摘要
推导了计算一维时变磁化等离子体的时域有限差分(finite difference time domain,FDTD)的递推式,分析了一维情况下的时变等离子体中电磁波的频域特性,并通过选取算例,验证了该方法的准确性。对将等离子体频率按时间分为3个阶段的复杂情况进行了计算分析,通过改变时变磁化等离子体占空比,得出了时变磁化等离子体对电磁波有频率漂移和频谱展宽等规律。
The finite difference time domain （FDTD） formulas for one-dimensional time varying plas ma are deduced. Characteristics of electromagnetic wave in the time-varying plasma of one-dimensional ca- ses are analyzed. The accuracy of the FDTD method is proven to be correct by the comparison of numeri- cal results and theoretical analysis. The complex issue that the plasma frequency is divided into three time-accordantly stages is also calculated by the modified method. By the comparison of electromagnetic wave in time-varying plasma with different duty cycles, the conclusions of frequency drift and spectral broadening are obtained.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2013年第6期1148-1154,共7页
Systems Engineering and Electronics
基金
国家自然科学基金面上项目(61072002)
高等学校博士学科点专项科研基金(20093227120018)
江苏省第八批次"六大人才高峰计划"项目资助课题
关键词
时域有限差分方法
时变等离子体
频率漂移
占空比
finite difference time domain （FDTD） method
time-varying plasma
frequency drift
duty ratio
