An improved hybrid technique for computing the RCS of dihedral corner reflector with a protrusion

For the EM scattering problems of electrically large dihedral corner reflector with electrically small protrusion, the traditional MoM-PO hybrid method cannot efficiently consider the complex multi-reflection effects among the PO regions. Based on the classical MoM-PO method, an improved hybrid method is presented to calculate the multi-reflection contribution in the PO region efficiently by introducing the method of SBR based on RDN notion that avoids the complex iterative procedure. Simulation results agree with the numerical results very well.