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Letter

Lens-Loaded Coded Aperture with Increased Information Capacity for Computational Microwave Imaging

1
Institute of Electronics, Communications and Information Technology, Queen’s University Belfast, Belfast BT3 9DT, UK
2
XLIM, University of Limoges, UMR 7252, F-87000 Limoges, France
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(9), 1531; https://doi.org/10.3390/rs12091531
Received: 15 April 2020 / Revised: 5 May 2020 / Accepted: 7 May 2020 / Published: 11 May 2020
Computational imaging using coded apertures offers all-electronic operation with a substantially reduced hardware complexity for data acquisition. At the core of this technique is the single-pixel coded aperture modality, which produces spatio-temporarily varying, quasi-random bases to encode the back-scattered radar data replacing the conventional pixel-by-pixel raster scanning requirement of conventional imaging techniques. For a frequency-diverse computational imaging radar, the coded aperture is of significant importance, governing key imaging metrics such as the orthogonality of the information encoded from the scene as the frequency is swept, and hence the conditioning of the imaging problem, directly impacting the fidelity of the reconstructed images. In this paper, we present dielectric lens loading of coded apertures as an effective way to increase the information coding capacity of frequency-diverse antennas for computational imaging problems. We show that by lens loading the coded aperture for the presented imaging problem, the number of effective measurement modes can be increased by 32% while the conditioning of the imaging problem is improved by a factor of greater than two times. View Full-Text
Keywords: microwaves; imaging; radar; metasurface; frequency-diversity; lens; singular value decomposition microwaves; imaging; radar; metasurface; frequency-diversity; lens; singular value decomposition
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MDPI and ACS Style

Yurduseven, O.; Abbasi, M.A.B.; Fromenteze, T.; Fusco, V. Lens-Loaded Coded Aperture with Increased Information Capacity for Computational Microwave Imaging. Remote Sens. 2020, 12, 1531. https://doi.org/10.3390/rs12091531

AMA Style

Yurduseven O, Abbasi MAB, Fromenteze T, Fusco V. Lens-Loaded Coded Aperture with Increased Information Capacity for Computational Microwave Imaging. Remote Sensing. 2020; 12(9):1531. https://doi.org/10.3390/rs12091531

Chicago/Turabian Style

Yurduseven, Okan, Muhammad A.B. Abbasi, Thomas Fromenteze, and Vincent Fusco. 2020. "Lens-Loaded Coded Aperture with Increased Information Capacity for Computational Microwave Imaging" Remote Sensing 12, no. 9: 1531. https://doi.org/10.3390/rs12091531

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