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Detuning and saturation of superconducting devices: formulation and measurements

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hdl:2117/1371

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Collado Gómez, Juan CarlosMés informacióMés informacióMés informació
Mateu Mateu, JordiMés informacióMés informacióMés informació
Booth, James C.
O'Callaghan Castellà, Juan ManuelMés informacióMés informacióMés informació
Document typeConference report
Defense date2007-06
PublisherInstitute of Electrical and Electronics Engineers
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Saturation and detuning of high temperature superconducting (HTS) resonators and filters may occur due to the inherent nonlinear properties of the superconductor. In HTS transmission lines, these nonlinear properties introduce a dependence of the inductance and resistance per unit length on the current through the line and, if the line forms a resonator, this current dependence provokes changes in quality factor and/or resonant frequency with incident power. This paper derives equations for the dependence of the quality factor and resonant frequency of a nonlinear transmission line vs. source power and relates it to the circuit parameters of a nonlinear transmission line. The equations are verified with measurements in a 3.3 GHz YBa2Cu3O7-x (YBCO) coplanar waveguide (CPW) resonator at 76 K and with simulations using harmonic balance
CitationCollado, C.; Mateu, J.; Booth, J. C.; O'Callaghan, J. Detuning and saturation of superconducting devices: formulation and measurements. IEEE MTT-S International Microwave Symposium, 2007. New York: Institute of Electrical and Electronic Engineers, 2007, p. 2023-2026. 
URIhttp://hdl.handle.net/2117/1371
ISSN0149-645X
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  • RF&MW - Grup de Recerca de Sistemes, Dispositius i Materials de RF i Microones - Ponències/Comunicacions de congressos [151]
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