Large Metasurface Aperture for Millimeter Wave Computational Imaging at the Human-Scale

J. N. Gollub, O. Yurduseven, K. P. Trofatter, D. Arnitz, F. M. Imani, T. Sleasman, M. Boyarsky, A. Rose, A. Pedross-Engel, H. Odabasi, T. Zvolensky, G. Lipworth, D. Brady, D. L. Marks, M. S. Reynolds, D. R. Smith

Research output: Contribution to journalArticlepeer-review

114 Scopus citations

Abstract

We demonstrate a low-profile holographic imaging system at millimeter wavelengths based on an aperture composed of frequency-diverse metasurfaces. Utilizing measurements of spatially-diverse field patterns, diffraction-limited images of human-sized subjects are reconstructed. The system is driven by a single microwave source swept over a band of frequencies (17.5-26.5 GHz) and switched between a collection of transmit and receive metasurface panels. High fidelity image reconstruction requires a precise model for each field pattern generated by the aperture, as well as the manner in which the field scatters from objects in the scene. This constraint makes scaling of computational imaging systems inherently challenging for electrically large, coherent apertures. To meet the demanding requirements, we introduce computational methods and calibration approaches that enable rapid and accurate imaging performance.

Original languageEnglish (US)
Article number42650
JournalScientific reports
Volume7
DOIs
StatePublished - Feb 20 2017

ASJC Scopus subject areas

  • General

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