ASAR-antenna synthetic aperture radar imaging

The antenna synthetic aperture radar (ASAR) imaging concept is introduced. We present the ASAR imaging algorithm to pinpoint the locations of secondary scattering off a platform from antenna radiation data. It is shown that a three-dimensional (3-D) ASAR image of the platform can be formed by invers...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 1998-12, Vol.46 (12), p.1845-1852
Main Authors: Ozdemir, C., Bhalla, R., Trintinalia, L.C., Hao Ling
Format: Article
Language:English
Subjects:
Antenna radiation patterns
Aperture antennas
Computational electromagnetics
Electromagnetic scattering
Frequency
Multifrequency antennas
Radar antennas
Radar polarimetry
Radar scattering
Ray tracing
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Summary:The antenna synthetic aperture radar (ASAR) imaging concept is introduced. We present the ASAR imaging algorithm to pinpoint the locations of secondary scattering off a platform from antenna radiation data. It is shown that a three-dimensional (3-D) ASAR image of the platform can be formed by inverse Fourier transforming the multifrequency, multiaspect far-field radiation data from an antenna mounted on the platform. This concept is demonstrated using the computed radiation data from the code Apatch, which employs the shooting and bouncing ray (SBR) technique. Furthermore, we develop a fast ASAR algorithm specially tailored for the SBR approach. By taking advantage of the ray tracing information within the SBR engine, we demonstrate that the fast approach can result in the same quality of image as the frequency-aspect algorithm at only a fraction of the computation time.
ISSN:0018-926X
1558-2221
DOI:10.1109/8.743822