Communications: radio wave antennas – Antennas – Wave guide type
Patent
1986-07-15
1989-01-17
Sikes, William L.
Communications: radio wave antennas
Antennas
Wave guide type
343853, 342372, H01Q 326
Patent
active
047990651
ABSTRACT:
A reconfigurable beam antenna system (12) comprises focusing means, a plurality of antenna elements (A, B, C, and D), a feed network (14), and a variable beam controlling means (16). The focusing means has a reflecting surface (18) which is adapted to reflect a plurality of electromagnetic energy signals. The feed network (14) comprises a plurality of feed ports (I1, I2, I3, and I4), a first plurality of hybrid couplers (30 and 32) connected to the feed ports, a plurality of phase shifters (34 and 36) connected to the first plurality of hybrid couplers, a second plurality of hybrid couplers 38 and 40 connected to both the first plurality of hybrid couplers and the phase shifters, and a plurality of antenna ports (01, 02, 03 and 04) connected to both the second plurality of hybrid couplers and the antenna elements (A, B, C, and D). The variable beam controlling means comprises a variable phase shifter (50) connected to one of the feed ports, a variable power coupler (60) connected to both another feed port and the variable phase shifter, and a plurality of channel network means (CH1, CH2, CH3 and CH4) connected to the variable power coupler.
REFERENCES:
patent: 3707719 (1972-12-01), Mark
patent: 4041501 (1977-08-01), Frazita et al.
patent: 4231040 (1980-10-01), Walker
patent: 4315262 (1982-02-01), Acampora
patent: 4471361 (1984-09-01), Profera, Jr. et al.
Hughes Aircraft Company
Johnson Doris J.
Karambelas A. W.
Meltzer M. J.
Mitchell S. M.
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