Communications: radio wave antennas – Antennas – Switching between antennas and lines
Patent
1982-12-10
1985-03-05
Lieberman, Eli
Communications: radio wave antennas
Antennas
Switching between antennas and lines
343356, 455 73, H01Q 324
Patent
active
045034362
ABSTRACT:
A feed element-to-beam interconnection network is provided for an antenna that transmits and receives a large number of beams, such as 87 contiguous narrow beams that cover the United States. The network, which is connected to a layer of 134 feed elements that transmit and receive microwaves, consists of a pair of circuit boards (160c, 162c in FIG. 7) parallel to the feed element layer. One of the two boards has 87 dividers (e.g. 51td, FIG. 5) that each divide a signal to be transmitted into seven portions, and the other board has 134 combiners (e.g. 38tc) that each collect seven transmit signal portions and deliver the sum to one of the feed elements. A similar arrangement is used to handle received signals, with 134 receive signal dividers (e.g. 38rd) on the one board, and 87 receive signal combiners (e.g. 51rc) on the other board. The large number of interconnections are made by printed circuit conductors radiating from each of the numerous dividers and combiners, and by providing interconnection pins (166) that interconnect the ends of pairs of conductors lying on the two boards. The printed circuit conductors (e.g. 38a, 51b) extend in undulating paths that provide maximum separation of conductors to minimize cross talk.
REFERENCES:
patent: 3056961 (1962-10-01), Mitchell
patent: 3747114 (1973-07-01), Shyhalla
patent: 3854140 (1974-12-01), Ranghelli et al.
patent: 4168503 (1979-09-01), Davidson
patent: 4257050 (1981-03-01), Ploussios
Jones Thomas H.
Lieberman Eli
Manning John R.
McCaul Paul F.
The United States of America as represented by the Administrator
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