西安理工大学学报2018，Vol.34Issue(4)：388-394,7.DOI:10.19322/j.cnki.issn.1006-4710.2018.04.002
等离子鞘套随机特性对电波传播影响分析
Effects of random characteristic of plasma sheath on the radio wave propagation
摘要
Abstract
Due to the turbulence, vehicle posture adjustment, non-uniform ablation and other factors, the plasma sheath surrounding the hypersonic vehicle is of random characteristics.The stochastic finite-difference time-domain (S-FDTD) method is a very efficient method for evaluating the electromagnetic (EM) wave propagation in material characterized by uncertainty or variability.In this paper, we extend the original S-FDTD algorithm to simulate the wave propagation in plasma.By the proposed method, the effects of the stochastic characteristics of electron density distribution on EM wave propagation are analyzed.The results show that the variability of the electron density will lead to the jitter in the amplitude and phase of the transmission electromagnetic waves, and that the jitter amplitude has a linear correlation with the intensity of electron density variability.We also find that the higher the plasma collision frequency, the smaller the amplitude and phase jitter of the transmission coefficient under the same variability of plasma electrons density, and that increasing the frequency of the incident wave helps to reduce the amplitude and phase jitter of the transmission coefficient.关键词
等离子鞘套/随机特性/随机时域有限差分法/电波传播Key words
plasma sheath/random characteristic/stochastic finite-difference time-domain/radio wave propagation分类
数理科学引用本文复制引用
刘江凡,李慧,焦子涵,白光辉,席晓莉..等离子鞘套随机特性对电波传播影响分析[J].西安理工大学学报,2018,34(4):388-394,7.基金项目
国家自然科学基金资助项目(61701398) （61701398）
陕西省自然科学基金资助项目(2017JQ6018) （2017JQ6018）
