一种新的混合基函数在电磁散射问题中的应用

三维电磁散射问题通常采用电场积分方程(electric field integral equation,EFIE)结合矩量法(meth-od of moment,MoM)求解,而基函数是决定矩量法计算精度和效率的重要因素。采用具有降维效果的双线性四边形模型来模拟实际物体表面,提出了一种基于该四边形的混合域基函数,应用于金属物体的电磁散射特性的计算仿真中。该混合域基函数集成了分域基和全域基的优点,结果表明,相比于基于三角形剖分的RWG函数(rao,wilton and glisson,RWG),混合基函数能够在减少未知数个数的同时获得较高的计算精度,具有计算精度高、速度快、内存要求低的特点。

Application of a new hybrid basis function of MoM to electromagnetic scattering problems

The electromagnetic scattering prediction of three-dimensional objects is often treated with EFIE-MoM,and the basis function is one of the important factors affecting the accuracy and efficiency of the method.Bilinear quadrangular with reduced-dimension effect is used to simulate the real surface of the complex object,and a new hybrid basis function based on this quadrangular is presented.The hybrid basis function that incorporates the advantages of sub-domain and entire-domain within MoM is used for the calculation of RCS on metal objects,the accuracy and efficiency of the proposed function are demonstrated by numerical results.