Far-Field Radar Cross-Section Determination From Near-Field 3-D
Synthetic Aperture Imaging With Arbitrary Antenna Scanning Surfaces
This article has been accepted for publication in IEEE Transactions on
Antennas and Propagation.
T. Watanabe and H. Yamada, “Far-Field Radar Cross-Section Determination
From Near-Field 3-D Synthetic Aperture Imaging With Arbitrary
Antenna-Scanning Surfaces,” IEEE Transactions on Antennas and
Propagation, doi: 10.1109/TAP.2022.3161491.
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In this study, we propose a generalized algorithm for far-field radar
cross-section determination by using 3-D synthetic aperture imaging with
arbitrary antenna-scanning surfaces. This method belongs to a class of
techniques called image-based near-field-to-far-field transformation.
The previous image-based approaches have been formulated based on a
specific antenna-scanning trajectory or surface, such as a line, plane,
circle, cylinder, and sphere; majority of these approaches consider 2-D
radar images to determine the azimuth radar cross-section. We generalize
the conventional image-based technique to accommodate an arbitrary
antenna-scanning surface and consider a 3-D radar image for radar
cross-section prediction in both the azimuth and zenith directions. We
validate the proposed algorithm by performing numerical simulations and
anechoic chamber measurements.