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Palabras claves o descriptores: ELECTROMAGNETIC (Comienzo)
2 registros cumplieron la condición especificada en la base de información BIBCYT. ()
Registro 1 de 2, Base de información BIBCYT
Publicación seriada
Referencias AnalíticasReferencias Analíticas
Autor: Hiptmair, R.
Título: Coupling of Finite Elements and Boundary Elements in Electromagnetic Scattering
Páginas/Colación: pp. 919 - 944
Url: Ir a http://epubs.siam.org/sam-bin/dbq/article/39775http://epubs.siam.org/sam-bin/dbq/article/39775
Siam Journal on Numerical Analysis Vol. 41, no. 3 May/July 2004
Información de existenciaInformación de existencia

Palabras Claves: Palabras: BREAK CALDERÓN PROJECTOR BREAK CALDERÓN PROJECTOR, Palabras: DISCRETE COERCIVITY DISCRETE COERCIVITY, Palabras: EDGE ELEMENTS EDGE ELEMENTS, Palabras: ELECTROMAGNETIC SCATTERING ELECTROMAGNETIC SCATTERING, Palabras: HELMHOLTZ DECOMPOSITION HELMHOLTZ DECOMPOSITION, Palabras: HODGE DECOMPOSITION HODGE DECOMPOSITION, Palabras: SYMMETRIC COUPLING SYMMETRIC COUPLING

Resumen
We consider the scattering of monochromatic electromagnetic waves at a dielectric object with a rough surface. We investigate the coupling of a weak formulation of Maxwell's equations inside the scatterer with boundary integral equations that arise from the homogeneous problem in the unbounded region outside the scatterer. The symmetric coupling approach based on the full Calderón projector for Maxwell's equations is employed. By splitting both the electric field inside the scatterer and the surface currents into components of predominantly electric and magnetic nature, we can establish coercivity of the coupled variational problem, provided that the frequency is away from resonant frequencies. Discretization relies on both curl-conforming edge elements inside the scatterer and $\bDiv$-\break conforming boundary elements for the surface currents. The splitting idea, adjusted to the discrete setting, permits us to show uniform stability of the discretized problem. We exploit it to come up with a priori convergence estimates.

Registro 2 de 2, Base de información BIBCYT
Publicación seriada
Referencias AnalíticasReferencias Analíticas
Autor: Banks, H. T. ; Ito, K. ; Kepler, G. M. ; Toivanen, J. A.
Título: Material Surface Design to Counter Electromagnetic Interrogation of Targets
Páginas/Colación: 1027-1049 p.
Url: Ir a http://siamdl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=SMJMAP000066000003001027000001&idtype=cvips&gifs=Yeshttp://siamdl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=SMJMAP000066000003001027000001&idtype=cvips&gifs=Yes
SIAM Journal on Applied Mathematics Vol. 66, no. 3 Febr./March 2006
Información de existenciaInformación de existencia

Palabras Claves: Palabras: ATTENUATION ATTENUATION, Palabras: ELECTROMAGNETIC ELECTROMAGNETIC, Palabras: INVERSE SCATTERING INVERSE SCATTERING

Resumen
RESUMEN

RESUMEN

 

Utilization of controllable ferromagnetic layers coating a conducting object to provide an attenuation capability against electromagnetic interrogation is discussed. The problem is formulated as a differential game and/or a robust optimization. The scattered field due to interrogation can be attenuated with the assumption of an uncertainty in the interrogation wave numbers. The controllable layer composed of ferromagnetic materials [H. How and C. Vittoria, Implementation of Microwave Active Nulling, private communication; H. How and C. Vittoria, IEEE Trans. Microwave Theory Tech., 52 (2004), pp. 2177-2182] is incorporated in a mathematical formulation based on the time-harmonic Maxwell equation. Fresnel's law for the reflectance index is extended to the electromagnetic propagation in anisotropic composite layers of ferromagnetic and electronic devices and is used to demonstrate feasibility of control of reflections. Our methodology is also tested for a nonplanar geometry of the conducting object (an NACA airfoil) in which we report our findings in the form of reduced radar cross sections (RCS)\@.

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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