“…Because MR functions are expressed as linear combination of original RWG functions, the use of MR basis amounts in practice to a transformation of the MoM matrix, which can improve the convergence of iterative methods. The new integral equations to improve the conditioning include the integral equations based on Calderon projection [ Andriulli et al , ; Christiansen and Nedelec , ], the current and charge integral equation [ Taskinen and Yla‐Oijala , ], the separated potential integral equation [ Gope et al , ], the augmented electric field integral equation [ Liu and Jiang , ; Qian and Chew , ], and etc.…”