Space-Time Integral Equation Approach to the Large Body Scattering Problem.
SPERRY RAND RESEARCH CENTER SUDBURY MASS
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N, FREQUENCY RESPONSE, ELECTROMAGNETIC SCATTERINGThe space-time integral equation approach is extended to the solution of the large body problem for smooth convex targets. This is accomplished by the development of the impulse response augmentation technique that combines the smoothed impulse response, which is computed exactly with the space-time integral equation, and known features of the returns from the specular point, the join regions, and the creeping wave. This technique produces a total impulse response and the frequency response over the entire spectrum. Results are obtained for the sphere, the prolate spheroid, and the sphere-capped cylinder for axial incidence and are found to be in good agreement with available data. In addition, the polarization dependent effects on the leading edge of the impulse response are determined for the case of nonaxial incidence on smooth convex targets. Results are presented for the impulse response and frequency response of the prolate spheroid and the sphere-capped cylinder for nonaxial incidence with both polarizations. Modified author abstract
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