Now showing items 1-9 of 9

  • Accuracy considerations in microstrip surface impedance measurements 

    O'Callaghan Castellà, Juan Manuel; Sans, C.; Collado Gómez, Juan Carlos; Canet Grau, Eduard; Pous Andrés, Rafael; Fontcuberta, Josep (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-06-30)
    Article
    Open Access
    An approach is proposed for the design, measurement and data extraction of superconducting microstrip resonators used in determination of surface resistance and penetration depth. Major sources of error are analyzed and ...
  • CEMS and Faraday rotation study of gamma-Fe2O3-Fe3O4 films obtained by a new pyrolisis technique 

    Cusidó Fàbregas, Joan Antoni; Obradors, Xavier; Fontcuberta, Josep; Isalgue Buxeda, Antonio; Canal Bienzobas, Fernando (1987-01-10)
    Article
    Restricted access - publisher's policy
  • Design and fabrication of coplanar YBCO structures on lithium niobate substrates 

    Rozan, Edouard; Collado Gómez, Juan Carlos; García, A.; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fàbrega i Soler, Lluís; Rius Casals, Juan Manuel; Rubí, R.; Fontcuberta, Josep; Harackiewicz, F. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-06-30)
    Article
    Open Access
    YBa2Cu3O7-δ (YBCO) with low RF losses has been successfully deposited onto lithium niobate (LNO) to improve the performance of electrooptic Mach-Zender modulators. Epitaxial, c-axis oriented superconducting YBCO thin films ...
  • Fabrication of melt-textured cylinders and bars of (YBa2Cu3O7-Y2BaCuO5) superconductors 

    Piñol Vidal, Salvador; Yu, R; Vilalta, Nuria; Sandiumenge, Felip; Gomis Arbonès, Vicente; Martínez, Benjamín; Mora Serrano, Javier; Fontcuberta, Josep; Obradors Berenguer, Xavier (1996)
    Conference lecture
    Restricted access - author's decision
    Cylinders and bars of bulk YBa2CuO7-Y2BaCuO5 textured ceramic composites (123-211) have been prepared through different directional solidification processes. Green ceramic preforms for the directional solidification process ...
  • Full wave analysis of the image hybrid dielectric/HTS resonator 

    Sans, C.; O'Callaghan Castellà, Juan Manuel; Sancho, D.; Pous Andrés, Rafael; Fontcuberta, Josep; Liang, Ji-fhu; Liang, Guo-chun (IEEE, 1997-12-31)
    Article
    Open Access
    An analysis of the image hybrid dielectric / high-temperature superconductor (HTS) resonator is carried out. A full-wave radial mode-matching method is used to obtain the electromagnetic fields inside the resonator for ...
  • Full wave modelling of hts dual mode patch filters and staggered coupled-line filters 

    Flores Jiménez, Alejandro; Collado Gómez, Juan Carlos; Sans, C.; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fontcuberta, Josep (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1997-06-30)
    Article
    Open Access
    In order to obtain high-power handling, dual-mode patch HTS filters have been analyzed through Green's function and desegmentation techniques. A precise circuit model has been obtained and applied to the filter design ...
  • Hysteresis motor with self sustained rotor for high speed applications 

    Granados García, Xavier; Márquez, Isabel; Mora Serrano, Javier; Fontcuberta, Josep; Obradors Berenguer, Xavier; Pallarés, J.; Bosch Tous, Ricardo (Institute of Physics (IOP), 1997)
    Conference report
    Open Access
    Pellets of YBCO HTSC have been used to construct a cylindrically shaped rotor. A four poles/four phases stator has been wound in order to build a motor. The motor behaves as an hysteresis motor when it starts and as ...
  • Preparation of top seeded YBa2Cu3O7 large single-domain tiles 

    Yu, R; Gomis Arbonès, Vicente; Piñol Vidal, Salvador; Sandiumenge, Felip; Mora Serrano, Javier; Carrera, Miquel; Fontcuberta, Josep; Obradors Berenguer, Xavier (1997)
    Conference lecture
    Restricted access - author's decision
    Single domain superconductors with diameters up to 40 mm have been prepared by top seeding growth using Nd123 melt textured ceramics as seeds. We show that the use of these seeds is preferred over MgO single crystals to ...
  • Reduced microwave losses YBa[sub 2]Cu[sub 3]O[sub 7 - delta] thin films on electro-optic LiNbO[sub 3] crystals 

    Fàbrega i Soler, Lluís; Rubí, R.; Fontcuberta, Josep; Sánchez, F.; Ferrater Martorell, Cesar; García-Cuenca Varona, Victoria; Varela, M.; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Menéndez Nadal, Óscar; O'Callaghan Castellà, Juan Manuel (AMER INST PHYSICS, 2002-10-31)
    Article
    Open Access
    We report on the growth of epitaxial YBa2Cu3O7 thin films on X-cut LiNbO3 single crystals. The use of double CeO2/YSZ buffer layers allows a single in-plane orientation of YBa2Cu3O7, and results in superior superconducting ...