Now showing items 1-12 of 88

    • Dataset reduction for neural network based digital predistorters under strong nonlinearities 

      López Bueno, David; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Open Access
      The artificial neural networks (ANN) are gaining momentum in the digital predistorters (DPD) thanks to their inherently good approximation capabilities. Under strong or complex power amplifier nonlinearities, the size of ...
    • Prediction of the optimal phase shift between control signals in dual-input power amplifiers 

      Guillena Berenguer, Estefanía; Li, Wantao; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Restricted access - publisher's policy
      This paper evaluates the effect of the phase shift between the two control signals in a dual-input load modulated balanced amplifier (LMBA). While the drain efficiency of the LMBA is not significantly affected by the phase ...
    • Fast simulation method of distributed nonlinearities in surface acoustic wave resonators 

      González Rodríguez, Marta; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; González Arbesú, José María; Aigner, Robert; Huebner, Sebatian (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Restricted access - publisher's policy
      Understanding the mechanism of nonlinearity in SAW/BAW devices is growing up in importance because these, even being weak, can cause desensitization of the receivers and limiting their performance. Proper nonlinear distributed ...
    • Nonlinear performance on acoustic transversal filters 

      Perea Robles, Rafael; Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Restricted access - publisher's policy
      The recently proposed transversal topology for creating acoustic filters allows to achieve arbitrary filter responses, in terms of position of transmission zeros and bandwidth, among others. This new topology might indeed ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • Wideband transversal acoustic wave filters. Application to connected cars 

      Perea Robles, Rafael; Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Restricted access - publisher's policy
      This paper presents the synthesis and circuit transformations of acoustic wave filters based on a transversal arrangement of the individual resonators. This configuration allows for the synthesis of any filter response ...
    • Design and digital predistortion linearization of a wideband outphasing amplifier supporting 200 MHz bandwidth 

      Gilabert Pinal, Pere Lluís; Vegas, David; Ren, Zhixiong; Montoro López, Gabriel; Pérez-Cisneros, José Ramón; Ruiz, Nieves; Si, Xiaoshu; García García, José Ángel (2020)
      Conference report
      Open Access
      This paper presents a holistic approach to design and linearize a wideband outphasing power amplifier (PA) to efficiently amplify a 200 MHz bandwidth (BW) signal compliant with the Data Over Cable Service Interface ...
    • Comprehensive nonlinear characterization and modeling of a BAW duplexer 

      Collado Gómez, Juan Carlos; Mateu Mateu, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      This paper performs a comprehensive nonlinear modeling of a Bulk Acoustic Wave (BAW) duplexer operating at the band 7 of the LTE wireless communication standard. The modeling starts by an accurate characterization of the ...
    • Linealización digital de transmisores mediante redes neuronales no lineales 

      López Bueno, David; Pham, Thi Quynh Anh; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (2019)
      Conference report
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      This paper presents an overview on how the artificial neural networks (ANN) are applied to digitally linearize modern transmitters. The use of nonlinear ANNs is intended to either assist or replace the traditional crest ...
    • 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)
      Conference lecture
      Restricted access - publisher's policy
      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 ...
    • Practical issues on the implementation of acoustic transversal filters 

      Mateu Mateu, Jordi; Collado Gómez, Juan Carlos; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Restricted access - publisher's policy
      This paper evaluates important aspect of acoustic filters based on a transversal configuration in order to foreseen the potential and limitations of this new configuration. These aspects are: effects of the losses of the ...
    • Role of SiO2 layers in third-order nonlinear effects of temperature compensated BAW resonators 

      García Pastor, David; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Restricted access - publisher's policy
      This work applies a comprehensive nonlinear characterization process of two Temperature Compensated Bulk Acoustic Wave (TC-BAW) resonators. In both resonators, the SiO 2 layers have a remarkable impact on the generation ...