Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1993-06-18
1994-05-24
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342 13, G01S 736
Patent
active
053153073
ABSTRACT:
The technique allows precise angle-of-arrival (AOA) and radio frequency measurements on non-cooperative radar signals, by exploiting precise phase measurement capabilities of frequency measurement receivers. It is assumed that the intercept receivers with this capability are on board an aircraft and there are at least two antennas available. By utilizing the phase measurements, the incident frequency and incident phase angle are calculated using formulae derived under the disclosed technique. By taking multiple samples and averaging, angle measurement errors can be reduced.
REFERENCES:
patent: 3735400 (1973-05-01), Sletten et al.
patent: 3812493 (1974-05-01), Afendykiw et al.
patent: 4746924 (1988-05-01), Lightfoot
patent: 4825213 (1989-04-01), Smrek
Pequignot Nicholas A.
Shaw Rudy L.
Tsui James B. Y.
Franz Bernard E.
Hellner Mark
Kundert Thomas L.
The United States of America as represented by the Secretary of
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