CAD Models of Connectors and Transitions used in Hybrid Microwave Integrated Circuits

Recently proposed resonance measurement based method of microwave transition characterisation has been employed when developing CAD models of transitions from coaxial connectors to different planar transmission lines. The considered cases include millimetric-wave connector - microstrip transition, SMA connector - symmetrical stripline transition and in-house developed SAM connectors for direct feeding of coplanar waveguide circuits. Equivalent circuits of transitions have been obtained and experimentally validated Examples of application include the improvement of millimetric-wave transition performance and an approach used in the design and calibration of a fixture for characterisation of devices mounted in coplanar waveguide.