Enviaments recents

  • Novel formulation of coefficients of low-pass prototype filter for the design of fourelement planar filtering antenna array 

    Kufa, Martin; Raida, Zbynek; Mateu Mateu, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper is focused on a formulation of a new coefficient of the low-pass prototype filter for the design of a four-element filtering antenna array. Due to the new gicoefficients, we can comfortably and easily control a ...
  • Sistema en banda X para la reconstrucción de imágenes 

    Jofre Roca, Lluís; Ferrando Bataller, Miquel; de los Reyes, Elías; Berenguer Sau, Jordi; Sorolla, M. (1984)
    Text en actes de congrés
    Accés obert
    This paper describes the theoretical study and experimental set-up for a quasi-real-time active microwave imaging system in band- X. The main contributions are related to the spectral algoritms for the reconstruction ...
  • Multiplicador de frecuencias PLL con detector de fase armónico 

    Berenguer Sau, Jordi; Comerón Tejero, Adolfo (Unión Científica Internacional de Radio (URSI), 1986)
    Text en actes de congrés
    Accés obert
    An indirect synthesis frequency multiplier at microwave frequencies is presented. A microstrip balanced mixer implemented with a 90 hybrid is used as phase detector, to compare directly phases of signals at 9 and 27 GHz. ...
  • Digital predistortion of envelope tracking amplifiers driven by slew-rate limited envelopes 

    Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Berenguer Sau, Jordi; Bertran Albertí, Eduardo (IEEE Microwave Theory and Techniques Society, 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents a new Digital Predistorter (DPD) to compensate for nonlinear distortion that arises in Envelope Tracking (ET) Power Amplifiers (PAs) driven by slew-rate limited versions of the real signal's envelope. ...
  • PLL de microondas con tiempo de adquisición reducido 

    Berenguer Sau, Jordi; Artal, E.; Corbella Sanahuja, Ignasi; Comerón Tejero, Adolfo (1986)
    Text en actes de congrés
    Accés obert
    The behaviour of a PLL where the VCO is injection-locked to the reference frequency is studied. It is experimentally shown that the phase acquisition time can be reduced relative to the non-injection locked VCO situation. ...
  • Simulation studies of optimal decentralized load-frequency regulators 

    Bertran Albertí, Eduardo; Herranz, J.; Munilla, I. (International Federation of Automatic Control (IFAC), 1986)
    Text en actes de congrés
    Accés obert
    On appliying the theory of the Optimal Decentralized Regulator (ODR) to the control of an Electric Power System (EPS), due attention has not been paid to some aspects such as the importance of the design model structure, ...
  • On the use of state-feedback in the design of elementary switching regulators 

    Bertran Albertí, Eduardo; Martínez Barrios, Luis; Poveda López, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 1987)
    Text en actes de congrés
    Accés obert
    The dc-to-dc buck switching converter is modelled by means of the State-Space Averaging Method and techniques of Modern Control Theory are applied to obtain a class of state-feedback control laws. Three different strategies ...
  • Multiplicadores de frecuencia para receptores coherentes de microondas 

    Corbella Sanahuja, Ignasi; Berenguer Sau, Jordi; Pradell i Cara, Lluís; Comerón Tejero, Adolfo; Bará, J; Artal, E (1986)
    Text en actes de congrés
    Accés obert
    The design of frequency multipliers using PLL techniques is presented in this article. The theory is dicussed and also experimental results of a x43 frequency multiplier with an output frequency of 11.4 GHz in wich excellent ...
  • PLL de microondas con tiempo de adquisición reducido 

    Berenguer Sau, Jordi; Artal, E.; Corbella Sanahuja, Ignasi; Comerón Tejero, Adolfo (1986)
    Text en actes de congrés
    Accés obert
    The behaviour of a PLL where the VCO is injection-locked to the reference frequency is studied. It is experimentally shown that the phase acquisition time can be reduced relative to the non-injection locked VCO situation. ...
  • Identificación paramétrica del sistema de regulación de tensión en centrales hidroeléctricas. "Case Study" 

    Munilla, I.; Bertran Albertí, Eduardo; Herranz, J. (1984)
    Comunicació de congrés
    Accés obert
    Se describen una serie de experiencias y trabajos de simulación, encaminados a la identificación paramétrica del sistema de excitación de un grupo de alternadores. El modelo escogido es uno de los propuestos por el

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