Journal
JOURNAL OF APPLIED PHYSICS
Volume 115, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4876233
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Funding
- EADS Company Foundation through the METAQOPT project [090-AO09-1006]
- EADS Company Foundation
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The broadband directive emission from the use of waveguided metamaterials is numerically and experimentally reported. The metamaterials, which are composed of non-resonant circular complementary closed ring structures printed on a dielectric substrate, are designed to obey the refractive index of a Luneburg lens. An arc array of planar radiating slot antennas placed at the periphery of the lens is used as wave launchers. A prototype of the lens associated with the feed structures has been fabricated using standard lithography techniques. To experimentally demonstrate the broadband focusing properties and directive emissions, far-field radiation patterns have been measured. Furthermore, this metamaterial-based lens can be used to achieve beam-scanning with a coverage of up to 120 degrees. Far-field measurements agree qualitatively with calculated near-field distributions. (C) 2014 AIP Publishing LLC.
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