CAD models of losses for symmetric elliptical and circular cylindrical coplanar strip lines

This article addresses a CAD-oriented closed-form expressions for dispersive and conductor thickness-based line parameters for symmetrical coplanar strip lines (CPS) on a finite-thickness dielectric substrate. The conductor and dielectric losses are also computed. The models are extended to non-planar CPS - elliptical coplanar strip line (ECPS) and cylindrical coplanar strip lines (CCPS). Finally, accurate circuit model for these structures is also presented. The results between 1 and 60 GHz are compared against the results of HFSS and Sonnet and also against the experimental results. The average deviation of the model against the experimental result is 2.06%.