A THEORETICAL AND EXPERIMENTAL-STUDY OF COPLANAR WAVE-GUIDE SHUNT STUBS

A comprehensive theoretical and experimental study of straight and ben t coplanar waveguide (CPW) shunt stubs is presented. In the theoretica l analysis, the CPW is assumed to be inside a cavity, while, the exper iments are performed on open structures. For the analysis of CPW disco ntinuities with air-bridges, a hybrid technique has been developed whi ch has been validated through extensive theoretical and experimental c omparisons. Throughout this study, the effect of the cavity resonances on the behavior of the stubs with and without air-bridges is investig ated. In addition, the encountered radiation loss due to the discontin uities is evaluated experimentally.