Evaluating the RCS Contribution of Geometrical Singularities: an Analytical Model

In the context of radar detection, the assessment of Radar Cross Section (RCS) requires computing the scattered electromagnetic field using numerical solvers. In order to study the potential contribution of geometrical singularities to the object’s RCS, we propose an analytical model, applicable to Perfect Electric Conductors (PEC) in the case of Bodies of Revolution (BOR). The method based on physical optics is valid for small profile variations in the object’s illuminated region. The proposed model is validated for a circumferential slot. Further, the proposed approach can be extended to a statistical description of the geometry variation. As an illustration, the RCS contribution of a random surface roughness is evaluated.