Envíos recientes

  • High-order PLL design with constant phase margin 

    Ugarte Gil, Mikel; Carlosena García, Alfonso (IEEE, 2010)   Congreso / Biltzarra
    In this paper we describe a novel procedure to design high-type high-order Phase Locked Loops (PLLs) from lower order prototypes, preserving a prescribed Phase Margin (PM). The method builds on a model recently proposed ...
  • Sculpting metals for anomalous transmission phenomena, complex waves and negative refractive metamaterials: underlying physics and applications 

    Navarro Cía, Miguel (2011)   Congreso / Biltzarra
    In this talk, the potential of controlling the electromagnetic propagation by periodically-textured surfaces is reviewed. It is shown that backward-wave- and slow-wave-propagation, superluminal, effective negative ...
  • Mejora de antenas metalo-dieléctricas en la banda de frecuencias GSM-UMTS mediante elementos en transmisión extraordinaria 

    Illescas, Jesús; Estévez, Aritz; Falcone Lanas, Francisco Javier; Marcotegui, José Antonio (2009)   Congreso / Biltzarra
    In this work a dual band GSM/UMTS antenna is proposed. The antenna is based on a stacked planar structure, where the combination of collimation by Enhanced Transmission and the use of parasitic director elements is ...
  • Evalución de dosimetría de campos electromagnéticos en el entorno interior doméstico 

    Esparza Alfaro, Fermín; Carranza, Noemí; Torres Landívar, Víctor; Falcone Lanas, Francisco Javier; Ramos González, Victoria (2009)   Congreso / Biltzarra
    In this work, the evaluation of radiofrequency exposure in a domestic environment is analyzed. 3D raytracing simulation results are compared with dossimetry measurement results in a probe household in a dense urban area ...
  • Análisis del comportamiento de esquemas de modulación adaptativos en LTE 

    Torres Landívar, Víctor; Esparza Alfaro, Fermín; Falcone Lanas, Francisco Javier (2009)   Congreso / Biltzarra
    In this work, the behaviour of several modulation schemes used in 3GPP R8 or Long Term Evolution (LTE) Systems is analyzed. In order to increase the capacity of future mobile networks, high order modulation schemes like ...
  • Implementacion de línea de ε negativa en tecnología stripline 

    Illescas, Jesús; Jarauta Ayensa, Eduardo; Estévez, Aritz; Marcotegui, José Antonio; Falcone Lanas, Francisco Javier (2009)   Congreso / Biltzarra
    In this work, a negative-ε equivalent response medium is proponed in stripline technology. To achieve band rejection behaviour, Complementary Split Ring Resonators (CSRR) are placed in the central conductor strip of ...
  • Sensing in coin discriminators 

    Carlosena García, Alfonso; López Martín, Antonio; Arizti, Fernando; Martínez de Guereñu, Ane; Pina Insausti, José L.; García Sayés, Miguel (IEEE, 2007)   Congreso / Biltzarra
    This paper describes the technologies used in coin discriminator devices, stressing the improvements and novel mechanisms introduced by the authors in the past few years as a result of the cooperation with one leading ...
  • Implementación eficiente de sistemas GALS sobre FPGAs 

    García Lasheras, Javier (2007)   Congreso / Biltzarra
    Este artículo presenta un nuevo modelo para la implementación de Sistemas Globalmente Asíncronos – Localmente Síncronos (GALS) sobre Matrices de Puertas Programables por Campo (FPGA) comerciales. Esta nueva visión está ...
  • Efficient implementation of GALS systems over comercial synchronous FPGAs: a new approach 

    García Lasheras, Javier (2007)   Congreso / Biltzarra
    This paper introduces a new approach for implementing Glocally Asynchronous – Locally Synchronous (GALS) systems over commercial available Field Programmable Gate Arrays (FPGA). This new vision is aimed to overcome the ...
  • A novel design method for phase-locked loops of any order and type 

    Carlosena García, Alfonso; Mànuel Lázaro, Antonio (IEEE, 2006)   Congreso / Biltzarra
    In this paper a novel approach to the design of PLLs is presented, which can be used regardless of their Order and Type. The method stems from the fact that high-frequency poles in the loop filter determine filtering ...
  • Technical specifications and quality control procedures for reducing the uncertainty in PV installations: results of the FP7 project PVCROPS 

    Martínez Moreno, Francisco; Lorenzo Pigueiras, Eduardo; Narvarte Fernández, Luis; Moretón Villagra, Rodrigo; Tyutyundzhiev, Nicolay; Parra Laita, Íñigo de la (EU PVSEC, 2015)   Congreso / Biltzarra
    PVCROPS (PhotoVoltaic Cost r€duction, Reliability, Operational performance, Prediction and Simulation) is a project within the European Framework Programme 7 whose objectives are: improving the performance, reliability ...
  • All-metallic ε-near-zero (ENZ) lens based on ultra-narrow hollow rectangular waveguides: experimental results 

