Integral singularity reduction by the localy continuous basis functions used in moment method with electric fidld integral equation
电场积分方程矩量法中具有局部连续性的基函数积分奇异性降阶处理

A new symmetrical formulation without O(1/R2) singularity is presented to calculate the impedance matrix elements as long as the rooftop basis functions have the character of local continuity. With this new formulation, one needs only take care about the O(1/R) singularity that is very easy to resolve. Several different types of rooftop basis functions are analyzed and compared, on which our formulation is applied. Numerical results are presented which have proved the validity, the efficiency and the universality of the new formulation.