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Detuning and saturation of superconducting devices: formulation and measurements
Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Booth, James C.; O'Callaghan Castellà, Juan Manuel
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. RF&MW - Grup de Recerca de sistemes, dispositius i materials de RF i microones
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
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Circuits de microones, radiofreqüència i ones mil·limètriques
Electric lines Superconducting
Electronic apparatus and appliances
Detuning
HTS
Nonlinear transmission line
Saturation
Superconductor
Superconducting resonator
Superconductors
Dispositius electrònics
info:eu-repo/semantics/conferenceObject
Institute of Electrical and Electronics Engineers
         

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