Referenced Items are not available for this document.
We have measured the quality factors and phase noise of niobium and tantalum coplanar waveguide microwave resonators on silicon. The results of both materials are similar. We reach quality factors up to 105. At low temperatures the quality factors show an anomalous increase, while the resonance frequency remains constant for increasing power levels. The resonance frequency starts to decrease at temperatures around a tenth of the critical temperature. The phase noise exhibits a 1/f like slope. We attribute this behavior to the silicon dielectric.
Published in:
Applied Superconductivity, IEEE Transactions on
(Volume:17
,
Issue:
2
)
Date of Publication: June 2007
- Page(s):
- 263 - 266
- ISSN :
- 1051-8223
- INSPEC Accession Number:
- 9613086
- Digital Object Identifier :
- 10.1109/TASC.2007.898541
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 23 July 2007
- Issue Date :
- June 2007
- Sponsored by :
- The IEEE Council on Superconductivity
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