Ponències/Comunicacions de congressos
http://hdl.handle.net/2117/3132
2016-07-27T11:34:56ZSegmentación y formulación de realimentación en el análisis de la difracción de objetos grandes
http://hdl.handle.net/2117/88557
Segmentación y formulación de realimentación en el análisis de la difracción de objetos grandes
Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel
In this work, the application of the feedback formulation to study several objects that have been attached to form a bigger scatterer is presented. With this technique, a large obstacle can be segmented in several ones and the scattered field can be computed as the result of the multiple interactions among these parts. The results obtained for large scatterers are shown.
2016-07-06T13:50:02ZCruellas Ibarz, Juan CarlosFerrando Bataller, MiquelIn this work, the application of the feedback formulation to study several objects that have been attached to form a bigger scatterer is presented. With this technique, a large obstacle can be segmented in several ones and the scattered field can be computed as the result of the multiple interactions among these parts. The results obtained for large scatterers are shown.Cálculos electromagnéticos en 3 dimensiones mediante el método de los elementos de contorno
http://hdl.handle.net/2117/87951
Cálculos electromagnéticos en 3 dimensiones mediante el método de los elementos de contorno
Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel
The Boundary Element Method is applied to solve 3 D electromagnetic problems.
The basic formulation and associated items (integral equation to solve, surface discretization, fields interpolation and numerical integration) are commented.
Obtained results when this technique is applied to the study of boundary problems are shown.
2016-06-13T15:17:27ZCruellas Ibarz, Juan CarlosFerrando Bataller, MiquelThe Boundary Element Method is applied to solve 3 D electromagnetic problems.
The basic formulation and associated items (integral equation to solve, surface discretization, fields interpolation and numerical integration) are commented.
Obtained results when this technique is applied to the study of boundary problems are shown.Formulación de realimentación para el análisis de la difracción de objetos múltiples
http://hdl.handle.net/2117/87940
Formulación de realimentación para el análisis de la difracción de objetos múltiples
Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel
Electromagnetic scattering of several dielectric objects is computed by a method which uses a feedback formulation to model multiple interactions between scatterers and expreses incident and scattered fields as sums of cylindrical modes, which results in small matrix sizes.
The obtained results are shown and compared with the obtained ones with usual techniques.
2016-06-13T14:13:29ZCruellas Ibarz, Juan CarlosFerrando Bataller, MiquelElectromagnetic scattering of several dielectric objects is computed by a method which uses a feedback formulation to model multiple interactions between scatterers and expreses incident and scattered fields as sums of cylindrical modes, which results in small matrix sizes.
The obtained results are shown and compared with the obtained ones with usual techniques.Cálculo de la difracción de cilindros de forma arbitraria mediante el método de los elementos de contorno
http://hdl.handle.net/2117/87932
Cálculo de la difracción de cilindros de forma arbitraria mediante el método de los elementos de contorno
Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel
The Boundary Element Method is applied to computing electromagnetic scattering of dielectric cylinders of arbitrary shape.
The obtained results are shown and compared with analytic solutions and previous results obtained by unimoment method and spectral-iteration technique.
2016-06-13T13:53:13ZCruellas Ibarz, Juan CarlosFerrando Bataller, MiquelThe Boundary Element Method is applied to computing electromagnetic scattering of dielectric cylinders of arbitrary shape.
The obtained results are shown and compared with analytic solutions and previous results obtained by unimoment method and spectral-iteration technique.A hybrid modal-boundary element method for electromagnetic scattering from arbitrary conducting wedges
http://hdl.handle.net/2117/87922
A hybrid modal-boundary element method for electromagnetic scattering from arbitrary conducting wedges
Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel
A hybrid technique is used to determine the electromagnetic scattering contribution of arbitrary conducting wedges in electrically large objects. The boundary integral equation is discretized in a fictitious contour, and the field outside is expanded in modal series. From the knowledge of fields at the conducting surface, the method could be used jointly with a physical-optics high-frequency approximation to obtain the radar cross section of electrically large objects. Results are presented for the total field in an infinite conducting wedge under TM plane-wave illumination. From the eigenfunction solution, the currents at the surface of the wedge can be easily determined.
2016-06-13T12:37:10ZCruellas Ibarz, Juan CarlosFerrando Bataller, MiquelA hybrid technique is used to determine the electromagnetic scattering contribution of arbitrary conducting wedges in electrically large objects. The boundary integral equation is discretized in a fictitious contour, and the field outside is expanded in modal series. From the knowledge of fields at the conducting surface, the method could be used jointly with a physical-optics high-frequency approximation to obtain the radar cross section of electrically large objects. Results are presented for the total field in an infinite conducting wedge under TM plane-wave illumination. From the eigenfunction solution, the currents at the surface of the wedge can be easily determined.Scattering of dielectric cylinders using feedback formulation and segmentation
http://hdl.handle.net/2117/87896
Scattering of dielectric cylinders using feedback formulation and segmentation
Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel
The feedback formulation, which uses graphs to model multiple interactions between objects and sums of cylindrical modes to express electromagnetic fields, is used to study several objects that have been attached to form a larger scatterer. Thus, large scatterers can be segmented into smaller ones, and the modal expressions for the fields reduce the dimensions of the matrix involved in the problem. Results are presented for two rectangular cylinders, the scattered field of which was studied when the incident field was a TM (transverse magnetic) plane wave.
