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A new technique to compute the physical optics (PO) integral is presented. The technique consists of a blind code that computes the different contributions (stationary phase points, end points, etc.) numerically. This technique is based on a decomposition of the surface into small triangles and a fast evaluation of each triangle by means of a deformation of the integration path in the complex plane...
A new 3D fast physical optics method is presented for computing the diffracted field by a conducting plate with arbitrary contour. This is a fast and accurate method both in low and high frequency. It is expected to unify the efficient calculation of PO integrals with the same method valid in all frequencies. This method combines Morse theory with complex variable techniques.
A new fast physical optics method is introduced for computing backscattered fields at high frequencies. A stokes-type method is presented for computing highly oscillatory integrals a over simplex from extremal points and the stationary phase points of the simplex. The computational cost of the scattering integral behaves as O(1) with frequency
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