Luneburg lens


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Luneburg lens

[′lü·nə‚bərg ‚lenz]
(electromagnetism)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Hao, "Slim Luneburg lens for antenna applications," Optics Express, vol.
These COWs will feature some of the highest capacity antennas in AT&T's fleet, including the Giant Eyeball Antenna (also known as the Luneburg Lens Antenna), AT&T added.
TO has been used to design new and creative devices for conventional EM applications such as invisibility cloaks, perfect lens and flattened Luneburg lens [3-6].
Australia has been investigating a type of antenna known as the Luneburg lens. In collaboration with Russian astronomers, CSIRO has obtained a small prototype lens from a Moscow-based company.
is focused on the beam-steering capabilities of a simplified flat Luneburg lens operating at 60 GHz.
For example, the inhomogeneous refractive index of the Luneburg lens has been realized by drilling electrically small holes into a dielectric [2], by using pressed foam material [3], and by employing several homogeneous shells [4].
One area that has garnered much attention is the use of TrE to change the shape of a (quasi) optical device (lens or reflector), whilst maintaining the electromagnetic performance by changing the spatial variation of the permittivity (and permeability, in some cases); one example of the power of TrE in this regard is the Luneburg lens [25].
The Luneburg lens [25], which has the capability of all-angles can regardless of the frequency of operation, as well as excellent focusing characteristics, is an attractive candidate for many applications such as multi-beam antennas, multi-frequency scanning, and spatial scanning [26,27].
Cui, "Broadband planar Luneburg lens based on complementary metamaterials," Applied Physics Letters, vol.
Cui, "Beam-steering Vivaldi antenna based on partial Luneburg lens constructed with composite materials," Journal of Applied Physics, Vol.