Planar metamaterial-based beam-scanning broadband microwave antenna
- IEF, CNRS, UMR 8622, Univ. Paris-Sud, 91405 Orsay Cedex (France)
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.
- OSTI ID:
- 22275542
- Journal Information:
- Journal of Applied Physics, Vol. 115, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hyperbolic-metamaterial antennas for broadband enhancement of dipole emission to free space
Subwavelength silicon through-hole arrays as an all-dielectric broadband terahertz gradient index metamaterial