A New Design of a Broadband Microwave Test Fixture for Odd Mode Excitation in Monolithic Coplanar Coupled Strips

In this paper, we present the design and performances of a precision microwave test fixture suitable for odd mode excitation in both monolithic and coplanar coupled strips (CPS). The proposed test fixture is based on a new type of a broadband coaxial-to-CPS transition. The test fixture was used to measure the Sij parameters of a GaAs monolithic CPS in the 2-18 GHz frequency range. Some time domain reflectometry results are presented.