Electrical Conductivity Measurement Through the Loaded Q Factor of a Resonant Cavity |
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Authors: | Joaquim J Barroso Pedro J Castro Joaquim P Leite Neto |
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Affiliation: | 1. Associated Plasma Laboratory, National Institute for Space Research, P.O. Box 515, S.J. Campos, 12245-970 SP, Brazil
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Abstract: | We present a method for measuring the electrical conductivity of metallic materials that relies on the ratio of two loaded Q factors, QR/QX, with QR corresponding to a TE011-mode reference cavity made of aluminum, and QX the Q that results upon replacing the aluminum plate with the one fabricated from the material to be examined. Electrical conductivity is mathematically inferred from the ratio QR/QX where the loaded Q factors are measured by using the transmission-type method. Within a 3.0 percent accuracy, conductivities determined at 8.7 GHz for electrolytic copper (5.6 times 107 S/m) and brass (1.6 times 107 S/m) show to be in good agreement with those reported in the literature. |
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