Exploració per tema "Microwave antennas"

Ara es mostren els items 21-40 de 147

    • Antenna input impedance measurement using multi-load MST 

      Romeu Robert, Jordi; Capdevila Cascante, Santiago; Bolomey, Jean Charles; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents the practical use of modulated scatterer technique (MST) for the measurement of the antenna input impedance using a multi-load automatic switching device, and it also includes the analysis of the ...

    • Antenna microstrip miniatura y de alta directividad basada en el fractal de Sierpinski 

      Puente Baliarda, Carles; Borja Borau, M. Carmen; Anguera Pros, Jaume (Unión Científica Internacional de Radio (URSI), 2011)
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      Accés restringit per política de l'editorial
      he unique geometrical properties of fractals have been proven to be useful to design advanced antennas. Enhanced performance in terms of size, gain or multifre- quency behaviour is observed in fractal-shaped antennas. Here, ...

    • Antenna microstrip triplebanda basada en el triangulo fractal de Sierpinski 

      Anguera Pros, Jaume; Martínez, Enrique; Puente Baliarda, Carles; Borja, C.; Soler, Jordi (UPV, 2005)
      Text en actes de congrés
      Accés obert

    • Antenna subset selection for spatial modulation: a novel and energy efficient single RF technique 

      Ntontin, Konstantinos; Di Renzo, Marco; Pérez Neira, Ana Isabel; Verikoukis, Christos (2013)
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      Accés restringit per política de l'editorial
      In this paper, we propose a closed-loop and single RF multiple-input-multiple-output (MIMO) method, particularly suitable for the Uplink of cellular systems, which is based on the low-complexity and recently devised method ...

    • Antenna system for a Mars spacesuit simulator 

      Claramunt Codinas, Marc (Universitat Politècnica de Catalunya, 2020-07)
      Treball Final de Grau
      Accés obert
      Space exploration is constantly pushing the limits of the existing technology, overcoming the challenges it proposes is a human exercise that expands our scientific knowledge and technological capacities. This industry ...

    • Application of the conjugate gradient method to a self-matching network for industrial microwave heating antennas 

      Mallorquí Franquet, Jordi Joan; Aguasca Solé, Alberto; Cardama Aznar, Ángel; Pages, R; Haro, J M (Institute of Electrical and Electronics Engineers (IEEE), 1999)
      Text en actes de congrés
      Accés obert
      One of the main problems regarding the efficiency in a heating industrial system using high power microwaves is related with the uncontrolled changes on the load. These changes can be caused both by the different kinds of ...

    • Assessment of 3-D printing technologies for millimeter-wave reflectors 

      Romeu Robert, Jordi; Blanch Boris, Sebastián; Vidal, Neus; Lopez-Villegas, Jose Maria; Aguasca Solé, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-20)
      Article
      Accés obert
      Three different 3D printing technologies: Stereolithography (SLA), Fused Deposition Modeling (FDM) and HP Multi Jet Fusion Technology (MJF) are compared to build a parabolic reflector operating at 100 GHz. Fabrication ...

    • Assessment of mmwave handset arrays in the presence of the user body 

      Ballesteros Sánchez, Christian; Vähä-Savo, Lauri; Haneda, Katsuyuki; Icheln, Clemens; Romeu Robert, Jordi; Jofre Roca, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
      Article
      Accés obert
      The emergence of mobile terminals operating at millimeter-wave frequencies necessitates the ability to evaluate the effect the environment, and in particular, users have on their radiation properties. Some studies evaluated ...

    • Broadband triple-frequency microstrip patch radiator combining a dual-band modified Sierpinski fractal and monoband antenna 

      Anguera, Jaume; Martinez-Ortigosa, Eduard; Puente Baliarda, Carles; Borja, C.; Soler, Jordi (2006-11)
      Article
      Accés restringit per política de l'editorial
      Abstract—A triple-frequency antenna combining a dual-band and a monoband antenna with broadside radiation patterns is presented. The dual-band antenna is inspired in the Sierpinski fractal. Such a dual-band antenna is ...

