Title :
Adaptive sampling for fast physical optics numerical integration
Author :
Burkholder, Robert J. ; Lee, Teh-hong
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
5/1/2005 12:00:00 AM
Abstract :
It is shown that the numerical evaluation of the physical optics integral may be accelerated by an order of magnitude or more by adaptively varying the sampling density. The fast variation of the integrand is determined by the gradient of the phase, which in some regions may require far fewer points-per-wavelength than the standard Nyquist sampling rate.
Keywords :
electromagnetic wave scattering; integration; physical optics; radar cross-sections; sampling methods; adaptive sampling density; electromagnetic scattering; numerical integration; oscillatory integrals; phase gradient; physical optics integral; radar cross sections; Acceleration; Electromagnetic scattering; Optical scattering; Optical surface waves; Physical optics; Radar antennas; Radar scattering; Reflector antennas; Sampling methods; Sea surface; Electromagnetic scattering; integration; oscillatory integrals; physical optics (PO); radar cross sections;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2005.846813
