Patent ID: 7532918

Claim:
A superconductive microstrip filter, comprising: an input coupling line, for receiving signals to be filtered and coupling-outputting said signals; a plurality of U-type superconductive microstrip resonators with the same structure and dimension, for performing filtering process for said signals output by said input coupling line to obtain filtered signals in a corresponding frequency band and then coupling-outputting said filtered signals; an output coupling line, for coupling-outputting said filtered signals outputted by said plurality of U-type superconductive microstrip resonators; wherein each of said plurality of U-type superconductive microstrip resonators comprises a superconductive microstrip line bent to a U-type structure having a longer side and a shorter side that are parallel and of different lengths, the superconductive microstrip line having a whole length of half of the wavelength corresponding to the center frequency of said superconductive microstrip filter; wherein said longer sides and said shorter sides of all of said plurality of U-type superconductive microstrip resonators are parallel, and wherein each neighboring pair in said plurality of U-type superconductive microstrip resonators is arranged axisymmetrically, the U-type superconductive microstrip resonators of each of said neighboring pairs having said longer side closer to a symmetrical axis than said shorter side.