Ara es mostren els items 1-15 de 15

  • A RF-MEMS switchable CPW air-bridge 

    Contreras, Adrián; Casals Terré, Jasmina; Pradell i Cara, Lluís; Giacomozzi, Flavio; Colpo, Sabrina; Iannacci, Jacopo; Ribó, Miquel (2012)
    Comunicació de congrés
    Accés obert
    This work presents a new shunt-type ohmic contact RF-MEMS switch specifically designed as a switchable CPW air bridge. The switch can be used in coplanar waveguide (CPW) reconfigurable multimodal circuits, for a selective ...
  • Certificació notarial digital 

    Ribó, Miquel (ANCERT, 2011-04-19)
    Audiovisual
    Accés obert
  • Conmutadores RF-MEMS de baja tensión 

    Contreras Lizarraga, Adrián Arturo; Casals Terré, Jasmina; Pradell i Cara, Lluís; Colpo, Sabrina; Iannacci, Jacopo; Ribó, Miquel; Giacomozzi, Flavio (2012)
    Text en actes de congrés
    Accés obert
    This work shows experimental results of capacitive and ohmic RF-MEMS switches with low actuation voltage. The isolation of capacitive switches is better than 20 dB from 15 GHz and up to 80 GHz according to simulations. ...
  • CPW balun for printed balanced antennas 

    Sanchez, Albert Miquel; Ribó, Miquel; Pradell i Cara, Lluís; Anguera Pros, Jaume; Andujar, Aurora (Institution of Electrical Engineers, 2014-05-22)
    Article
    Accés restringit per política de l'editorial
    In coplanar waveguide (CPW) circuits, printed balanced antennas must be excited through baluns. These baluns often feature coplanar-to-slotline transitions that must be tuned and matched by electromagnetic optimisation, ...
  • Diseño de antenas multibanda para telefonía móvil mediante la manipulación del plano de masa 

    Picher, C.; Anguera Pros, Jaume; Cabedo, Arnau; Ribó, Miquel; Pijoan, Joan L.; Puente Baliarda, Carles (2007)
    Text en actes de congrés
    Accés obert
  • Electromagnetic interference prediction in an in-house power-line 

    Samso, Margarita; Ribó, Miquel; Sanchez, Albert-Miquel; Regué, J.R.; Aragon Homar, Marc; Silva Martínez, Fernando (IEEE, 2012)
    Text en actes de congrés
    Accés obert
    Abstract —In this paper a new methodology for the prediction of the conducted-emission propagation in an in-house power- line network is presented. This methodology is based on the modal S -parameter characterization ...
  • Handset antenna design for FM reception 

    Anguera Pros, Jaume; Aguilar, David; Vergés, Jordi; Ribó, Miquel; Puente Baliarda, Carles (IEEE, 2008)
    Text en actes de congrés
    Accés obert
    A passive internal handset antenna for FM reception is presented. Several prototypes have been simulated and tested showing the interesting potential of this solution to eliminate the long cable 1 meter length used at the ...
  • Low voltage capacitive and Ohmic RF-MEMS Switches 

    Contreras Lizarraga, Adrián Arturo; Casals Terré, Jasmina; Pradell i Cara, Lluís; Giacomozzi, Flavio; Colpo, Sabrina; Iannacci, Jacopo; Ribó, Miquel (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This work presents experimental results of capacitive and ohmic-contact RF-MEMS switches. The suspension has been designed to compensate stress-gradient effects, and to obtain low pull-in voltages. The measured actuation ...
  • Modelado circuital multimodal de un resonador pasobanda reconfigurable 

    Contreras Lizarraga, Adrián Arturo; Ribó, Miquel; Pradell i Cara, Lluís (2010)
    Text en actes de congrés
    Accés obert
    In this work, we present a simple uniplanar bandpass resonator that can be used for the development of reconfigurable uniplanar filters. The multimodal behaviour of the coplanar waveguide is taken into account for the ...
  • Multi-band handset antenna combining a PIFA, solts, and ground plane modes 

    Cabedo, Arnau; Anguera, Jaume; Picher, C.; Ribó, Miquel; Puente Baliarda, Carles (2009)
    Article
    Accés restringit per política de l'editorial
    A multiband handset antenna combining a PIFA and multiple slots on a ground plane is presented. It is shown by means of simulations that the slots on the ground plane have a double function: to tune the ground plane resonance ...
  • Multiband handset antennas by means of groundplane modification 

    Anguera Pros, Jaume; Cabedo, Arnau; Picher, Cristina; Sanz, Ivan; Ribó, Miquel; Puente Baliarda, Carles (Institute of Electrical and Electronics Engineers (IEEE), 2007)
    Text en actes de congrés
    Accés obert
    A technique consisting in designing the groundplane of a handset antenna is presented. The technique is applied to PIFA antennas to show how the bandwidth can be enhanced. Particularly, a dual-band PIFA operating at GSM900 ...
  • Reconfigurable uniplanar bandpass filter based on RF-MEMS switched capacitors 

    Contreras, Adrián; Pradell i Cara, Lluís; Casals Terré, Jasmina; Giacomozzi, Flavio; Iannacci, Jacopo; Ribó, Miquel (2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, an uniplanar RF-MEMS second-order bandpass filter with reconfigurable centre frequency is presented. It is based on half-wavelength slotline resonators, which are loaded using RF-MEMS switches connected ...
  • 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
    Accés restringit per política de l'editorial
    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 ...
  • Small handset antenna for FM reception 

    Aguilar, David; Anguera, Jaume; Puente Baliarda, Carles; Ribó, Miquel (2008-10)
    Article
    Accés restringit per política de l'editorial
    A passive internal handset antenna for FM reception is presented using electromagnetic simulations as well as laboratory experiments. Received signal for the antennas have been demodulated and the quality of the audio ...
  • Uniplanar bandpass filters based on multimodal immitance inverters and end-coupled slotline resonators 

    Contreras Lizarraga, Adrián Arturo; Ribó, Miquel; Pradell i Cara, Lluís; Blondy, Pierre (IEEE Microwave Theory and Techniques Society, 2013)
    Article
    Accés restringit per política de l'editorial
    This paper presents the design and implementation of uniplanar bandpass filters that use end-coupled slotline resonators and a new kind of multimodal immitance inverter. These inverters are based on an asymmetric ...