Multi-region ADI DD-FDTD algorithm for the analysis of three-dimensional sparse multi-objects scattering problem
✍ Scribed by Feng Xu; Ke Wu
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 226 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0894-3370
- DOI
- 10.1002/jnm.661
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✦ Synopsis
Abstract
In this paper, a multi‐region domain decomposition finite‐difference time‐domain (DD‐FDTD) algorithm is proposed and developed for the analysis of multiple‐objects electromagnetic (EM) problems. A significant number of mesh nodes between objects are removed since only local meshes are generated for each object. All the separated sub‐domains are interconnected by the use of a 3‐D time‐domain Green's function. The coupling between objects can be regarded as the equivalent spherical wave irradiations. Incident signals of the equivalent spherical waves are expressed as a spherical wave input field array according to the Huygens principle. The near‐field to far‐field transformation is introduced to obtain the equivalent spherical wave. Moreover, the alternating direction implicit FDTD (ADI‐FDTD) scheme is applied to overcome the limit of the stability condition and increase the speed of the simulation. The new algorithm has been demonstrated and applied to solve typical 3‐D multi‐objects EM scattering problems. Copyright © 2007 John Wiley & Sons, Ltd.