Exploració per autor "Jofre Roca, Lluís"
Ara es mostren els items 245-254 de 254
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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 ... -
Utilización de una formulación espectral en la reconstrucción de objetos en microondas
Jofre Roca, Lluís; Cardama Aznar, Ángel; Bolomey, Jean Charles (Universidad de Cantabria, 1982)
Text en actes de congrés
Accés obertA method is presented here for two or three dimensional reconstruction of objects surrounded by homogeneous medium from the measurement of the scattered field. -
UWB High-contrast robust tomographic imaging for medical applications
Guardiola Garcia, Marta; Capdevila Cascante, Santiago; Blanch Boris, Sebastián; Romeu Robert, Jordi; Jofre Roca, Lluís (2009)
Text en actes de congrés
Accés obertIn this paper a complete UWB Circular Tomographic System robust to high contrast or large objects, applied to Breast Tumor Detection, is presented. The main contribution of this paper is to focus on the implementation ... -
UWB Magnitude combined realistic breast model imaging capabilities
Guardiola Garcia, Marta; Jofre Roca, Lluís; Romeu Robert, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2012)
Text en actes de congrés
Accés restringit per política de l'editorialBreast cancer is the leading cancer killer among women. Early stage detection has been recognized to be best solution to reduce mortality rates. A non-ionizing, economical screening system based on microwave imaging is ... -
UWB MST MEMS-based near-field imaging system
Capdevila Cascante, Santiago; Jofre Cruanyes, Marc; Rodríguez, J.; Guardiola Garcia, Marta; Papió, Anna; de Flaviis, Franco; Jofre Roca, Lluís (2008)
Text en actes de congrés
Accés obertIn this paper a new family of illuminators and MST measurement architectures is presented and the di erent aspects are studied. -
UWB-modulated microwave imaging for human brain functional monitoring
Akazzim, Youness; Jofre Cruanyes, Marc; El Mrabet, Otman; Romeu Robert, Jordi; Jofre Roca, Lluís (Multidisciplinary Digital Publishing Institute (MDPI), 2023-04-28)
Article
Accés obertMorphological microwave imaging has shown interesting results on reconstructing biological objects inside the human body, and these parameters represent their actual biological condition, but not their biological activity. ... -
Variable capacitive antenna loading for embedded RFID sensors
Gonzalez, Giselle; Jofre Roca, Lluís; Romeu Robert, Jordi; Cairó Molins, Josep Ignasi (Institute of Electrical and Electronics Engineers (IEEE), 2019)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, a self-adaptive folded dipole antenna to work embedded in media with changing physical and chemical properties for RFID applications is proposed. Self-adaptability is provided by taking advantage of the ... -
W-band radiometric imager with mechanical beam-scanning
Nova, Enrique; Abril, Jordi; Romeu Robert, Jordi; Broquetas Ibars, Antoni; Torres Torres, Francisco; Jofre Roca, Lluís (IEEE, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialThe design of a 94 GHz Total Power Radiometer system for imaging purposes is presented in this paper. A mechanical beam-scanning antenna system is used to acquire passive raster images. The main performance parameters ... -
Wireless sensing of concrete setting process
González López, Giselle; Romeu Robert, Jordi; Cairó, Ignasi; Segura Pérez, Ignacio; Ikumi Montserrat, Tai; Jofre Roca, Lluís (Multidisciplinary Digital Publishing Institute (MDPI), 2020-10-21)
Article
Accés obertAn RFID-based wireless system to measure the evolution of the setting process of cement-based materials is presented in this paper. The system consists of a wireless RFID temperature sensor that works embedded in concrete, ... -
X-parameters based characterization of PIN diodes for reconfigurable antenna assessment
Ramírez Arroyave, Germán Augusto; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís; Jofre Roca, Lluís (Íñigo Cuiñas Gómez, 2021)
Text en actes de congrés
Accés restringit per política de l'editorialThis contribution presents the non-linear characterization up to 50 GHz of a PIN diode commonly used as switch for reconfigurable devices at microwave applications. Non-linear models are extracted by means of X-parameter ...