色散媒质二阶时域参量的演绎  

Deduction of second order time-varying parameter in dispersive media

作　　者：高本庆[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《电波科学学报》2015年第4期635-639,共5页Chinese Journal of Radio Science

摘　　要：为了实现色散媒质二阶时域参量的变换,提出将色散媒质二阶参量演绎为时域参量的方法.以德拜媒质水为对象,依据其本构参量和平面波在空气-水分界面上频域反射和透射系数,先建立其频域超越方程式;再依据易于得到的本构时域参量和待求的时域参量建立起其相应的时域超越方程式,对其用迭代方法可演绎出二阶时域参量.通过时-频变换技术已证明方法的有效性.给出演绎过程和技术要点,并对所得结果进行了讨论,展示了因果关系.本演绎技术具有拓展延伸的潜力.To reach the second order time domain parameter of dispersive medium,a new deduction method is presented.The observed medium is the water of Debye type,where a plane wave is incident upon air-water interface that results in reflection and transmission coefficient in frequency domain.The deduction processes are:the frequency domain transcendental equations of above parameters are first set up;then time domain transcendental equations of above parameters are reached by the transform;based on an iterative process the expected time domain parameters are last found out.In paper the method has been validated.The deduction process and technical points are described.The obtained results are discussed that exhibits causality.It is expected that the deduction method has a potential of extension application.

关 键 词：色散媒质 时域参量 迭代 

分 类 号：O441.4[理学—电磁学]