Equivalent inductances of coplanar-stripline step discontinuities

The equivalent inductance of an equivalent circuit model to characterize a coplanar stripline (CPS) step discontinuity is analyzed based on the duality concept of alternatively determining the equivalent capacitance of its complementary structure, i.e., the coplanar waveguide (CPW) step discontinuity in the free space. In this study numerical results for CPS step discontinuity structures, obtained from the equivalent circuit model and full-wave moment simulator, are presented and compared with the measured data. Good agreement among these results reveals that this model is useful in characterizing the CPS step discontinuities.