Insulated Oblique Thin Wire Formalism in the FDTD Method

Recently, we have introduced a new approach based on Holland's formalism to deal with oblique thin wire in the finite-difference time-domain (FDTD) method. Here, we propose an original technique to model accurately dielectric coated thin wire, which can be freely inclined or shifted in the FDTD grid. In addition, the multiwire junction of oblique thin wire formalism is extended by means of a rigorous equivalent circuit diagram of the insulated wires. The approach facilitates complex modeling of cables embedded in lossy dielectric medium including buried insulated cables. It exhibits same accuracy as in integral equation method. However, the FDTD method shows better efficiency in time computational as soon as the application includes a soil or when increasing complexity and density of the modeling structure.