Iterative Physical Optics for Radar Scattering Predictions

─ The iterative physical optics (IPO) method is applied to compute the radar cross section of electrically large and realistically complex targets. The method is based on iterative refinement of the first-order physical optics currents to include multiple interactions up to a specified order. Unlike other high-frequency asymptotic methods, no ray tracing is required, and spurious diffraction effects from non-physical shadow boundaries are avoided. Numerical results are presented to demonstrate convergence, accuracy, efficiency and robustness. Index Terms─ Physical optics, radar cross section, iterative methods, integral equations, highfrequency methods.

[1]  W. Sha,et al.  HIGH FREQUENCY SCATTERING BY AN IMPENE- , 2009 .

[2]  Kyung-Tae Kim,et al.  Construction of Training Database Based on High Frequency RCS Prediction Methods For ATR , 2008 .

[3]  R. Burkholder,et al.  Forward-backward iterative physical optics algorithm for computing the RCS of open-ended cavities , 2005, IEEE Transactions on Antennas and Propagation.

[4]  M. Cátedra,et al.  Calculation of the RCS from the double reflection between planar facets and curved surfaces , 2003 .

[5]  S. Velamparambil,et al.  10 million unknowns: is it that big? [computational electromagnetics] , 2003, IEEE Antennas and Propagation Magazine.

[6]  Fernando Obelleiro,et al.  Iterative physical‐optics formulation for analyzing large waveguides with lossy walls , 2001 .

[7]  Carretera de Valencia,et al.  The finite element method in electromagnetics , 2000 .

[8]  John L. Volakis,et al.  Fast RCS pattern fill using AWE technique , 1998 .

[9]  Gene H. Golub,et al.  Matrix computations (3rd ed.) , 1996 .

[10]  B. Stupfel,et al.  A fast-domain decomposition method for the solution of electromagnetic scattering by large objects , 1996 .

[11]  Weng Cho Chew,et al.  Fast far field approximation for calculating the RCS of large objects , 1995, IEEE Antennas and Propagation Society International Symposium. 1995 Digest.

[12]  Robert J. Burkholder,et al.  An iterative physical optics approach for analyzing the electromagnetic scattering by large open-ended cavities , 1995 .

[13]  R. Coifman,et al.  The fast multipole method for the wave equation: a pedestrian prescription , 1993, IEEE Antennas and Propagation Magazine.

[14]  G. D. Crabtree,et al.  A numerical quadrature technique for physical optics scattering analysis , 1991 .

[15]  Shyh-Kang Jeng,et al.  High frequency scattering from trihedral corner reflectors and other benchmark targets: SBR versus experiment , 1991 .

[16]  Hao Ling,et al.  High-frequency RCS of open cavities with rectangular and circular cross sections , 1989 .

[17]  P. Pathak.  Techniques for High-Frequency Problems , 1988 .

[18]  Roger F. Harrington,et al.  Field computation by moment methods , 1968 .