根据电磁场在包层边界应满足的基本关系，建立了描述其带隙结构的特征方程，给出了特征方程迭代求解的算法描述，为电磁波传播特性数值仿真分析提供了理论基础。
With the boundary conditions satisfied by the electromagnetic fields in the interface between the crystal and the clad, the characteristic equation to describe the band gap structure is deduced.
本文根据电磁波的传播特性，研究在涂型层状介质中传播规律。
Based on the propagation Characteristics of electromagnetic wave, the propagation law is studied in the Precoat layered media in the article.
另外还计算了高频电磁波在海面上传播过程中遇到岛屿遮挡及越过岛屿后继续向前远距离传播的传播特性。
Then the transmission characteristics of the HF electromagnetic wave is calculated when the wave meets the islands and also when it leaves the islands several kilometers.
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