Now showing items 1-14 of 14

  • A 125-143-GHz frequency-reconfigurable BiCMOS compact LNA using a single RF-MEMS switch 

    Heredia, Julio; Ribó i Pal, Miquel; Pradell i Cara, Lluís; Wipf, Selin Tolunay; Göritz, Alexander; Wipf, Christian; Kaynak, Mehmet (2019-05-01)
    Article
    Open Access
    In this letter, a 125-143-GHz frequency-reconfigurable BiCMOS compact low-noise amplifier (LNA) is presented for the first time. It consists of two cascode stages and was fabricated using a 0.13-µm SiGe:C BiCMOS process, ...
  • Circuit model for a coplanar-slotline cross 

    Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-12-31)
    Article
    Open Access
    A new 6-port “circuit-model” for coplanar-slotline crosses is presented. The model is based on the separation of the two fundamental Coplanar Waveguide (CPW) modes (even and odd) into different ports. It generalizes previous ...
  • Circuit model for coplanar-slotline tees 

    Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-05-31)
    Article
    Open Access
    Coplanar-slotline tees have been used in a number of microwave circuits, although no complete models were available to explain their behavior. In this letter, a new “circuit-model” for a coplanar-slotline tee is presented. ...
  • Circuit model for coplanar-slotline tees 

    Ribó i Pal, Miquel; Pradell i Cara, Lluís (2000-05)
    Article
    Open Access
    Coplanar-slotline tees have been used in a number of microwave circuits, although no complete models were available to explain their behavior. In this letter, a new
  • Circuit model for mode conversion in coplanar waveguide assymmetric series-impedances 

    Ribó i Pal, Miquel; Cruz Romero, Janill Marie de la; Pradell i Cara, Lluís (Institution of Electrical Engineers, 1999-10)
    Article
    Open Access
    A new 'circuit model' for converting between even and odd modes in asymmetric series impedances in the ground plane of a coplanar waveguide is presented. The model is based on the separation of modes into two input and two ...
  • Circuit Model for mode conversion in coplanar waveguide assymmetric shunt impedances 

    Ribó i Pal, Miquel; Pradell i Cara, Lluís (IEE-INST ELEC ENG, 1999-04-30)
    Article
    Open Access
    A new `circuit model' for the conversion between even and odd modes in coplanar waveguide asymmetric shunt impedances is presented. The model is based on the separation of modes into two input and two output ports. In ...
  • Circuit model for mode conversion in coplanar waveguide asymmetric series-impedances 

    Ribó i Pal, Miquel; Cruz Llopis, Luis Javier de la; Pradell i Cara, Lluís (IEE-INST ELEC ENG, 1999-10-31)
    Article
    Open Access
    A new `circuit model' for converting between even and odd modes in asymmetric series impedances in the ground plane of a coplanar waveguide is presented. The model is based on the separation of modes into two input and two ...
  • Circuit model for slotline-to-coplanar waveguide asymmetrical transitions 

    Ribó i Pal, Miquel; Cruz, J De La; Pradell i Cara, Lluís (Institution of Electrical Engineers, 1999-07)
    Article
    Open Access
    A new 'circuit-model' for slotline-to-coplanar waveguide asymmetrical transitions is presented and applied to the design of slotline resonators. The model, based on the separation of coplanar-waveguide (CPW) modes into two ...
  • Circuit model for slotline-to-coplanar waveguide asymmetrical transitions 

    Ribó i Pal, Miquel; Cruz Llopis, Luis Javier de la; Pradell i Cara, Lluís (IEE-INST ELEC ENG, 1999-07-31)
    Article
    Open Access
    A new `circuit-model' for slotline-to-coplanar waveguide asymmetrical transitions is presented and applied to the design of slotline resonators. The model, based on the separation of coplanar-waveguide (CPW) modes into two ...
  • Compact fully uniplanar bandstop filter based on slow-wave multimodal CPW resonators 

    Contreras Bleda, Adrián; Ribó i Pal, Miquel; Pradell i Cara, Lluís; Raynal, Víctor; Moreno, Ignacio; Combes, Maxence; Ten, Milena (2018-07-26)
    Article
    Open Access
    In this letter, a compact, fully uniplanar bandstop filter is presented. It is based on multimodal coplanar waveguide resonators implemented using a slow-wave periodic structure that greatly reduces the filter’s horizontal ...
  • K-band RF-MEMS uniplanar reconfigurable-bandwidth bandpass filter using multimodal immittance inverters 

    Contreras Lizarraga, Adrián Arturo; Ribó i Pal, Miquel; Pradell i Cara, Lluís; Casals Terré, Jasmina; Giacomozzi, Flavio; Iannacci, Jacopo (Institution of Electrical Engineers, 2013-05-23)
    Article
    Restricted access - publisher's policy
    A K-band RF-MEMS uniplanar second-order bandpass filter with reconfigurable bandwidth is presented. The filter is based on inductively-coupled half-wavelength slotline resonators and CPW-slotline multimodal immittance ...
  • Reconfigurable multimodal bandpass filter based on RF-MEMS switchable CPW air-bridges 

    Contreras Bleda, Adrián; Casals Terré, Jasmina; Pradell i Cara, Lluís; Giacomozzi, Flavio; Iannacci, Jacopo; Ribó i Pal, Miquel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    In this paper, a uniplanar RF-MEMS secondorder bandpass filter with reconfigurable centre frequency is presented. It is based on quarter-wavelength slotline resonators and CPW-slotline multimodal immittance inverters (MIIs), ...
  • Reduced-length uniplanar bandpass filters based on coplanar-waveguide-slotline tees 

    Contreras Bleda, Adrián; Pradell i Cara, Lluís; Ribó i Pal, Miquel; Blondy, Pierre (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Restricted access - publisher's policy
    This paper presents the design and implementation of multimodal uniplanar bandpass filters which use loaded coplanar-waveguide-slotline tees in the slotline resonators to reduce the filter length. The tees are theoretically ...
  • RF-MEMS switches for a full control of the propagating modes in uniplanar microwave circuits and their application to reconfigurable multimodal microwave filters 

    Contreras Lizarraga, Adrián Arturo; Casals Terré, Jasmina; Pradell i Cara, Lluís; Ribó i Pal, Miquel; Heredia Vega, Julio César; Giacomozzi, Flavio; Margesin, Benno (2017-03-29)
    Article
    Open Access
    In this paper, new RF-MEMS switch configurations are proposed to enable control of the propagating (even and odd) modes in multimodal CPW transmission structures. Specifically, a switchable air bridge (a switchable ...