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Scattering computation of slightly rough gaussian surfaces by kirchhoff approach with harmonic extraction analysis

Torabi, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1049/cp.2009.1324
  3. Abstract:
  4. The problem of electromagnetic wave scattering from rough surfaces has been the subject of intensive investigations over the past several decades for its applications in a number of important remote sensing implementations. For slightly rough surfaces that the radius of curvature of surface is bigger than the wavelength, the Kirchhoff method is the most commonly used approach. In this paper a new way for scattering computation from rough surfaces is introduced. Here Kirchhoff approach is applied for considering the electromagnetic wave interaction with slightly rough Gaussian surfaces. Fourier series of rough Gaussian surface is used for extracting the strong harmonics of the surface. Then by using the Kirchhoff formulation for periodic surfaces, scattering coefficient is computed. It is shown that by strong harmonics extraction of the rough surface, the acceptable results could be attained. This method could be useful in ray tracing. Asphalt surfaces are simulated by this method in millimeter-wave band. The results are also validated with the method of moments
  5. Keywords:
  6. Fourier series ; Kirchhoff method ; Method of moments ; Periodic ; Rough surface ; Scattering ; Asphalt surfaces ; Commonly used ; Electromagnetic wave interaction ; Gaussian surface ; Harmonic extraction ; Harmonics extraction ; Kirchhoff ; Kirchhoff approach ; Kirchhoff methods ; Millimeter-wave band ; Periodic ; Periodic surfaces ; Radius of curvature ; Rough surfaces ; Scattering co-efficient ; Wave scattering ; Computational electromagnetics ; Electromagnetic waves ; Fourier analysis ; Fourier series ; Gaussian distribution ; Harmonic analysis ; Method of moments ; Microwave devices ; Remote sensing ; Surface measurement ; Electromagnetic wave scattering
  7. Source: IET Conference Publications, 3 November 2009 through 6 November 2009, Beijing ; Volume 2009, Issue 557 CP , 2009 , Pages 292-295 ; 9781849191401 (ISBN)
  8. URL: http://ieeexplore.ieee.org/document/5521258