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Mode-expansion method for calculating electromagnetic waves scattered by objects on rough ocean surfaces

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7 Author(s)
Zhang, Yan ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Lu, Jie ; Pacheco, J., Jr. ; Moss, C.D.
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A mode-expansion method that needs less than 6% the number of unknowns required by conventional method of moments is introduced in calculating two-dimensional electromagnetic wave scattering from perfectly conducting objects on rough ocean surfaces. Modes are selected for dominant propagation waves so that the number of unknowns in the matrix equation are minimized. In the numerical examples, ocean surfaces are modeled as perfectly conducting rough surfaces described by the Pierson-Moskowitz power spectrum. Bistatic radar cross-sections (RCS) of various objects, such as ship-like and low-observable targets, are calculated for a 1-GHz incident plane wave and are validated for accuracy against an iterative MoM solution.

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Antennas and Propagation, IEEE Transactions on  (Volume:53 ,  Issue: 5 )