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Chin. Phys. B, 2010, Vol. 19(4): 044102    DOI: 10.1088/1674-1056/19/4/044102
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Application of the method of equivalent edge currents to composite scattering from the cone-cylinder above a dielectric rough sea surface

Guo Li-Xin, Wang Rui, Wu Zhen-Sen
School of Science, Xidian University, Xi'an 710071, China
Abstract  Compared with scattering from a rough surface only, composite scattering from a target above a rough surface has become so practical that it is a subject of great interest. At present, this problem has been solved by some numerical methods which will produce an enormous calculation amount. In order to overcome this shortcoming, the reciprocity theorem (RT) and the method of equivalent edge currents (MEC) are used in this paper. Due to the advantage of RT, the difficulty in computing the secondary scattered fields is reduced. Simultaneously, MEC, a high-frequency method with edge diffraction considered, is used to calculate the scattered field from the cone-cylinder target with a high accuracy and efficiency. The backscattered field and the polarization currents of the rough sea surface are evaluated by the Kirchhoff approximation (KA) method and physical optics (PO) method, respectively. The effects of the backscattering radar cross section (RCS) and the Doppler spectrum on the size of the target and the windspeed of the sea surface for different incident angles are analysed in detail.
Keywords:  method of equivalent edge currents      rough sea surface      reciprocity theorem      electromagnetic scattering      cone-cylinder     
Received:  12 August 2009      Published:  15 April 2010
PACS:  93.85.-q (Instruments and techniques for geophysical research: Exploration geophysics)  
  92.10.Fj (Upper ocean and mixed layer processes)  
  91.50.Iv (Marine magnetics and electromagnetics)  
  92.60.Gn (Winds and their effects)  
  42.68.Xy (Ocean optics)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No.~60971067) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No.~20070701010).

Cite this article: 

Guo Li-Xin, Wang Rui, Wu Zhen-Sen Application of the method of equivalent edge currents to composite scattering from the cone-cylinder above a dielectric rough sea surface 2010 Chin. Phys. B 19 044102

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