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Analysis of scattering characteristics of 3-D objects with rough surfaces

The split-and-project method is introduced to modeling the 3D objects with rough surfaces. With this method, the blunt-nosed cone (BNC) and delta-wing aircraft (DWA) are taken as examples to build the rough objects. The bi-static RCS of the rough objects are then simulated through Physical Optics (PO) method under different correlation length and root-mean-square (rms) height. Results indicate that the correlation length matters more than the latter on the RCS and DWA is more susceptible to the roughness of the surface.