Ara es mostren els items 226-245 de 254

    • Target spinor calibration (TSC) for polarimetric radar cross-section measurements 

      Fabregas Canovas, Francisco Javier; Romeu Robert, Jordi; Broquetas Ibars, Antoni; Jofre Roca, Lluís (IEE-INST ELEC ENG, 1995-09-01)
      Article
      Accés obert
      A new polarimetric calibration method is proposed based on scattering matrix decomposition, via Pauli matrices. This scheme operates with the Pauli target vectors instead of the scattering matrix. The base elements of the ...
    • Technology assessment of aperture coupled slot antenna array in Groove Gapwaveguide for 5G millimeter wave applications 

      Zhou, Ivan; Jofre Roca, Lluís; Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Article
      Accés obert
      A compact triple-layer series fed slot unit array using Groove Gap Waveguide (GGW) technology for 5G millimeter-wave applications is presented in this paper. The design employed a two-step coupling mechanism for the radiating ...
    • Temperature and permittivity measurements using a cylindrical microwave imaging system 

      Broquetas Ibars, Antoni; Ferrando Bataller, Miquel; Rius Casals, Juan Manuel; Jofre Roca, Lluís; de los Reyes, Elías; Cardama Aznar, Ángel; Elias Fusté, Antoni; Ibáñez, Juan (Institute of Electrical and Electronics Engineers (IEEE), 1987)
      Text en actes de congrés
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    • Terahertz frequency-scaled differential imaging for Sub-6 GHz vehicular antenna signature analysis 

      Solano-Sanchez, Jose-Antonio; Martinez-Ingles, Maria-Teresa; Molina García-Pardo, José María; Romeu Robert, Jordi; Jofre Roca, Lluís; Ballesteros Sánchez, Christian; Rodriguez, Jose-Victor; Mateo-Aroca, Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-02)
      Article
      Accés obert
      The next generation of connected and autonomous vehicles will be equipped with high numbers of antennas operating in a wide frequency range for communications and environment sensing. The study of 3D spatial angular responses ...
    • Teraherz subsurface imaging system 

      Nova, Enrique; Abril, Jordi; Guardiola Garcia, Marta; Capdevila Cascante, Santiago; Broquetas Ibars, Antoni; Romeu Robert, Jordi; Jofre Roca, Lluís (2010)
      Text en actes de congrés
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      A subsurface imaging system based on a terahertz time-domain spectrometer (THz-TDS) is described in this paper. The system performance has been simulated in terms of spatial resolution, penetration capabilities and SNR. ...
    • The state of art of terahertz sources: a communication perspective at a glance 

      Yazgan, Ayhan; Jofre Roca, Lluís; Romeu Garbí, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Terahertz band lying between infrared and microwave is a very promising part of electromagnetic spectrum for spectroscopy, space applications and different kind of imaging applications such as medical and security. Recently, ...
    • The “challenging” world of Terahertz radiation and imaging 

      Jofre Roca, Lluís; Romeu Robert, Jordi; Capdevila Cascante, Santiago; Abril, Jordi; Nova, Enrique; Alonso, Maria (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      THz propagation through materials may reveal unique macroscopic and physical properties of their internal structure without the damage associated with ionizing radiation. The generation, radiation, and detection of THz ...
    • 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
      Accés obert
      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 ...
    • Three-dimensional microfabricated broadband patch antenna for wiGig applications 

      Mopidevi, Hema Swaroop; Hurneli, H. V.; Cagatay, E.; Biyikli, N.; Imbert Villà, Marc; Romeu Robert, Jordi; Jofre Roca, Lluís; Cetiner, Bedri Artug (2014-01-01)
      Article
      Accés restringit per política de l'editorial
      The design, microfabrication, and characterization of a broadband patch antenna capable of covering the entire IEEE 802.11ad (WiGig) frequency band (57-66 GHz) are presented in this letter. A conductor-backed (CB) coplanar ...
    • Time domain reflection technique for microwave non destructive testing of steel fiber reinforced concrete 

      Roqueta Crusats, Gemma; Romeu Robert, Jordi; Jofre Roca, Lluís (2010)
      Text en actes de congrés
      Accés obert
      Preliminary results of a time domain reflection approach for the non-destructive testing of Steel Fiber Reinforced Concrete (SFRC) are presented in this paper. An open-ended epoxy-filled waveguide and a reflector plate ...
    • Tomografía activa por microondas aplicada a la termografía en la monitorización de tratamientos de hipertemia 

