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Scattering from an electrically large object having impedance boundaries is evaluated using the approximate high frequency technique, iterative physical optics (IPO) together with the multilevel fast multipole method (MLFMM), a fast hybrid technique. For example, radar cross section (RCS) of an airplane with size of about 78λ×85λ×28λ λbeing the wavelength at the operation frequency of 1GHz is computed...
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