理想介质中电磁导波特性的FDTD分析

Using FDTD to study the medium

采用时域有限差分方法(FDTD)模拟了电磁波入射一维无限大均匀介质平板时的情形,分析了介质介电系数、电导率以及介质厚度对电磁波传播的影响.结果表明:介质的介电系数影响电磁波的反射系数,介电系数越大,反射系数也越大;介质的电导率影响电磁波在介质中的衰减指数,电导率越大,则电磁波衰减得越快.

The Finite-Different Time-Domain is used to simulate the condition of Hertzian waves Which incise one dimension infinity uniformity medium. Hertzian waves are analyzed by the infection of dielectric constant, conductance and medium thickness. Result indicates that： the dielectric constant of medium affects the reflect coefficient of Hertzian waves. The bigger the dielectric constant is, the bigger the reflects coefficient is;The conductance of the medium affect the attenuation index of Hertzian waves in medium. The bigger the conductance is, the quicker the Hertzian waves attenuate.