New approach of diffraction of electromagnetic waves by a rough surface
| Autor: | Chandezon, Jean, Plumey, Jean-Pierre |
|---|---|
| Přispěvatelé: | Institut Pascal (IP), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-SIGMA Clermont (SIGMA Clermont)-Centre National de la Recherche Scientifique (CNRS), Chandezon, Jean |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Computational electromag-netic
[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic (2600260) [SPI.ELEC] Engineering Sciences [physics]/Electromagnetism OCIS codes: (2905880) Scattering rough surfaces [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Physics::Optics (0500050) Diffraction and gratings (2602110) Electro-magnetic optics |
| Popis: | We consider the diffraction of a plane wave by a rough surface. In the sake of simplicity the study is restricted to the case of perfectly conducting surfaces. Solving this problem is only possible by limiting the infinite rough surface to a window of width D. We show that we can obtain the diffraction pattern at infinity in the Fraunhofer zone from the modeling of diffraction by a grating with period D whose elementary pattern coincides with the rough surface in the window D. We give some numerical results for triangular profiles or rectified cosine. We show that for small heights we find that the most widely Kirchhoff approximation is very well checked. This modeling can be applied to Fraunhofer diffraction problem by a non-planar metal strip and the complementary problem of diffraction by a perfectly conducting screen, infinitely thin and with a slit of one or more periods. |
| Databáze: | OpenAIRE |
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