Browsing by Author "Ramírez Arroyave, Germán Augusto"

Now showing items 1-8 of 8

    • Design of minimum nonlinear distortion reconfigurable antennas for next-generation communication systems 

      Ramírez Arroyave, Germán Augusto; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís; Araque Araque, Javier Leonardo; Cetiner, Bedri Artug; Jofre Roca, Lluís (Multidisciplinary Digital Publishing Institute (MDPI), 2022-03-01)
      Part of book or chapter of book
      Open Access
      Nonlinear effects in the radio front-end can degrade communication quality and system performance. In this paper we present a new design technique for reconfigurable antennas that minimizes the nonlinear distortion and ...

    • Design of minimum nonlinear distortion reconfigurable antennas for next-generation communication systems 

      Ramírez Arroyave, Germán Augusto; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís; Araque Araque, Javier Leonardo; Cetiner, Bedri Artug; Jofre Roca, Lluís (2021-04-01)
      Article
      Open Access
      Nonlinear effects in the radio front-end can degrade communication quality and system performance. In this paper we present a new design technique for reconfigurable antennas that minimizes the nonlinear distortion and ...

    • Millimeter-wave MIMO array measurement system for imaging and channel characterization 

      Ballesteros Sánchez, Christian; Montero Bayo, Luca; Ramírez Arroyave, Germán Augusto; Dagatti, Mayco; Solano Pérez, José Antonio; Molina García-Pardo, José María; Romeu Robert, Jordi; Jofre Roca, Lluís (Universidad de Málaga, 2020)
      Conference lecture
      Restricted access - publisher's policy
      Millimeter-wave band offer unique characteristicsto obtain good spatial position and resolution of certain type oftargets. The aim of this paper is to study a near-field focusingtechnique applied to the ...

    • Multi-antenna 3D pattern design for millimeter-wave vehicular communications 

      Ballesteros Sánchez, Christian; Montero Bayo, Luca; Ramírez Arroyave, Germán Augusto; Jofre Roca, Lluís (Elsevier, 2022-06)
      Article
      Open Access
      The transformation of the automotive industry towards ubiquitous connection of vehicles with all kind of external agents (V2X) motivates the use of a wide range of frequencies for several applications. Millimeter-wave ...

    • Reconfigurable dual-polarized beam-steering broadband antenna using a crossed-strips geometry 

      Ramírez Arroyave, Germán Augusto; Zhou, Ivan; Blanch Boris, Sebastián; Towfiq, Asaduzzaman; Cetiner, Bedri Artug; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2021-08)
      Article
      Open Access
      In this letter, a reconfigurable dual-polarized broadband antenna with beam-steering capabilities using a parasitic layer is proposed for 5G new radio (NR) frequency range 1 (FR-1) applications. The antenna is a dual-port ...

    • Study on beamforming V2I scenarios for sub-6 GHz and mmWave channels 

      Ballesteros Sánchez, Christian; Ramírez Arroyave, Germán Augusto; Montero Bayo, Luca; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      The study of the wireless channel between a hybrid massive MIMO Base Station (BS) and a vehicular platform is proposed. Several multi-antenna geometries and MIMO architectures in both vehicle and BS are numerically modeled ...

    • Three-Dimensional beamsteering low complexity reconfigurable multilevel antenna 

      Zhou, Ivan; Ramírez Arroyave, Germán Augusto; Montero Bayo, Luca; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (2020-04)
      Article
      Open Access
      A low-complexity reconfigurable antenna (RA) capable of steering its beam into nine different directions corresponding to ¿={-42°,0°,42°} in the ¿={25°,0°,155°} planes, and ¿=±25° in the ¿=90° plane, using a reduced number ...

    • X-parameters based characterization of PIN diodes for reconfigurable antenna assessment 

      Ramírez Arroyave, Germán Augusto; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís; Jofre Roca, Lluís (Íñigo Cuiñas Gómez, 2021)
      Conference report
      Restricted access - publisher's policy
      This contribution presents the non-linear characterization up to 50 GHz of a PIN diode commonly used as switch for reconfigurable devices at microwave applications. Non-linear models are extracted by means of X-parameter ...