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IEEE Transactions on Antennas and Propagation
Volume 48 Number 8, August 2000

Table of Contents for this issue

Complete paper in PDF format

Scattering from a Large Body with Cracks and Cavities by the Fast and Accurate Finite-Element Boundary-Integral Method

Xin-Qing Sheng, Edward Kai-Ning Yung, Chi H. Chan, J. M. Jin and W. C. Chew

Page 1153.

Abstract:

A large body with cracks and cavities is a kind of typical structure widely existing in realistic targets. In this paper, a newly developed fast and accurate finite-element boundary-integral (FA-FE-BI) method is applied to compute scattering by this kind of scatterers. A thorough analysis on this FA-FE-BI numerical technique is presented, clearly demonstrating that this technique has computational complexity O(N log N) and memory requirement O(N) (N is the total number of surface unknowns). An inward-looking approach is employed as a preconditioner to speed up the rate of convergence of iterative solvers for this structure. Under these techniques, a powerful code is developed for this kind of scatterers whose accuracy, efficiency,and capability is well confirmed by various numerical results.

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