Published

2015-06-01

Validation of a non-uniform meshing algorithm for the 3D-FDTD method by means of a two-wire crosstalk experimental set-up

Validación de un algoritmo de enmallado para el método 3D-FDTD por medio de un montaje experimental de diafonía de dos conductores

DOI:

https://doi.org/10.15446/ing.investig.v35n1Sup.53577

Keywords:

Finite-difference time-domain (FDTD) method, non-uniform orthogonal mesh, thin-wire models, crosstalk effect. (en)
Método de diferencias finitas en el dominio del tiempo – FDTD, enmallado ortogonal no uniforme, modelos de conductores delgados, diafonía. (es)

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This paper presents an algorithm used to automatically mesh a 3D computational domain in order to solve electromagnetic interaction scenarios by means of the Finite-Difference Time-Domain -FDTD-  Method. The proposed algorithm has been formulated in a general mathematical form, where convenient spacing functions can be defined for the problem space discretization, allowing the inclusion of small sized objects in the FDTD method and the calculation of detailed variations of the electromagnetic field at specified regions of the computation domain. The results obtained by using the FDTD method with the proposed algorithm have been contrasted not only with a typical uniform mesh algorithm, but also with experimental measurements for a two-wire crosstalk set-up, leading to excellent agreement between theoretical and experimental waveforms. A discussion about the advantages of the non-uniform mesh over the uniform one is also presented.

interchange-newline"> Este trabajo presenta un algoritmo usado para enmallar automáticamente un dominio computacional 3D con el fin de solucionar escenarios de interacción electromagnética por medio del Método de Diferencias Finitas en el Dominio del Tiempo - FDTD. El algoritmo propuesto se ha planteado en una forma matemática general, donde es posible definir funciones convenientes de espaciado aplicadas a la discretización del espacio de simulación. Esto permite la inclusión de objetos pequeños en el método FDTD y el cálculo de variaciones detalladas del campo electromagnético en regiones especificadas del dominio de cálculo. Los resultados obtenidos mediante el método FDTD con el  algoritmo propuesto se han contrastado no sólo con un algoritmo típico de enmallado uniforme, sino también con medidas experimentales para un montaje de diafonía de dos hilos conductores logrando una excelente concordancia entre las formas de onda teóricas y experimentales. Además, se presenta una discusión sobre las ventajas del enmallado no uniforme sobre el uniforme.

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How to Cite

Validation of a non-uniform meshing algorithm for the 3D-FDTD method by means of a two-wire crosstalk experimental set-up. (2015). Ingeniería E Investigación, 35(1Sup), 98-103. https://doi.org/10.15446/ing.investig.v35n1Sup.53577

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Copyright (c) 2015 Raúl Esteban Jiménez-Mejía, Javier Gustavo Herrera Murcia

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