The use of curl-conforming basis functions for the magnetic-field integral equation with MLFMA algorithm

Divergence-conforming Rao-Wilton-Glisson(RWG) functions are commonly used in integral equations to model the surface current distributions on planar triangulations. In this paper, a novel implementation of the magnetic-filed integral equation (MFIE) employing the curl-conforming n×RWG basis functions and testing functions is introduced to improve the current modeling. Implementation details are outlined in the contexts of the moment of method, the method of MLFMA algorithm. Based on the examples of electromagnetic modeling of perfect electrical conducting scatterers, It is demonstrated that significant improvement in the accuracy of the MFIE can be obtained by using the curl-conforming n×RWG functions.