Contribution of a single face to the wedge diffracted field

In certain wedge diffraction problems, it is advantageous to know the part of the diffracted field created by the currents induced on a single face of the wedge. The rigorous solution to the corresponding canonical problem is derived. This solution indicates which part of the uniform theory of diffraction (UTD) solution for the wedge-diffracted field should be taken to describe its single-face component.