Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1984-06-01
1987-01-20
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342417, G01S 502
Patent
active
046383212
ABSTRACT:
The angle of arrival (.theta.) of an RF signal is determined using only two widely spaced antennas (A, B). A coarse/fine measurement system (40) is disclosed wherein the actual time delay between zero-crossings responsive to the same RF carrier cycle within the pulse envelope arriving at each antenna is determined. There is no need for additional antenna pairs with different baselines to otherwise resolve ambiguity.
REFERENCES:
patent: 2489304 (1949-11-01), Marchand et al.
patent: 3383690 (1968-05-01), Keller
patent: 3633205 (1972-01-01), Lee et al.
patent: 3714656 (1973-01-01), Meranda
patent: 3789408 (1974-01-01), Ichihara
patent: 3878381 (1975-04-01), Broder et al.
patent: 3936831 (1976-02-01), Jones
Blum Theodore M.
Cain D.
Eaton Corporation
Ranucci V. J.
Rowe D. A.
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