基于快速物理光学法的太赫兹目标RCS计算  

RCS Simulation of Targets in THz Band Based on Fast Physical Optics Algorithm

作　　者：江月松[1] 张志国[1] 华厚强[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《光学学报》2014年第12期68-74,共7页Acta Optica Sinica

基　　金：国家863计划(2012AA8126XXX)

摘　　要：研究了一种基于快速物理光学法(FPO)计算太赫兹(THz)波段目标雷达散射截面(RCS)的方法。将目标散射体分解成若干个子区域,经相位补偿后计算出每个子区域的散射特性,经过插值、相位恢复和聚合得到整个散射体的散射特性,并对FPO在THz波段的应用进行了讨论。仿真结果表明:利用FPO法计算THz目标的RCS,能够在保证准确性的前提下,大大提高计算效率,节省计算时间。该研究对于THz波段的快速目标识别和成像有着重要的意义。The method for the calculation of radar cross section （RCS） of targets in terahertz （THz） band based on fast physical optics （FPO） algorithm is presented. The scatterer is divided into subdomains and the scattering characteristics of each subdomain are computed after the phase compensation. Through interpolation, phase correction and aggregation, the scattering characteristic of the whole scattering body is abtained, and the applications of FPO in THz band are discussed. Simulation results show that the targets＇ RCS calculation by FPO in THz band can greatly improve the computational efficiency and save computing time in the premise of ensuring the accuracy. This research has an important significance for fast target recognition and imaging in THz band.

关 键 词：成像系统 太赫兹 雷达散射截面 物理光学法 快速算法 

分 类 号：O441.4[理学—电磁学]