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Cavity-backed metasurface antennas and their application to frequency diversity imaging.

Publication ,  Journal Article
Marks, DL; Yurduseven, O; Smith, DR
Published in: Journal of the Optical Society of America. A, Optics, image science, and vision
April 2017

Frequency diversity antennas with spatially structured radiation patterns reduce the reliance on actively switched elements for beamforming which become increasingly expensive and impractical as frequency increases. As the quality factor Q of a frequency diverse antenna increases, the antenna samples more spatial structure as the number of unique radiated coded spatial patterns correspondingly increases. Antennas that combine hollow cavities and metamaterial apertures achieve both large fractional bandwidth, in excess of 40%, and a high Q of 1600, so that each antenna radiates over 640 unique coded patterns. As compared to switched active antennas, such a passive antenna replaces the 50 antennas and switches that would produce at most (50/2)2=625 unique patterns. Furthermore, the engineered metamaterial apertures enable a radiation efficiency exceeding 60% to be achieved in a single desired polarization. The theory of cavity-backed metasurface antennas is explained, and frequency diverse imaging is demonstrated with a pair of these antennas.

Duke Scholars

Published In

Journal of the Optical Society of America. A, Optics, image science, and vision

DOI

EISSN

1520-8532

ISSN

1084-7529

Publication Date

April 2017

Volume

34

Issue

4

Start / End Page

472 / 480

Related Subject Headings

  • Optics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
  • 1113 Opthalmology and Optometry
  • 0906 Electrical and Electronic Engineering
  • 0205 Optical Physics
 

Citation

APA
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ICMJE
MLA
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Marks, D. L., Yurduseven, O., & Smith, D. R. (2017). Cavity-backed metasurface antennas and their application to frequency diversity imaging. Journal of the Optical Society of America. A, Optics, Image Science, and Vision, 34(4), 472–480. https://doi.org/10.1364/josaa.34.000472
Marks, Daniel L., Okan Yurduseven, and David R. Smith. “Cavity-backed metasurface antennas and their application to frequency diversity imaging.Journal of the Optical Society of America. A, Optics, Image Science, and Vision 34, no. 4 (April 2017): 472–80. https://doi.org/10.1364/josaa.34.000472.
Marks DL, Yurduseven O, Smith DR. Cavity-backed metasurface antennas and their application to frequency diversity imaging. Journal of the Optical Society of America A, Optics, image science, and vision. 2017 Apr;34(4):472–80.
Marks, Daniel L., et al. “Cavity-backed metasurface antennas and their application to frequency diversity imaging.Journal of the Optical Society of America. A, Optics, Image Science, and Vision, vol. 34, no. 4, Apr. 2017, pp. 472–80. Epmc, doi:10.1364/josaa.34.000472.
Marks DL, Yurduseven O, Smith DR. Cavity-backed metasurface antennas and their application to frequency diversity imaging. Journal of the Optical Society of America A, Optics, image science, and vision. 2017 Apr;34(4):472–480.
Journal cover image

Published In

Journal of the Optical Society of America. A, Optics, image science, and vision

DOI

EISSN

1520-8532

ISSN

1084-7529

Publication Date

April 2017

Volume

34

Issue

4

Start / End Page

472 / 480

Related Subject Headings

  • Optics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
  • 1113 Opthalmology and Optometry
  • 0906 Electrical and Electronic Engineering
  • 0205 Optical Physics