Thin wire modeling in FD-TD

A comparative study between different approaches to modeling thin wire scatterers using the finite-difference-time-domain (FDTD) numerical technique is presented. These approaches include nulling of the electric fields on the wire, modeling the wire to be one FDTD cell in thickness, and contour integral wire modeling. The method of moments adopted by the numerical electromagnetic code is used as a basis for comparison. The equal cell area-wire cross-section procedure gave accurate results but was expensive in memory requirements, while the contour integral method provided an efficient and accurate wire modeling technique.<>