DocumentCode :
954188
Title :
Optimization of radar cross section by a gradient method
Author :
Bondeson, A. ; Yang, Y. ; Weinerfelt, P.
Author_Institution :
Dept. of Electromagn., Chalmers Univ. of Technol., Goteborg, Sweden
Volume :
40
Issue :
2
fYear :
2004
fDate :
3/1/2004 12:00:00 AM
Firstpage :
1260
Lastpage :
1263
Abstract :
Analytical expressions are derived for the derivatives of radar cross sections (RCS) with respect to scatterer shape in two and three dimensions. Using the adjoint formulation, the derivatives of the RCS, with respect to an arbitrary number of design parameters, are found from a single solution of the scattering problem. In two dimensions, gradient-based optimizations converge with a small number of iterations to shapes with strongly reduced RCS in specified angular intervals. The optimal shapes have sharp corners in directions where the RCS is minimized and exhibit corrugations, which can be suppressed by use of penalty functions. The method is also applied to RCS optimization using dielectric and magnetic absorbing materials.
Keywords :
dielectric materials; electromagnetic wave scattering; gradient methods; magnetic materials; method of moments; optimisation; radar cross-sections; radar theory; RCS derivatives; RCS optimization; adjoint equation; adjoint formulation; analytical expressions; design parameters; dielectric absorbing materials; gradient method; gradient-based optimizations converge; magnetic absorbing materials; penalty functions; radar cross section; scatterer shape; Aerospace electronics; Backscatter; Bonding; Electromagnetic scattering; Equations; Gradient methods; Optimization methods; Radar cross section; Radar scattering; Shape;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2004.824730
Filename :
1284649
Link To Document :
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