Abstract :
Owing to the bear variation of the odd- and even-mode capacitances in terms of the dielectric constant epsilonr, of the substrate, it has been possible to obtain formulas giving all the electrical characteristics of the Iines for given values of the ratios, width w and separation s of the lines upon height h of the dielectric substrate. Conversely, by means of charts, it is possible to obtain the geometrical dimensions of the Iines, whatever the value of epsilonr, for the imposed matching impedance and coupling coefficient. The use of these charts is very easy, and the results are the closest to experimental data published to date.
