Accurate and Efficient Modelling of Wideband Wire Crosstalk With the Method of Moments

Paper in proceeding, 2025

We present an accurate and efficient method for the modelling of wideband wire crosstalk. Our method is based on a macro basis function (MBF) scheme for the method of moments (MoM), to model electrically thin wires that are subject to proximity effects, where the proximity effects imply that the surface current density deviate substantially from the approximations typically used in the literature. We test our method on two crosstalk problems with wires above an infinite ground plane. We demonstrate that the method compares very well with the reference solution computed by a Rao-Wilton-Glisson (RWG) basis MoM solver for general surface geometries. In comparison to the RWG MoM, our method is capable of reducing the total number of degrees of freedom by roughly a factor of four. Also, we demonstrate that the conventional thin-wire MoM and transmission line theory (TLT) yield rather poor results for the test cases considered.