雨介质的等效介电常量模型  

Models of Rain Equivalent Dielectric Constant

作　　者：李应乐[1] 黄际英[1] 杨廷梧[1] 

机构地区：[1]西安电子科技大学理学院

出　　处：《光子学报》2003年第3期378-381,共4页Acta Photonica Sinica

基　　金：国家自然科学基金资助项目 ( 6 0 1710 10 )

摘　　要：利用系统辨识法研究了雨介质的介电常量 ,分别得到了毫米波段雨介质的雨强等效介电常量模型和频率等效介电常量模型 ,利用模型计算雨衰减的结果与有关文献完全一致 ,表明所得模型实用有效 ;利用雨强等效介电常量模型得到的电磁波的交叉去极化与文献基本一致 .The dielectric constant for rain medium is investigated by utilizing the system identification method. The rain rate model and frequency model of dielectric constant in millimeter waves band for rain medium are presented. The results obtained with models are in very good agreement with references in calculating the attenuation of electromagnetic waves induced by rain, which shows that the obtained models are valid and practicable. The cross-polar discrimination gotten with rain rate model is in agreement with references.

关 键 词：雨介质 介电常量模型 衰减 毫米波 

分 类 号：O451[理学—无线电物理]