Exploració per autor "Jofre Roca, Lluís"
Ara es mostren els items 226-245 de 254
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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 obertA 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 obertA 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 obertThe 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
Accés obertA 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'editorialTerahertz 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'editorialTHz 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 obertA 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'editorialThe 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 obertPreliminary 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
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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 obertThe 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 obertMicrowave 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'editorialThis 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 obertA 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'editorialMicrowave 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 obertSteel 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 obertCylindrical 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'editorialA 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 ...