Method and apparatus for passive direction finding with sideband

Details Method and apparatus for passive direction finding with sideband Method and apparatus for passive direction finding with sideband

1991-07-15

1992-09-15

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

G01S 504

Patent

active

051481804

ABSTRACT:
A method and apparatus are provided for passive direction finding that demines the sideband and angle of arrival of an incoming radio signal. A four-channel superheterodyne receiver generates quadrature between the radio signals received by each channel. Four inphase/quadrature phase detectors are connected to the receiver for generating inphase and quadrature components of the electrical phase differences between antenna elements of the receiver. The inphase and quadrature components are used for sideband determination and the electrical phase differences are used to derive the angle of arrival.

REFERENCES:
patent: 4305074 (1981-12-01), Barzana et al.
patent: 4870420 (1989-09-01), Apostolos
patent: 5010343 (1991-04-01), Andersson

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