Efficient full-kernel evaluation for thin wire analysis

An accurate and fast approximation of the full cylindrical kernel in the thin-wire electric-field integral equation is proposed. The presented formulation is accurate for any ratio of the method of moments wire segment length Delta to the wire radius a, and anywhere in space. including on the wire surface. As a numerical example, the input impedance of a center-fed dipole is computed, showing convergence down to Delta/a = 10(-4). A second numerical example shows the application of the model to a complicated geometry a Koch fractal monopole antenna. (C) 2005 Wiley Periodicals, Inc.