ANTENNALAB  Grup d'Antenes i Sistemes Radio
http://hdl.handle.net/2117/657
Sat, 17 Dec 2016 07:01:44 GMT
20161217T07:01:44Z

High directivity fractal boundary microstrip patch antenna
http://hdl.handle.net/2117/98486
High directivity fractal boundary microstrip patch antenna
Borja Borau, Carmen; Font, G; Blanch Boris, Sebastián; Romeu Robert, Jordi
A novel patch antenna with a fractal boundary condition is proposed. Experimental and numerical results corroborate the fact that the fractal characteristic of the perimeter produces localised modes. This property is utilised in the design of a microstrip patch antenna with a measured directivity of 12.7 dB.
Fri, 16 Dec 2016 15:45:43 GMT
http://hdl.handle.net/2117/98486
20161216T15:45:43Z
Borja Borau, Carmen
Font, G
Blanch Boris, Sebastián
Romeu Robert, Jordi
A novel patch antenna with a fractal boundary condition is proposed. Experimental and numerical results corroborate the fact that the fractal characteristic of the perimeter produces localised modes. This property is utilised in the design of a microstrip patch antenna with a measured directivity of 12.7 dB.

From field experiments to salinity products: a tribute to the contributions of Jordi Font to the SMOS mission
http://hdl.handle.net/2117/98458
From field experiments to salinity products: a tribute to the contributions of Jordi Font to the SMOS mission
Camps Carmona, Adriano José; Gabarró Prats, Carolina; VallLlossera Ferran, Mercedes Magdalena; Blanch Boris, Sebastián; Aguasca Solé, Alberto; Torres Torres, Francisco; Corbella Sanahuja, Ignasi; Duffo Ubeda, Núria; Turiel Martínez, Antonio; Portabella, Marcos; Ballabrera Poy, Joaquim; González Gambau, V.; Martinez, Justino; Villarino Villarino, Ramon; Monerris Belda, Sandra; Bosch Lluis, Xavier; Sabia, Roberto; Talone, Marco; Piles Guillem, Maria; Pablos Hernánez, Miriam; Valencia Domenech, Enric
This article summarizes some of the activities in which Jordi Font, research professor and head of the Department of Physical and Technological Oceanography, Institut de Ciències del Mar (CSIC, Spanish National Research Council) in Barcelona, has been involved as coPrincipal Investigator for Ocean Salinity of the European Space Agency Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Mission from the perspective of the Remote Sensing Lab at the Universitat Politècnica de Catalunya. We have probably left out some of his many contributions to salinity remote sensing, but we hope that this review will give an idea of the importance of his work. We focus on the following issues: 1) the new accurate measurements of the sea water dielectric constant, 2) the WISE and EuroSTARRS field experiments that helped to define the geophysical model function relating brightness temperature to sea state, 3) the FROG 2003 field experiment that helped to understand the emission of sea foam, 4) GNSSR techniques for improving sea surface salinity retrieval, 5) instrument characterization campaigns, and 6) the operational implementation of the Processing Centre of Levels 3 and 4 at the SMOS Barcelona Expert Centre.
Fri, 16 Dec 2016 11:23:29 GMT
http://hdl.handle.net/2117/98458
20161216T11:23:29Z
Camps Carmona, Adriano José
Gabarró Prats, Carolina
VallLlossera Ferran, Mercedes Magdalena
Blanch Boris, Sebastián
Aguasca Solé, Alberto
Torres Torres, Francisco
Corbella Sanahuja, Ignasi
Duffo Ubeda, Núria
Turiel Martínez, Antonio
Portabella, Marcos
Ballabrera Poy, Joaquim
González Gambau, V.
Martinez, Justino
Villarino Villarino, Ramon
Monerris Belda, Sandra
Bosch Lluis, Xavier
Sabia, Roberto
Talone, Marco
Piles Guillem, Maria
Pablos Hernánez, Miriam
Valencia Domenech, Enric
This article summarizes some of the activities in which Jordi Font, research professor and head of the Department of Physical and Technological Oceanography, Institut de Ciències del Mar (CSIC, Spanish National Research Council) in Barcelona, has been involved as coPrincipal Investigator for Ocean Salinity of the European Space Agency Soil Moisture and Ocean Salinity (SMOS) Earth Explorer Mission from the perspective of the Remote Sensing Lab at the Universitat Politècnica de Catalunya. We have probably left out some of his many contributions to salinity remote sensing, but we hope that this review will give an idea of the importance of his work. We focus on the following issues: 1) the new accurate measurements of the sea water dielectric constant, 2) the WISE and EuroSTARRS field experiments that helped to define the geophysical model function relating brightness temperature to sea state, 3) the FROG 2003 field experiment that helped to understand the emission of sea foam, 4) GNSSR techniques for improving sea surface salinity retrieval, 5) instrument characterization campaigns, and 6) the operational implementation of the Processing Centre of Levels 3 and 4 at the SMOS Barcelona Expert Centre.

