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Ara es mostren els items 70-89 de 128

    • La prueba piloto de adaptación al EEES en la Escuela Politécnica Superior de Castelldefels 

      Alonso Zárate, Luis Gonzaga; Collado Gómez, Juan Carlos; Hernández Marco, Jordi; Ruiz Boqué, Sílvia; Valero García, Miguel (Universidad Jaume I, 2008)
      Comunicació de congrés
      Accés obert
      La prueba piloto de adaptación al EEES que se ha llevado a cabo en la Escuela Politécnica Superior de Castelldefels entre 2004 y 2007 ha motivado una importante actividad innovadora que nos ha permitido extraer numerosas ...

    • 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
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      Lossy 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 confidencialitat
      The 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 ...

    • Measurements and analysis of microwave nonlinearities in ferroelectric thin film transmission lines 

      Mateu Mateu, Jordi; Booth, James C.; Schima, S. A.; Collado Gómez, Juan Carlos; Seron, David; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers, 2006)
      Text en actes de congrés
      Accés obert
      This work evaluates the microwave nonlinear properties of ferroelectric BaSrTiO thin films by measuring the frequency response of several coplanar transmission lines and interdigital capacitor structures as a function of ...

    • Mechanical tuning of substrate integrated waveguide filters 

      Mira, Fermin; Mateu Mateu, Jordi; Collado Gómez, Juan Carlos (IEEE Microwave Theory and Techniques Society, 2015-12-01)
      Article
      Accés obert
      This paper presents a novel approach for tuning substrate integrated waveguide resonators, realized by placing an additional metallized via-hole on the waveguide cavity. The approach presented here can be applied as a ...

    • Mechanical tuning of substrate integrated waveguide resonators 

      Mira, Fermín; Mateu, Joan; Collado Gómez, Juan Carlos (2012)
      Article
      Accés restringit per política de l'editorial
      This letter presents a novel approach for providing substrate-integrated waveguide tunable resonators by means of placing an additional metalized via-hole on the waveguide cavity. The via-hole contains an open-loop slot ...

    • Method to measure reflection coefficient under CW high-power signals in SAW resonators 

      González Rodríguez, Marta; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; González Arbesú, José María; Huebner, Sebatian; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
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      Improving power handling and lifetime are key assets to ensure device performance and reliability. SAW resonators composed by very thin cross-section inter-digital transducer (IDT) structures make difficult to control the ...

    • Miniaturization of superconducting filters using Hilbert fractal curves 

      Barra Bizinotto, Marilda; O'Callaghan Castellà, Juan Manuel; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-09-30)
      Article
      Accés obert
      This work presents novel compact high-temperature superconductor microstrip resonators and filters based on the Hilbert space-filling fractal curve. Several Hilbert resonator configurations have been assessed by using a ...

    • Modeling superconducting transmission line bends and their impact on nonlinear effects. 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-05-31)
      Article
      Accés obert
      This paper reports on a numerical technique to obtain the current distribution in the annular bent sections of planar layouts. This is used to obtain the linear and nonlinear circuit distributed parameters modeling a ...

    • Modified Mason’s and BVD models for analysis of spurious modes due to ohmic losses in BAW resonators 

      Lugo Hernández, Eduardo; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Mirea, Teona; Carmona Cejas, Jose Manuel; Clement Lorenzo, Marta; Olivares Roza, Jimena (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We study the presence of an additional peak appearing at the series resonance of SMRs due to the resistance of thin metallic electrodes, especially relevant in devices with large area. To properly account for this effect, ...

    • N-Plexer and N-Band acoustic filters based on transversal configuration 

      Perea Robles, Rafael; Mateu Mateu, Jordi; Collado Gómez, Juan Carlos (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This work shows the feasibility of using filters with transversal configuration to create N-Plexers and N-Band responses, by directly connecting several BAW filters in a transversal manner. The new multi-filtering solutions ...

    • New technique to cancel IMD3 in electroacoustic filters 

      González Rodríguez, Marta; Collado Gómez, Juan Carlos; González Arbesú, José María; Mateu Mateu, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This work presents a new technique to cancel third-order intermodulation distortion (IMD3) by using a low frequency injected tone to generate a second-order intermodulation product (IMD2) that fall exactly at the same ...

    • Nonlinear Analysis of Disk Resonators. Application to Material Characteritzation and Filter Design. 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-03-31)
      Article
      Accés obert
      A procedure for the numerical prediction of the microwave nonlinear behavior (intermodulation products, degradation of quality factors, etc.) of TM010 disk resonators has been developed. The procedure is based on relating ...

    • Nonlinear Distortion in a 8-Pole Quasi-Elliptic Bandpass HTS Filter for CDMA System 

      Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Menéndez Nadal, Óscar; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-06-30)
      Article
      Accés obert
      High Temperature Superconductor materials are known to produce intermodulation and other nonlinear effects which may restrict their use in wireless communication systems. Quantifying this degradation is crucial in determining ...

    • Nonlinear distributed model for bulk acoustic wave resonators 

      Collado Gómez, Juan Carlos; Rocas Cantenys, Eduard; Mateu Mateu, Jordi; Padilla Díaz, Alberto; O'Callaghan Castellà, Juan Manuel (2009-12)
      Article
      Accés obert
      This work expands the model proposed by Krimtholz, Leedom, and Matthaei (KLM) model to account for the nonlinear effects occurring in acoustic devices due to the nonlinear stiffened elasticity.We show that a nonlinear ...

    • Nonlinear effects of SiO2 layers in bulk acoustic wave resonators 

      Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; García Pastor, David; Perea Robles, Rafael; Hueltes Escobar, Alberto; Kreuzer, Susanne; Aigner, Robert (IEEE Microwave Theory and Techniques Society, 2018-04)
      Article
      Accés obert
      This paper presents the development of a comprehensive distributed circuit model to account for the existing nonlinear effects in bulk acoustic wave (BAW) resonators. The comprehensiveness of the model and its distributed ...

    • Nonlinear effects of electrode and bragg reflector materials in BAW resonators 

      García Pastor, David; González Rodríguez, Marta; Hueltes Escobar, Alberto; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; González Arbesú, José María; Kreuzer, Susanne; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This work presents a broadband characterization and modeling of the second harmonic nonlinear response in Bulk acoustic wave (BAW) resonators. The proposed circuit model is based on the constitutive equations describing ...

    • Nonlinear Model of Coupled Superconducting Lines 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-06-30)
      Article
      Accés obert
      High Temperature Superconductor materials are known to produce intermodulation and other nonlinear effects. In planar structures, these nonlinearities depend on the field configuration on the strip, which in turn strongly ...

    • Nonlinear performance characterization in an eight-pole quasi-elliptic bandpass filter 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Menéndez Nadal, Óscar; O'Callaghan Castellà, Juan Manuel (IOP PUBLISHING LTD, 2004-05-31)
      Article
      Accés obert
      In this work we predict the nonlinear behaviour of an eight-pole quasi-elliptic bandpass high temperature superconducting (HTS) filter with an equivalent circuit extracted from intermodulation measurements performed at the ...

    • Nonlinear performance of BAW filters including BST capacitors 

      Rocas Cantenys, Eduard; Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Hueltes Escobar, Alberto; Verdú Tirado, Jorge Andrés; Billard, Christophe; David, Jean Baptiste; Reinhardt, Alexandre (2014-04-01)
      Article
      Accés restringit per política de l'editorial
      This paper evaluates the nonlinear effects occurring in a bulk acoustic wave (BAW) filter which includes barium strontium titanate (BST) capacitors to cancel the electrostatic capacitance of the BAW resonators. To do that ...