2016-06-10T13:58:56ZCruellas Ibarz, Juan CarlosFerrando Bataller, MiquelThe feedback formulation, which uses graphs to model multiple interactions between objects and sums of cylindrical modes to express electromagnetic fields, is used to study several objects that have been attached to form a larger scatterer. Thus, large scatterers can be segmented into smaller ones, and the modal expressions for the fields reduce the dimensions of the matrix involved in the problem. Results are presented for two rectangular cylinders, the scattered field of which was studied when the incident field was a TM (transverse magnetic) plane wave.Feedback formulation for multiple scatterers
http://hdl.handle.net/2117/87894
Feedback formulation for multiple scatterers
Cruellas Ibarz, Juan Carlos; Ferrando Bataller, Miquel
A numerical method for the scattering problem is presented that uses feedback formulation to model multiple interactions between objects, expressing incidents and scattered fields as sums of cylindrical modes, resulting in smaller matrix sizes. The method entails three steps: the characterization of each object, then the transformation of each emerging mode from one object into incident fields on the others and then the computation of the scattered fields
2016-06-10T13:52:39ZCruellas Ibarz, Juan CarlosFerrando Bataller, MiquelA numerical method for the scattering problem is presented that uses feedback formulation to model multiple interactions between objects, expressing incidents and scattered fields as sums of cylindrical modes, resulting in smaller matrix sizes. The method entails three steps: the characterization of each object, then the transformation of each emerging mode from one object into incident fields on the others and then the computation of the scattered fieldsAnálisis de guías parcialmente rellenas de dieléctrico mediante el método de los elementos finitos
http://hdl.handle.net/2117/87534
Análisis de guías parcialmente rellenas de dieléctrico mediante el método de los elementos finitos
Ferrando Bataller, Miquel; Cruellas Ibarz, Juan Carlos; Cardama Aznar, Ángel; Jofre Roca, Lluís
The finite element's method is aplied to the study of inhomogenous waveguides of arbitrary cross-section. The fields in the guide are - expanded in a series of bidimensional functions, obtaining a variational expression that is minimized in each subdomain. The eingenvectors of the resulting matrix are related with the waveguide modes and the eingenvalues with the propagation constants.
2016-05-31T10:43:02ZFerrando Bataller, MiquelCruellas Ibarz, Juan CarlosCardama Aznar, ÁngelJofre Roca, LluísThe finite element's method is aplied to the study of inhomogenous waveguides of arbitrary cross-section. The fields in the guide are - expanded in a series of bidimensional functions, obtaining a variational expression that is minimized in each subdomain. The eingenvectors of the resulting matrix are related with the waveguide modes and the eingenvalues with the propagation constants.Scalable hybrid path computation procedure for PCE-based
http://hdl.handle.net/2117/87378
Scalable hybrid path computation procedure for PCE-based
Hernández Sola, Guillem; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel
In the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed
using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low
network blocking probability meanwhile it results on a great amount of control overhead messages. In this paper
we propose a hybrid path computation procedure based on the H-PCE architecture and the Backward Recursive
PCE-Based Computation (BRPC). Extensive simulation results show that the proposed approach performs better
than H-PCE in terms of network control overhead.
2016-05-26T14:20:38ZHernández Sola, GuillemPerelló Muntan, JordiAgraz Bujan, FernandoSpadaro, SalvatoreComellas Colomé, JaumeJunyent Giralt, GabrielIn the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed
using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low
network blocking probability meanwhile it results on a great amount of control overhead messages. In this paper
we propose a hybrid path computation procedure based on the H-PCE architecture and the Backward Recursive
PCE-Based Computation (BRPC). Extensive simulation results show that the proposed approach performs better
than H-PCE in terms of network control overhead.Dynamic impairment-aware optical networking: some experimental results of the EU DICONET project
http://hdl.handle.net/2117/87372
Dynamic impairment-aware optical networking: some experimental results of the EU DICONET project
Spadaro, Salvatore; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Angelou, Marianna; Azodolmolky, Siamak; Qin, Yixuan; Nejabati, Reza; Simeonidou, Dimitra; Tomkos, Ioannis
The paper presents some results from the experimental validation of the achievements of the EU DICONET
project. Specifically, the DICONET test-bed is presented and the experiments conducted for the performance
evaluation of the control plane approaches designed to include the Physical layer Information (PLI) in the
Routing and Wavelength Assignment (RWA) problem are discussed.
2016-05-26T14:10:47ZSpadaro, SalvatorePerelló Muntan, JordiAgraz Bujan, FernandoAngelou, MariannaAzodolmolky, SiamakQin, YixuanNejabati, RezaSimeonidou, DimitraTomkos, IoannisThe paper presents some results from the experimental validation of the achievements of the EU DICONET
project. Specifically, the DICONET test-bed is presented and the experiments conducted for the performance
evaluation of the control plane approaches designed to include the Physical layer Information (PLI) in the
Routing and Wavelength Assignment (RWA) problem are discussed.