A New Fast Physical Optics for Smooth Surfaces by Means of a Numerical Theory of Diffraction

Author

Vico-Bondia, Felipe ; Ferrando-Bataller, Miguel ; Valero-Nogueira, Alejandro

Author_Institution

Dept. de Comun., Univ. Politec. de Valencia, Valencia, Spain

Volume

58

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

773

Lastpage

789

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.

Keywords

geometrical theory of diffraction; physical optics; fast physical optic integral; numerical theory of diffraction; path deformation; surface decomposition; uniform theory of diffraction; Frequency; Helium; Linear approximation; Linear systems; Magnetic fields; Moment methods; Optical computing; Optical scattering; Physical optics; Physical theory of diffraction; Physics computing; Postal services; Asymptotic expansion; highly oscillatory integrals; path deformation; physical optics (PO); uniform theory of diffraction (UTD);

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2009.2039308

Filename

5361338