Patent ID: 6370404
Filing Date: 2002-04-09
Classification: H01P,Y10S

Abstract:
A high temperature superconductor mini-filter comprising:(a) a substrate having a front side and a back side; (b) at least two self-resonant spiral resonators in intimate contact with the front side of the substrate, each of said resonators independently comprising a high temperature superconductor line oriented in a spiral fashion (i) such that adjacent lines are spaced from each other by a gap distance which is less than the line width; and (ii) so as to form a central opening within the spiral, the dimensions of which are approximately equal to the gap distance; (c) at least one inter-resonator coupling; (d) an input coupling circuit comprising a transmission line with a first end connected to an input connector of the filter and a second end coupled to a first one of the at least two self-resonant spiral resonators; (e) an output coupling circuit comprising a transmission line with a first end connected to an output connector of the filter and a second end coupled to a last one of the at least two self-resonant spiral resonators; (f) a blank high temperature superconductor film disposed on the back side of the substrate as a ground plane; and (g) a film disposed on the blank high temperature superconductor film as the contact to a case for said mini-filter.