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

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 elem...

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Bibliographic Details
Published in:Optics express 2018-03, Vol.26 (5), p.5281-5291
Main Authors: Yurduseven, Okan, Marks, Daniel L, Fromenteze, Thomas, Smith, David R
Format: Article
Language:English
Subjects:
Electromagnetism
Engineering Sciences
Signal and Image processing
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.26.005281