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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Stephen A. Burns
  • Vol. 25, Iss. 10 — Oct. 1, 2008
  • pp: 2535–2548

Multilevel Green’s function interpolation method for scattering from composite metallic and dielectric objects

Yan Shi, Hao Gang Wang, Long Li, and Chi Hou Chan  »View Author Affiliations


JOSA A, Vol. 25, Issue 10, pp. 2535-2548 (2008)
http://dx.doi.org/10.1364/JOSAA.25.002535


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Abstract

A multilevel Green’s function interpolation method based on two kinds of multilevel partitioning schemes—the quasi-2D and the hybrid partitioning scheme—is proposed for analyzing electromagnetic scattering from objects comprising both conducting and dielectric parts. The problem is formulated using the surface integral equation for homogeneous dielectric and conducting bodies. A quasi-2D multilevel partitioning scheme is devised to improve the efficiency of the Green’s function interpolation. In contrast to previous multilevel partitioning schemes, noncubic groups are introduced to discretize the whole EM structure in this quasi-2D multilevel partitioning scheme. Based on the detailed analysis of the dimension of the group in this partitioning scheme, a hybrid quasi-2D/3D multilevel partitioning scheme is proposed to effectively handle objects with fine local structures. Selection criteria for some key parameters relating to the interpolation technique are given. The proposed algorithm is ideal for the solution of problems involving objects such as missiles, microstrip antenna arrays, photonic bandgap structures, etc. Numerical examples are presented to show that CPU time is between O ( N ) and O ( N log N ) while the computer memory requirement is O ( N ) .

© 2008 Optical Society of America

OCIS Codes
(000.3860) General : Mathematical methods in physics
(000.3870) General : Mathematics
(000.4430) General : Numerical approximation and analysis
(290.5890) Scattering : Scattering, stimulated

ToC Category:
Scattering

History
Original Manuscript: April 25, 2008
Manuscript Accepted: June 30, 2008
Published: September 22, 2008

Citation
Yan Shi, Hao Gang Wang, Long Li, and Chi Hou Chan, "Multilevel Green's function interpolation method for scattering from composite metallic and dielectric objects," J. Opt. Soc. Am. A 25, 2535-2548 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-10-2535

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