Application of Multibranch Rao-Wilton-Glisson Basis Functions in Electromagetic Scattering Problems

The application of multibranch Rao-Wilton-Glisson (MB-RWG) basis function in analyzing electromagnetic scatterings from perfect electrically conducting (PEC) targets is presented in this paper. MB-RWG functions have the properties of RWG functions to expand surface currents. Moreover, MB-RWG functions can be defined on the boundary between two surfaces with different mesh resolutions. The branch number varies according to the mesh element sizes of two adjacent surfaces. Hence, MB-RWG functions can be flexibly used in analyzing electromagnetic targets with surface integral equations. Numerical results verified the versality of the MB-RWG basis functions.