Microwave surface resistance measurement technique for cylindrical high-Tc superconductor

A surface-resistance measurement method using an open-circuit terminated cavity constructed from a shielded pair of cylindrical conductors is described. The validity of this technique was confirmed by an experiment with copper specimens from 1 to 8 GHz. The measured and theoretical values of the copper specimens were within 10% of each other. In addition, the microwave surface resistance of the bulk YBaCuO superconductors from various sources was evaluated from 1 to 8 GHz at 77 K.<
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