Two-dimensional image method for time-harmonic line current in front of a PEC cylinder

The well-known electrostatic two-dimensional image theory involving a line charge parallel to a PEC (perfectly electrically conducting) cylinder is ex tended to the electromagnetic problem where the source is a time-harmonic c urrent The image of the current line is presented as a cylindrical surface current obeying an explicit series expression. It is shown that, by choosin g the image cylinder properly, the convergence of the series can be dramati cally improved by extracting a line image source. The expression is seen to reduce to a simple line image besides the static limit case also and when the distance of the line from the surface of the cylinder becomes infinitel y large or vanishingly small. (C) 1999 John Wiley & Sons, Inc.