Narrow-Band 1 0-Pole Y-Ba-Cu-0 Filter on Sapphire Substrate

D-7602 I Karlsrulie. (icriiiaiiy (e-inail. Al~x;iiidcr.%act sev~~~~i~~~.~~k. ~l~) design of these structures [4, 51. A presumable explanation of this situation is a complicated simulation of the filter performance, which should take into account the anisotropy of sapphire dielectric permittivity. Most of commercial software does not take into consideration the anisotropy of the substrate and the HI'S film contribution in the filter characteristics. We derived an effective CAD tool, which allowed a careful simulation of HTS planar structures on sapphire substrate [6]. In this paper, we present the results of joint efforts of manufacturing and investigations of the planar Y BCO resonators and bandpass filters on sapphire substrate.

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