A cryogenic post dielectric resonator for precise microwave characterization of planar dielectric materials for superconducting circuits
Journal Publication ResearchOnline@JCUAbstract
A novel dielectric resonator operating at cryogenic temperatures (14–85 K) at a frequency of 10 GHz for measurements of permittivity and loss tangent of dielectric substrates for HTS microwave circuits is presented. We have fabricated a prototype post dielectric resonator, with superconducting (DyBa2Cu3O7) end plates and silver-plated copper sidewalls to improve the sensitivity and resolution of loss tangent measurements. Also a numerical technique for calculations of permittivity and loss tangent from the resonant frequency and the Q-factor is presented in the paper. For verification of the technique, measurements of the real part of the permittivity of a single crystal quartz substrate have been performed and a very good agreement with published data using the whispering gallery mode technique has been obtained.
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Volume
17
ISBN/ISSN
1361-6668
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Issue
3
Pages Count
5
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Publisher
IOP Publishing
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Publisher Location
Bristol, United Kingdom
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EISSN
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DOI
10.1088/0953-2048/17/3/012