Theoretical Analysis of Downward Propagation Attenuation of ELF Radiation in Ionosphere

YANG Ju-tao; LI Qing-liang; HAO Shu-ji; DONG Hui

doi:10.3969/j.issn.0372-2112.2020.12.005

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Theoretical Analysis of Downward Propagation Attenuation of ELF Radiation in Ionosphere

更新时间：2025-12-08

- Theoretical Analysis of Downward Propagation Attenuation of ELF Radiation in Ionosphere
- Acta Electronica Sinica Vol. 48, Issue 12, Pages: 2319-2325(2020)
- 作者机构：
  
  1. 中国电波传播研究所青岛分所,山东,青岛,266107
  2. 电波环境特性及模化技术重点实验室,山东,青岛,266107
  3. 中国电波传播研究所青岛分所,山东,青岛,266107
  4. 电波环境特性及模化技术重点实验室,山东,青岛,266107
- 作者简介：
- 基金信息：
  
  China Electronics Technology Group Corporation Technology Innovation Foundation (No.KJ1602004);Fund of State Key Laboratory of Electric Wave Environment Characteristic and Modular Technology (No.6142403180308)
- DOI：10.3969/j.issn.0372-2112.2020.12.005
  CLC： P352.3P353.3
- Published Online：25 December 2020，
  
  Published：2020
- 稿件说明：
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YANG Ju-tao, LI Qing-liang, HAO Shu-ji, et al. Theoretical Analysis of Downward Propagation Attenuation of ELF Radiation in Ionosphere[J]. Acta Electronica Sinica, 2020, 48(12): 2319-2325.
DOI：

YANG Ju-tao, LI Qing-liang, HAO Shu-ji, et al. Theoretical Analysis of Downward Propagation Attenuation of ELF Radiation in Ionosphere[J]. Acta Electronica Sinica, 2020, 48(12): 2319-2325. DOI： 10.3969/j.issn.0372-2112.2020.12.005.

摘要

利用大功率高频（HF）电波调制加热电离层可在电离层中有效形成辐射源，并用于辐射ELF电磁波.本文基于磁流体力学的基本方程通过对电离层中极低频（ELF）辐射源的辐射场分析，获得ELF电磁波在电离层中传播的色散关系式，建立电离层中的ELF辐射源向下传播衰减模型.并依据建立的传播衰减模型，分析不同纬度地区传播衰减的差异，以及传输频率和背景电离层参数对传播衰减的影响.

Abstract

Sources and resultant radiations of extremely low frequency (ELF) electromagnetic waves can be effectively generated via modulated heating of the ionosphere by powerful high-frequency (HF) waves. With fundamental equations of magneto-hydrodynamics

the radiation field of the ELF radiation source in the ionosphere is derived. The dispersion relation of ELF waves propagating in the ionosphere is then obtained and the downward propagation attenuation model is established. According to this model

the differences of propagation attenuation in distinct latitudes and influences of transmitting frequency and ambient ionospheric parameters on propagation attenuation are analyzed. It is shown that the relative attenuation rate is raised with increase of the geomagnetic inclination and firstly rises and then falls with increase of the transmission frequency

resulting in an optimal transmission frequency value at which the relative attenuation rate reaches minimum. With enhancement of electron density or electron temperature

the relative attenuation rate rises and its growth rate drops.

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Related Institution

College of Physical Science and Technology,Sichuan University

Institute of Electronics,Chinese Academy of Sciences

College of Physical Science and TechnologySichuan UniversityChengduSichuan 610065China

Institute of ElectronicsChinese Academy of SciencesBeijing 100800China

Institute of Applied Electronics,China Academy of Engineering Physics,P.O.Box 919-1015

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