A comparative study of volumetric vs. subcell modeling of thin-wire structures in FVTD

Unstructured time-domain solvers such as the finite-volume time-domain method have the capability to directly model very fine geometric features. Nevertheless, subcell thin-wire models are beneficial for reducing the number of volumetric cells. In this work, we compare broadband network parameter extraction when wires are modeled by volumetric discretization and fed by appropriately selected port models versus wires modeled using a mesh-independent thin-wire model. The results of these methods are compared to measurements for broadband S-parameter extraction of a simple monopole antenna.