Now showing items 1-20 of 51

    • A compact Thévenin model for a rectenna and its application to an RF harvester with MPPT 

      Gasulla Forner, Manuel; Ripoll Vercellone, Edgar; Reverter Cubarsí, Ferran (Multidisciplinary Digital Publishing Institute (MDPI), 2019-04-06)
      Article
      Open Access
      This paper proposes a compact Thévenin model for a rectenna. This model is then applied to design a high-efficiency radio frequency harvester with a maximum power point tracker (MPPT). The rectenna under study consists of ...
    • A contactless capacitive angular-position sensor 

      Gasulla Forner, Manuel; Li, Xiujun; Meijer, Gerard C. M.; Van der Ham, Lucas; Spronck, Jo W. (Institute of Electrical and Electronics Engineers, 2003-10)
      Article
      Open Access
      This paper presents an absolute capacitive angular-position sensor with a contactless rotor. The sensor is mainly composed of three parts: the capacitive sensing element, a signal processor, and a microcontroller. The ...
    • A high-efficiency matching technique for low power levels in RF harvesting 

      Anchustegui Echearte, Iker; Jimenez Lopez, David; Gasulla Forner, Manuel; Giuppi, Francesco; Georgiadis, Apostolos (The Electromagnetics Academy, 2013)
      Conference report
      Open Access
      Radiofrequency (RF) energy can be harvested in order to power autonomous sensors either from the surrounding environment or from dedicated sources. A conventional RF harvester is mainly composed by an antenna, a matching ...
    • A High-Efficiency RF Harvester with Maximum Power Point Tracking 

      Gasulla Forner, Manuel; Robert Sanxis, Francesc Josep; Jordana Barnils, José; Ripoll Vercellone, Edgar; Berenguer Sau, Jordi; Reverter Cubarsí, Ferran (Multidisciplinary Digital Publishing Institute (MDPI), 2018)
      Conference report
      Open Access
      This paper presents the implementation of a high-efficiency radiofrequency (RF) harvester, which consists of a rectenna and a maximum power point tracker (MPPT). The rectenna was characterized from -30 dBm to -10 dBm at ...
    • A high-speed capacitive-sensor interface using a relaxation oscillator and a fast counter 

      Gasulla Forner, Manuel; Li, Xiujun; Meijer, Gerard C. M. (Institute of Electrical and Electronics Engineers, 2003-05)
      Conference report
      Open Access
      This paper presents the analysis and experimental results on the jitter of a capacitive-sensor interface. The interface is implemented with a simple relaxation oscillator, a fast counter and a microcontroller. The goal ...
    • A new MPPT method for low-power solar energy harvesting 

      López Lapeña, Oscar; Penella López, María Teresa; Gasulla Forner, Manuel (2010-09)
      Article
      Open Access
      This paper describes a new maximum-power-pointtracking (MPPT) method focused on low-power (< 1 W) photovoltaic (PV) panels. The static and dynamic performance is theoretically analyzed, and design criteria are provided. ...
    • A review of commercial energy harvesters for autonomous sensors 

      Penella López, María Teresa; Gasulla Forner, Manuel (2007-05-01)
      Conference report
      Open Access
      Current commercial autonomous sensors are mainly powered by primary batteries. Batteries need to be replaced and hence can become the largest and most expensive part of the system. On the other hand, our environment is ...
    • A simple and efficient MPPT method for low-power PV cells 

      Penella López, María Teresa; Gasulla Forner, Manuel (2014-01-01)
      Article
      Open Access
      Small-size PV cells have been used to power sensor nodes. These devices present limited computing resources and so low complexity methods have been used in order to extract the maximum power from the PV cells. Among them, ...
    • A ZigBee wireless sensor network compliant with the IEEE1451 standard 

      Higuera Portilla, Jorge Eduardo; Polo Cantero, José; Gasulla Forner, Manuel (2009)
      Conference report
      Open Access
      Wireless sensor networks are becoming very attractive for monitoring and control applications with smart sensor nodes. We present an implementation of a ZigBee wireless sensor network compliant with the IEEE1451 standard ...
    • An Add-On Electronic Device to Upgrade Mechanical Gas Meters into Electronic Ones 

