Adaptive sampling for fast physical optics numerical integration

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...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2005-05, Vol.53 (5), p.1843-1845
Main Authors: Burkholder, R.J., Teh-Hong Lee
Format: Article
Language:English
Subjects:
Acceleration
Applied sciences
Diffraction, scattering, reflection
Electromagnetic scattering
Exact sciences and technology
integration
Optical scattering
Optical surface waves
oscillatory integrals
Physical optics
physical optics (PO)
Radar antennas
radar cross sections
Radar scattering
Radiocommunications
Radiowave propagation
Reflector antennas
Sampling methods
Sea surface
Telecommunications
Telecommunications and information theory
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Summary: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.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2005.846813