Exploració per autor "Rius Casals, Juan Manuel"
Ara es mostren els items 87-106 de 223
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Facet-oriented discretization of the electric-magnetic field integral equation for the accurate scattering analysis of perfectly conducting sharp-edged objects
Tamayo Palau, José María; Úbeda Farré, Eduard; Rius Casals, Juan Manuel (2011)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, we present the discretization in Method of Moments of the Electric-Magnetic Field Equation with the divergence-Taylor-Orthogonal basis functions, a facetoriented set of basis functions. We show for a ... -
Fast algorithms for radar cross section computation of complex objects
Rius Casals, Juan Manuel; Vall-Llossera Ferran, Mercedes Magdalena; Ferrando, M. (Centre national d'études des télécommunications (CNET), 1990)
Text en actes de congrés
Accés obertRadar cross section (RCS) of complex targets can be obtained in real time using the hardware capabilities of a high performance graphic workstation. Target geometry is modelled by a computer-aided design package. First ... -
Fast analysis and optimization of sparsely distributed partial modification problems
Fang, Xiaoxing; Heldring, Alexander; Rius Casals, Juan Manuel; Cao, Qunsheng (Institute of Electrical and Electronics Engineers (IEEE), 2022-08)
Article
Accés obertThis article addresses the efficient numerical analysis of sparsely distributed small modifications in a large structure, that is, the sparsely distributed partial modification problem (SDPMP). A hierarchical matrix ... -
Fast and Accurate Computation of Hypersingular Integrals in Galerkin Surface Integral Equation Formulations via the Direct Evaluation Metho
Polimeridis, Athanasios G.; Tamayo Palau, José María; Rius Casals, Juan Manuel; Mosig, Juan Ramón (2011-04)
Article
Accés restringit per política de l'editorialHypersingular 4-D integrals, arising in the Galerkin discretization of surface integral equation formulations, are computed by means of the direct evaluation method. The proposed scheme extends the basic idea of the ... -
Fast direct solution of method of moments linear system
Heldring, Alexander; Rius Casals, Juan Manuel; Tamayo Palau, José María; Parrón Granados, Josep; Úbeda Farré, Eduard (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-11)
Article
Accés obertA novel algorithm, the compressed block decomposition (CBD), is presented for highly accelerated direct (non iterative) method of moments (MoM) solution of electromagnetic scattering and radiation problems. The algorithm ... -
Fast direct solution of the combined field integral equation
Heldring, Alexander; Tamayo Palau, José María; Rius Casals, Juan Manuel (2010)
Text en actes de congrés
Accés obertThe Method of Moments for electromagnetic scattering and radiation problems is often used in conjunction with the EFIE because the EFIE allows the analysis of open surfaces. For electrically large closed surfaces, the ... -
Fast shadowing computation in physical optics surface
Rius Casals, Juan Manuel; Carbo, Alex; Úbeda Farré, Eduard; Heldring, Alexander (2013)
Text en actes de congrés
Accés restringit per política de l'editorialGRECO code has been updated by replacing the graphical processing technique for computation of Physical Optics surface integral by a hybrid CPU-graphical processing approach. The resulting code needs more CPU power for ... -
Figure of merit for multiband antennas
Rius Casals, Juan Manuel; Santos Blanco, M. Concepción; Parrón Granados, Josep (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-11-30)
Article
Accés obertThis communication defines a figure of merit for multiband antennas that gives an objective quantification of the similarities between radiation patterns at the different antenna operating bands. -
Fourier analysis of submillimeter-wave scattering from the human cornea
Zarrinkhat, Faezeh; Lamberg, Joel; Tamminen, Aleksi; Baggio, Mariangela; Ala-Laurinaho, Juha; Khaled, Elsayed E. M.; Rius Casals, Juan Manuel; Romeu Robert, Jordi; Taylor, Zachary (Institute of Electrical and Electronics Engineers (IEEE), 2021)
Text en actes de congrés
Accés obertWave scattering from a human cornea illuminated with a submillimeter-wave Gaussian beam is explored with Fourier analysis. This new approach enabled us to investigate the cornea as a coated sphere rather than a homogenized ... -
Frequency extrapolation in the integral equation mei
Rius Casals, Juan Manuel; Carpintero, C Pérez; Cardama Aznar, Ángel; Mosig, J R (Institution of Electrical Engineers, 1996-12)
Article
Accés obertAn algorithm to extrapolate in frequency the matrix coefficients of the IE-MEI method is presented. This results in a total operation count to compute the induced current in electromagnetic scattering problems proportional ... -
Frequency extrapolation of IE-MEI linear system Coefficients in 2D
Rius Casals, Juan Manuel; Heldring, Alexander; Úbeda Farré, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2017)
Text en actes de congrés
