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The ultra-wideband pulse diffraction features on impedance wedge

Keywords:

A.F. Kriachko – Dr. Sc. (Eng.), Professor, Head of Department, Saint-Petersburg State University of Aerospace Instrumentation. E-mail: Alex_k34.ru@mail.ru I.E. Tyurin – Ph. D. (Eng.), Associate Professor, Department of Radio Technical and Optoelectronic Complex, Saint-Petersburg State University of Aerospace Instrumentation. E-mail: tyurin_i@mail.ru K.V. Antonov – Post-graduate Student, Department of Radio Technical and Optoelectronic Complex, Saint-Petersburg State University of Aerospace Instrumentation. E-mail: kartovan@gmail.com A.S. Kovalev – Post-graduate Student, Department of Radio Technical and Optoelectronic Complex, Saint-Petersburg State University of Aerospace Instrumentation. E-mail: kaf21@guap.ru


In case of UWB radiolocation the probe pulse scattering at selected local centers largely determines the nature of the total field dif-fraction. Under certain conditions, the main contribution to the total effective scattering cross-section of the complex geometric shapes object makes scattering on its edges and kinks. Therefore practically important is the study of UWB pulse diffraction on the impedance wedge which in some cases can be used as an electrodynamic model in study of real object edges scattering. Currently have been well developed methods for solving diffraction problems for electromagnetic field in the mode of steady-harmonic oscillations. Much more difficult to resolve diffraction problems in cases of none sinusoidal primary source field. For solving such an unsteady problems was developed various methods. Most of them are based on the superposition principle which is used for solving any linear differential equations. It seems appropriate to use the frequency method in some cases. The main advantage of this method is a possibility of applying known solutions, which have been found for non-stationary scattering study of monochromatic waves diffraction. The resulting field defines as a superposition of responses to elementary spectral components UWB pulse impact.
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