      Martín, J.; Mallorquí Franquet, Jordi Joan; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1990)
      Text en actes de congrés
      Accés obert
    • Tomografía activa por microondas aplicada a la termografía en la monitorización de tratamientos de hipertermia 

      Mallorquí Franquet, Jordi Joan; Broquetas Ibars, Antoni; Jofre Roca, Lluís (1990)
      Text en actes de congrés
      Accés obert
      The paper presents a numerical simulation and experimental evaluation of active microwave monitoring of temperature changes induced in human pelvis and thorax during hyperthermia treatments of cancer.
    • Tomografía de microondas: algoritmos en coordenadas cilíndricas 

      Rius Casals, Juan Manuel; Baquero, M; Romeu Robert, Jordi; Ferrando Bataller, Miquel; Jofre Roca, Lluís; de los Reyes, Elías; Elias Fusté, Antoni (Unión Científica Internacional de Radio (URSI), 1986)
      Text en actes de congrés
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    • Tomografía de microondas: reconstrucción de objetos con pérdidas en geometrías cilíndricas 

      Rius Casals, Juan Manuel; Broquetas Ibars, Antoni; Ferrando Bataller, Miquel; Cardama Aznar, Ángel; Jofre Roca, Lluís (Unión Científica Internacional de Radio (URSI), 1987)
      Text en actes de congrés
      Accés obert
      Microwave diffraction tomography allows to obtain a cross-sectional image of the dielectric properties of an object, from the scattering of an incident microwave radiation. This paper presents a computational study of an ...
    • Tomographic imaging retina at 100 GHz 

      Alonso, Maria; Garg, V; Romeu Robert, Jordi; Llombart, Nuria; Jofre Roca, Lluís (IEEEXPLORE, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents a tomographic system at 100 GHz for imaging based on MST technique. At 100 GHz, a good compromise is obtained between penetration and reso- lution for biomedical and non-destructive testing ...
    • Toward 3D UWB tomographie imaging system for breast tumor detection 

      Guardiola Garcia, Marta; Jofre Roca, Lluís; Capdevila Cascante, Santiago; Blanch Boris, Sebastián; Romeu Robert, Jordi (2010)
      Text en actes de congrés
      Accés obert
      A novel 3D tomographic algorithm for short range cylindrical geometries using UWB frequency range is presented. The algorithm has been applied to breast tumor detection, nevertheless, its non application-specific character ...
    • Towards microwave system for real-time medical imaging 

      Guardiola Garcia, Marta; Buitrago Ventura, Santiago; Romeu Robert, Jordi; Jofre Roca, Lluís (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Microwave tomography is proposed for medical diagnosis using Magnitude Combined tomographic algorithm. A proof-of-concept experimental system was build and an in-homogeneous breast phantom with a tumor embedded was ...
    • Transmission Approach for Near-Field Non Destructive Characterization of Steel Fiber Reinforcd Concrete at Microwave Frequencies 

      Roqueta Crusats, Gemma; Romeu Robert, Jordi; Jofre Roca, Lluís (2009)
      Text en actes de congrés
      Accés obert
      Steel Fiber-Reinforcement is a way to strengthen concrete structures which results to be more flexible and less expensive than the conventional hand-tied rebars, while still increasing the tensile strength. In order to ...
    • Truncation errors in cylindrical near to far field transform. A plane wave synthesis approach 

      Romeu Robert, Jordi; Jofre Roca, Lluís (. 22ND EUROPEAN MICROWAFE CONFERENCE, 1992)
      Text en actes de congrés
      Accés obert
      Cylindrical Near to far field antenna transformation is expressed as a plane wave synthesis problem where a plane wave is produced by a cylindrical current distribution that encloses the Antenna Under Test (AUT). The current ...
    • Unit cell for frequency-tunable beamscanning reflectarrays 

      Rodrigo López, Daniel; Jofre Roca, Lluís; Perruisseau Carrier, Julien (2013-12)
      Article
      Accés restringit per política de l'editorial
      A reflectarray cell able to dynamically control the reflection phase at a variable frequency is presented. This capability enables beam-scanning reflectarrays with frequency reconfigurability, which is a novel capability ...