INVERSE SCATTERING INVESTIGATION
Quarterly rept. no. 4, 3 Oct 1967-3 Jan 1968
MICHIGAN UNIV ANN ARBOR RADIATION LAB
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The plane wave representation is generalized in terms of a three- dimensional Fourier transform, to yield an expression, which when combined with the incident field, gives the total electric field everywhere inside and outside non-magnetic scattering bodies. This representation requires the knowledge of the scattering matrix and its analytic continuation in the frequency domain. The use of short pulse data to determine the properties of uniformly coated bodies is considered, where the main attention is applied to the illuminated portion of smooth convex bodies at high frequencies. Computational results are obtained, establishing the conditions that are required to determine the surface of a conducting body from knowledge of the total near field. It is shown for the cases treated sphere and prolate spheroid, that two separate conditions are required. One of these conditions yields a single surface which is an approximation to the proper surface, whereas, the other condition yields a set of surfaces, among which is the exact surface.
- Radiofrequency Wave Propagation