[数值]A Fast Physical Optics (FPO) Algorithm for Double-Bounce Scattering

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 52, NO. 1, JANUARY 2004 205 [m\,+lG?)j  
A Fast Physical Optics (FPO) Algorithm for usy,V"{  
Double-Bounce Scattering ijFV<P  
Amir Boag, Senior Member, IEEE and Eric Michielssen, Fellow, IEEE ;u,
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Abstract—The fast physical optics (FPO) method for computing 6GzzGP^  
back-scattered fields over ranges of aspect angles and frequencies to'
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is extended to encompass double-bounce scattering. Computations _lP4}9p  
are performed within the framework of the physical optics uoHqL IpQ  
approximation appropriate in the high-frequency regime. The  DwXU  
proposed algorithm is directly applicable to fixed angle bistatic -bA!P
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configurations and a variety of double scattering settings. The S;8.y
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method comprises two steps: 1) decomposition of the scatterer X'@'/[?  
into subscatterers and computation of the scattering amplitudes ailG./I+  
of all pairs of subscatterers and 2) interpolation, phase correction, uJY.5w  
and aggregation of the scattering amplitude patterns of all P{cos&X|  
subscatterer pairs into the pattern of the entire scatterer. The q[P~L`h S  
proposed method is especially suited for generating synthetic RyuEHpN}  
data for radar imaging simulations.
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