【作者】 闫晨昭； 任新成； 王玉清；

【Author】 Yan Chenzhao;REN Xincheng;Wang Yuqing;School of Physics and Electronic Information Yan’an University;Shaanxi Key Laboratory of Intelligent Processing for Big Energy Data;

【机构】 延安大学物理与电子信息学院； 陕西省能源大数据智能处理省市共建重点实验室；

【摘要】 为了满足分层介质表面与表面粗糙目标的雷达回波特性数据采集和特征提取的需求,利用CAD软件对小车进行几何建模,应用蒙特卡罗方法模拟空气与雪层之间、雪层与土壤之间的分界面以及小车的表面,采用四成分模型模拟土壤的介电常数,运用混合介质介电模型模拟雪的介电常数,通过时域有限差分方法(FDTD)计算了表面粗糙的小车和雪层覆盖的土壤的复合电磁散射特性。计算结果:表明有关结果可为民用、军用领域工程实际提供理论依据和实践方法。更多还原

【Abstract】 To meet the requirements for radar-echo acquisition and feature extraction from stratified media and rough-surfaced targets,a vehicle was geometrically modelled in CAD.Monte Carlo techniques were applied to generate the rough interfaces at air–snow,snow–soil boundaries and over the vehicle surface.Soil complex permittivity was characterised with a four-component mixture model,while snow permittivity was described using a mixed-media dielectric model.The composite electromagnetic scattering from a rough-surfaced vehicle on snow-covered soil was then analysed with the finite-difference time-domain(FDTD) method.更多还原