      Ripoll Vercellone, Edgar; Ferrandiz, Vicent; Gasulla Forner, Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2018)
      Conference report
      Open Access
      Smart utilities enable more efficient energy consumption and distribution and are the key for smart homes development. We propose an electronic device that will be integrated as an add-on to already installed conventional ...
    • Analysis of the optimum gain of a high-pass l-matching network for rectennas 

      Gasulla Forner, Manuel; Jordana Barnils, José; Robert Sanxis, Francesc Josep; Berenguer Sau, Jordi (MDPI AG, 2017-07-25)
      Article
      Open Access
      Rectennas, which mainly consist of an antenna, matching network, and rectifier, are used to harvest radiofrequency energy in order to power tiny sensor nodes, e.g., the nodes of the Internet of Things. This paper demonstrates ...
    • Análisis de una tecnología de carga de dispositivos inalámbricos. Informe técnico 

      Gasulla Forner, Manuel (2015-01-22)
      External research report
      Restricted access - confidentiality agreement
    • Buck converter for low-power PV modules: A Comparative Study 

      Reverter Cubarsí, Ferran; Gasulla Forner, Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2018)
      Conference report
      Open Access
      Autonomous sensors that harvest energy from the environment usually employ a dc/dc converter to regulate the operating voltage of the energy transducer around its maximum power point (MPP). In this context, this work ...
    • Design and development of a kinetic energy harvester device for oceanic drifter applications 

      Carandell Widmer, Matias; Toma, Daniel; Carbonell Ventura, Montserrat; Gasulla Forner, Manuel; Río Fernandez, Joaquín del (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      A novel electronic energy harvester (EH) has been developed for oceanic undrogued drifter applications. First, spherical body motion simulation has been performed at sea environment in Orcaflex. Results help to understand ...
    • Design and testing of a kinetic energy harvester embedded into an oceanic drifter 

      Carandell Widmer, Matias; Toma, Daniel; Carbonell Ventura, Montserrat; Río Fernandez, Joaquín del; Gasulla Forner, Manuel (2020-02-28)
      Article
      Open Access
      A novel Kinetic Energy Harvester (KEH) has been developed for powering oceanic undrogued drifters. It consists on a double pendulum system capable of transforming the wave oscillations into rotation on a flywheel. This ...
    • Differential inductive sensor-to-microcontroller interface circuit 

      Kokolanski, Zivko; Gasulla Forner, Manuel; Reverter Cubarsí, Ferran (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Restricted access - publisher's policy
      This paper proposes a low-cost interface circuit for differential inductive sensors where the sensor is directly connected to a microcontroller unit (MCU) without any active intermediate electronics in between. The timer ...
    • Direct inductive sensor-to-microcontroller interface circuit 

      Kokolanski, Zivko; Jordana Barnils, José; Gasulla Forner, Manuel; Dimcev, Vladimir; Reverter Cubarsí, Ferran (2015-04-01)
      Article
      Open Access
      This paper proposes and analyses a microcontroller-based interface circuit for inductive sensors with a variable self-inductance. Besides the microcontroller (mu C) and the sensor, the circuit just requires an external ...
    • Direct interface for capacitive sensors based on the charge transfer method 

      Gaitán Pitre, Jorge Eliécer; Gasulla Forner, Manuel; Pallàs Areny, Ramon (2007-05-01)
      Conference report
      Open Access
      We present the theoretical analysis and experimental performance results of a direct interface for capacitive sensors based on the charge transfer method when parasitic capacitances are included. The interface circuit ...
    • Efficiency Optimization in Burst-Mode Buck DC/DC Converters for Sensor Nodes 

      Reverter Cubarsí, Ferran; Glaser, Chris; Gasulla Forner, Manuel (2018-07-08)
      Article
      Open Access
      In autonomous sensor nodes, switching dc/dc converters are usually employed to power the sensor electronics and also to maintain the operating voltage of an energy transducer around its maximum power point. In such a ...
    • Electrònica en les telecomunicacions: pràctiques de laboratori 

      Gasulla Forner, Manuel (Universitat Politècnica de Catalunya, 2016)
      Practice
      Open Access