Fast evaluation of Sommerfeld integrals for EM scattering and radiation by three-dimensional buried objects
Journal Article
·
· IEEE Transactions on Geoscience and Remote Sensing
OSTI ID:678046
- Univ. of Illinois, Urbana, IL (United States)
This paper presents a fast method for electromagnetic scattering and radiation problems pertinent to three-dimensional (3-D) buried objects. In this approach, a new symmetrical form of the Green`s function is derived, which can reduce the number of Sommerfeld integrals involved in the buried objects problem. The integration along steepest descent paths and leading-order approximations are introduced to evaluate these Sommerfeld integrals, which can greatly accelerate the computation. Based on the fast evaluation of Sommerfeld integrals, the radiation of an arbitrarily oriented electric dipole buried in a half space is first analyzed and computed. Then, the scattering by buried dielectric objects and conducting objects is considered using the method of moments (MOM). Numerical results show that the fast method can save tremendous CPU time in radiation and scattering problems involving buried objects.
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Office of Naval Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- FG07-97ER14835
- OSTI ID:
- 678046
- Journal Information:
- IEEE Transactions on Geoscience and Remote Sensing, Journal Name: IEEE Transactions on Geoscience and Remote Sensing Journal Issue: 2Pt2 Vol. 37; ISSN IGRSD2; ISSN 0196-2892
- Country of Publication:
- United States
- Language:
- English
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