On the question of the imposition of the singular edge current behavior

One of the most fundamental and more widely used concepts in electromagnetics theory is the singularity behavior of the current near sharp edges for a TM incident field. One can find an application of this concept in many problems, some of which (i.e. method of moments (MoM)) may require a prescribed imposition of such a condition to solve for the current on the structure. The commonly practised edge condition is depicted where the edge current behavior is represented in terms of (kr)/sup v/ where v=/spl pi///spl alpha/-1, kr/spl Lt/1, r is the distance from the edge and /spl alpha/ is the wedge angle. It should be noted that for the above representation, a singular current behavior is dictated for the case where /spl pi/\n\n\t\t