Results
author = "Rius Casals, Juan Manuel"
Zeroth-order divergence-complete discretizations of the EFIE at very low frequencies
Description :
We present the Self-Loop basis
functions, an edge-oriented divergence-conforming
set with zero charge density. These basis functions
allow a rearrangement of the Linear-linear basis
functions set to overcome the low-frequency
breakdown of the Electric-field Integral Equation.
Repository :
UPCommons - E-prints UPC
Language(s) :
English
Application of Multilevel Adaptive Cross Approximation (MLACA) to electromagnetic scattering and radiation problems
Description :
Repository :
UPCommons - E-prints UPC
Language(s) :
English
Fast direct solution of the combined field integral equation
Description :
The 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 CFIE is often
much more efficient because it yields a well conditioned
impedance m...
Repository :
UPCommons - E-prints UPC
Language(s) :
English
Compression of the MoM matrix using macrobasis functions with a full-controlable accuracy
Description :
A new accuracy-controlable method for compressing the MoM impedance matrix of an electromagnetic problem based on a basis change plus a truncation with a threshold is presented here. The idea is to switch to singular basis functions, which are defined on relatively large subdomains of the object, re...
Repository :
UPCommons - E-prints UPC
Language(s) :
English
On the efficient evaluation of hyper-singular integrals in Galerkin surface integral equation formulations via the direct evaluation method
Author(s) :
Tamayo Palau, José María
,
Polimeridis, Athanasios G.
,
Rius Casals, Juan Manuel
,
Mosig, Juan Ramón
Description :
In this paper, the direct evaluation method tailored for the hyper-singular integrals arising in Galerkin surface integral equation formulations is developed.[...] The proposed method utilizes a series of coordinate transformations together with a re-ordering of the integrations in order to reduce t...
Repository :
UPCommons - E-prints UPC
Language(s) :
English
Accelerated direct solution of the MoM-VIE for dielectric scatterers
Author(s) :
Heldring, Alexander
,
Tamayo Palau, José María
,
Rius Casals, Juan Manuel
,
Úbeda Farré, Eduard
Description :
The Multiscale Compressed Block Decomposition
algorithm (MS-CBD), a direct (non-iterative) linear solver, is applied to accelerate the solution of the MoM-VIE formulation for dielectric scatterers. Numerical solutions are presented for problems with several hundreds of thousands of unknowns.
Asympto...
Repository :
UPCommons - E-prints UPC
Language(s) :
English
On the usage of GRECOSAR: an orbital polarimetric SAR simulator of complex targets for vessel classification studies
Author(s) :
Margarit Martín, Gerard
,
Mallorquí Franquet, Jordi Joan
,
Rius Casals, Juan Manuel
,
Sanz Marcos, Jesús
Description :
This paper presents a synthetic aperture radar (SAR)
simulator that is able to generate polarimetric SAR (POLSAR)
and polarimetric inverse SAR data of complex targets. It solves
the electromagnetic problem via high-frequency approximations,
such as physical optics and the physical theory of diffract...
Repository :
UPCommons - E-prints UPC
Language(s) :
English
Accurate numerical modeling of the TARA reflector system
Author(s) :
Heldring, Alexander
,
Rius Casals, Juan Manuel
,
Ligthart, Leo P.
,
Cardama Aznar, Ángel
Description :
The radiation pattern of the large parabolic reflectors
of the Transportable Atmospheric RAdar system (TARA), developed
at Delft University of Technology, has been accurately simulated.
The electric field integral equation (EFIE) formulation has
been applied to a model of the reflectors including th...
Repository :
UPCommons - E-prints UPC
Language(s) :
English
Method of moments enhancement technique for the analysis of Sierpinski pre-fractal antennas
Author(s) :
Parrón Granados, Josep
,
Romeu Robert, Jordi
,
Rius Casals, Juan Manuel
,
Mosig, Juan R.
Description :
The numerical analysis of highly iterated Sierpinski
microstrip patch antennas by method of moments (MoM) involves
many tiny subdomain basis functions, resulting in a very large
number of unknowns. The Sierpinski pre-fractal can be defined
by an iterated function system (IFS). As a consequence, the
...
Repository :
UPCommons - E-prints UPC
Language(s) :
English
Spectral iterative algorithm for RCS computation in electrically large or intermediate perfectly conducting cavities
Author(s) :
Rius Casals, Juan Manuel
,
Lozano Solsona, Angel
,
Cardama Aznar, Ángel
,
Jofre Roca, Lluís
Description :
A novel algorithm designed to compute efficiently and accurately the high-frequency electromagnetic scattering from open-ended waveguide cavities is presented. The cavity is converted into a stepped-waveguide model so that the field spectra are propagated, forward and backward, along each waveguide ...
Repository :
UPCommons - E-prints UPC
Language(s) :
English