Surface-curvature-induced microwave shadows

Ray behavior and the corresponding fields in the vicinity of surface-curvature-induced reflection boundaries are examined and compared with edge-induced reflection boundaries. The slopes of the reflection boundaries vary, respectively, as
(\lambda)^{-5/6}
and
(\lambda)^{-1/2}
. Asymptotic evaluation of the physical optics scattering integrals leads to the definition of equivalent "diffrhction" coefficients involving the Airy function.