RCS characterization of perforated apertures in a finite ground plane

The authors compare the results on the bistatic RCS (radar cross section) for a plane wave incident on two triangular apertures in a finite square ground plane using PO (physical optics) and MoM (method of moments) approaches. The results are compared for a finite-sized ground plane with no holes, a finite ground plane with two well-spaced holes, and a finite ground plane with two closely spaced holes. The solid plate is a well-studied problem and is used to establish a reference, while the other two cases are used to understand the effects the hole separation has on the results.<>