Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1981-06-11
1984-07-03
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
H01Q 322, H01Q 324, H01Q 326
Patent
active
044582471
ABSTRACT:
The present invention relates to a technique for enabling an antenna system to linearly scan over a wide angle of an orbital arc segment from a terrestrial ground station to access or track satellites within the segment. The wide angle linear scan capability is achieved by orienting the antenna system at the ground station relative to the local terrestrial coordinate system such that the axis normal to the aperture plane of the antenna system is at a predetermined angle and lies in a plane substantially parallel to the plane of the orbital arc segment. Then, by squinting the beam toward the orbital arc segment by applying a fixed linear phase taper to the antenna elements of a planar phased array along one axis of the array, linear scanning of the orbital arc segment is possible by, for example, varying the linear phase taper applied to antenna elements along another axis of the array.
REFERENCES:
patent: 2245660 (1941-06-01), Feldman et al.
patent: 3349398 (1967-10-01), Werth
patent: 3806930 (1974-04-01), Gobert
patent: 3836970 (1974-09-01), Reitzig
patent: 3852763 (1974-12-01), Kreutel et al.
Skolnik, M. I., Introduction to Radar Systems, McGraw-Hill Book Co., N.Y., 1962, Sec. 7.7, (pp. 294 thru 320).
Skolnik, M. I., Radar Handbook, McGraw-Hill Book Co., N.Y., 1970, pp. 11-1 thru 11-21 and 32-1 thru 32-32.
Bell Telephone Laboratories Incorporated
Blum Theodore M.
Pfeifle Erwin W.
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