The 3-D electromagnetic scattering of plane waves from a right angled
impedance wedge, with one anisotropic face, is addressed. An exact int
egral representation for the total field is obtained by resorting to t
he Maliuzhinets method. The integral representation for the field is d
efined along the Sommerfeld integration path, so that it can be asympt
otically evaluated by standard procedures. The particular kind of anis
otropic impedance considered for one of the faces of the wedge is suit
able for modelling corrugated surfaces or strip loaded grounded dielec
tric slabs, with corrugations or strips perpendicular to the edge.