雨介质的介电常数模型及其参数估计  

The Model of Dielectric Constant for Rain and Estimation of Its Parameters

作　　者：李应乐[1] 

机构地区：[1]咸阳师范学院,陕西咸阳712000

出　　处：《咸阳师范学院学报》2006年第2期23-25,共3页Journal of Xianyang Normal University

基　　金：陕西省自然科学基金资助项目(2005A10);咸阳师范学院科研基金资助项目(05XSYK102)

摘　　要：得出了电磁波在有耗介质中衰减分贝数的表达式,将这种衰减与文献资料相结合,建立了雨介质对电波衰减的等效介电常数的系统辨识模型,得到了该介电常数与降雨率、电波频率的函数表达式。在电波的衰减上,模型所得结果与文献[8]所给结果完全一致,表明了模型的正确性。本章所用方法简单明了,为研究随机粒子对电磁波的衰减提供了一条新的途径。The formula of E.M. wave＇s attenuation in decibel is derived.By combining the attenuation with the reference, the system model of equivalent dielectric constant for rain medium is constructed. The function of dielectric constant versus rain rate and frequency is presented.The results obtained are in agreement with the reference, which indicates the model＇s validity. The method used is of briefness. A new way of investigating the effects induced by random particles on E.M. wave is developed.

关 键 词：等效介电常数 模型 雨媒质 参数 

分 类 号：O441.6[理学—电磁学]