Measurement of transmission lines in the GHz region

In the general GHz measurement method, characteristics of signal transmission lines have been obtained through high-speed connecters to high-speed coaxial cables. However, measured data often did not accurately reflect actual circuit performance. This study aims to show the effect of the connection methods over 10Gbps. Teflon-based micro-strip line 200mm in length was chosen for its improved transmission characteristics to extract a connection effect using four different connectors and a Cascade Microtech prober. Simulation is also supported according to the experimental data. The results of the experiment show that the de-embedded operation by a blank calibration must be done to eliminate the connector effect in all connection methods with data rates over 10Gbps. However arrangement of the blank calibration needs careful thought to design. In this study, a smarter blank calibration method was attempted with more exact de-embedding.