Exploració per autor "O'Callaghan Castellà, Juan Manuel"
Ara es mostren els items 53-72 de 124
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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
Accés obertAn 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 analysis of the image hybrid dielectric/HTS resonator
Sans, C; O'Callaghan Castellà, Juan Manuel; Sancho, D; Pous Andrés, Rafael; Fontcuberta, J; Ji-Fuh, Liang; Guo-Chun, Liang (Institution of Electrical Engineers, 1997-06)
Article
Accés obertAn analysis of the image hybrid dielectric/HTS resonator is carried out. A full-wave radial mode-matching method is used to obtain the electromagnetic fields inside the resonator for single TE01 and dual HE11 modes. The ... -
Full wave modelling of hts dual mode patch filters and staggered coupled-line filters
Flores, A; Collado, C; Sans, C; O'Callaghan Castellà, Juan Manuel; Pous Andrés, Rafael; Fontcuberta, J (1997-06)
Article
Accés obertIn order to obtain high-power hzuidlirig, dual-nlode patch HTS filters have been analyzed through Green’s function rad desegmentation techniques. A precise circuit model has been obtained and applied to the filter design ... -
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
Accés obertIn 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 ... -
General electromagnetic simulation tool to predict the microwave nonlinear response of planar, arbitrarily-shaped HTS structures
Parrón Granados, Josep; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; O'Callaghan Castellà, Juan Manuel (2001-03)
Article
Accés obertThis work describes a simulation tool being developed at UPC to predict the microwave nonlinear behavior of planar superconducting structures with very few restrictions on the geometry of the planar layout. The software ... -
General electromagnetic simulation tool to predict the microwave nonlinear response of planar, arbitrarily-shaped HTS structures
Parrón Granados, Josep; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-03-31)
Article
Accés obertThis work describes a simulation tool being developed at UPC to predict the microwave nonlinear behavior of planar superconducting structures with very few restrictions on the geometry of the planar layout. The software ... -
General Equations for the Induced Phase Shift in Resonant Electro-Optic Modulators
Collado Gómez, Juan Carlos; Menéndez Nadal, Óscar; Santos Blanco, M. Concepción; Mateu Mateu, Jordi; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-02-28)
Article
Accés obertWe derive general equations to calculate the electrooptically induced optical phase shift in resonantly enhanced modulators. The equations are useful in designing modulator electrodes with optimal length and optimal mismatch ... -
Harmonic balance algorithm to model nonlinear effects in HTS filters subject to CDMA signals
Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers, 2003-06)
Text en actes de congrés
Accés obertWe discuss an harmonic balance algorithm to analyze High Temperature Superconducting (HTS) circuits subject to wideband signals, such as the ones used in CDMA wireless systems. Undersampling is used to discretize and ... -
Harmonic balance algorithms for the nonlinear simulation of HTS devices
Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Parrón Granados, Josep; Pons, J.; O'Callaghan Castellà, Juan Manuel; Rius Casals, Juan Manuel (KLUWER ACADEMIC/PLENUM PUBL, 2001-02-28)
Article
Accés obertThis paper describes the application of Harmonic Balance algorithms to predict nonlinear effects in planar High Temperature Superconductors (HTS) microwave circuits. The resulting algorithms are fast and efficient and can ... -
HE-LHC: the High-Energy Large Hadron Collider: Future Circular Collider Conceptual Design Report Volume 4
Abada, A.; Abbrescia, M.; AbdusSalam, S. S.; O'Callaghan Castellà, Juan Manuel; Krkotic, Patrick (Springer, 2019-07-01)
Article
Accés obertIn response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered ... -
High frequency response of thick REBCO coated conductors in the framework of the FCC study
Romanov, Artur; Krkotic, Patrick; Telles, Guilherme; O'Callaghan Castellà, Juan Manuel; Pont, Montse; Pérez, Francis; Granados García, Xavier; Calatroni, Sergio; Puig Molina, Teresa; Gutiérrez Royo, Joffre (Nature, 2020-07-23)
Article
Accés obertA thorough microwave response study of high temperature superconductors, considered as an alternative beam screen coating, has become integral in the design decisions for CERN’s future research infrastructure. Here, we ... -
Hilbert fractal curves for HTS miniaturized filters
Barra Bizinotto, Marilda; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers, 2004)
Text en actes de congrés
Accés obertThis work presents novel compact High Temperature Superconductor (HTS) microstrip resonators based on Hilbert fractal curves. Their miniaturization performance has been investigated, emphasizing the parameters which allow ... -
HTS nonlinearities in microwave disk resonators
Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Shaw, T J; O'Callaghan Castellà, Juan Manuel (2002-08)
Article
Accés obertThis article describes a procedure for the calculation of the intermodulation behavior of the TM010 mode in high temperature superconducting (HTS) disk resonators from a description of the local HTS nonlinearities. Successful ... -
HTS nonlinearities in microwave disk resonators
Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Shaw, Timothy J.; O'Callaghan Castellà, Juan Manuel (ELSEVIER SCIENCE BV, 2002-08-31)
Article
Accés obertThis article describes a procedure for the calculation of the intermodulation behavior of the TM010 mode in high temperature superconducting (HTS) disk resonators from a description of the local HTS nonlinearities. Successful ... -
Ill conditioning loci in noise parameter determination
O'Callaghan Castellà, Juan Manuel; Alegret, A.; Pradell i Cara, Lluís; Corbella Sanahuja, Ignasi (IEE-INST ELEC ENG, 1996-08-01)
Article
Accés obertAn analysis of the problem of noise parameter determination is carried out. It is found that the mathematical problem is ill-posed if all the source reflection coefficients (Γs) used in the measurements fall onto a line, ... -
Ill conditioning loci in noise parameter determination
O'Callaghan Castellà, Juan Manuel; Alegret Ginesta, Alexandre; Pradell i Cara, Lluís; Corbella Sanahuja, Ignasi (IEE-INST ELEC ENG, 1996-08-01)
Article
Accés obertAn analysis of the problem of noise parameter determination is carried out. It is found that the mathematical problem is ill-posed if all the source reflection coefficients (Γs) used in the measurements fall onto a line, ... -
Intermodulation distortion in coupled-resonator filters with nonuniformly distributed nonlinear properties - Use in HTS IMD compensation.
Mateu Mateu, Jordi; Booth, James C.; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-04-30)
Article
Accés obertWe present a general procedure for calculating intermodulation distortion in coupled-resonator filters that allows one to predict the performance of a nonlinear filter as a function of the general nodal matrix defining the ... -
Introduction to special issue of the proceedings of the 8th Symposium on High Temperature Superconductors in High Frequency Fields
Kokabi, Hamid; O'Callaghan Castellà, Juan Manuel (Springer New York LLC, 2006-11-30)
Article
Accés obert -
Lossy filter synthesis of L-band planar filters using novel software
Padilla Díaz, Alberto; Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Rocas Cantenys, Eduard; Ernst, Cristoph; Rius Casals, Juan Manuel; Tamayo Palau, José María; O'Callaghan Castellà, Juan Manuel (2011)
Text en actes de congrés
Accés restringit per política de l'editorialLossy synthesis techniques are used to synthesize high performance filters using resonators with a finite Q. With these techniques a transmission response of a lossless filter with lowest possible roll-off is obtained, ... -
LossyFilters
Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Rius Casals, Juan Manuel; O'Callaghan Castellà, Juan Manuel (2013-06-11)
Programari
Accés restringit per acord de confidencialitatThe LossyFilters software package has been written to synthesize filters following various forms of classical (no-loss considered in the synthesis), pre-distortion and prescribed insertion loss synthesis. This software ...