Application of a novel formulation to the MFIE using RWG basis functions in method of moments

We investigate the inaccuracy of the traditional magnetic field integral equation (MFIE) in the analysis of scattering of small conducting objects, with the use of Rao–Wilton–Glisson (RWG) basis functions. As a remedy to such problems, we propose to use a novel impedance matrix elements (IME) formulation of the MFIE, which is suitable to use RWG basis functions. Techniques to calculate the IME of the new formulation are outlined. It is shown that similar technique to compute the IME of the MFIE resulted from the use of curl-conforming basis functions can also be used here. Based on the examples of several relatively small conducting objects, it is demonstrated that significant improvement in the accuracy of the MFIE can be obtained for this new IME formulation with the use of RWG basis functions.