Design of single shaped reflector antennas for synthesis of shaped contour beams using genetic algorithms
http://hdl.handle.net/2117/98391
Design of single shaped reflector antennas for synthesis of shaped contour beams using genetic algorithms
VallLlossera Ferran, Mercedes Magdalena; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; Cardama Aznar, Ángel
A genetic algorithm (GA) has been developed for designing singleshaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation patterns very efficiently. Results comparing with the classical conjugate gradient are included to provide validation. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 358–361, 2000.
Thu, 15 Dec 2016 18:07:57 GMT
http://hdl.handle.net/2117/98391
20161215T18:07:57Z
VallLlossera Ferran, Mercedes Magdalena
Rius Casals, Juan Manuel
Duffo Ubeda, Núria
Cardama Aznar, Ángel
A genetic algorithm (GA) has been developed for designing singleshaped reflector antennas for the synthesis of shaped contour beams. The graphical processing technique is used in order to obtain the antenna radiation patterns very efficiently. Results comparing with the classical conjugate gradient are included to provide validation. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 358–361, 2000.

The Koch monopole: a small fractal antenna
http://hdl.handle.net/2117/98367
The Koch monopole: a small fractal antenna
Puente Baliarda, Carles; Romeu Robert, Jordi; Cardama Aznar, Ángel
Fractal objects have some unique geometrical properties. One of them is the possibility to enclose in a finite area an infinitely long curve. The resulting curve is highly convoluted being nowhere differentiable. One such curve is the Koch curve. In this paper, the behavior the Koch monopole is numerically and experimentally analyzed. The results show that as the number of iterations on the small fractal Koch monopole are increased, the Q of the antenna approaches the fundamental limit for small antennas.
Thu, 15 Dec 2016 15:34:42 GMT
http://hdl.handle.net/2117/98367
20161215T15:34:42Z
Puente Baliarda, Carles
Romeu Robert, Jordi
Cardama Aznar, Ángel
Fractal objects have some unique geometrical properties. One of them is the possibility to enclose in a finite area an infinitely long curve. The resulting curve is highly convoluted being nowhere differentiable. One such curve is the Koch curve. In this paper, the behavior the Koch monopole is numerically and experimentally analyzed. The results show that as the number of iterations on the small fractal Koch monopole are increased, the Q of the antenna approaches the fundamental limit for small antennas.

Dual band fss with fractal elements
http://hdl.handle.net/2117/98359
Dual band fss with fractal elements
Romeu Robert, Jordi; RahmatSamii, Y
Experimental and computed results of a frequency selective surface (FSS) based on a certain type of fractal element are presented. The fractal element is a two iteration Sierpinski gasket dipole. Owing to the dual band behaviour of the two iteration Sierpinski gasket dipole, two stopbands are exhibited within the operating frequency band. This behaviour is obtained by arraying one simple element in a single layer frequency selective surface (FSS)
Thu, 15 Dec 2016 15:03:19 GMT
http://hdl.handle.net/2117/98359
20161215T15:03:19Z
Romeu Robert, Jordi
RahmatSamii, Y
Experimental and computed results of a frequency selective surface (FSS) based on a certain type of fractal element are presented. The fractal element is a two iteration Sierpinski gasket dipole. Owing to the dual band behaviour of the two iteration Sierpinski gasket dipole, two stopbands are exhibited within the operating frequency band. This behaviour is obtained by arraying one simple element in a single layer frequency selective surface (FSS)

