SLF/ELF垂直电偶极子在理想导电地-电离层中的场

英文篇名：The Fields Excited by SLF/ELF Vertical Electric Dipole in Earth-ionosphere Under the Ideal Conductor
中文刊名：微波学报
英文刊名：Journal of Microwaves
作者：张在武 ; 段卫星 ; 何京国 ; 王元新
英文作者：ZHANG Zai-wu1 ; DUAN Wei-xing1 ; HE Jing-guo1 ; WANG Yuan-xin2(1.The Earthquake Exploration Institute of the exploration company of Shengli oil field ; Shandong 257086 ; China ; 2.Qingdao Branch ; Chinese Research Institute of Radiowave propagation ; Qingdao 266107 ; China)
中文关键词：垂直电偶极子 ; 球谐级数 ; 加速收敛 ; “舒曼”谐振
英文关键词：Vertical electric dipole ; Spherical harmonic series ; Speed numerical convergence ; Schumann resonance
出版日期：2011-06-15
机构：胜利油田物探公司地震勘探研究所;中国电波传播研究所青岛分所;
年：2011
期：03
出版单位：微波学报

摘要

在理想导电地面与电离层条件下,我们导出了SLF/ELF垂直电偶极子在球形地-电离层壳体中产生的电磁场的球谐级数表达式,并提出了一种加速收敛算法。利用此算法分别算出了电场分量随传播距离、高度及工作频率的变化,所得计算结果与Barrick方法所得结果基本吻合。由于地面和电离层没有吸收损耗,地面与电离层之间产生的场是"驻波",在ELF频段,其频率变化规律能正确反映出"舒曼"谐振现象。
We derive the spherical harmonic series expressions of electromagnetic fields excited by SLF/ELF vertical electric dipole in spherical Earth-ionosphere guide when earth and ionosphere are regarded as the ideal conductor.Moreover,a method to speed numerical convergence has been presented.The electromagnetic fields in the cavity have been calculated by this algorithm.From the result,electromagnetic fields between earth and ionosphere are the sum of two travelling wave in SLF band.The calculated result perfectly agrees with the Barrick's result.Because there is not absorbability attenuation between the earth and ionosphere,the fields in Earth-ionosphere guide are a kind of standing wave.In ELF band,the variation of the amplitude verse frequency coincides with the Schumann resonance.

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