RCS of creeping wave for shadow region of wing leading edge

Scattering mechanism of creeping wave for shadow region of wing leading edge was analyzed. A calculating model of radar cross section (RCS) for shadow region creeping wave of leading edge was presented. Far-field back scattering electromagnetic formulas of creeping wave was given on the basis of uniform geometrical theory of diffraction (UTD) of smooth convex surface, and the contribution of creeping wave was calculated in terms of RCS definition. The characteristic of geodesic on arbitrary convex surface was analyzed with differential geometry. A method of solving geodesic was given based on the condition that the geodesic curvature of geodesic was zero on smooth convex surface. The creeping wave on leading edge of the wing was calculated, and effect of different parameters of wing was calculated and analyzed. The agreement of the calculating results with the experimental results indicates this method could be used to estimate the creeping wave RCS quickly and effectively in engineering analysis.