Infrared thermograms applied to nearfield testing
http://hdl.handle.net/2117/98358
Infrared thermograms applied to nearfield testing
González, J.M.; Aguasca Solé, Alberto; Romeu Robert, Jordi
Electromagnetic fields close to radiant structures can be measured quickly using an infrared camera. Examples of induced fields by wire antennas over a detection screen at distances shorter than one wavelength are presented. The measured thermograms agree with simulations that take into account heat propagation on the detection screen
Thu, 15 Dec 2016 14:57:20 GMT
http://hdl.handle.net/2117/98358
20161215T14:57:20Z
González, J.M.
Aguasca Solé, Alberto
Romeu Robert, Jordi
Electromagnetic fields close to radiant structures can be measured quickly using an infrared camera. Examples of induced fields by wire antennas over a detection screen at distances shorter than one wavelength are presented. The measured thermograms agree with simulations that take into account heat propagation on the detection screen

Multilevel matrix decomposition algorithm for analysis of electrically large electromagnetic problems in 3d
http://hdl.handle.net/2117/98353
Multilevel matrix decomposition algorithm for analysis of electrically large electromagnetic problems in 3d
Rius Casals, Juan Manuel; Parrón Granados, Josep; Úbeda Farré, Eduard; Mosig, J R
The multilevel matrix decomposition algorithm (MLMDA) has been implemented in 3D for the solution of large electromagnetic problems. The electric field integral equation is solved for arbitrary surfaces discretized using N Rao, Wilton, and Glisson basis functions. The MLMDA accelerates the matrix–vector products in a conjugate gradient or biconjugate gradient iterative solution of the resulting system of equations. The computational cost of each iteration is proportional to N¿log2¿N for very large problems, and is particularly small for planar or piecewise planar objects. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 177–182, 1999.
Thu, 15 Dec 2016 14:42:04 GMT
http://hdl.handle.net/2117/98353
20161215T14:42:04Z
Rius Casals, Juan Manuel
Parrón Granados, Josep
Úbeda Farré, Eduard
Mosig, J R
The multilevel matrix decomposition algorithm (MLMDA) has been implemented in 3D for the solution of large electromagnetic problems. The electric field integral equation is solved for arbitrary surfaces discretized using N Rao, Wilton, and Glisson basis functions. The MLMDA accelerates the matrix–vector products in a conjugate gradient or biconjugate gradient iterative solution of the resulting system of equations. The computational cost of each iteration is proportional to N¿log2¿N for very large problems, and is particularly small for planar or piecewise planar objects. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 177–182, 1999.

Shaped reflector antenna analysis by graphical processing methods
http://hdl.handle.net/2117/98272
Shaped reflector antenna analysis by graphical processing methods
Rius Casals, Juan Manuel; VallLlossera Ferran, Mercedes Magdalena; Salazar, C; Cardama Aznar, Ángel
Wed, 14 Dec 2016 16:27:03 GMT
http://hdl.handle.net/2117/98272
20161214T16:27:03Z
Rius Casals, Juan Manuel
VallLlossera Ferran, Mercedes Magdalena
Salazar, C
Cardama Aznar, Ángel

El plan nacional de la calidad de las universidades. Los objetivos del plan: evaluacion para mejorar
http://hdl.handle.net/2117/98268
El plan nacional de la calidad de las universidades. Los objetivos del plan: evaluacion para mejorar
Jofre Roca, Lluís; Vilalta, Josep Ma
Wed, 14 Dec 2016 16:08:38 GMT
http://hdl.handle.net/2117/98268
20161214T16:08:38Z
Jofre Roca, Lluís
Vilalta, Josep Ma

Active zone selfsimilarity of fractal sierpinski antenna verified using infrared thermograms
http://hdl.handle.net/2117/98239
Active zone selfsimilarity of fractal sierpinski antenna verified using infrared thermograms
González, J.M.; Navarro Bernal, Manuel; Puente Baliarda, Carles; Romeu Robert, Jordi; Aguasca Solé, Alberto
The surface current distribution of a Sierpinski fractal antenna shows a selfsimilar behaviour determined by the selfsimilar properties of its geometry. The application of infrared thermography to electromagnetic near field detection allows the experimental verification of the active region scaling of a fractal antenna operating at different bands.
Wed, 14 Dec 2016 14:58:59 GMT
http://hdl.handle.net/2117/98239
20161214T14:58:59Z
González, J.M.
Navarro Bernal, Manuel
Puente Baliarda, Carles
Romeu Robert, Jordi
Aguasca Solé, Alberto
The surface current distribution of a Sierpinski fractal antenna shows a selfsimilar behaviour determined by the selfsimilar properties of its geometry. The application of infrared thermography to electromagnetic near field detection allows the experimental verification of the active region scaling of a fractal antenna operating at different bands.