Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1983-11-17
1992-08-25
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
343911L, H01Q 322, H01Q 324, H01Q 326
Patent
active
051422905
ABSTRACT:
A wideband shaped beam antenna having steep beam edge slopes in one plane is disclosed. An optical multiple beam antenna such as a geodesic lens antenna, a Luneberg lens or a circular folded pillbox, is coupled at selected points to a feed system having a power divider and phasing control. Coupling of the feed system to the optical multiple beam antenna is effected with a power transition having a wide frequency bandwidth and a capability of conducting high power levels. To shape the beam further, selected beams may be amplitude weighted. An aperture control device such as an E-plane sectoral horn, is attached when required, to narrow the beamwidth in the E-plane. By overlapping multiple beams of the optical multiple beam antenna in accordance with the invention, a sector beam having a constant position and constant steep edge slopes over an octave frequency bandwidth is obtained.
REFERENCES:
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"The Geodesic Luneberg Lens" by Richard C. Johnson, The Microwave Journal, Aug., 1962, pp. 76-85.
"A Solution of the Problem of Rapid Scanning for Radar Antennae" by R. F. Rinehart, Journal of Applied Physics, vol. 19, Sep., 1948 pp. 860-862.
Blum Theodore M.
Denson-Low Wanda K.
Hughes Aircraft Company
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