Measuring Changes in Inductance With Microstrip Resonators

We measure the frequency dependence of a niobium microstrip resonator as a function of temperature from 1.4 to 8.4 K. In a 2-micrometer-wide half-wave resonator, we find the frequency of resonance changes by a factor of 7 over this temperature range. From the resonant frequencies, we extract inducta...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2019-08, Vol.29 (5), p.1-4
Main Authors: Lewis, Rupert M., Henry, Michael David, Young, Travis R., Frank, Michael P., Wolak, Matthaus A., Missert, Nancy
Format: Article
Language:English
Subjects:
Circuits
Dependence
Electronic circuits
ENGINEERING
Group velocity
Impedance
Inductance
Josephson junctions
kinetic inductance
Microstrip
Niobium
OTHER INSTRUMENTATION
Propagation velocity
Resonant frequencies
Resonant frequency
Resonators
superconducting electronics
Superconducting materials
superconducting resonators
Superconductivity
Temperature
Temperature measurement
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Description
Summary:We measure the frequency dependence of a niobium microstrip resonator as a function of temperature from 1.4 to 8.4 K. In a 2-micrometer-wide half-wave resonator, we find the frequency of resonance changes by a factor of 7 over this temperature range. From the resonant frequencies, we extract inductance per unit length, characteristic impedance, and propagation velocity (group velocity). We discuss how these results relate to superconducting electronics. Over the 2 K to 6 K temperature range where superconducting electronic circuits operate, inductance shows a 19% change and both impedance and propagation velocity show an 11% change.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2019.2899867