Fast and simple CAD-oriented closed-form formulas for double-sided coplanar strip lines

Closed-form analytical expressions suitable por CAD software packages are p resented for calculating the quasistatic TEM parameters of the double-sided coplanar strip line (DS CPS). Tt has been shown that the present transmiss ion line reduces to practical values the characteristic impedance of the co nventional CPS. Furthermore, the effect of dielectric overlaying on the qua sistatic parameters of the DS CPS is discussed by using the present express ions derived by the conformal mapping techniques. This paper's results are compared with the results available in the literature. (C) 1999 John Wiley & Sons, Inc.