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Proceedings Paper

Models of superconducting microstrip and coplanar elements for submillimeter applications
Author(s): Pascal Febvre; Corinne Boutez; Sebastien George; Gerard Beaudin
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Paper Abstract

Some models which predict the microwave properties of superconducting microstrip lines, radial stubs, coplanar lines and coplanar waveguides are presented. These models take into account the dispersion which occurs in superconducting lines when the frequency of operation becomes close to the gap frequency of the superconductros (700 GHz for niobium). The effects of fringing fields are also taken into consideration. These models are also valid for high-temperature superconductors. They have been developed in the specific case of elements for which the characteristic dimension (the dielectric thickness for microstrip lines, the spacing between conductors for coplanar elements) is of the same order of magnitude as the typical length of penetration of the magnetic field in the metal. The length of penetration is the skin depth for normal metals and the London penetration depth for superconductors. The consequence of this particular topology is that the propagation of signals in such a transmission line is slow-wave and its microwave properties are modified. These models are also valid for classical line configurations (dielectric thickness much higher than penetration length).

Paper Details

Date Published: 13 October 1995
PDF: 12 pages
Proc. SPIE 2558, Millimeter and Submillimeter Waves II, (13 October 1995); doi: 10.1117/12.224218
Show Author Affiliations
Pascal Febvre, DEMIRM-Observatoire de Paris (France)
Corinne Boutez, DEMIRM-Observatoire de Paris (France)
Sebastien George, DEMIRM-Observatoire de Paris (France)
Gerard Beaudin, DEMIRM-Observatoire de Paris (France)

Published in SPIE Proceedings Vol. 2558:
Millimeter and Submillimeter Waves II
Mohammed N. Afsar, Editor(s)

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