Proceedings ArticleDOI
Adapting range migration techniques for imaging with metasurface antennas: analysis and limitations
Laura Pulido Mancera,Thomas Fromenteze,Timothy Sleasman,Michael Boyarsky,Mohammadreza F. Imani,Matthew S. Reynolds,David R. Smith +6 more
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TLDR
An adapted version of the range migration algorithm (RMA) for use with dynamic metasurface antennas in image reconstruction, demonstrating the capabilities of the algorithm as a fast reconstruction tool and analyzing the limitations of the presented technique in terms of image quality.Abstract:
Dynamic metasurface antennas are planar structures that exhibit remarkable capabilities in controlling electromagnetic wave-fronts, advantages which are particularly attractive for microwave imaging. These antennas exhibit strong frequency dispersion and produce diverse radiation patterns. Such behavior presents unique challenges for integration with conventional imaging algorithms. We analyze an adapted version of the range migration algorithm (RMA) for use with dynamic metasurfaces in image reconstruction. Focusing on the the proposed pre-processing step, that ultimately allows a fast processing of the backscattered signal in the spatial frequency domain from which the fast Fourier transform can efficiently reconstruct the scene. Numerical studies illustrate imaging performance using both conventional methods and the adapted RMA, demonstrating that the RMA can reconstruct images with comparable quality in a fraction of the time. In this paper, we demonstrate the capabilities of the algorithm as a fast reconstruction tool, and we analyze the limitations of the presented technique in terms of image quality.read more
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Journal ArticleDOI
Development of Fast Fourier-Compatible Image Reconstruction for 3D Near-Field Bistatic Microwave Imaging With Dynamic Metasurface Antennas
Amir Masoud Molaei,Thomas Fromenteze,Vasiliki Skouroliakou,T.V. Hoang,Rupesh Kumar,Vincent Fusco,Okan Yurduseven +6 more
TL;DR: In this paper , a 3D near-field bistatic imaging approach using two one-dimensional (1D) dynamic metasurface antennas as a panel-to-panel model in a Mills Cross structure is presented.
References
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Spotlight synthetic aperture radar : signal processing algorithms
TL;DR: In this article, the authors present a spotlight SAR and polar format algorithm for non-planar motion polar format processing with phase error management and phase error magnitude of phase error requirements on a practical SAR motion sensor moving target effects.
PatentDOI
Coded aperture imaging with uniformly redundant arrays
E. E. Fenimore,Thomas M. Cannon +1 more
TL;DR: Computer simulations show that the URA with significant shot and background noise is vastly superior to random array techniques without noise, and permits a detector which is smaller than its random array counterpart.
Journal ArticleDOI
Metamaterial Apertures for Computational Imaging
John Desmond Hunt,Tom Driscoll,Tom Driscoll,Alex Mrozack,Guy Lipworth,Matthew S. Reynolds,David J. Brady,David R. Smith +7 more
TL;DR: By leveraging metamaterials and compressive imaging, a low-profile aperture capable of microwave imaging without lenses, moving parts, or phase shifters is demonstrated and allows image compression to be performed on the physical hardware layer rather than in the postprocessing stage, thus averting the detector, storage, and transmission costs associated with full diffraction-limited sampling of a scene.
Journal ArticleDOI
3-D radar imaging using range migration techniques
TL;DR: This paper presents a near-field 3-D synthetic aperture radar (SAR) imaging algorithm, an extension of the 2-D range migration algorithm (RMA) that is justified by using the method of the stationary phase (MSP).