Polarization correction and extension of the Kennaugh-Cosgriff target-ramp response equation to the bistatic case and applications to electromagnetic inverse scattering

• Published in: IEEE transactions on antennas and propagation Vol. 38; no. 7; pp. 964 - 972
• Main Authors: Foo, B.Y., Chaudhuri, S.K., Boerner, W.-M.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.1990; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Diffraction, scattering, reflection; Electromagnetic analysis; Electromagnetic scattering; Electromagnetic wave polarization; Equations; Exact sciences and technology; Inverse problems; Magnetic separation; Optical scattering; Optical transmitters; Physical optics; Radiocommunications; Radiowave propagation; Telecommunications; Telecommunications and information theory; Time domain analysis; Conducting body; Approximation; Time domain method; Pulse response; Electromagnetic wave; Wave scattering
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/8.55606

An analytical time-domain expression derived by Kennaugh (1967) for the early time impulse response for smooth, convex, perfectly conducting scatterers under the physical optics approximation for the bistatic case is reinterpreted. The physical optics bistatic early time impulse responses can be interpreted as cross-sectional areas of the scatterer. A crude polarization correction to the leading edge of the physical optics impulse response is obtained for the bistatic case, leading to a simple asymptotic relation between the specular principal curvature difference and certain co-polarized phase terms in the bistatic scattering matrix. Applications to direct scattering are discussed. Profile reconstruction from bistatic data with a priori knowledge of the validity range of physical optics in the time domain is proposed and tested with the sphere.< >