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We report the first measurements of picosecond pulse propagation on transmission lines patterned from YBa2Cu3O7−x films. Distortion-free propagation of high current density transients is demonstrated. The high-frequency properties were analyzed by careful study of the relative phase delays of the electrical transients as the temperature of the sample was varied from 1.8 K to Tc. Simulations using Mattis–Bardeen complex conductivities showed good agreement with the measured results. High-frequency critical current densities in excess of 105 A/cm2 were measured.
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Dykaar et al. (1988) studied this question.
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