    • Caracterización de la densidad de los cultivos en tiempo real con técnicas de radar de microondas 

      Giménez Colom, Pol (Universitat Politècnica de Catalunya, 2023-05-25)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • Channel characterization for chip-scale wireless communications within computing packages 

      Timoneda i Comas, Xavier; Cabellos Aparicio, Alberto; Manessis, Dionyssios; Alarcón Cot, Eduardo José; Abadal Cavallé, Sergi (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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      Wireless Network-on-Chip (WNoC) appears as a promising alternative to conventional interconnect fabrics for chip-scale communications. WNoC takes advantage of an overlaid network composed by a set of millimeter-wave antennas ...

    • Characterization and evaluation of human liver Phantoms for normal and malignant tissue 

      Alonso Rincón, Elena (Universitat Politècnica de Catalunya, 2016-05-12)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   Technische Universität Darmstadt

    • Closed-loop spatial modulation with antenna selection 

      Wang, Jun-ling; Pérez Neira, Ana Isabel; Zhang, Q.; Meiguo, Gao; Xiaoyan, Bian (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The closed-loop scheme of spatial modulation (SM), which feeds back the selected transmit antenna subsets to the transmitter, is presented to overcome the constraint in SM that the number of transmit antennas has to be a ...

    • Compact closed-form expressions for the propagation parameters of a finite ground width coplanar transmission waveguide with thick electrodes 

      Ibarra Fusté, Jose Antonio; Santos Blanco, M. Concepción; Rodríguez Rodríguez, Enric (2012-02-21)
      Article
      Accés restringit per política de l'editorial
      Compact closed-form mathematical expressions are presented for the effective permittivity, characteristic impedance and attenuation constant of coplanar waveguides with thick electrodes and high-frequency dispersion. ...

    • Compact multiband antenna system for smartphone platforms 

      Anguera Pros, Jaume; Picher, Cristina; Andújar Linares, Aurora; Puente Baliarda, Carles; Kahng, Sungtek (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Smartphone are gainin interest due to its multifunctional capabilities. In order to facilitate the integration of an antenna system, a compact radiating system comprising non-resonant cubic elements radiating to provide ...

    • Compact optoantennas for millimeter-wave wireless applications 

      Higón Sorribes, José Miguel (Universitat Politècnica de Catalunya, 2020-11-27)
      Projecte Final de Màster Oficial
      Accés obert
      Nowadays there are a lot of applications that request high bandwidth (due to the data that they transport) and high speed of transmission , for example, 5G technology or Video-based applications. The use of photonic systems ...

    • Computing and communications for the software-defined metamaterial paradigm: a context analysis 

      Abadal Cavallé, Sergi; Liaskos, Christos; Tsioliaridou, Ageliki; Ioannidis, Sotiris; Pitsillides, Andreas; Solé Pareta, Josep; Alarcón Gallo, Eduardo; Cabellos Aparicio, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2017-01-01)
      Article
      Accés obert
      Metamaterials are artificial structures that have recently enabled the realization of novel electromagnetic components with engineered and even unnatural functionalities. Existing metamaterials are specifically designed ...

    • Conformación del diagrama de radiación de un monopolo en L 

      Andújar Linares, Aurora; Anguera Pros, Jaume; Puente Baliarda, Carles; Picher, Cristina (Unión Científica Internacional de Radio (URSI), 2009)
      Text en actes de congrés
      Accés obert
      The typical radiation pattern of an L-monopole antenna can be easily modified by changing the geometrical characteristics of the structure. To shape a specific radiation pattern through a basic structure becomes an interesting ...

    • Correlated multiple antennas spectrum sensing under calibration uncertainty 

      Pourgharehkhan, Zahra; Taherpour, Abbas; Sala Álvarez, José; Khattab, Tamer (2015-12-01)
      Article
      Accés obert
      We address the problem of spectrum sensing in cognitive radios (CRs) when the secondary user (SU) is equipped with a multiantenna receiver. We consider scenarios with correlation between the received channels at different ...

    • CPW balun for printed balanced antennas 

      Sanchez, Albert Miquel; Ribó, Miquel; Pradell i Cara, Lluís; Anguera Pros, Jaume; Andujar, Aurora (Institution of Electrical Engineers, 2014-05-22)
      Article
      Accés restringit per política de l'editorial
      In coplanar waveguide (CPW) circuits, printed balanced antennas must be excited through baluns. These baluns often feature coplanar-to-slotline transitions that must be tuned and matched by electromagnetic optimisation, ...