title: Coordinate transformation formulation of electromagnetic scattering from imperfectly periodic surfaces.
abstract: This paper considers the electromagnetic scattering problem of periodically corrugated surface with local imperfection of structural periodicity, and presents a formulation based on the coordinate transformation method (C-method). The C-method is originally developed to analyze the plane-wave scattering from perfectly periodic structures, and uses the pseudo-periodic property of the fields. The fields in imperfectly periodic structures are not pseudo-periodic and the C-method cannot be directly applied. This paper introduces the pseudo-periodic Fourier transform to convert the fields in imperfectly periodic structures to pseudo-periodic ones, and the C-method becomes then applicable.
authors.affiliation: Department of Information and Communication Engineering, Fukuoka Institute of Technology, 3-30-1 Wajirohigashi, Fukuoka 811-0295, Japan. koki@fit.ac.jp
authors.forename: Koki
authors.initials: K
authors.lastname: Watanabe
authors.forename: Jaromír
authors.initials: J
authors.lastname: Pištora
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Nakatake
mesh_terms: D003198:Computer Simulation; D004574:Electromagnetic Fields; D008420:Manufactured Materials; D008962:Models, Theoretical; D012542:Scattering, Radiation; D013499:Surface Properties