Modeling of the coupled microstrip lines with using numerical conformal transformations

Computer aided microstrip lines modeling has been performed by conformal mapping technique. A new approach to reduce the connectivity order of the original cross-section geometry of the structure is proposed. The multiply connected domain is reduced to simply connected ones by implementation of magnetic slits concept. The microstrip lines structures analysis is carried out by numerical conformal transformations technique realized in Schwarz-Christoffel toolbox for MATLAB. This technique is applied to the quasi-static analysis of coupled microstrip lines taking into account the conductor thickness. Described approach ensures high numerical efficiency and can be used for accurate analysis of complex strip and microstrip structures.