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Title: Planar metamaterial-based beam-scanning broadband microwave antenna

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 °. Far-field measurements agree qualitatively with calculated near-field distributions.
Authors:
 [1] ; ;  [1] ;  [2]
  1. IEF, CNRS, UMR 8622, Univ. Paris-Sud, 91405 Orsay Cedex (France)
  2. (France)
Publication Date:
OSTI Identifier:
22275542
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; ANTENNAS; COMPOSITE MATERIALS; DIELECTRIC MATERIALS; LENSES; MASKING; MICROWAVE RADIATION; PHOTON EMISSION; REFRACTIVE INDEX; SUBSTRATES