Now showing items 1-14 of 14

  • A highly-repeatable, broadband 180º phase switch for integrated MEMS processes 

    Llamas Morote, Marco Antonio; Girbau Sala, David; Ribó, M.; Pradell i Cara, Lluís; Giacomozzi, Flavio; Colpo, S.; Coccetti, Favio; Aouba, Stephane (2011)
    Conference report
    Restricted access - publisher's policy
    A broadband 0º/180º phase switch based on a slotline-coplanar-waveguide cross loaded with two MEMS switches in opposed (ON/OFF or OFF/ON) states, is reported. The fabrication was made on high-resistivity silicon substrates ...
  • A low-power-consumption out-of-Plane electrothermal actuator 

    Girbau Sala, David; Llamas Morote, Marco Antonio; Casals Terré, Jasmina; Simó Selvas, Francisco Javier; Pradell i Cara, Lluís; Lázaro Guillén, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-06-30)
    Article
    Open Access
    This paper proposes a new vertical electrothermal actuator. It can be considered as a hybrid between the traditional in-plane buckle-beam actuator and the vertical hot-cold actuator. It is here referred to as vertical ...
  • Analytical energy model for the dynamic behavior of RF MEMS switches under increased actuation voltage 

    Casals Terré, Jasmina; Llamas, Marco Antonio; Girbau Sala, David; Pradell i Cara, Lluís; Lázaro Guillén, Antonio; Giacomozzi, Flavio; Colpo, Sabrina (2014-12-01)
    Article
    Restricted access - publisher's policy
    In this paper, the dynamic behavior of electrostatically actuated radio frequency-microelectromechanical system (RF-MEMS) switches is analyzed using energy considerations. An analytical model for bridge-type RF-MEMS switches ...
  • Capacitive and resistive RF-MEMS switches 2.5D & 3D Electromagnetic and Circuit modelling 

    Giacomozzi, Flavio; Colpo, S.; Plana, Robert; Llamas Morote, Marco Antonio; Girbau Sala, David; Pausas, Esther; Pradell i Cara, Lluís; Aouba, Stephane; Villneuve, C.; Puyal, Vincent; Pons, Patrick (2009)
    Conference report
    Open Access
    this paper proposes different strategies for the electrical modelling of capacitive and resistive RF-MEMS switches which take into account the dependence of the electrical performance on the mechanical properties and ...
  • Characterization of dynamics and power handling of RF MEMS using vector measurement techniques 

    Girbau Sala, David; Lázaro Guillén, Antoni; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2004-11-30)
    Article
    Open Access
    This paper proposes a new method to measure dynamics and power handling of RF microelectromechanical systems (MEMS) devices based on a mobile membrane. The method uses in-phase/quadrature demodulation of an RF signal ...
  • Characterization of dynamics in RF-MEMS switches 

    Llamas Morote, Marco Antonio; Girbau Sala, David; Pradell i Cara, Lluís; Lázaro Guillén, Antoni; Giacomozzi, Flavio; Colpo, S (2009)
    Conference report
    Open Access
    This paper proposes a new method to measure dynamics and power handling of RF microelectromechanical systems (MEMS) devices based on a mobile membrane. The method uses in-phase/quadrature demodulation of an RF signal ...
  • Distortion produced by RF MEMS varactors on digital communication signals 

    Lázaro Guillén, Antoni; Girbau Sala, David; Pradell i Cara, Lluís (JOHN WILEY & SONS INC, 2006-02-28)
    Article
    Open Access
    This paper presents a study of the nonlinear effects introduced by MEMS varactors when excited with digitally modulated RF signals (QPSK and 16 QAM). The study is based on simulating a nonlinear model of the MEMS device ...
  • Electrothermally actuated RF MEMS switches suspended on a low-resistivity substrate 

    Girbau Sala, David; Pradell i Cara, Lluís; Lázaro Guillén, Antoni; Nebot Serra, Àlvar (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-10-31)
    Article
    Open Access
    This paper presents an electrothermally actuated lateral resistive-contact switch for application to low-gigahertz-band communication systems. It was manufactured on a standard low-resistivity substrate, and its RF performance ...
  • Nonlinear actuation model for lateral electrostatically-actuated DC-contact RF MEMS series switches. 

    Lázaro Guillén, Antoni; Girbau Sala, David; Pradell i Cara, Lluís; Nebot Serra, Àlvar (JOHN WILEY & SONS INC, 2007-06-01)
    Article
    Open Access
    In this work, a nonlinear model to predict actuation characteristics in lateral electrostatically-actuated DC-contact MEMS switches is proposed. In this case a parallel-plate approximation cannot be applied. The model ...
  • RF-MEMS uniplanar 180° phase switch based on a multimodal air-bridged CPW cross 

    Llamas Morote, Marco Antonio; Girbau Sala, David; Ribó, M.; Pradell i Cara, Lluís; Giacomozzi, Flavio; Colpo, S (2011-07)
    Article
    Restricted access - publisher's policy
    In this paper, a new compact broadband uniplanar 180 phase switch, based on an air-bridged coplanar-waveguide (CPW) cross loaded with two capacitive-contact microelectromechancial systems (MEMS) switches in opposed (ON/OFF) ...
  • RF-MEMS uniplanar 180º Phase Switch based on switching between two out-of-phase paths 

    Llamas Morote, Marco Antonio; Pradell i Cara, Lluís; Girbau Sala, David; Ribó, Miquel; Lázaro Villa, José Antonio; Giacomozzi, Flavio; Margesin, Benno (2011)
    Article
    Restricted access - publisher's policy
    A phase switch based on switching between two twoport passive networks with a phase difference of 180º is reported. Two RF MEMS single-pole-double-throw structures are used to select the phase path. The fabrication is ...
  • Study of intermodulation in RF MEMS variable capacitors 

    Girbau Sala, David; Otegi Urdanpilleta, Nerea; Pradell i Cara, Lluís; Lázaro Guillén, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-03-31)
    Article
    Open Access
    This paper provides a rigorous study of the causes and physical origins of intermodulation distortion (IMD) in RF microelectromechanical systems (MEMS) capacitors, its analytical dependence on the MEMS device design ...
  • Tunable dual-band filters based on capacitive-loaded stepped-impedance resonators 

    Girbau Sala, David; Lázaro Guillén, Antoni; Pérez, A.; Martínez, Ester; Pradell i Cara, Lluís; Villarino Villarino, Ramón (2009)
    Conference report
    Open Access
    This paper proposes the design of tunable dual-band filters for multi-band multi-standard systems. The main objective is to provide frequency tunability in the second band while maintaining the first band fixed. To this ...
  • Tunable dual-band resonators for communication systems 

    Girbau Sala, David; Lázaro Guillén, Antoni; Obiols Pérez, Alberto; Martínez, Ester; Pradell i Cara, Lluís; Villarino Villarino, Ramón (2010-06-01)
    Article
    Restricted access - publisher's policy
    This paper proposes the design of tunable dual-band resonators for multi-band multi-standard systems. The main objective is to provide frequency tunability in the second resonance while maintaining the first resonance ...