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ABSTRACT
This article deals with Radar Cross Section (RCS) measurements in anechoic chambers. The first part introduces the basic concepts of RCS and the measurement setups allowing this type of experimentation in France. The design of such an experimental setup in an anechoic chamber is then explained. The RCS measurement protocol and the associated data processing are detailed. The last part concerns the radar imaging of a target from RCS measurements, which allows the analysis of the different contributing factors influencing the RCS.
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Read the articleAUTHORS
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Fabrice COMBLET: Senior Lecturer ENSTA Bretagne - Lab-STICC UMR CNRS 6285, ENSTA Bretagne, Brest, France
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Franck DAOUT: Senior Lecturer IUT/UFR SITEC Ville-d'Avray - IUT/UFR SITEC Ville-d'Avray, Ville-d'Avray, France - SATIE Laboratory, UMR CNRS 8029, ENS CACHAN, UniverSud Paris
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Christelle EYRAUD: Senior Lecturer Aix-Marseille University - Aix-Marseille University, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France
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Jean-Michel GEFFRIN: CNRS Research Engineer - Aix-Marseille University, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France
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Pierre MASSALOUX: Research engineer - CEA/CESTA, Le Barp, France
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Gérard-Pascal PIAU: Senior Expert - AIRBUS Group Innovation, Suresnes, France
INTRODUCTION
As part of the GDR Ondes-supported working group on anechoic chamber measurement uncertainties (GTi), involving engineers and researchers from industry, major government agencies and academic research laboratories, a five-year collaborative study was carried out on the uncertainties affecting electromagnetic field measurements. This study was carried out on both radar equivalent surface (RES) and antenna measurements. This collaborative effort was an opportunity to appreciate the small number of contributions to the literature on experimental techniques for measuring RES in anechoic chambers, and the difficulty of gaining a precise overview of the current techniques used in each field. Numerous publications deal with various aspects of radar: target detection, design of targets with low "response" (quantified in the form of radar equivalent area), so-called stealth targets, radar signal processing, radar imaging. However, the experimental aspect of radar equivalent area measurement is rarely addressed in these contributions, and constitutes the objective of this manuscript.
In this article, the basic concepts of radar equivalent surface (RES) measurement are introduced, and a few examples of French experimental setups for making these measurements are presented. Next, the design of an anechoic chamber RES measurement system is explained. The SER measurement technique and associated processing are then described in detail. The final section deals with radar imaging techniques.
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KEYWORDS
measurement | radar cross section | anechoic chamber | microwave instrumentation
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Radar equivalent surface (SER) measurement
Radar equivalent surface (SER)
Bibliography
Software tools
Software for calculating the far-field zone for a given target size and for sizing the instrumentation of an anechoic chamber from the Ville-d'Avray IUT design office (supplied in appendices):
http://cdn.techniques-ingenieur.fr/natifs/te6714/annexes.zip
Websites
Network of users of microwave anechoic chambers (RUCH) : http://www.fresnel.fr/rca/
GDR Ondes :
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