    Orazbayev, Bakhtiyar; Torres Landívar, Víctor; Pacheco Peña, Víctor; Falcone Lanas, Francisco Javier; Teniente Vallinas, Jorge; Beruete Díaz, Miguel; Sorolla Ayza, Mario; Navarro Cía, Miguel; Engheta, Nader (IEEE, 2014)   Congreso / Biltzarra
    Here we perform numerical and experimental investigation of plano-concave all-metallic ε-near-zero (ENZ) lens with operational frequency f = 144 GHz. The ENZ lens is achieved by stacking an array of narrow hollow rectangular ...
  • Low profile THz periodic leaky-wave antenna 

    Beaskoetxea Gartzia, Unai; Beruete Díaz, Miguel; Rodríguez Ulibarri, Pablo; Etayo Salinas, David; Sorolla Ayza, Mario; Navarro Cía, Miguel; Zehar, Mokhtar; Blary, Karine; Chahadih, Abdallah; Han, Xiang-Lei; Akalin, Tahsin (IEEE, 2014)   Congreso / Biltzarra
    In this work, a 0.566THz flat leaky-wave antenna, consisting of a central λ0/2 slot surrounded by straight parallel wedge corrugations, is numerically and experimentally analyzed. Simulations show a moderately high gain ...
  • Parametric study of pin surface used to suppress undesired modes in a packaged W-band microstrip receiver 

    Rebollo Mugueta, Ainara; Maestrojuán Biurrun, Itziar; Larumbe Gonzalo, Belén; Gonzalo García, Ramón; Íñigo Ederra Urzainqui (IEEE, 2013)   Congreso / Biltzarra
    A pin surface structure has been used in order to suppress undesired modes in a packaged W-band RF front-end receiver. A parametric analysis has been carried out in order to determine the optimum dimensions. Resonances ...
  • Experimental study of the antenna influence in RTLS based-on RFID 

    Crespo López, Gonzalo; Teniente Vallinas, Jorge; Ederra Urzainqui, Íñigo; Gonzalo García, Ramón (IEEE, 2012)   Congreso / Biltzarra
    Nowadays Real-time localization systems (RTLS) are growing up very quickly but there are some remaining issues which need to be analyzed. This paper presents an experimental study that shows how different kind of antennas can ...
  • Corrugated horn antenna noise temperature characterisation for the NRL water vapor millimeter-wave spectrometer project 

    Teniente Vallinas, Jorge; Gómez, R.M.; Maestrojuán Biurrun, Itziar; Rebollo Mugueta, Ainara; Gonzalo García, Ramón; Río Bocio, Carlos del (2011)   Congreso / Biltzarra
    In this paper the antenna noise temperature for two different corrugated horn antennas (old model and new model) for NRL WVMS is being characterized. The whole optical system will be simulated with Ticra’s GRASP software, ...
  • The beauty of anisotropy in extraordinary transmission fishnet metamaterials 

    Navarro Cía, Miguel; Beruete Díaz, Miguel; Sorolla Ayza, Mario (2011)   Congreso / Biltzarra
    In this work, we explore both numerically and experimentally, the possibility to obtain positive and negative refraction regimes that depend on the wave polarization, exploiting the strong anisotropy of extraordinary ...
  • Analysis of surface-plasmon-like modes under an engineering perspective 

    Navarro Cía, Miguel; Beruete Díaz, Miguel; Sorolla Ayza, Mario (2011)   Congreso / Biltzarra
    In this communication we show how one can exploit equivalent circuits to analyze surface-plasmon-like modes (slit and hole arrays, Sievenpiper mushrooms and coaxial hole arrays) and to propose new designs with outstanding ...
  • New regimes to achieve enhanced transmission through subwavelength hole arrays 

    Navarro Cía, Miguel; Beruete Díaz, Miguel; Sorolla Ayza, Mario (2011)   Congreso / Biltzarra
    In this communication we present millimetre- and THz-waves experimental confirmation of enhanced transmission through subwavelength hole arrays with rectangular lattice when the incident electric field is parallel to ...
  • Discrete lenses for multibeam applications 

    Lizarraga Cubillos, Juan Camilo; Crespo López, Gonzalo; Río Bocio, Carlos del (2011)   Congreso / Biltzarra
    The capability of having many different beams illuminating the earth surface from a geostationary satellite has been an issue of interest during the last few years. The need of increasing the services provided ...

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