Browsing by Author "Rodrigo López, Daniel"

Now showing items 1-19 of 19

    • A figure-of-merit for pattern reconfigurable antennas 

      Rodrigo López, Daniel; Romeu Robert, Jordi; Capdevila Cascante, Santiago; Jofre Roca, Lluís (2013-03)
      Article
      Restricted access - publisher's policy
      The performance of pattern reconfigurable antennas is evaluated with the purpose of deriving a figure-of-merit for pattern reconfigurability. A general formulation is provided for the average gain achieved by a ...

    • A frequency reconfigurable cell for beam-scanning reflectarrays 

      Rodrigo López, Daniel; Jofre Roca, Lluís; Perruisseau Carrier, Julien (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      Reflectarray antennas are excellent candidates for beam-scanning applications thanks to their low loss, light and quasi-planar structure and ease of electronic control. However, reflectarray antennas suffer from narrower ...

    • A new class of antenna array with a reconfigurable element factor 

      Li, Zhouyuan; Rodrigo López, Daniel; Jofre Roca, Lluís; Cetiner, Bedri Artug (2013-04)
      Article
      Restricted access - publisher's policy
      A parasitic layer-based multifunctional reconfigurable antenna array (MRAA) formed by the linear combination of four (4 1) identical multifunctional reconfigurable antenna (MRA) elements is presented. Each MRA produces ...

    • A quad-band antenna for public safety applications 

      Mopidevi, Hema Swaroop; Damgaci, T; Rodrigo López, Daniel; Jofre Roca, Lluís; Cetiner, Bedri Artug (2014-01-01)
      Article
      Restricted access - publisher's policy
      The design, fabrication, and characterization of a frequency-reconfigurable antenna for the United States Public Safety (PS) wireless communication applications are presented. This antenna is quad-band operating in the PS ...

    • Antenna reconfigurability based on a novel parasitic pixel layer 

      Rodrigo López, Daniel; Damgaci, Yasin; Unlu, M.; Cetiner, Bedri Artug; Romeu Robert, Jordi; Jofre Roca, Lluís (2011)
      Conference report
      Restricted access - publisher's policy
      A novel reconfiguration method based in the use of pixel surfaces as parasitic elements is presented. This concept can be used to provide reconfigurability to a wide variety of non-reconfigurable antennas without requiring ...

    • Circular beam-steering reconfigurable antenna with liquid metal parasitics 

      Rodrigo López, Daniel; Jofre Roca, Lluís; Cetiner, Bedri Artug (2012-04)
      Article
      Restricted access - publisher's policy
      A novel antenna reconfiguration mechanism based on the displacement of liquid metal sections is presented. The liquid nature of the moving parts of the antenna helps avoid the main disadvantage of mechanically-actuated ...

    • Diseño y optimización genética de antenas pixeladas reconfigurables 

      Rodrigo López, Daniel (Universitat Politècnica de Catalunya, 2009-08-29)
      Master thesis (pre-Bologna period)
      Open Access
      Historically, antennas have been considered as static elements in communication systems. However, during the last ten years, the concept of recon gurable antenna has gained importance. This concept consists on an antenna ...

    • Frequency and radiation pattern reconfigurability of a multi-size pixel antenna 

      Rodrigo López, Daniel; Jofre Roca, Lluís (2012)
      Article
      Restricted access - publisher's policy
      Pixel reconfigurable apertures constitute one of the most adaptable structures regarding antenna reconfiguration, being capable to achieve frequency and pattern compound reconfiguration. However, pixel antennas require ...

    • Frequency, radiation pattern and polarization reconfigurable antenna using a parasitic pixel layer 

      Rodrigo López, Daniel; Cetiner, Bedri Artug (2014-06-01)
      Article
      Restricted access - publisher's policy
      This communication presents a reconfigurable antenna capable of independently reconfiguring the operating frequency, radiation pattern and polarization. A switched grid of small metallic patches, known as pixel surface, ...

    • Genetic reconfigurability of a multi-size pixelled antenna 

      Rodrigo López, Daniel; Jofre Roca, Lluís; Unlu, M.; Damgaci, Yacine; Cetiner, Bedri Artug; Romeu Robert, Jordi (2010)
      Conference report
      Open Access

    • Interference rejection using frequency and pattern reconfigurable antennas 

      Rodrigo López, Daniel; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      Interference rejection by taking advantage of the radiation pattern diversity of a reconfigurable antenna is considered. It is proposed to use simultaneously frequency and radiation reconfiguration to extend interference ...

    • Parasitic layer-based reconfigurable antenna design by multi-objective optimization 

      Yuan, Xiaoyan; Li, Zhouyuan; Rodrigo López, Daniel; Mopidevi, Hema Swaroop; Kaynar, Oguz; Jofre Roca, Lluís; Cetiner, Bedri Artug (2012-06)
      Article
      Restricted access - publisher's policy
      A parasitic layer-based multifunctional reconfigurable antenna (MRA) design based on multi-objective genetic algorithm optimization used in conjunction with full-wave EM analysis is presented. TheMRA is capable of ...

    • Pixel reconfigurable antennas: towards low-complexity full reconfiguration 

      Rodrigo López, Daniel; Romeu Robert, Jordi; Cetiner, Bedri Artug; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      The explosive growth of wireless communications has brought new requirements in terms of compactness, mobility and multi-functionality that make reconfigurable antennas excellent candidates for future wireless networks. ...

    • Real-Time Recon gurable Pixelled Antennas 

      Rodrigo López, Daniel (Universitat Politècnica de Catalunya, 2010-07)
      Master thesis
      Open Access
      Recon gurable antennas are radiating structures that integrate an inner mechanism that allows the modi cation of its properties (resonant frequency, radiation diagram or polarization). Pixelled antennas are a particular ...

    • Reconfigurable pixel antennas for communications 

      Rodrigo López, Daniel (Universitat Politècnica de Catalunya, 2013-06-14)
      Doctoral thesis
      Open Access
      The explosive growth of wireless communications has brought new requirements in terms of compactness, mobility and multi-functionality that pushes antenna research. In this context, recon gurable antennas have gained a lot ...

    • Reconfigurable pixel-layer isolator for frequency-tunable on-frequency repeaters 

      Rodrigo López, Daniel; Díaz Tapia, Edgar; Jofre Roca, Lluís (2014)
      Article
      Restricted access - publisher's policy
      The maximum gain in on-frequency repeaters is limited by the isolation level between their two antennas due to close-loop stability conditions. In this letter, a novel pixel-layer isolator for tunable on-frequency repeaters ...

    • RF MEMS reconfigurable two-band antenna 

      Zohur, Abdul; Mopidevi, Hema Swaroop; Rodrigo López, Daniel; Unlu, M.; Jofre Roca, Lluís; Cetiner, Bedri Artug (2013-01-09)
      Article
      Restricted access - publisher's policy

    • Small pixelled antenna with mems-reconfigurable radiation pattern 

      Rodrigo López, Daniel; Damgaci, Yacine; Unlu, M.; Jofre Roca, Lluís; Cetiner, Bedri Artug (2010)
      Conference report
      Open Access

    • Unit cell for frequency-tunable beamscanning reflectarrays 

      Rodrigo López, Daniel; Jofre Roca, Lluís; Perruisseau Carrier, Julien (2013-12)
      Article
      Restricted access - publisher's policy
      A reflectarray cell able to dynamically control the reflection phase at a variable frequency is presented. This capability enables beam-scanning reflectarrays with frequency reconfigurability, which is a novel capability ...