Full wave multiple scattering from rough surfaces

Using the full wave approach to rough surface scattering, the single and the double scattered electromagnetic fields from a perfectly conducting one-dimensionally rough surface are computed. The full wave expressions for the single and the double scattered far fields are given in terms of integrals. Double scatter in the backward direction from perfectly conducting surfaces is larger than single scatter only for near normal incidence when the rough surface mean square slopes are very large. The results could shed light on the observed fluctuations in the enhanced backscatter phenomenon as the angle of incidence varies from near normal to grazing angles.<>