Microwave resonator having a ground conductor partially composed

Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k

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505700, 505701, 333 99S, 333219, H01P 708, H01B 1206

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active

052198278

ABSTRACT:
A microwave resonator includes a ground conductor formed on an under surface of a dielectric layer and a signal conductor formed on an upper surface of the dielectric layer separately so that the signal and ground conductors cooperate to form a microstrip line. The signal conductor has a launching pad portion for receiving a signal, and a resonating conductor portion forming an inductor. The resonating conductor portion is formed separated from the launching pad portion so that a gap between the launching pad portion and the resonating conductor portion forms a capacitor. Thus, the inductor formed by the resonating conductor portion of the signal conductor and the capacitor formed by the gap between the launching pad portion and the resonating conductor portion form a resonator circuit. The resonating conductor portion of the signal conductor and a portion of the ground conductor positionally corresponding to the resonating conductor portion of the signal conductor are formed of a compound oxide superconductor material, and the launching pad portion of the signal conductor and the remaining portion of the ground conductor are formed of a metal which is of a normal conductor.

REFERENCES:
patent: 3857114 (1974-12-01), Minet et al.
McAvoy et al.; "Superconducting Stripline resonator performance"; Proc 1988 Applied Superconductivity Conf.; Aug. 22, 1988.
Valqenzuela et al.; "High Q coplanar transmission line resonator of YBa.sub.2 Cu.sub.3 O.sub.7-x on MgO"; Appl. Phys Lett; vol. 55, No. (10): Sep. 4, 1989; pp. 1029-1031.
DiNardo et al.; "Superconducting Microstrip High-Q Microwave Resonators" Journal of Applied Physics; vol. 43, No. 1; Jan. 1971; pp. 186-189.
J. T. Williams et al., "High frequency characterization of high temperature superconductors". 1989 International Symposium Digest, Antennas and Propagation vol. III, Jun. 26-30, 1989 (IEEE Catalog No. CH2654-Feb. 1989), pp. 1550-1553, San Jose, Calif., U.S.

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