A quantitative study on convergence property of electrical field integral equation

As the first kind of Fredholm integral equation, the Maxwell's electric field integral equation (EFIE) possesses a two-branch spectrum- one branch approaches infinity while the other approaches zero. Under fine discretization by method of moment (MoM) the convergence rate is a main indicator of reliability for simulation. This paper quantitatively investigates the convergence rate under integration schemes with different precisions. Numerical experiments demonstrate: integration with higher precision brings not only higher accuracy but also fewer iteration times.