电磁场综合实验  

Electromagnetic Field Synthesis Experiment on Coaxial Characteristic Impedance

作　　者：骆新江 张忠海 LUO Xinjiang;ZHANG Zhonghai(School of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]杭州电子科技大学电子信息学院

出　　处：《实验室研究与探索》2019年第11期5-8,12,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(61501153);杭州电子科技大学2018高等教育研究资助项目(YBJG201803)

摘　　要：综合应用均匀平面波理论、传输线理论、静电场理论和静磁场理论,从场和"路"两方面分析比较了无耗同轴传输线特性阻抗的计算。利用ANSYS Maxwell软件对4组同轴线内部电磁场分布和分布参数进行了仿真。实验结果显示:同轴线内部电磁场可视化分布图与相关理论相吻合,各组特性阻抗相对误差均小于0.1%。因此该实验方法简单可靠,既能揭露特性阻抗的电磁场本质,又可以提高学生的综合应用能力。Using uniform plane wave theory,transmission line theory,electrostatic field theory and static magnetic field theory,the calculation of characteristic impedance of lossless coaxial transmission line is analyzed and compared from two aspects of field and circuit.Finally,the distribution of electromagnetic field and parameters in four groups of coaxial lines are simulated by ANSYS Maxwell software.The experimental results show that the visual distribution of electromagnetic field in coaxial lines is consistent with the relevant theory,and the relative error of characteristic impedance in each group is less than 0.1%.Therefore,the experimental method is simple and reliable,it not only reveals the nature of electromagnetic field of characteristic impedance,but also improves students'comprehensive application capability.

关 键 词：同轴线 分布电容 分布电感 特性阻抗 电磁仿真 

分 类 号：TN011[电子电信—物理电子学] G433[文化科学—教育学]