Numerical investigation of the field and current behavior near lossy edges

Real circuits involve metallic edges with finite conductivity and nonideal dielectrics. Usually it is more or less implicitly assumed that fields and induced currents behave as if conductors and dielectrics were ideal. In thi s paper, we show that this assumption is partially erroneous and that the p resence ol real conductors and dielectrics seems to lead to a simpler and m ore physical picture, where longitudinal currents are shown to be nonsingul ar.