基于双线性基函数磁场积分方法的研究  

Research of Magnetic-Field Integration Method Based on Linear-Linear Basis Functions

作　　者：万心悦 蒋年德[2] 刘耀成 吴聪平 WAN Xin-yue;JIANG Nian-de;LIU Yao-cheng;WU Cong-ping(Yangtze River College,East China University of Technology, Fuzhou 344000, China;School of Information Engineering, East China University of Technology, Nanchang 330013, China)

机构地区：[1]东华理工大学长江学院,江西抚州344000 [2]东华理工大学信息工程学院,江西南昌330013

出　　处：《东华理工大学学报（自然科学版）》2021年第2期196-200,共5页Journal of East China University of Technology(Natural Science)

基　　金：东华理工大学长江学院院长基金项目(2190000071)。

摘　　要：为解决计算目标散射时磁场积分方程精确度较低这一问题,提出使用双线性基函数应用于磁场积分方程分析目标散射问题。推导了双线性基函数填充磁场积分方程的矩阵阻抗元素并对其采用奇异值提取法进行处理,从而对目标结构的双站RCS进行计算和分析。结果表明,双线性基函数相较于传统的平面RWG基函数,在使用相同甚至尺寸更大的剖分面片拟合目标散射体表面,即在保证不增加计算量的同时,能够有效提高磁场积分方程在计算曲面结构和尖锐结构散射问题时的精确度。The accuracy of the magnetic field integral equation is low when the target scattering is calculated by traditional planar RWG basis functions.In order to solve this problem,a bilinear(linear-linear)basis function is proposed.The matrix impedance elements of the magnetic field integral equation filled by bilinear basis functions are derived and programmed.Then the bistatic RCS of the target structure is calculated and analyzed.The results show that compared with the planar RWG basis function,the bilinear basis function can use the same or even larger splitting patch to fit the surface of the target scatterer.In other words,the accuracy of the magnetic field integral equation can be effectively improved and the error can be reduced without any additional computation.

关 键 词：计算电磁学 双线性基函数 平面RWG基函数 磁场积分方法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]