摘要
脉冲在电离层中的传播可用脉冲在有耗冷等离子体中的传播方程来描述。采用指数差分FDTD方法对脉冲在电离层中的传播进行了数值模拟。研究了脉冲在电离层D层、F1层以及F2层中传播时的衰减特性以及反射特性。研究表明,脉冲在D层中衰减较小,在F1层和F2层中衰减比较严重。由计算所得的D层、F1层以及F2层的反射系数以及透射系数可以看出,D层对脉冲整个频段反射很小,而F1层和F2层对脉冲低频段的反射很大。
Electromagnetic pulse propagation in the ionosphere can be described as equations of pulse propagation in consumption and cold plasma.Simulating the propagation of electromagnetic pulse in the ionosphere based on the exponential FDTD method.The attenuation and reflection of the propagation are analyzed in the ionosphere D layer,F1 layer and F2 layer.The results show that the pulse attenuation in the D layer is small,while in the F1 layer and F2 layer are serious.According to the reflection coefficients and transmission coefficients of the ionosphere D layer,F1 layer and F2 layer,can be seen that the reflection of the entire spectrum in the D layer is small,while the reflection of low frequency in the F1 layer and F2 layer is high.
出处
《科学技术与工程》
2011年第19期4449-4452,共4页
Science Technology and Engineering
