摘要
指数逼近法解决了被积函数指数项中波数 k 为复数的索末菲积分,该法应用围线定理变换积分路径,把索末菲积分简化为几项解析式的近似和,它具有近似精度高,计算速度快和几乎不受频率限制的特点.
After the path of Sommerfeld integral is changed according to Cauchy theo- rem,the partial Sommerfeld integrand function is approximatcd by a complex exponential series and Sommerfeid integral is simplified the sum of several algebra terms for complex wavenumber in exponent of Sommerfeld integrand function.Satisfied accuracy and high computing velocity are acquired and the method is hardly restricted by frequency.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1992年第1期70-74,共5页
Journal of University of Electronic Science and Technology of China
关键词
索末菲积分
指数逼近
电波传播
Sommerfeld integral
exponent approximation
Prony method
Cauchy integrals
