Dynamically reconfigurable holographic metasurface aperture for a Mills-Cross monochromatic microwave camera

Okan Yurduseven, Daniel Marks, Thomas Fromenteze, David Smith

Research output: Contribution to journalArticle

28 Citations (Scopus)
269 Downloads (Pure)

Abstract

We present a reconfigurable, dynamic beam steering holographic metasurface aperture to synthesize a microwave camera at K-band frequencies. The aperture consists of a 1D printed microstrip transmission line with the front surface patterned into an array of slot-shaped subwavelength metamaterial elements (or meta-elements) dynamically tuned between “ON” and “OFF” states using PIN diodes. The proposed aperture synthesizes a desired radiation pattern by converting the waveguide-mode to a free space radiation by means of a binary modulation scheme. This is achieved in a holographic manner; by interacting the waveguide-mode (reference-wave) with the metasurface layer (hologram layer). It is shown by means of full-wave simulations that using the developed metasurface aperture, the radiated wavefronts can be engineered in an all-electronic manner without the need for complex phase-shifting circuits or mechanical scanning apparatus. Using the dynamic beam steering capability of the developed antenna, we synthesize a Mills-Cross composite aperture, forming a single-frequency all-electronic microwave camera.
Original languageEnglish
Pages (from-to)1-11
JournalOptics Express
Volume26
Issue number5
DOIs
Publication statusPublished - 21 Feb 2018
Externally publishedYes

Keywords

  • Imaging
  • Computational Imaging
  • microwaves
  • Metasurfaces
  • Antennas

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