同轴电缆的电磁特性可视化模拟与仿真实现

Visible Simulation and Emulation for Characteristics of Electromagnetic Field of Coaxial Cable Wave-Guide

从同轴电缆波导的主模横波(TEM波)出发,对同轴电缆内部的电场与磁场的分布特性进行分析。以波动方程为理论依据,在科学计算与模拟平台的C语言环境中实现对同轴线波导中的TEM波在三维空间的可视化模拟与仿真,使TEM模的电磁场空间变化及分布特性非常直观地体现在三维界面上,将抽象的公式与概念实现可视化,形象逼真地展现出其内部电场与磁场的动态传输变化过程。将该方法运用于电磁场教学中,效果表明,既能使学生加深对同轴电缆波导中电磁场分布特性的理解,又能定性和定量地分析带电量与电介质等参数对同轴电缆波导中电场与磁场的分布规律的变化,进一步增强学生对同轴电缆波导中电磁场分布特性与理论的理解,提高该部分内容的学习效率。

In this paper,the main mode of transverse of electromagnetic(TEM) of the coaxial waveguide,the distribution characteristics of electric and magnetic field inside the coaxial cable are analyzed.According to the wave equation,the scientific calculation and simulation platform based on C++ programming language environment are introduced.The visualization simulation in the form of three-dimensional space distribution of TEM model of coaxial waveguide is done,the dynamic transmission process of the internal electric field and the magnetic field is shown vividly,the formula and the abstract concept of the field of electromagnetic are visualized,the spatial variation of TEM die is directly reflected in the interface,which not only can deepen the concept of electromagnetic theory of coaxial cable in the waveguide effect of understanding,but analyze distribution of charge and dielectric parameters on the electric field and magnetic field of coaxial waveguide qualitatively and quantitatively.It can help the students understand the distribution characteristics and the theory of electromagnetic field coaxial waveguide in the teaching process,the efficiency of learning can be improved.