Microwave nonlinear resonance incorporating the helium heating effect in superconducting microstrip resonators

Nonlinear microwave phenomena in superconducting niobium–teflon microstrip resonators cooled by liquid helium are studied. Helium heating caused by the losses of microwave power in superconductor changes the resonant frequency because of the temperature dependence of helium permittivity. Manifestati...

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Bibliographic Details
Published inPhysica. C, Superconductivity Vol. 408; pp. 739 - 740
Main Authors Karuzskii, A.L., Lykov, A.N., Perestoronin, A.V., Golovashkin, A.I.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.08.2004
Subjects
Helium
Microwave
Nonlinearity
Phase transition
Superconductor
Thermal instability
Superconductor
Microwave
Thermal instability
Nonlinearity
Helium
Phase transition
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Summary:Nonlinear microwave phenomena in superconducting niobium–teflon microstrip resonators cooled by liquid helium are studied. Helium heating caused by the losses of microwave power in superconductor changes the resonant frequency because of the temperature dependence of helium permittivity. Manifestations of this thermal instability discover a new type of nonlinear phenomena including the generation of the monochromatic microwave pulses, generation of acoustic signals. The found nonlinear resonances are explained by thermally induced variations of the helium dielectric permittivity caused by the microwave power dissipated in superconductor, which enable incorporating the jump nonlinearity of a liquid–vapour phase transition in helium.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2004.03.072