太赫兹波在粗糙金属球体目标上的散射特性  

Scattering characteristics of THz wave on rough metal sphere target

作　　者：杨洋[1] 

机构地区：[1]承德石油高等专科学校河北省仪器仪表工程技术研究中心,河北承德067000

出　　处：《太赫兹科学与电子信息学报》2014年第6期783-787,共5页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家重点基础研究发展计划资助项目(2007CB310403)

摘　　要：太赫兹波在粗糙金属球面散射中相干散射与非相干散射同时存在。在低频端散射主要为相干散射,而相干部分随球表面粗糙度增大迅速递减;在高频端散射主要为非相干散射,且散射结果与辐射的分布方式及分布规律有关,结果通常不是唯一的。高端与低端的散射结果通常相差很大,但当粗糙金属球表面的粗糙度服从高斯分布时,高频端雷达散射截面的结果与低频端雷达散射截面的结果近似一致。Coherent scattering and incoherent scattering can be both found in the scattering research of terahertz wave on rough metal sphere target. Coherent scattering mainly happens in low frequency region, which will decrease rapidly as the sphere roughness increase. Incoherent scattering is mostly found in high frequency region, which is related to the mode and the regularity of radiation distribution as well.According to the study, the scattering results in low and high frequency regions are quite different from each other. The two scattering results appear to be approximately consistent when the sphere roughness isin Gaussian distribution.

关 键 词：太赫兹雷达散射截面 相干散射 非相干散射 粗糙金属球体 目标特性 

分 类 号：TN011[电子电信—物理电子学]