高频无线电波在离子层下层的传播特征分析
Atefeh Esmaeili-Karnawah1, Reza Fallah1, Seyed Mohammad Khorashadizadeh1
1Department of Physics, University of Birjand, Birjand, 9717434765, Iran.
Heliyon
|January 6, 2025
概括
高频无线电波在较低的电离层中的传播在夜间更容易. 左侧偏振波传输更好,而相撞频率的下降增强了波传输.
科学领域:
- 空间物理 空间物理
- 电磁主义 电磁主义
- 大气科学 大气科学
背景情况:
- 电离层显著影响无线电波的传播.
- 了解高频 (HF) 波的行为对于通信系统至关重要.
- 以前的研究往往简化了地球磁场的几何形状.
研究的目的:
- 为了数值地研究HF平面电磁波在较低离子层的传播.
- 为了提高准确性,利用现实的地球磁场几何学.
- 分析电子密度,碰撞频率和极化对波传播的影响.
主要方法:
- 对高频平面电磁波 (3-30 MHz) 的数值模拟.
- 包括D和E区域的电离层形状 (白天和夜晚).
- 考虑地球磁场的几何形状和磁角.
主要成果:
- 左手偏振波比右手偏振波具有更高的传输系数.
- 在夜间条件下,波浪传播更有利.
- 与固定配置相比,线性下降的碰撞频率配置增强了波传输.
结论:
- 现实的磁场几何和极化显著影响高频波传播.
- 由于电离层条件,夜间传播通常更容易.
- 碰撞频率概况建模对于准确的传输预测至关重要.
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