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中文摘要：
以二阶、三阶基函数为例，应用高阶有限元-边界积分法分析了二维散射体电磁散射特性。计算了几种二维方柱（导体和介质）的雷达散射截面，结果与矩量法一致，对三种数值结果进行了误差分析。结果表明：高阶有限元-边界积分法比一阶有限元-边界积分法有着更高的计算精度、收敛速度和计算效率。
英文摘要：
Using the second- order and third - order basic functions, the high - order Finite Element Method （FEM） in conjunction with Boundary Integral Method （BIM） is used to analyze electromagnetic scattering characteristics of two- dimensional objects. As the examples,the Radar Cross Sections （RCS） of some two- dimensional square cylinders（conductor and dielectric） are calculated,the results agree well with those obtained by Method of Moments （MOM）. The error of result is analyzed. Compared with first- order FEM - BIM, numerical results suggest that the high - order FEM - BIM has higher precision,faster convergence rate and more efficiency.
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