Effective multigrid preconditioned CG algorithm for millimeter wave scattering by an infinite plane metallic grating

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Original languageEnglish
Pages (from-to)945-963
Journal / PublicationInternational Journal of Infrared and Millimeter Waves
Issue number6
Publication statusPublished - 2000


An effective multigrid based preconditioned conjugate gradient method is developed to solve electromagnetic large matrix problem for millimeter wave scattering application. By using multigrid technique we restrict the large matrix equation to a relative smaller matrix and which can be solved rapidly. The solution is prolonged as the initial guess for the conjugate gradient (CG) method. Numerical results show that our developed method can reach five times improvement of computational complexity.