Cross talk studies for superconducting transmission lines

The authors describe the analysis of crosstalk on high-T/sub c/ superconducting transmission lines from the viewpoint of interconnection technology. They fabricated YBCO microstrip transmission lines on MgO substrate by sputtering and then measured the crosstalk by applying a high-speed pulse to the one line. They also calculated the current distributions in the YBCO superconductors and ground plane to evaluate the mutual inductance of the lines. After determining the circuit parameters of superconducting transmission lines based on the two-fluid model, they investigated by simulation how an induced pulse on the neighboring line propagates on the line. These simulation results show that the crosstalk on the superconducting transmission lines is smaller than that on the normal-conductor transmission lines owing to smaller mutual inductance of superconducting lines. These simulation results agree well with the experimental results.<>