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| 地下SLF/ELF水平电偶极子在球形地-电离层中产生的场 | |
| 引用本文： | 王元新,潘威炎,金荣洪,张红旗. 地下SLF/ELF水平电偶极子在球形地-电离层中产生的场[J]. 电波科学学报, 2009, 24(6) |
| 作者姓名： | 王元新 潘威炎 金荣洪 张红旗 |
| 作者单位： | 1. 上海交通大学电子工程系,上海,200240;中国电波传播研究所青岛分所,山东,青岛,266071 2. 中国电波传播研究所青岛分所,山东,青岛,266071 3. 上海交通大学电子工程系,上海,200240 |
| 基金项目： | 国家科技支撑计划"基于空间对地观测的地震监测技术预测方法与应用示范" |
| 摘 要： | 在非理想导电地面与电离层条件下,导出了地下SLF/ELF水平电偶极子在地上、地下及电离层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,算出了大气层及电离层中的电磁场分布.计算结果表明:地下几十公里的水平电偶极子产生的场除了增加了一个固定衰减外,与地面上的水平电偶极子产生的场分布完全相似,它产生的电磁场可理解为电波首先垂直地透过土壤,然后在地一电离层腔体中传播.在SLF频段,地一电离层空腔中的电磁场可理解为两个"行波"的叠加.在ELF频段,空腔中的电磁场是驻波,其频率变化规律能正确反映出"舒曼"谐振现象. |
| 关 键 词： | 水平电偶极子 地一电离层空腔 球谐级数 "舒曼"谐振 |
Electromagnetic fields in spherical earth-ionosphere excited by SLF/ELF underground horizontal electric dipole |
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| WANG Yuan-xin,PAN Wei-yan,JIN Rong-hong,ZHANG Hong-qi. Electromagnetic fields in spherical earth-ionosphere excited by SLF/ELF underground horizontal electric dipole[J]. Chinese Journal of Radio Science, 2009, 24(6) | |
| Authors: | WANG Yuan-xin PAN Wei-yan JIN Rong-hong ZHANG Hong-qi |
| Affiliation: | WANG Yuan-xin1,2 PAN Wei-yan2 JIN Rong-hong1 ZHANG Hong-qi2 (1.Dept. of electronic Engineering,Shanghai Jiaotong University,Shanghai 200240,China,2.Qingdao Branch,Chinese Research Institute of Radiowave propagation,Qingdao Sh,ong 266107,China ) |
| Abstract: | The spherical harmonic series expressions of electromagnetic fields excited by SLF/ELF underground horizontal electric dipole on the ground,under the ground and in ionosphere have been derived when earth and ionosphere are regarded as the non-ideal electric conductor. Analgorithm of improving the speed of convergence is presented. The electromagnetic fields in the air and ionosphere have been calculated by this algorithm. The results indicate that the fields excited by the underground horizontal electric di... |
| Keywords: | horizontal electric dipole earth-ionosphere cavity spherical harmonic series Schumann resonance |
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