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Envíos recientes

  • Project management in development cooperation. Non-governmental organizations 

    Montes Guerra, Maricela I.; Romero de Miguel, Aida; Pérez Ezcurdia, Amaya; Gimena Ramos, Faustino; Díez Silva, H. Mauricio (Universidad Nacional de Colombia, 2015)   Artículo / Artikulua
    Este artículo analiza la adopción de prácticas propias de la gestión de proyectos en las ONG destinadas a la cooperación para el desarrollo, así como su influencia en la ejecución y el impacto de la aplicación de metodologías, ...
  • La educación de las personas indígenas en la Amazonia Ecuatoriana. El caso de la provincia de Sucumbíos 

    Romero de Miguel, Aida; Fernández de Larrinoa Pablos, Kepa (2016)   Congreso / Biltzarra
    Sucumbíos es una región amazónica habitada por pueblos indígenas diversos. Dispone de una gran cantidad de recursos naturales. En las últimas décadas ha sufrido una gran transformación, consecuencia de la actividad petrolera, ...
  • Dirección de proyectos en intervenciones de cooperación al desarrollo. Organizaciones no gubernamentales 

    Montes Guerra, Maricela I.; Romero de Miguel, Aida; Gimena Ramos, Faustino; Díez Silva, H. Mauricio (2014)   Congreso / Biltzarra
    Propósito — En este artículo se analiza la adopción de prácticas del Project Management en organizaciones no gubernamentales del sector de la Cooperación al Desarrollo, y su influencia en el desempeño de los proyectos. Se ...
  • A stopband filter design using a 1-D non-periodic defected ground structure 

    Garde Irigoyen, Ieltxu Aitor; Río Bocio, Carlos del (Wiley, 2003)   Artículo / Artikulua
    The one-dimensional (1-D) defected ground structure is used to control the cutoff frequency characteristic. In this paper three non-periodic filters are built, in order to show the versatility of the DGS. Five unit cells ...
  • Modern corrugated horn antenna design for extremely low sidelobe level 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (2003)   Congreso / Biltzarra
    The present paper deals with the design of modern corrugated horn antennas for extremely low sidelobe level with the use of the well known corrugated Gaussian Profiled Horn Antenna aperture (corrugated GPHA’s) to improve ...
  • Simple modelling of DGS to design 1D-PBG low-pass filters 

    Garde Irigoyen, Ieltxu Aitor; Yábar, Miguel Javier; Río Bocio, Carlos del (Wiley, 2003)   Artículo / Artikulua
    The use of defected ground structures (DGS) is being intensively explored by the microwave filter designer community. The DGSs are one possible implementation of a 1D Photonic Band Gap (1D-PBG) where some defect structures ...
  • Choked-gaussian corrugated horn antenna design small global coverage horn antenna for TT&C with extremely low sidelobe level 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (2003)   Congreso / Biltzarra
    Extremely low sidelobe horn antennas are often required for the actual technology. This type of horn antennas are important to avoid interference with other systems. In this paper we describe a new design implementing a ...
  • Diseño de una antena dual gaussiana de doble profundidad de corrugación 

    Ortiz Pérez de Eulate, Noelia; Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (2003)   Congreso / Biltzarra
    In this paper a new design of a dual-band corrugated horn antenna is presented. The design is based on a gaussian profile to allow high pattern symmetry, low-crosspolar levels and low-side-lobes over a wide frequency range. ...
  • Diseño de filtros banda rechazada usando Defected Ground Structures (DGS) 

    Garde Irigoyen, Ieltxu Aitor; Río Bocio, Carlos del (2003)   Congreso / Biltzarra
    In this paper a type of Defected Ground Structure (DGS) is studied and used to implement filters in microstrip technology. It is first demonstrated that the main parameter which controls its operation is the external ...
  • Ultra-wide band corrugated profiled horn antenna design 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (IEEE, 2002)   Artículo / Artikulua
    Nowadays, an increasing number of applications need stable radiation patterns with low sidelobes and low crosspolar levels in a very wide bandwidth. Gaussian Profiled Horn Antennas (GPHA’s) have demonstrated its feasibility ...
  • Diseño de filtros paso bajo usando Defected Ground Structures (DGS) 

    Garde Irigoyen, Ieltxu Aitor; Río Bocio, Carlos del (2003)   Congreso / Biltzarra
    In this paper a new method of trully design of filters using Defected Ground Structures is proposed. It makes use of the model proposed in previous developments by the same authors and simplifies it to a first-order model ...
  • Conical versus gaussian profiled corrugated horn antennas 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (IEEE, 2002)   Congreso / Biltzarra
    In this paper, a study of two equal size corrugated horn antennas; a conical and a gaussian profiled horn antenna (GPHA) has been developed. It will be demonstrated that GPHA´s provide lower sidelobes and wider ...
  • Comparación entre antenas cónicas corrugadas y antenas gaussianas corrugadas 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (2002)   Congreso / Biltzarra
    In this paper, a study of two equal size corrugated horn antennas; a conical and a gaussian profiled horn antenna (GPHA) has been developed. It will be demonstrated that GPHA´s provide lower sidelobes and wider bandwidths, ...
  • Estudio de resonancias parásitas en antenas corrugadas 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (2001)   Congreso / Biltzarra
    A theoretical study reinforced with practical measurements about the origin of the return loss spikes in corrugated horn antennas is presented in this paper. These spikes are directly related to the periodic structure ...
  • Diseño y medida de una antena choke-gaussiana 

    Goñi Campión, David; Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (2002)   Congreso / Biltzarra
    A new design of corrugated horn antenna for global earth coverage from a geostationary satellite to obtain very low sidelobes and crosspolar levels with a really compact design in a quite wide bandwidth is presented in ...
  • Antena corrugada con perfil gaussiano de gran ancho de banda 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (2001)   Congreso / Biltzarra
    En este trabajo se presenta el diseño de una antena de bocina corrugada con más de un 40% de ancho de banda. Los patrones de radiación medidos coinciden muy bien con los simulados. Esta antena se puede usar en aplicaciones ...
  • Ultra-wide band corrugated gaussian profiled horn antenna design 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Río Bocio, Carlos del (IEEE, 2001)   Congreso / Biltzarra
    A corrugated horn antenna design with more than 40% bandwidth is proposed in this paper. The measured radiated field patterns have a good agreement with the simulated ones. This antenna can be used in applications that ...
  • Generation of the HE11 mode in rectangular waveguide using gaussian techniques 

    Teniente Vallinas, Jorge; Gonzalo García, Ramón; Sorolla Ayza, Mario; Río Bocio, Carlos del (IEEE, 1999)   Congreso / Biltzarra
    A new and efficient design of a rectangular corrugated waveguide mode converter, from TE10 mode in a smooth rectangular monomode waveguide to HE11 mode in a corrugated rectangular waveguide, is proposed. The main idea ...
  • Gaussian profiled horn antennas 

    Gonzalo García, Ramón; Teniente Vallinas, Jorge; Río Bocio, Carlos del (1999)   Congreso / Biltzarra
    In many different applications parameters such efficiency, gain, directivity, etc., are really critical. By using the Gaussian techniques presented here, the radiating features of existing horn antenna systems can be ...
  • Diseño de filtros en guía rectangular usando estructuras PBG's 

    Mendióroz, Luis; Martínez de Espronceda Cámara, Beatriz; Gonzalo García, Ramón; Río Bocio, Carlos del (2000)   Congreso / Biltzarra
    A new application of dielectric periodic structures (also known as PBG) to build and design waveguide filters is presented. The periodic structures have some stop frequency bands, band gaps, defined by the geometry, ...

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