摘要
本文用最速下降法推导了等离子体中双指数脉冲传播的一阶和二阶渐近展开式，并进一步推导了基于一阶渐近展开式的幅度和相位的解析表达式。然后讨论了一阶渐近展开式的精度，并基于一阶渐近展开式讨论了双指数脉冲在等离子体中的传输特性，最后通过数值算例与Hosnon方法和支割线积分法的结果进行比较，验证了渐近展开式的正确性。
In this paper the first and second order asymptotic expansions of the propagated double-exponential pulse through waveguide or plasma are obtained by using the steepest descent method, and the analytical expressions for the amplitude and phase function of the first order expansion are derived. The characteristics of the propagation procedure are then discussed based on the first order asymptotic expansion. Numerical examples are given and compared with the results of Hosono's method and Branch Cut Integration (BCI)-IFFT method to validate the results.
出处
《微波学报》
CSCD
北大核心
1998年第3期189-196,共8页
Journal of Microwaves
基金
国家自然科学基金!69671017
