磁场积分方程矩量法中基函数的立体角修正

The Solid Angle Revision of the Magnetic Field Integral Equation with Linear Triangle Basis Functions in Moment Method

本文通过考察电磁散射问题矩量法求解中电场积分方程和磁场积分方程的公式 ,分析了在使用三角屋顶基函数情况下传统的磁场积分方程在计算带有棱角的电小尺寸金属物体雷达截面时存在的不足 ,提出了一种基函数的立体角修正技术 ,从而达到了减小计算误差的目的。计算结果表明了算法的有效性。

In this paper an insight into the magnetic field integral equation with triangle rooftop basis functions used in moment method is presented. The drawback of the conventional MFIE MoM caused by the improperly assumed solid angle of basis functions is pointed out when compared with the EFIE MoM in the case of sharp cornered bodies of small electrical dimensions. A way of solid angle revision is introduced to reduce the RCS computation errors of the MFIE MoM. The effectiveness of the algorithm is demonstrated by numerical results.