HIGH-QUALITY CIRCUIT OF HIGH-FREQUENCY BAND Russian patent published in 2001 - IPC

FIELD: radio engineering; high-quality filters and resonators. SUBSTANCE: high-quality tunable circuit built around high-temperature superconductors has two insulating plates whose surfaces facing one another mount deposited planar spirals and capacitor pads made of high- temperature superconductors, input and output coupling members inductively coupled with planar spirals which are identical and coiled in opposite direction. Insulating plates are mounted for varying their relative position. Input and output coupling members are made in the form of inductive loops arranged for longitudinal and crosswise displacement relative to planar spirals. EFFECT: improved quality of tunable circuit enabling its operation in high-frequency band. 7 cl, 6 dwg