Skip to main content
Journal cover image

Single-frequency microwave imaging with dynamic metasurface apertures

Publication ,  Journal Article
Sleasman, T; Boyarsky, M; Imani, MF; Fromenteze, T; Gollub, JN; Smith, DR
Published in: Journal of the Optical Society of America B: Optical Physics
August 1, 2017

Conventional microwave imaging schemes, enabled by the ubiquity of coherent sources and detectors, have traditionally relied on frequency bandwidth to retrieve range information, while using mechanical or electronic beamsteering to obtain cross-range information. This approach has resulted in complex and expensive hardware when extended to large-scale systems with ultrawide bandwidth. Relying on bandwidth can create difficulties in calibration, alignment, and imaging of dispersive objects. We present an alternative approach using electrically large, dynamically reconfigurable, metasurface antennas that generate spatially distinct radiation patterns as a function of tuning state. The metasurface antenna consists of a waveguide feeding an array of metamaterial radiators, each with properties that can be modified by applying a voltage to diodes integrated into the element. By deploying two of these apertures, one as the transmitter and one as the receiver, we realize sufficient spatial diversity to alleviate the dependence on frequency bandwidth and obtain range and cross-range information using measurements at a single frequency. We experimentally demonstrate this proposal by using two 1D dynamic metasurface apertures and reconstructing various 2D scenes (range and cross-range). Furthermore, we modify a conventional reconstruction method—the range migration algorithm—to be compatible with such configurations, resulting in an imaging system that is efficient in software and hardware. The imaging scheme presented in this paper has broad application to radio frequency imaging, including security screening, through-wall imaging, biomedical diagnostics, and synthetic aperture radar.

Duke Scholars

Altmetric Attention Stats
Dimensions Citation Stats

Published In

Journal of the Optical Society of America B: Optical Physics

DOI

EISSN

1520-8540

ISSN

0740-3224

Publication Date

August 1, 2017

Volume

34

Issue

8

Start / End Page

1713 / 1726

Related Subject Headings

  • Optics
  • 5108 Quantum physics
  • 5102 Atomic, molecular and optical physics
  • 4008 Electrical engineering
  • 0906 Electrical and Electronic Engineering
  • 0205 Optical Physics
  • 0102 Applied Mathematics
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Sleasman, T., Boyarsky, M., Imani, M. F., Fromenteze, T., Gollub, J. N., & Smith, D. R. (2017). Single-frequency microwave imaging with dynamic metasurface apertures. Journal of the Optical Society of America B: Optical Physics, 34(8), 1713–1726. https://doi.org/10.1364/JOSAB.34.001713
Sleasman, T., M. Boyarsky, M. F. Imani, T. Fromenteze, J. N. Gollub, and D. R. Smith. “Single-frequency microwave imaging with dynamic metasurface apertures.” Journal of the Optical Society of America B: Optical Physics 34, no. 8 (August 1, 2017): 1713–26. https://doi.org/10.1364/JOSAB.34.001713.
Sleasman T, Boyarsky M, Imani MF, Fromenteze T, Gollub JN, Smith DR. Single-frequency microwave imaging with dynamic metasurface apertures. Journal of the Optical Society of America B: Optical Physics. 2017 Aug 1;34(8):1713–26.
Sleasman, T., et al. “Single-frequency microwave imaging with dynamic metasurface apertures.” Journal of the Optical Society of America B: Optical Physics, vol. 34, no. 8, Aug. 2017, pp. 1713–26. Scopus, doi:10.1364/JOSAB.34.001713.
Sleasman T, Boyarsky M, Imani MF, Fromenteze T, Gollub JN, Smith DR. Single-frequency microwave imaging with dynamic metasurface apertures. Journal of the Optical Society of America B: Optical Physics. 2017 Aug 1;34(8):1713–1726.
Journal cover image

Published In

Journal of the Optical Society of America B: Optical Physics

DOI

EISSN

1520-8540

ISSN

0740-3224

Publication Date

August 1, 2017

Volume

34

Issue

8

Start / End Page

1713 / 1726

Related Subject Headings

  • Optics
  • 5108 Quantum physics
  • 5102 Atomic, molecular and optical physics
  • 4008 Electrical engineering
  • 0906 Electrical and Electronic Engineering
  • 0205 Optical Physics
  • 0102 Applied Mathematics