A new fast physical optics for smooth surfaces by means of a numerical theory of diffraction

Abstract:

A new technique to compute the physical optics (PO) integral is presented. The technique consists of a blind code that computes the different contributions (stationary phase points, end points, etc.) numerically. This technique is based on a decomposition of the surface into small triangles and a fast evaluation of each triangle by means of a deformation of the integration path in the complex plane. This algorithm permits a fast and accurate evaluation of the PO integral for smooth large surfaces. The CPU time is almost independent of frequency. © 2010 IEEE.

Año de publicación:

2010

Keywords:

• Asymptotic expansion
• Highly oscillatory integrals
• Uniform theory of diffraction (UTD)
• Physical optics (PO)
• Path deformation

Fuente:

scopus