Communications: radio wave antennas – Antennas – Plural antennas spaced a fractional or full wave length apart
Patent
1982-09-09
1990-06-12
Hille, Rolf
Communications: radio wave antennas
Antennas
Plural antennas spaced a fractional or full wave length apart
343853, 342424, H01Q 2108
Patent
active
049336827
ABSTRACT:
In a point to point microwave communication service including a microwave antenna system at each point directed at the other point, the radiation pattern of the antenna system at at least one point has a substantial null in the direction of an antenna of another microwave communication service to avoid an exchange of signals with the other service, the antenna system provided at said one point includes two antenna elements having substantially equal directional radiation patterns, so oriented and spaced apart a distance that is at least several wave length of the operating frequency of the elements so that the radiation patterns of the elements overlap producing a net radiation pattern that results from interference of the patterns and the net pattern has a substantial lobe in the direction of the other point of said service and a substantial null in the direction of an antenna of the other microwave communication service.
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patent: 2033271 (1936-03-01), Aiken
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patent: 4304464 (1981-12-01), Hill et al.
patent: 4397558 (1983-08-01), Hill et al.
patent: 4415902 (1983-11-01), Redlich
Dunn Robert T.
Hille Rolf
Wimer Michael C.
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