Title :
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
fDate :
3/1/2010 12:00:00 AM
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);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2009.2039308
