Programa del congreso
Resúmenes y datos de las sesiones para este congreso. Esta página se puede utilizar para preparar la página web del congreso, para crear un CD o un documento impreso para el congreso
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Resumen de las sesiones |
Sesión | |||||
Mi.1-1: Electromagnetismo computacional (sesión especial)
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Funciones de Green estocásticas para cavidades caóticas Universidad de Extremadura, España La propagación electromagnética dentro de cavidades puede mostrar comportamiento caótico. Esto sucede para la mayoría de geometrías siempre que las pérdidas no sean muy elevadas. La caracterización del comportamiento electromagnético es, por tanto, poco práctico desde el punto de vista tradicional, ya que muy pequeños cambios en el problema (frecuencia, geometría, permitividad y permeabilidad del interior, cambios de temperatura, cambios de presión, etc.) producen grandes cambios en el campo electromagnético interior. Es por ello que una caracterización estocástica es más conveniente que una caracterización determinista. Bajo este enfoque, recientemente se ha introducido el concepto de función de Green estocástica. En esta comunicación, se demostrará que la función de Green estocástica es una variable aleatoria de tipo Cauchy para entornos no disipativos y una variable aleatoria de tipo $\alpha-$estable más general para entornos disipativos de muy bajas pérdidas.
Análisis de dispersión de cilindros de sección arbitraria mediante la matriz de transición y transformación entre ondas cilíndricas y ondas planas 1Universidad de Extremadura, España; 2at Ecole Polytechnique Fédérale de Lausanne, Switzerland; 3Universidad Politécnica de Madrid Scattering of arbitrary cross-section parallel cylinders is calculated by means of the transition matrix of each single scatterer and the general translational matrix for cylindrical waves. Although there are several methods to obtain the transition matrix of a cylindrical scatterer, the general translational matrix, by contrast, has always been calculated using Graf’s addition theorem due to its efficiency. However, restriction of validity of this theorem prevents its application in those cases where, for a pair of cylinders, the center of one of them falls within the minimum circular cylinder that circumscribes the other. In order to overcome this limitation, a transformation between cylindrical waves and plane waves, and propagation of the latter, is proposed. To this aim, it is shown that an adequate truncation of the evanescent plane wave spectrum should be carried out. As an example, the scattering of a group of infinite elliptic metallic cylinders is computed.
Shrinking Electromagnetics into a Simple Circuit: Advanced CEM codes for CAD Universidad Politécnica de Madrid, España A new model order reduction strategy based on the reduced-basis method is carried out in this work. Starting off from time-harmonic Maxwell's equations, a new representation of the original Maxwell system is developed. First, a reduced basis approximation allows for a reduced-order representation of electrodynamics in the frequency band of interest. As a result, the Kurokawa series representation for electromagnetics turns pretty much into a finite sum of dominant eigenresonances, which stand upon global eigenmodes of the Maxwell system. This gives rise to a linear dynamical system in electromagnetics and, after a proper arrangement, provides extremely useful physical information from which an electrical engineer can get actionable design insights. In this work, we use computational electromagnetics as an actual design tool and several realistic design applications will be considered during the presentation.
Formulación de Red Multimodal Equivalente para Dispositivos de Microondas Encapsulados Compuestos por Metalizaciones con Espesor Finito 1Universidad Politécnica de Cartagena, España; 2Universidad Politécnica de Valencia, España In this paper, we extend the Multimode Equivalent Network (MEN) formulation for the analysis of encapsulated microwave components that are composed by metallizations with a non-negligible thickness. To accomplish this goal, the analysis is divided in two steps: first we formulate two different equivalent networks corresponding to the two thick steps present in the structure, and then we cascade them to obtain the final network that characterizes the complete circuit. This theoretical approach is validated through two practical microwave bandpass filters. We experimentally demonstrate in these examples that zerothickness approximations are not accurate to solve this kind of problems, thereby demonstrating the importance of the MEN extension proposed in this contribution.
An interior penalty DG-JMCFIE Formulation for Piecewise Homogeneous Objects with multimaterial junctions 1Universidad de Extremadura; 2Universidade de Vigo This work investigates the application of the JMCFIE formulation to the discontinuous Galerkin surface integral equation method for the electromagnetic analysis of arbitrarily shaped piecewise homogeneous objects. In the proposed scheme, nonoverlapping boundary surfaces and interfaces between materials can be handled independently, without any continuity requirement through multi-material junctions and tear lines between surfaces in contact. The proposed formulation can readily address nonconformal multi-material junctions, where three or more material regions meet. This completely avoids the cumbersome junction problem, which no longer requires any special treatment. Numerical experiments will be shown to validate the accuracy and demonstrate the great versatility of the proposed JMCFIE-DG formulation for the management and solution of complex composite objects with junctions.
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