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Proceedings Paper

Shielded and open two-layer superconducting microstrip lines
Author(s): Humberto Cesar Chaves Fernandes; Osvaldo SÚrgio Del da Costa; Idalmir de Souza Queiroz
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Paper Abstract

The full wave analysis in the spectral domain of the Transverse Transmission Line (TTL) is used in the analysis of the shielded and open two layers microstrip lines considering the superconductor strip and semiconductor substrate. The superconductor effect is included with the boundary condition of the surface impedance that is calculated from an advanced two-fluid model. Considering that the thickness of the strip is more thin than the penetration depth, the surface current and the fields within the strip are approximately uniforms. For a substrate with high permitivity, the density of current will be practically equal to current in the bottom of the strip. Applying the Moment method is obtained the homogeneous matrix system, and the complex root of the characteristic matrix is the complex propagation constant of the structure, including the phase constant and the attenuation constant. Results are presented for the complex propagation constant, of the shielded and open two layers superconducting microstrip lines versus the frequency and the temperature, where the effects of the material superconductor are shown.

Paper Details

Date Published: 1 September 1995
PDF: 8 pages
Proc. SPIE 2559, High-Temperature Microwave Superconductors and Applications, (1 September 1995); doi: 10.1117/12.218174
Show Author Affiliations
Humberto Cesar Chaves Fernandes, Federal Univ. of Rio Grande do Norte (Brazil)
Osvaldo SÚrgio Del da Costa, Federal Univ. of Rio Grande do Norte (Brazil)
Idalmir de Souza Queiroz, Federal Univ. of Rio Grande do Norte (Brazil)

Published in SPIE Proceedings Vol. 2559:
High-Temperature Microwave Superconductors and Applications
James D. Hodge, Editor(s)

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