FDTD模拟SLF\ELF水平电偶极子在非均匀地-电离层波导中的场  

FDTD analysis of fields excited by horizontal electric dipole in asymmetric earth-ionosphere cavity

作　　者：董慧[1] 闫玉波[1] 李清亮[1] 

机构地区：[1]中国电波传播研究所青岛分所,山东青岛266107

出　　处：《电波科学学报》2010年第2期276-280,共5页Chinese Journal of Radio Science

摘　　要：在SLF/ELF频段,已有的解析算法对于研究其在非均匀电离层模型下的电磁特性有很大的局限性。采用三维球坐标时域有限差分方法(FDTD)计算了非均匀电离层模型下(考虑电离层白天和黑夜不对称),水平电偶极子产生的SLF/ELF波在球形地-电离层腔体中的传播特性。计算了电场分量和磁场分量沿地面随传播距离的变化,以及随方位角的变化。和均匀电离层模型对比,非均匀电离层模型的计算结果更具有实际意义。The presented theoretical methods have difficulty in studying the SLF/ELF frequency band wave propagation characteristic in asymmetric ionosphere.In this paper,three-dimentional（3-D） finite-differece time-domain（FDTD） technique in spherical coordinate is applied to simulate the propagation of the electromagnetic fields excited by SLF/ELF horizontal electric dipole in spherical earthionosphere guide with asymmetric ionosphere（day-night asymmetry）.The propagation characteristic of the electromagnetic wave are calcuated in the SLF/ELF frequency band on the ground.The results of the asymmetric ionosphere is more factual than that of the uniform ionosphere.

关 键 词：FDTD 水平电偶极子 SLF/ELF 

分 类 号：TN011[电子电信—物理电子学]