Communications: radio wave antennas – Antennas – Wave guide type
Patent
1982-08-30
1985-01-01
Lieberman, Eli
Communications: radio wave antennas
Antennas
Wave guide type
343914, H01Q 1919
Patent
active
044918488
ABSTRACT:
The present invention relates to an antenna arrangement which uses a large offset spherical main reflector to communicate with several, spaced-apart, remote locations. Large aberrations caused by the main reflector are corrected by a first subreflector forming a small image of the main reflector at a conjugate image surface and a second subreflector which is disposed at the image location and is shaped to correct for the aberrations caused by the main reflector. Such correction is, to a good approximation, frequency independent and provides aberration free operation at feeds adjacent each other and associated with remote locations having small differential angles of incidence on the center of the main reflector.
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AT&T Bell Laboratories
Lieberman Eli
Pfeifle Erwin W.
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