Covered coupled microstrip lines with ground planes of finite width

Hybrid boundary element method (HBEM), developed at the Faculty of Electronic Engineering of Niš, is used to determine characteristic parameters of a covered coupled microstrip lines with ground planes of finite width. This method is based on the combination of equivalent electrodes method (EEM) and boundary element method (BEM). All results for the characteristic impedance of observed microstrip line are compared with corresponding ones obtained by the finite element method. Even and odd modes are taken into account.