摘要
雷达能够探测、遥感有限深度海域的海面及附近目标,针对这一需求,采用改进的文氏海谱和Monte Carlo方法模拟有限深度海域海面,选取Debye模型计算海水介电常数,运用时域有限差分法研究了有限深度海域海面电磁散射,仿真了散射系数的角分布曲线。仿真结果表明:散射系数随散射角振荡变化,在镜反射方向处产生散射增强效应;海水深度虽然对散射系数影响较小,但是仍有规律可循,海水深度越大,散射系数越小;海面风速、入射角、风区范围对散射系数影响较大,风速越大,散射系数越小;入射角越大,散射系数越小;风区范围越大,散射系数越小。
In order to meet the needs of radar detection and remote sensing of the sea surface and nearby targets in limited depth sea area,the improved Wen's sea spectrum and the Monte Carlo method are used to simulate the sea surface in limited depth sea area.The Debye model is selected to calculate the dielectric constant of the sea water,and the finite difference time domain(FDTD)method is used to study the electromagnetic scattering from the sea surface in limited depth sea area,and the angular distribution curve of the scattering coefficient is simulated.The simulation results show that the scattering coefficient oscillates with the scattering angle,and the scattering enhancement effect occurs in the mirror reflection direction;although the depth of the sea has a small influence on the scattering coefficient,there are still rules to follow,the greater the sea depth,the smaller the scattering coefficient;sea surface wind speed,incident angle and range of wind area have a greater influence on the scattering coefficient,the higher the wind speed,the smaller the scattering coefficient;the larger the incident angle,the smaller the scattering coefficient;the larger the wind area,the smaller the scattering coefficient.
作者
张童
任新成
朱小敏
杨鹏举
赵晔
ZHANG Tong;REN Xin-cheng;ZHU Xiao-min;YANG Peng-ju;ZHAO Ye(School of Physics and Electronic Information,Yan'an University,Yan'an 716000,China)
出处
《微波学报》
CSCD
北大核心
2023年第2期88-94,共7页
Journal of Microwaves
基金
国家自然科学基金(61861043,61801416,620601048)。
关键词
电磁散射
时域有限差分法
有限深度海域海面
蒙特卡罗方法
散射系数
electromagnetic scattering
finite difference time domain(FDTD)method
sea surface in limited depth sea area
Monte Carlo method
scattering coefficient
