垂直电偶极子在地-电离层波导中场的球级数解

英文篇名：Spherical harmonic series solution of fields excited by vertical electric dipole in Earth-ionosphere cavity
中文刊名：电波科学学报
英文刊名：Chinese Journal of Radio Science
作者：王元新 ; 樊文生 ; 潘威炎 ; 张红旗
英文作者：WANG Yuan-xin1 FAN Wen-sheng2 PAN Wei-yan1 ZHANG Hong-qi1(1.Qingdao Branch ; Chinese Research Institute of Radiowave Propagation ; Qingdao Shandong 266071 ; China ; 2.The Communication Department of Chinese Navy Headquarters ; Beijing 100841 ; China)
中文关键词：球谐级数 ; 加速收敛 ; “舒曼”谐振
英文关键词：spherical harmonic series ; speed numerical convergence ; schumann resonance
出版日期：2007-04-15
机构：中国电波传播研究所青岛分所,海军司令部通信部,中国电波传播研究所青岛分所,中国电波传播研究所青岛分所山东青岛266071,北京100841,山东青岛266071,山东青岛266071
年：2007
期：02
出版单位：电波科学学报

摘要

在非理想导电地面与电离层条件下,我们导出了ELF/SLF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,采用一种加速收敛算法,算出了波导中的电磁场分布。根据计算结果,在SLF频段,地面与电离层之间的电磁场可理解为二个“行波”的叠加,且与SLF频段的球面二阶近似算法计算结果吻合很好。在ELF频段,壳体中的电磁场是驻波,其频率变化规律能正确反映出“舒曼”谐振现象。
In this paper, the spherical harmonic series expressions of electromagnetic fields excited by ELF/SLF vertical electric dipole in spherical Earth-ionosphere guide taken earth and ionosphere as the imperfectly electric conductor are derived, and a method to speed numerical convergence is presented. The numertical results of electromagnetic fields in the cavity show that the electromagnetic fields between earth and ionosphere may be seen as the sum of two travelling waves, and it is good agreement with that of famous spherical second order approximation for SLF band. Moreover, the electromagnetic fields in the guide are a kind of standing waves, and the variation of the amplitude verse frequency coincides with the schumann resonance for ELF band.

引文

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