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W-band sparse imaging system using frequency diverse cavity-fed metasurface antennas

Publication ,  Journal Article
Zvolensky, T; Gowda, VR; Gollub, J; Marks, DL; Smith, DR
Published in: IEEE Access
January 1, 2018

We experimentally demonstrate a frequency-diverse, computational imaging system at W-band frequencies utilizing an array of cavity-fed metasurface antennas. Each metasurface antenna consists of a cavity milled from aluminum stock, with an upper plate patterned with a set of radiating slots. As a function of frequency, the metasurface cavities produce a set of spatially diverse radiation patterns that probe the reflectivity distribution of a scene. The antennas are designed to maximize the measurement diversity and hence imaging capacity of the system. The number and distribution of the radiating slots is optimized by balancing the cavity quality factor (Q) and Fourier space coverage. In the experimental realizations, the radiation patterns from each cavity-fed metasurface antenna is first measured using near-field scanning techniques, propagated over the imaging domain, and then stored for use in the image reconstruction step. Comprehensive alignment procedure is implemented to align the measured radiation patterns with regard to the physical position of the cavities. Using a modeling platform, we find excellent agreement between the simulation and experiment, indicating the validity of the calibration and alignment procedures. The scaling of the cavity-fed metasurface antenna represents a key step in the development of alternative high-frequency apertures for imaging and beam-forming applications.

Duke Scholars

Published In

IEEE Access

DOI

EISSN

2169-3536

Publication Date

January 1, 2018

Volume

6

Start / End Page

73659 / 73668

Related Subject Headings

  • 46 Information and computing sciences
  • 40 Engineering
  • 10 Technology
  • 09 Engineering
  • 08 Information and Computing Sciences
 

Citation

APA
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ICMJE
MLA
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Zvolensky, T., Gowda, V. R., Gollub, J., Marks, D. L., & Smith, D. R. (2018). W-band sparse imaging system using frequency diverse cavity-fed metasurface antennas. IEEE Access, 6, 73659–73668. https://doi.org/10.1109/ACCESS.2018.2883402
Zvolensky, T., V. R. Gowda, J. Gollub, D. L. Marks, and D. R. Smith. “W-band sparse imaging system using frequency diverse cavity-fed metasurface antennas.” IEEE Access 6 (January 1, 2018): 73659–68. https://doi.org/10.1109/ACCESS.2018.2883402.
Zvolensky T, Gowda VR, Gollub J, Marks DL, Smith DR. W-band sparse imaging system using frequency diverse cavity-fed metasurface antennas. IEEE Access. 2018 Jan 1;6:73659–68.
Zvolensky, T., et al. “W-band sparse imaging system using frequency diverse cavity-fed metasurface antennas.” IEEE Access, vol. 6, Jan. 2018, pp. 73659–68. Scopus, doi:10.1109/ACCESS.2018.2883402.
Zvolensky T, Gowda VR, Gollub J, Marks DL, Smith DR. W-band sparse imaging system using frequency diverse cavity-fed metasurface antennas. IEEE Access. 2018 Jan 1;6:73659–73668.

Published In

IEEE Access

DOI

EISSN

2169-3536

Publication Date

January 1, 2018

Volume

6

Start / End Page

73659 / 73668

Related Subject Headings

  • 46 Information and computing sciences
  • 40 Engineering
  • 10 Technology
  • 09 Engineering
  • 08 Information and Computing Sciences