UDC 621.3.095, 537.874
Regularities
of bistatic scattering from metal triangle
A. M. Lebedev 1,
M. L. Obukhov 2, I. A. Selin 1, T. A. Furmanova 1
1 Institute for
Theoretical and Applied Electromagnetics of the Russian Academy of Sciences, 13
Izhorskaya, Moscow, 125412, Russia
2 Moscow Institute of Physics and Technology (National Research University), 9 Institutskiy
per., Dolgoprudny, Moscow Region, 141701, Russia
The paper is received
on November 26, 2019
Abstract. All maximums of
spatial distribution of metal triangle’s bistatic radar cross section are structured
into sequences of diffraction cones, each of them having one edge of triangle
as an axis. The major cone of the sequence has the highest RCS level, and its
cone-satellites’ RCS level reduces in succession. For the cone’s sequences, resulted
from primary diffraction by the triangle’s edges, the major cones are the cones
of diffracted rays. Maximums of bistatic RCS are observed in direction of the
ray, reflected from the triangle, and in shadow direction, - both directions simultaneously
belong to all three cones of diffracted rays around the edges of triangle. The scattered
field on the cone of diffracted rays is formed as a sum of cophasal contributions
from the edge elements. Subsequent cones-satellites are formed as sums of
contributions from the edge elements, divided into 3, 5, 7 and so
forth Fresnel zones. Surface currents, generated in primary diffraction by the triangle’s
edges, run toward the other edges and also form additional sequences of
diffraction cones. Besides, sequences of diffraction cones, caused by the edge
waves movement in opposite directions along the triangle’s edges, are observed
too. Main effects of secondary diffraction result exactly from the surface
currents and the edge waves running onto, correspondingly, the edges and the
vertices of triangle.
Key words: bistatic radar cross section, diffraction cones, Fresnel zones, primary
and secondary diffraction, surface current, edge wave.
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For citation:
Lebedev A.M., Obukhov
M.I., Selin I.A., Furmanova T.A. Regularities of bistatic scattering from metal triangle.
Zhurnal Radioelektroniki - Journal of Radio Electronics. 2019.
No. 12. Available
at http://jre.cplire.ru/jre/dec19/15/text.pdf
DOI 10.30898/1684-1719.2019.12.15