Far-Field Radar Cross Section Determination Using Near-Field ISAR-Imaging Techniques

Conference: EUSAR 2006 - 6th European Conference on Synthetic Aperture Radar
05/16/2006 - 05/18/2006 at Dresden, Germany

Proceedings: EUSAR 2006

Pages: 4Language: englishTyp: PDF

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Vaupel, Thomas (FGAN-FHR, Wachtberg, Germany)
Eibert, Thomas F. (University of Stuttgart, Stuttgart, Germany)

Inverse synthetic aperture radar (ISAR) imaging is a powerful tool for the characterization of radar targets. Since the direct determination of the far-field radar cross section (RCS) typically requires expensive arrangements and equipment, short distance ISAR imaging of the radar targets has been proposed as alternative method, where the resulting near-field images can be used to extract the far-field radar cross section of the target. This contribution compares the performance of different near-field imaging techniques together with a new approach and accuracy improvements. Furthermore, a detailed insight in the imaging process is given, leading to reliable sampling rules, thus together with calibration and focusing techniques a complete concept for accurate far-field RCS extraction is given.