Compact Superconducting Dual-Log Spiral Resonator with High Q-Factor and Low Power Dependence.
Publication date
2002Keyword
Quaternary compoundCopper oxide
Barium oxide
Yttrium oxide
Experimental study
Resonance frequency
Insertion loss
Current density
Logarithmic function
Low-power electronics
Spiral shape
High temperature superconductor
Superconducting thin films
Superconducting microwave devices
Superconducting resonator
High Q factor
Peer-Reviewed
YesOpen Access status
closedAccess
Metadata
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A new dual-log spiral geometry is proposed for microstrip resonators, offering substantial advantages in performance and size reduction at subgigahertz frequencies when realized in superconducting materials. The spiral is logarithmic in line spacing and width such that the width of the spiral line increases smoothly with the increase of the current density, reaching its maximum where the current density is maximum (in its center for ¿/2 resonators). Preliminary results of such a logarithmic ten-turn (2 × 5 turns) spiral, realized with double-sided YBCO thin film, showed a Q.-factor seven times higher than that of a single ten-turn uniform spiral made of YBCO thin film and 64 times higher than a copper counterpart. The insertion loss of the YBCO dual log-spiral has a high degree of independence of the input power in comparison with a uniform Archimedian spiral, increasing by only 2.5% for a 30-dBm increase of the input power, compared with nearly 31% for the uniform spiral. A simple approximate method, developed for prediction of the resonant frequency of the new resonators, shows a good agreement with the test results.Version
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Excell, P.S. and Hejazi, Z.M.(2002) Compact Superconducting Dual-Log Spiral Resonator with High Q-Factor and Low Power Dependence. IEEE Transactions on Applied Superconductivity. Vol. 12, No. 2, pp. 1813-1817.Link to Version of Record
https://doi.org/10.1109/TASC.2002.1020342Type
Articleae974a485f413a2113503eed53cd6c53
https://doi.org/10.1109/TASC.2002.1020342