Geometry scaling of UWB antennas with respect to material properties of the substrate

A technique for expedited redesign of UWB antennas for various substrates is presented. Our approach exploits an inverse surrogate model constructed for several reference designs optimized for selected values of the substrate permittivity. The surrogate is set up at the level of coarse-discretization EM simulation model of the antenna and, subsequently, corrected to provide prediction at the level of high-fidelity EM model level. The proposed approach is validated using a UWB monopole with the permittivity scaling range from 2.2 to 6.15.