Dual-Polarized Planar Feed for Low-Profile Hemispherical Luneburg Lens Antennas

A dual-polarized planar feed antenna suitable for illuminating a hemispherical Luneburg lens on a ground plane operating at Ku band is presented. Compared to a waveguide feed, the planar antenna has the advantage of reducing the overall profile of the lens system. The planar feed is realized using a...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2012-01, Vol.60 (1), p.402-407
Main Authors: Weily, A. R., Nikolic, N.
Format: Article
Language:English
Subjects:
Antenna measurements
Antennas
Applied sciences
Array antenna
Arrays
Design engineering
Directivity
Exact sciences and technology
Feeds
Gain
Ground plane
Lenses
Luneburg lens
Microstrip
microstrip antenna
Microstrip antenna arrays
Microstrip antennas
Patch antennas
planar antenna
Radiocommunications
Satcom-on-the-move (SOTM)
Satellite telecommunications. Space telecommunications
Telecommunications
Telecommunications and information theory
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Description
Summary:A dual-polarized planar feed antenna suitable for illuminating a hemispherical Luneburg lens on a ground plane operating at Ku band is presented. Compared to a waveguide feed, the planar antenna has the advantage of reducing the overall profile of the lens system. The planar feed is realized using a 2 × 2 array of stacked patches, and orthogonal polarizations of the patches use different coupling methods to increase isolation between the two ports of the device. Simulated S-parameters, radiation patterns, gain, directivity, and efficiency of the planar feed are compared with measured results. Measured radiation patterns and gain are also presented for a commercial Luneburg lens illuminated by the planar feed, to characterize the combined lens/feed performance and to validate the utility of the planar feed design.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2011.2167941