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An original 3-D radar imaging system is presented for radar cross section (RCS) analysis, i.e., to identify and characterize the radar backscattering components of an object. Based on a 3-D spherical experimental setup, where the residual echo signal is more efficiently reduced in the useful zone, it is especially adapted to deal with low-RCS analysis. Due to a roll rotation, the electric field direction...
Radar Cross Section analysis is the study of the scattering behavior of an object. The objective is to determine the main scatterers from measurements of the backscattered electric field. It is generally achieved by Radar Cross Section imaging. This leads to an ill-posed inverse problem because the system to solve is underdetermined. It is then necessary to regularize the problem by adding prior information...
Under certain circumstances, plasmonic coatings could be a solution to the design of stealthy targets over the microwave range. In this communication, Perfectly Electrically Conducting (PEC) spheres with plasmonic coatings are studied in the microwave spectrum. Two main issues are raised. The first one is related to the fact that the exact computation of the Radar Cross Section (RCS) of finely textured...
Indoor RCS measurement facilities are usually dedicated to the characterization of only one azimuth cut and one elevation cut of the full spherical RCS target pattern.
Indoor RCS measurement facilities are usually dedicated to the characterization of only one azimuth cut and one elevation cut of the full spherical RCS target pattern. In order to perform more complete characterizations, a spherical experimental layout has been developed at CEA for indoor Near-Field monostatic RCS assessment. This experimental layout is composed of a 4 meters radius motorized rotating...
This paper details a RCS measurement technique and the numerical post processing of raw RCS data in order to analyze the localization of the scatterers of the target under test. A specific 3D radar imaging method is developed and applied from the fast 3D spherical near field scans.
Radar Cross Section (RCS) measurements of a target should be useful for each orientation angle of the target. Usually, measurements in an anechoic chamber on a classical styrofoam mast provide RCS data as a function of only one roll and one elevation cuts. In order to characterize full 3D near field monostatic RCS of small targets, an indoor experimental layout has been developed in CEA/CESTA. This...
Last year we presented [1] during IEEE-APS 2012. In this article we reminded the principle of the Near Fear Far Field Transformation (NFFFT) (that we presented during IEEE-APS 2009) and quantified the degree of approximation of this Transformation.
During IEEE-APS 2009 we presented [1]. In this article we demonstrated the possibility to calculate an approximation of the far field in a given bearing ϑ ∈ [0; 2π] from measurements of near fields the bearings of which were located in [ϑ − π over 2, ϑ + π over 2]. We then quickly explained how to calculate this far field thanks to a convolution product. In this paper we propose to go further in the...
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