雨介质中简单目标的相干散射场  

Coherent scattering fields of simple targets in rain medium

作　　者：李应乐[1] 黄际英[1] 

机构地区：[1]西安电子科技大学理学院

出　　处：《电波科学学报》2003年第2期200-202,215,共4页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目 ( 60 1710 10 );陕西省教育厅自然科学基金资助项目

摘　　要：利用叠加原理 ,导出了离散雨介质中相干散射场与目标散射场的具体表达式 ,数值计算了雨介质中相干散射场与降雨率的关系 ,计算结果表明 :波的衰减不仅与降雨率 ,频率有关 ,而且还与雨区的大小 ,目标尺寸及观察点有关 ;In this paper, the analytical expression of the coherent scattering fields and the target′s scattering fields is presented respectively on the circumstance that target lies in the discrete rain medium. The coherent scattering field varying versus rain rate is numerical computed. The results show that the attenuation induced by rainfall not only relative to rain rate and operating frequency, but also to the sizes of rain area and target, position of observing point. The attenuation per kilometer of scattering field for a target is smaller than that of total filed.

关 键 词：雨介质 相干散射场 目标 电磁波 目标散射场 降雨率 

分 类 号：TN011[电子电信—物理电子学] O451[理学—无线电物理]