A novel 3-D imaging technique for interferometric circular SAR system

This paper introduces an interferometric circular synthetic aperture radar (CSAR) system for three dimensional (3-D) imaging of targets. A new interferometric CSAR method is presented by using the phase difference between a pair of two dimensional (2-D) CSAR images which are reconstructed from data obtained at two distinct circular apertures. Compared with the conventional interferometric SAR along a straight path, this imaging mode can be used not only to detect the hidden target in the scene, but also to improve the resolution of SAR system. To demonstrate the imaging capabilities of this approach, an indoor experiment is conducted within microwave chamber at X-band frequencies (8-12 GHz).