Exploració per autor "Flaviis, Franco de"

Ara es mostren els items 1-8 de 8

    • 60GHz channel characterization using a Scatterer Mapping Technique 

      Papió, Anna; Grau, Alfred; Balcells Ventura, Jordi; Romeu Robert, Jordi; Jofre Roca, Lluís; Flaviis, Franco de (2010)
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      In this paper, a Scatterer Mapping Technique based on a Multi-Frequency Bi-focusing operator with good imaging capabilities is used to characterize the 60GHz wireless channel in an office environment. The measurement data ...

    • Dual-band Butler matrix for WLAN systems 

      Collado Gómez, Juan Carlos; Grau Besolí, Alfred; Flaviis, Franco de (Institute of Electrical and Electronics Engineers, 2005)
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      This paper shows the design of a dual-band Butler matrix aimed to cover the bands corresponding to the standards IEEE802.11a/b, with particular interest in WLAN systems, at the 2.4 GHz and 5 GHz bands. Measurements of the ...

    • Dual-band planar quadrature hybrid with enhanced bandwidth response 

      Collado Gómez, Juan Carlos; Grau Besolí, Alfred; Flaviis, Franco de (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-01-31)
      Article
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      This paper presents the theory, design procedure, and implementation of a dual-band planar quadrature hybrid with enhanced bandwidth. The topology of the circuit is a three-branch-line (3-BL) quadrature hybrid, which ...

    • Microwave reflection tomographic array for damage detection of civil structures 

      Kim, Yoo Jin; Jofre Roca, Lluís; Flaviis, Franco de; Feng, Maria Q. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-11-30)
      Article
      Accés obert
      Microwave tomographic imaging technology using a bifocusing operator has been developed in order to detect the internal voids/objects inside concrete structures. The imaging system consists of several cylindrical or ...

    • Miniature multi-element antenna for wireless communications 

      Jofre Roca, Lluís; Cetiner, Bedri Artug; Flaviis, Franco de (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-05-31)
      Article
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      We present a novel broad-band miniature antenna and employ it in a multi-element geometry with diversity capabilities for wireless communications. This antenna (diameter < 0.2 λ and thickness < 0.06 λ) consists of two ...

    • Novel design methodology of matching networks based on the use of simmetry operators 

      Grau, Alfred; Romeu Robert, Jordi; Jofre Roca, Lluís; Flaviis, Franco de (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06)
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    • Optimization of linear multielement antennas for selection combining by means of a Butler matrix in different MIMO environments 

      Grau Besolí, Alfred; Romeu Robert, Jordi; Blanch Boris, Sebastián; Jofre Roca, Lluís; Flaviis, Franco de (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-11-30)
      Article
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      An optimized linear multielement antenna (MEA) is presented for selection combining schemes that improves the selection diversity gain and selection diversity capacity in medium and low multipath environments, with ...

    • Small-size broadband multi-element antenna for RF/wireless systems 

      Cetiner, Bedri Artug; Jofre Roca, Lluís; Qian, J. Y.; Flaviis, Franco de (IEEE, 2003-10-31)
      Article
      Accés obert
      We present a small-size broadband antenna specifically designed for integration with RF/wireless communication systems. The antenna is built on a printed circuit board and fed by a coplanar waveguide (CPW) to allow further ...