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Dielectric property measurement system at cryogenic temperature and microwave frequencies

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5 Author(s)
Molla, J. ; Euratom-Ciemat Assoc., Madrid, Spain ; Ibarra, Angel ; Margineda, J. ; Zamarro, J.M.
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A system based on the resonant cavity method has been developed to measure the permittivity and loss tangent at 12-18 GHz over the temperature range 80-300 K. Changes of permittivity as low as 0.01% in the range 1-30, 3x10-6 for loss tangent values below 10-2, can be measured without requiring temperature stability. The thermal expansion coefficient and resistivity factor of copper have been measured between 80 K and 300 K. The permittivity of sapphire and loss tangent of alumina of 99.9% purity in the same temperature range are presented

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Instrumentation and Measurement, IEEE Transactions on  (Volume:42 ,  Issue: 4 )