Analysis of Scattering and Radiation of Mixed Conducting/Dielectric Objects Using MLFMA

A scheme is presented to apply multilevel fast multipole algorithm (MLFMA) to analyze the scattering and radiation for three dimensional (3D) objects comprising conducting and dielectric bodies. Applying equivalence principle, PMCHW formulations are used on the surface of the 3D dielectric bodies and EFIE is used on conducting surface. The far-field matrix-vector multiplication and the near-singular problems are analyzed. Application of MLFMA reduces the memory requirement and computational complexity of the MOM solution significantly, which renders us to analyze the electrically large objects. Numerical examples are presented to demonstrate the accuracy and high efficiency.