Face-Centered Anisotropic Surface Impedance Boundary Conditions in FDTD
Metadatos
Mostrar el registro completo del ítemAutor
Flintoft, Ian; Bourke, Samuel; Dawson, John; Alvarez Gonzalez, Jesus; Ruiz Cabello, Miguel; Robinson, M. P.; González García, SalvadorEditorial
IEEE
Materia
Finite-difference time domain Impedance network boundary condition Surface-impedance boundary condition
Fecha
2018Referencia bibliográfica
Flintoft, Ian; et. al. Face-Centered Anisotropic Surface Impedance Boundary Conditions in FDTD. IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 2, pp. 643-650, Feb. 2018 [http://hdl.handle.net/10481/50236]
Patrocinador
This work was supported by the U.K. Engineering and Physical Sciences Research Council through the Flapless Air Vehicle Integrated Industrial Research Programme under Grant GR/S71552/01, in part by the European Community’s Seventh Framework Programme under Grant FP7/2007-2013, in part by the High Intensity Radiated Field Synthetic Environment Research Project under Grant 205294, in part by the Spa nish MINECO, EU FEDER under Project TEC2013-48414-C3-01 and Project TEC2016-79214-C3-3-R, and in part by J. de Andalucia, Spain under Project P12-TIC-1442Resumen
Thin-sheet models are essential to allow shielding
effectiveness of composite enclosures and vehicles to be modeled.
Thin dispersive sheets are often modeled using surface-impedance
models in finite-difference time-domain (FDTD) codes in order to
deal efficiently with the multiscale nature of the overall structure.
Such boundary conditions must be applied to collocated tangen-
tial electric and magnetic fields on either side of the surface; this
is usually done on the edges of the FDTD mesh cells at the electric
field sampling points. However, these edge-based schemes are
difficult to implement accurately on stair-cased surfaces. Here,
we present a novel face-centered approach to the collocation of
the fields for the application of the boundary condition. This
approach naturally deals with the ambiguities in the surface
normal that arise at the edges on stair-cased surfaces, allowing
a simpler implementation. The accuracy of the new scheme is
compared to edge-based and conformal approaches using both
planar sheet and spherical shell canonical test cases. Staircasing
effects are quantified and the new face-centered scheme is shown
have up to 3-dB lower error than the edge-based approach in
the cases considered, without the complexity and computational
cost of conformal techniques.