DocumentCode
1040915
Title
A Luneberg lens scanning system
Author
Hollis, J.S. ; Long, M.W.
Author_Institution
Georgia Inst. Tech., Atlanta, GA, USA
Volume
5
Issue
1
fYear
1957
fDate
1/1/1957 12:00:00 AM
Firstpage
21
Lastpage
25
Abstract
A 16,000-mc scanner is described which scans a 
azimuth sector alternately with each of two beams at a rate of 17 scans per beam per second. The beams have half-power vertical and horizontal beamwidths of 
and 
respectively and are separated vertically by an angle of 
. Horizontal collimation of each beam is achieved by a geodesic analog of the two-dimensional Luneberg lens. The lenses feed a section of a semiparabolic cylinder for effecting vertical collimation. Feeding the lenses is a switching system, consisting of two four-way turnstile waveguide switches and a waveguide chopper switch, which gives a scan-time dead-time ratio of 8:1.
azimuth sector alternately with each of two beams at a rate of 17 scans per beam per second. The beams have half-power vertical and horizontal beamwidths of and respectively and are separated vertically by an angle of . Horizontal collimation of each beam is achieved by a geodesic analog of the two-dimensional Luneberg lens. The lenses feed a section of a semiparabolic cylinder for effecting vertical collimation. Feeding the lenses is a switching system, consisting of two four-way turnstile waveguide switches and a waveguide chopper switch, which gives a scan-time dead-time ratio of 8:1.Keywords
Lens antennas; Azimuth; Dielectric losses; Feeds; Frequency; Lenses; Optical refraction; Optical variables control; Radar antennas; Refractive index; Switches;
fLanguage
English
Journal_Title
Antennas and Propagation, IRE Transactions on
Publisher
ieee
ISSN
0096-1973
Type
jour
DOI
10.1109/TAP.1957.1144471
Filename
1144471
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