Application of bilinear quadrilateral modeling to EM scattering problems

The geometry construction of complex objects needs to be firstly considered when calculating the electromagnetic (EM) scattering with integration equation method. It is the base of the EM analysis, determining the accuracy and the time consuming directly. The objects should be set up and be meshed according to some rule before EM analysis. This paper recommends some rules about the surface modeling of the perfect electric conductor (PEC), builds some complex objects through bilinear quadrilateral, and gives the calculation formulas associating with the physical optics (PO) on radar cross section (RCS). The final results indicate that this method is accurate and efficient.