DocumentCode :
978158
Title :
Beam elevation positioning in geodesic lenses
Author :
Rudduck, R.C. ; Ryan, C.E., Jr. ; Walter, C.H.
Author_Institution :
Ohio State University, Columbus, OH, USA
Volume :
12
Issue :
6
fYear :
1964
fDate :
11/1/1964 12:00:00 AM
Firstpage :
678
Lastpage :
684
Abstract :
A class of circularly symmetric geodesic lens antennas are considered in which each lens can be designed for any single beam elevation position. This paper investigates a method for controlling beam elevation in a single lens. The beam is positioned in elevation by radial feed movement and the theory for off-focus behavior of geodesic lenses is given. Since the beam can also be scanned around the symmetry axis, volumetric coverage is possible. A particular lens design ( \\beta =40\\deg , r_{1}=0.82 ) is given by which the beam can be positioned over a wide range of beam elevations. A TEM lens model and a dual polarization lens model using both TEM and TE_{01} modes were tested at X -band. The beam was positioned from an angle of 25\\deg with respect to the plane of the lens rim to broadside for the TEM mode by simply moving the feed from near the rim to the center of the lens.
Keywords :
Lens antennas; Apertures; Azimuth; Feeds; Lenses; Microwave antennas; Optical design; Polarization; Shape; Testing; Variable speed drives;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1964.1138295
Filename :
1138295
Link To Document :
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