Accés restringit per política de l'editorialThe Integral Equation MEI (IE-MEI) method for the sparsification of Method of Moments linear system matrix is revisited here. It achieves cpu computation time and storage memory requirements of order O(N ) (for 2D perfectly ... -
GA design of small thin-wire antennas: comparison with Sierpinski-type prefractal antennas
Fernández Pantoja, Mario; García Ruíz, Francisco Javier; Rubio Bretones, Amelia C.; González García, S.; Gómez Martín, Rafael A.; González Arbesú, José María; Romeu Robert, Jordi; Rius Casals, Juan Manuel; Werner, P. L.; Werner, Douglas H. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2006-06-30)
Article
Accés obertA new set of genetically generated electrically small thin-wire antennas with a better performance than that of several families of Sierpinsky prefractal monopoles of the same electrical size at resonance is presented -
GA design of wire pre-fractal antennas and comparison with other Euclidean geometries
Fernández Pantoja, Mario; García Ruíz, Francisco Javier; Rubio Bretones, Amelia C.; Gómez Martín, Rafael A.; González Arbesú, José María; Romeu Robert, Jordi; Rius Casals, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC., 2003-11-30)
Article
Accés obertA multi-objective genetic algorithm (GA) has been applied in conjunction with the numerical electromagnetic code (NEC) to the optimization of wire pre-fractal Koch-like antennas in terms of bandwidth, efficiency, and ... -
General electromagnetic simulation tool to predict the microwave nonlinear response of planar, arbitrarily-shaped HTS structures
Parrón Granados, Josep; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; O'Callaghan Castellà, Juan Manuel (2001-03)
Article
Accés obertThis work describes a simulation tool being developed at UPC to predict the microwave nonlinear behavior of planar superconducting structures with very few restrictions on the geometry of the planar layout. The software ... -
General electromagnetic simulation tool to predict the microwave nonlinear response of planar, arbitrarily-shaped HTS structures
Parrón Granados, Josep; Collado Gómez, Juan Carlos; Mateu Mateu, Jordi; Rius Casals, Juan Manuel; Duffo Ubeda, Núria; O'Callaghan Castellà, Juan Manuel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-03-31)
Article
Accés obertThis work describes a simulation tool being developed at UPC to predict the microwave nonlinear behavior of planar superconducting structures with very few restrictions on the geometry of the planar layout. The software ... -
Generalization of the equivalence between physical optics and aperture integration for radiation from open-ended structures
Rius Casals, Juan Manuel; Michalski, Krzysztof A. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-06-30)
Article
Accés obertThe theorem of equivalence between the Kirchhoff aperture integration (AI) and the physical optics (PO) approach applied to the interior walls of a open-ended waveguide is generalized to the case of any open-ended structure (OES). -
Geometric algebra formulation of the Calderon Projector
López Menchón, Héctor; Rius Casals, Juan Manuel; Úbeda Farré, Eduard; Heldring, Alexander (2019)
Comunicació de congrés
Accés restringit per política de l'editorialGeometric Algebra provides a mathematical frame-work that allows to express many equations of physics in a more compact way [1]. It unifies the electric and the magnetic field in a single mathematical object: a multivector. ... -
GEROS-ISS, a demonstration mission of GNSS remote sensing capabilities to derive geophysical parameters of the earth surfaces: performance evaluation
Camps Carmona, Adriano José; Hyuk, Park; Ghavidel, Ali; Rius Casals, Juan Manuel; Sekulic, Ivan (Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialThe GNSS rEflectometry, Radio Occultation and Scatterometry onboard International Space Station (GEROS-ISS) is an innovative experiment for climate research, proposed in 2011 within a call of the European Space Agency (ESA) ... -
GILABVIR: Virtual laboratories and remote laboratories in engineering. A teaching innovation group of interest
Cabrera-Bean, Margarita; Bragós Bardia, Ramon; Pérez, Marimar; Mariño Acebal, José Bernardo; Rius Casals, Juan Manuel; Gomis Bellmunt, Oriol; Casany Guerrero, María José; Gironella Cobos, Xavier (Universidad Politécnica de Madrid (UPM), 2010)
Text en actes de congrés
Accés obertGILABVIR (Grup d’Interès en Laboratoris Virtuals i Remots) is a recently created Virtual and Remote Laboratory Group of Interest of UPC (Universitat Politècnica de Catalunya) and it is integrated in a more general teaching ... -
GNSS-R altimetry performance analysis for the GEROS experiment on board the international space station
Camps Carmona, Adriano José; Hyuk, Park; Sekulic, Ivan; Rius Casals, Juan Manuel (MDPI AG, 2017-07-06)
Article
Accés obertThe GEROS-ISS (GNSS rEflectometry, Radio Occultation and Scatterometry onboard International Space Station) is an innovative experiment for climate research, proposed in 2011 within a call of the European Space Agency ...