Now showing items 1-20 of 43

  • 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 ...
  • 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)
    Conference report
    Restricted access - publisher's policy
    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 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
    Open Access
    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)
    Conference report
    Restricted access - publisher's policy
    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. ...
  • Analysis of PIFA antenna coupling in nearby traces and reduction with CSRRs in PCB at 2.45 GHz 

    Gil Galí, Ignacio; Fernández García, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Open Access
    The electromagnetic coupling of a conventional planar inverted-F antenna (PIFA) antenna in the nearby layout traces is investigated in the 2.45 GHz industrial, scientific and medical radio band. The impact of a complementary ...
  • Atomic monolayer deposition on the surface of nanotube mechanical resonators 

    Tavernarakis, Alexandros; Chaste, Julien; Eichler, Alexander; Ceballo, Gustavo; Gordillo Bargueño, Maria Carmen; Boronat Medico, Jordi; Bachtold, Adrian (2014-05-14)
    Article
    Open Access
    We study monolayers of noble gas atoms (Xe, Kr, Ar, and Ne) deposited on individual ultraclean suspended nanotubes. For this, we record the resonance frequency of the mechanical motion of the nanotube, since it provides a ...
  • Circuit model for a coplanar-slotline cross 

    Miquel, Ribó; Pradell i Cara, Lluís (2000-12)
    Article
    Open Access
    A new 6-port
  • Circuit model for a coplanar-slotline cross 

    Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-12-31)
    Article
    Open Access
    A new 6-port “circuit-model” for coplanar-slotline crosses is presented. The model is based on the separation of the two fundamental Coplanar Waveguide (CPW) modes (even and odd) into different ports. It generalizes previous ...
  • Circuit model for slotline-to-coplanar waveguide asymmetrical transitions 

    Ribó i Pal, Miquel; Cruz Llopis, Luis Javier de la; Pradell i Cara, Lluís (IEE-INST ELEC ENG, 1999-07-31)
    Article
    Open Access
    A new `circuit-model' for slotline-to-coplanar waveguide asymmetrical transitions is presented and applied to the design of slotline resonators. The model, based on the separation of coplanar-waveguide (CPW) modes into two ...
  • Compact duplexer with miniaturized dual loop resonator 

    Collado Gómez, Juan Carlos; Pozo Vicente, Javier; Mateu Mateu, Jordi; O'Callaghan Castellà, Juan Manuel (Institute of Electrical and Electronics Engineers, 2005)
    Conference report
    Open Access
    This work presents a very compact duplexer based on novel miniaturized loaded-close-loop dual resonators. Two different dual resonators are used to establish the two bands, corresponding to the transmitter and the receiver ...
  • Correction to "Nonlinear Analysis of Disk Resonators: Application to Material Characterization and Filter Design 

    Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-12-31)
    Article
    Open Access
    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 ...
  • Cosimulación electrotérmica de resonadores y filtros para aplicaciones espaciales 

    De Los Santos Viera, Sandino (Universitat Politècnica de Catalunya, 2012-01-21)
    Bachelor thesis
    Open Access
  • Design of tri-Notched UWB antenna based on elliptical and circular ring resonators 

    Ur, Saeed; Cao, Qunsheng; Li, You; Gil Galí, Ignacio; Yi, Wan (2018-12-18)
    Article
    Open Access
    This article presents the design of a compact coplanar waveguide (CPW) fed Monopole Antenna for ultra-wideband (UWB) applications. The semi-circular shaped radiator is fed with a 50-O line that resonates within the UWB ...
  • Enabling silicon-on-silicon photonics with pedestalled Mie resonators 

    Garin Escriva, Moises; Solà, Magdalena; Julian, Anatole Alexandre; Ortega Villasclaras, Pablo Rafael (2018-07-19)
    Article
    Open Access
    High-refractive-index Mie resonators are regarded as promising building blocks for low-loss all-dielectric nanophotonic applications. To avoid the otherwise excessive damping and loss of symmetry such devices typically ...
  • Estudio de un nuevo resonador ultra-compacto con compensación de variaciones en espesor del dieléctrico 

    Fieschi Peyre, Ivan (Universitat Politècnica de Catalunya, 2009-05-22)
    Master thesis (pre-Bologna period)
    Open Access
  • General dynamics of pulsed digital oscillators 

    Domínguez Pumar, Manuel; Pons Nin, Joan; Ricart Campos, Jordi (IEEE, 2008-02-08)
    Article
    Open Access
    The objective of this work is to analyze pulsed digital oscillators (PDOs), as dynamical systems. It is proved that under some conditions, the bitstream at the output of the oscillator is that of the sign of a sampled ...
  • 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
    Open Access
    This 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 ...
  • Maximizing efficiency through impedance matching from a circuit-centric model of non-radiactive resonant wireless power transfer 

    Bou Balust, Elisenda; Sedwick, Raymond; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference lecture
    Restricted access - publisher's policy
    Recent research in wireless power transfer (WPT) using resonant inductive coupling has demonstrated very high efficiencies (above 40%) at large distances compared to the transmitting element dimensions, thereby exponentially ...
  • 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
    Open Access
    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
    Restricted access - publisher's policy
    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 ...