Wave propagation and scattering in rough surface
environments (sponsored by ONR)
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Summary
This project investigates
the scattering from an object buried within a rough surface
environment. The presence of the rough surface produces random
fluctuations in the field, which are modeled by a rough surface Green’s
function. The rough surface Green’s function is applicable to rough
surfaces of small rms height and is based upon the modified diagram
method and the second-order perturbation method. The coherent (average)
Green’s function <G> is obtained by solving Dyson’s equation, which is
the re-normalized perturbation expansion of Green’s theorem. The second
moment of the Green’s function <GG*>, also called the Mutual Coherence
Function (MCF), is obtained by solving Bethe-Salpeter’s equation under
the first-order, second-order ladder and second-order cyclic theory.
Example of intensity of the scattered wave pattern in
rough surface environments
Model of
object (ship) on rough surface (sea)
Related publications
- A. Ishimaru, J. Rockway, Y.
Kuga, and S. W. Lee, "Transverse
electric an transverse magnetic Green's function for coherent and
incoherent propagation over a finitely conducting rough surface,"
Radio Science, vol. 37, no. 3, pp. 1-11, May 2002.
- L.
Tsang, J. Cha, and C. C. Huang, “Surface Electric Fields of
Multi-layered Medium Green’s Functions and Calculation of Impedance
Matrix Elements of Microstrip Structure”, IEE Proc. Microwave,
Antennas and Propagation, vol. 147, no. 3, June 2000, p.
179-186.
- A. Ishimaru, J. Rockway, Y.
Kuga, and S. W. Lee, "Sommerfeld
and Zenneck wave propagation for a finitely conducting
one-dimensional rough surface," IEEE Transactions on Antennas
and Propagation, vol. 48, no. 9, pp. 1475-1484, September 2000.
- A. Ishimaru, J. Rockway, and Y.
Kuga, "Rough
surface Green's function based on the first-order modified
perturbation and smoothed diagram methods," Waves in Random
Meida, vol. 10, no. 1, pp. 17-31, January 2000.
- A. Ishimaru, S. Jaruwatanadilok,
and Y. Kuga, "Imaging and coherence in rough surface and object
scattering," Aspect of rough surface scattering and related
phenomena, Yountville, CA, June 25-28, 2006.
- A. Ishimaru, F. D. Rockway, Y.
Kuga, and S.W. Lee, "Propagation
and scattering of low grazing skimming waves over conducting rough
surfaces," IGARSS, Honolulu, Hawaii, July 24-28, 2000.
- A. Ishimaru, "Statistical
electromagnetic propagation and scattering in random media and rough
surfaces," URSI APS, Salt Lake City, UT, July 16-21,
2000.
Sponsored by ONR
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