Analytical model of losses for symmetric elliptical coplanar strip lines

The paper addresses a CAD oriented closed-form expression for dispersive and conductor thickness based line parameters for symmetrical coplanar strip lines(CPS) on a finite-thickness dielectric substrate. Then, based on the analysis of CPS's, elliptical coplanar strip line (ECPS's) is studied. CAD oriented closed-form expression for the losses based on stopping distance for ECPS's is obtained. The expressions are simple and accurate for microwave circuit designs and are applicable to both thin and thick conductors. Comparisons with published data from full-wave methods, experiments, HFSS and SONNET are presented to validate the expressions derived for all the cases. The average deviation of the model against the experimental result is 2.06 %.