Now showing items 1-15 of 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)
      Conference lecture
      Open Access
      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
      Open Access
    • 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)
      Conference report
      Open Access
      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
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
    • 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)
      Conference report
      Open Access
      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)
      Conference report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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)
      Conference report
      Restricted access - publisher's policy
      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
      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 ...
    • Small handset antenna for FM reception 

      Aguilar, David; Anguera, Jaume; Puente Baliarda, Carles; Ribó, Miquel (2008-10)
      Article
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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 ...