A Rigorous Dispersive Characterization of Radiating Coplanar Waveguide Discontinuities and Junctions

A full-wave analysis of coplanar waveguide discontinuities in an open environment using integral equations technique solved by the moment method is described. The analysis includes the effects of both longitudinal and tranverse magnetic current components in the line slots. Radiation and surface wave effects are included in this analysis. Electric field distributions for a coplanar waveguide series stub is presented. Characterization of the discontinuity by a scattering matrix is then accurately evaluated from the determination of the magnefic current distribution along the input and ouput ports surrounding it. The accuracy of our results as a function of transverse discretisation is given. Good agreement of our results with those found in the litterature is obtained.