Power handling capability and intermodulation distortion of high- Tc microwave resonators

The nonlinearity of the microwave properties of coplanar thin-film YBa 2Cu 3O 7− δ resonators are examined by measurements of the degradation of the quality factor Q L and the increase of the two-tone third-order intermodulation distortion signal with increasing microwave power. A linear correlation...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2002-08, Vol.372, p.486-488
Main Authors: Lahl, Peter, Hein, Matthias, Wördenweber, Roger
Format: Article
Language:English
Subjects:
Microwave properties
Power handling capability
Superconductivity
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Summary:The nonlinearity of the microwave properties of coplanar thin-film YBa 2Cu 3O 7− δ resonators are examined by measurements of the degradation of the quality factor Q L and the increase of the two-tone third-order intermodulation distortion signal with increasing microwave power. A linear correlation between the data of the characteristic microwave powers, which are obtained for the degradation of Q L and the intermodulation signal, is experimentally observed and explained in terms of a theoretical model. Due to the experimental observation and the theoretical model, we conclude, that (i) the degradation of the resonator Q factor and the generation of intermodulation distortion are determined by the same physical mechanism and that (ii) thermal effects can most likely be excluded.
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(02)00728-1