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Chapitre D'ouvrage Année : 2021

Radar cross-section estimation in reverberation chambers

Résumé

This chapter is dedicated to recent advances in a rather unexplored range of applications. It deals with the ability of performing radar cross-section (RCS) measurements, using a reverberation chamber (RC). If feasible, it would allow broadband measurements in a simple Faraday cage at a much lower cost, absorbers being no longer required. However, using a RC for RCS measurement seems inadequate at a first glance. Adding an object under test in the chamber consists in introducing another scatterer, indistinguishable in a rich multipath environment offered by the RC. Chapter Contents: • 9.1 Definition of radar cross section and the radar equation • 9.2 Radar cross-section measurements • 9.3 Scattered cross section and antenna patterns in reverberation chambers • 9.4 Theory of radar cross-section pattern measurements in reverberation chambers • 9.4.1 Measurement setup • 9.4.2 Backscattered field in an empty RC • 9.4.3 Backscattered field from the target • 9.4.4 The backscattered coefficient • 9.4.5 RCS equation of the target • 9.4.6 Extraction of RCS • 9.5 Validation on simple targets • 9.5.1 Preliminary measurements in anechoic chamber • 9.5.2 Calibration in RC • 9.5.3 Measurement of the metal plate • 9.5.4 Measurement of a dihedral target • 9.5.5 The role of the stirrer • 9.5.5.1 Changing the stirrer position after empty RC measurement • 9.5.5.2 Multiple RCS measurements at several stirrer positions • 9.6 Discussion • References. © The Institution of Engineering and Technology 2021.
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Dates et versions

hal-03370660 , version 1 (08-10-2021)

Identifiants

Citer

Philippe Besnier. Radar cross-section estimation in reverberation chambers. Electromagnetic Reverberation Chambers: Recent advances and innovative applications, Institution of Engineering and Technology, pp.261-284, 2021, 9781785619311. ⟨10.1049/SBEW544E_ch9⟩. ⟨hal-03370660⟩
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