The analysis of conformal microstrip couplers with the GSDMM-method

The analysis of conformal contra-directional microstrip couplers is presented. To derive the coupling parameters, we have calculated the even- and odd-mode line impedance using the GSDMM-method (General-Solution Discrete Mode Matching) with one-dimensional discretization. A common microstrip coupler is used to demonstrate the influence of the surface shape on the coupling parameters. The different features of convex and concave shaped couplers are shown.