预测毫米波雾衰减的抛物方程模型研究  

The Parabolic Equation Model for Estimating Fog Attenuation at Millimeter Wavelengths

作　　者：盛楠 廖成[1] 张青洪[1] 陈伶璐[1] 周海京[2] 

机构地区：[1]西南交通大学电磁场与微波技术研究所,四川成都610031 [2]北京应用物理与计算数学研究所,北京100094

出　　处：《电子学报》2014年第5期958-962,共5页Acta Electronica Sinica

基　　金：国家自然科学基金委和中物院联合基金(No.U1330109);中央高校基本科研业务费专项(No.SWJTU12ZT08);中物院复杂电磁环境科学与技术重点实验室课题(No.FZ2012-2-O1)

摘　　要：雾是影响毫米波通信系统性能的典型气象条件之一.针对传统经验模型无法精确预测多径效应下的电波传播问题,给出了基于抛物方程的雾衰减预测模型.以自由空间雾特征衰减的预测为例,将本文模型与Rayleigh近似及经验模型的计算结果进行对比,验证了该方法的可靠性.最后将该模型应用于预测35 GHz和94 GHz毫米波在分别含有平流雾和辐射雾的复杂环境中的传播特性,仿真结果表明该模型有效地反映了地形绕射、地表反射等对电波传播的影响,为快速准确地预测复杂地理环境及特殊气象条件中的电波传播特性提供了一种有效的预测模型.Fog is one of the crucial factors in determining the performance of millimeter-wave communication systems. Be- cause of the fact that the multipath propagation is not be taken into account by the traditional empirical formulae,this paper developed a parabolic equation model for estimating fog attenuation. The fog attenuation rate predicted by the model agrees well with that obtained by the Rayleigh approximation and an empirical formula, which verify the accuracy of our method. Finally, the model is applied to simulate the propagation characteristics of millimeter-wave at frequency of 35 GHz and 94 GHz in Advection fog and Radiation fog with complex environments,respectively. The results demonstrate that the model can take account of wave diffraction and reflection, and thus our scheme provides an efficient numerical method for computation of the propagation characteristics of miUimeter-wave in complex environments.

关 键 词：抛物方程 雾衰减 复杂环境 毫米波 

分 类 号：TN011[电子电信—物理电子学]