Modified desegmentation technique in analysis of arbitrary shaped planar circuit

This article introduces a simple technique in two-dimensional multiport method for analysis of planar circuits. This technique is applicable to configurations which have been analyzed by desegmentation method with electric wall boundary condition at the removed parts. Analysis of planar circuits with metallic vias is performed faster and more accurate by this technique, because there is no need to make the curved electric wall boundary discrete. In addition, proposed method is numerically stable. Substrate integrated waveguide as a planar circuit is analyzed by this technique. Through comparison with related published literatures, the accuracy of proposed technique is confirmed.