Ara es mostren els items 1-20 de 127

    • A consistent methodology to characterize BAW resonators 

      Rocas Cantenys, Eduard; Collado Gómez, Juan Carlos; Aigner, Robert; Mateu Mateu, Jordi; Hueltes Escobar, Alberto; Booth, James C. (2012)
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      We present a methodology to characterize BAW resonators both linearly and nonlinearly. The procedure uses physical modeling along with measurements that exploit different manifestations of the nonlinear phenomena to ...
    • A general approach for the calculation of intermodulation distortion in cavities with superconducting endplates 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Menéndez Nadal, Óscar; O'Callaghan Castellà, Juan Manuel (AMER INST PHYSICS, 2003-01-31)
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      We report on a general procedure to calculate intermodulation distortion in cavities with superconducting endplates that is applicable to the dielectric-loaded cavities currently used for measurement of surface resistance ...
    • A General approach for the calculation of intermodulation distortion in cavities with superconducting endplates 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Menéndez, O; O'Callaghan Castellà, Juan Manuel (2003-01)
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      We report on a general procedure to calculate intermodulation distortion in cavities with superconducting endplates that is applicable to the dielectric-loaded cavities currently used for measurement of surface resistance ...
    • A 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)
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      This 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 ...
    • A lateral modes model for BAW resonators 

      Collado Gómez, Juan Carlos; Rocas Cantenys, Eduard; Verdú, Jordi; Mateu Mateu, Jordi; Hueltes Escobar, Alberto; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      An equivalent circuit model to predict lateral modes occurring in real BAW resonators is proposed. The circuit model has been validated with FEM simulations of FBAR resonators and also with measurements of SMR resonators. ...
    • A thickness-shear MEMS resonator employing electromechanical transduction through a coplanar waveguide 

      Johnson, W.L.; Wallis, T.M.; Kabos, P.; Rocas Cantenys, Eduard; Collado Gómez, Juan Carlos; Liew, L.A.; Ha, J.Y.; Davydov, A.V.; Plankis, A.; Heyliger, P.R. (2012)
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      The design, modeling, fabrication, and characterization of a vibrationally trapped thickness-shear MEMS resonator is presented. This device is intended to avoid various limitations of flexural MEMS resonators, including ...
    • Absorptive limiter for frequency-selective circuits 

      Collado Gómez, Juan Carlos; Hueltes Escobar, Alberto; Rocas Cantenys, Eduard; Mateu Mateu, Jordi; Booth, James C.; O'Callaghan Castellà, Juan Manuel; Verdú Tirado, Jorge Andrés (2014-06-01)
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      This letter describes a novel absorptive limiter for frequency-selective circuits. The proposed circuit allows the design of absorptive limiters based on a bi-state phase shifter, which is appropriate for integration into ...
    • 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)
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      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 ...
    • Accuracy considerations in surface impedance measurements 

      O'Callaghan Castellà, Juan Manuel; Sans, C; Pous Andrés, Rafael; Collado Gómez, Juan Carlos; Canet, E (1997-06)
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      Accés obert
      An approach is proposied 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 ...
    • Acoustic wave filters for enhanced performance 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Hueltes Escobar, Alberto; Perea Robles, Rafael; Aigner, Robert; Khlat, Nadim (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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      This paper presents a novel filter configuration based on acoustic wave resonators that allows to obtain filter responses unachievable with the well established ladder configuration, such as arbitrary position of transmission ...
    • Acoustic wave transversal filter for 5G N77 band 

      Mateu Mateu, Jordi; Yusuf, Yazid; Perea Robles, Rafael; Collado Gómez, Juan Carlos; Gimenez, Alfred; Martín Iglesias, Petronilo; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2021-10-01)
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      This work presents the complete synthesis procedure and circuit transformations needed to go from the characteristic polynomials to the transversal network formed by electroacoustic resonators. This filter topology allows ...
    • An equivalent model for lateral modes on the H2 response of bulk acoustic wave resonators 

      Udaondo Guerrero, Carlos; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; García Pastor, David (Institute of Electrical and Electronics Engineers (IEEE), 2020)
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      An equivalent circuital model is proposed for the lateral modes of a BAW resonator. It is based in the Mason model, adding a dispersive a transmission line to model the Lamb waves along the lateral dimensions of the ...
    • An experimental study of multi-radio platform coexistence in the 5 GHz band for railway applications 

      Vlad, Adrián; Hierro, José; González, Jesús; Martinez, R.; Navarro, Isabel; Higuera Portilla, Jorge Eduardo; Kartsakli, Elli; Collado Gómez, Juan Carlos; González Arbesú, José María; Alonso Zárate, Luis Gonzaga; Valenzuela González, José Luis; Laya Romero, Andrés Ernesto; Flores, Enrique (Springer Verlag, 2011)
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      This paper studies the practical challenges that arise due to the coexistence of two wireless technologies, both operating in the license-exempt 5 GHz band. In particular, WiFi and WiMAX equipment have been used in the ...
    • Analysis and Simulation of Distributed Nonlinearities in Ferroelectrics and superconductors for Microwave Applications 

      Seron, David; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-03-31)
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      This paper gives closed-form equations for the intermodulation and third harmonic signals generated in a nonlinear transmission line with distributed quadratic nonlinearities in the conductor and dielectric. Although the ...
    • Analysis and Simulation of the Effects of Distributed Nonlinearities in Microwave Superconducting Devices 

      Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-03-31)
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      This paper presents a comprehensive study of microwave nonlinearities in superconductors, with an emphasis on intermodulation distortion and third-harmonic generation. It contains the analysis of various resonant and ...
    • Analysis of border ring modes on SMR-BAW resonators 

      Udaondo Guerrero, Carlos; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2019)
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      An equivalent circuit model is proposed in order to model the Border Ring (BR) spurious modes on Type I Solidly Mounted Resonators (SMR) BAW resonators and the cancellation of the in-band lateral modes that the BR frame ...
    • Analysis of dielectric-loaded cavities for characterization of the nonlinear properties of high temperature superconductors 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Menéndez Nadal, Óscar; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-06-30)
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      This work describes and compares two alternative methods of analyzing dielectric-loaded cavities for measurement of intermodulation distortion in HTS films. One of them is based on assuming a specific type of HTS nonlinearities ...
    • Analysis of spurious peaks at series resonance in solidly mounted resonators by combined BVD-Mason modelling 

      Lugo Hernández, Eduardo; Mirea, Teona; Carmona Cejas, Jose Manuel; Clement Lorenzo, Marta; Olivares Roza, Jimena; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi (2023-05)
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      Solidly Mounted Resonators (SMRs) for high frequency RF filters and sensing applications often display spurious resonances that distort their frequency response. In this work, we try to identify the origin of spurious ...
    • Analytical modeling method of thermal spreading resistance in BAW filters 

      González Rodríguez, Marta; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; González Arbesú, José María; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2019)
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      As the power requirements in BAW filters steadily increase, thermal behaviour emerges as a key asset to ensure device performance and reliability. Under these conditions, self-heating mechanisms drive to possible situations ...
    • Application of the input-output equivalent sources method for the simulation of nonlinearities in TC-SAW resonators and filters 

      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), 2022)
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      A good understanding of the nonlinearity mechanism in SAW devices is a crucial aspect in the filter stage. Nonlinear intermodulation distortion (IMD) may lead to spurious signals falling into the receiver band and limiting ...