典型文献
Determine the physical mechanism and source region of beat wave modulation by changing the frequency of high-frequency waves
文献摘要：
This paper introduces a new approach for the determination of the source region of beat wave (BW) modulation.This type of modulation is achieved by transmitting high-frequency (HF) continuous waves with a frequency difference f,where f is the frequency of modulated ELF/VLF (extremely low frequency/very low frequency) waves from two sub-arrays of a high power HF transmitter.Despite the advantages of BW modulation in terms of generating more stable ELF/VLF signal and high modulation efficiency,there exists a controversy on the physical mechanism of BW and its source region.In this paper,the two controversial theories,i.e.,BW based on D-E region thermal nonlinearity and BW based on F region ponderomotive nonlinearity are examined for cases where each of these two theories exists exclusively or both of them exist simultaneously.According to the analysis and simulation results presented in this paper,it is found that the generated VLF signal amplitude exhibits significant variation as a function of HF frequency in different source regions.Therefore,this characteristic can be utilized as a potential new approach to determine the physical mechanism and source location of BW.
文献关键词：
中图分类号：
作者姓名：
Zhe Guo;Hanxian Fang;Farideh Honary
作者机构：
College of Meteorology and Oceanography,National University of Defense Technology,Changsha 410073,China;Department of Physics,Lancaster University,Lancaster,LA14YB,UK
文献出处：
引用格式：
[1]Zhe Guo;Hanxian Fang;Farideh Honary-.Determine the physical mechanism and source region of beat wave modulation by changing the frequency of high-frequency waves)[J].中国物理B（英文版）,2022(02):343-349
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