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A closed-form analytic solution based on a time-domain (TD) physical optics (PO) approximation is developed for the scattering from a finite second-order surface when illuminated by a transient impulsive plane wave. This TD-PO solution can be applied via a convolution to derive the early time transient fields scattered from the same scatterer that is illuminated by a realistic astigmatic finite-energy pulse. The closed form TD-PO solution is obtained by inverting the corresponding frequency-domain PO solution into TD. This solution can be expressed in terms of reflection and diffraction components of the scattering mechanisms as in other conventional high-frequency asymptotic solutions. Numerical examples are presented to demonstrate its physical phenomenon of the scattering mechanisms
Published in:
Antennas and Propagation, IEEE Transactions on
(Volume:54
,
Issue:
9
)
Date of Publication: Sept. 2006
- Page(s):
- 2463 - 2471
- ISSN :
- 0018-926X
- INSPEC Accession Number:
- 9080694
- Digital Object Identifier :
- 10.1109/TAP.2006.880672
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 September 2006
- Issue Date :
- Sept. 2006
- Sponsored by :
- IEEE Antennas and Propagation Society
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