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Model of high-temperature superconducting coupled microstrip lines on anisotropic sapphire substrate

✍ Scribed by A. Deleniv; M. Gubina; D. Kholodniak; I. Vendik

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 210 KB
Volume: 8
Category: Article
ISSN: 1096-4290
DOI: 10.1002/(sici)1099-047x(199809)8:5<375::aid-mmce4>3.0.co;2-b

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✦ Synopsis

A semiempirical model is proposed for propagation parameters of high-T C ( ) superconducting HTS coupled microstrip lines taking into account anisotropic dielectric permittivity of sapphire substrate and its temperature dependence. The nonhomogeneous current distribution in a cross-section of the lines is considered for attenuation coefficient calculation. The current density distribution in the coupled strips and in the ground plane is found for the even and odd modes. The model is verified by a comparison with full-wave analysis results and experimental investigations of coupled microstrip line HTS resonators.

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## Abstract Simple and correct formulas in regard to frequency dispersion are derived for the calculation of an isotropic effective dielectric constant for the microstrip line on m‐cut sapphire substrate. The formulas were verified by comparison to the results of full‐wave analysis based on the equ