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The Interpretation and Use of S-Parameters in Lossy Lines



Dylan F. Williams, Roger Marks


Although a fundamental parameter of transmission lines, the characteristic impedance is difficult to measure accurately. We suggest a method by which it may be easily determined from a measurement of the propagation constant. The method is based on a rigorous analysis from· first principles using explicit and realistic approximations which include the effects of imperfect conductors. Results of numerical studies of lossy coaxial lines and of experiments with coplanar waveguides indicate that high accuracy is possible.
Proceedings Title
Tech Dig., Auto. RF Tech. Group Conf.
Conference Dates
November 29-30, 1990
Conference Location
Monterey, CA


Williams, D. and Marks, R. (1990), The Interpretation and Use of S-Parameters in Lossy Lines, Tech Dig., Auto. RF Tech. Group Conf., Monterey, CA, [online], (Accessed April 18, 2024)
Created November 1, 1990, Updated November 10, 2018