RF signal direction finding apparatus

Details RF signal direction finding apparatus RF signal direction finding apparatus

1990-03-26

1990-12-18

Blum, Theodore M.

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

Directive

Beacon or receiver

342442, G01S 504

Patent

active

049789635

ABSTRACT:
Angle of arrival of a pulsed RF signal, such as that emitted by a radar transmitter, is determined by use of a detection circuit that contains a single RF receiver. The RF signal direction of arrival determining system contains a switching means to automatically alternately switch the outputs from two physically spaced receiving antennas to the input of the RF tuner. In turn the tuner's output is coupled to a power divider. The output of this power divider is branched, one output being coupled through a first IF amplifier to one of the two inputs of a phase detector and the second output being coupled through a second circuit, containing a delay line and an IF amplifier serially arranged, to the second input of the phase detector. The phase detector displays the phase difference between the two signals.

REFERENCES:
patent: 2841787 (1958-07-01), Knott
patent: 4107692 (1978-08-01), Hutcheon et al.
patent: 4123759 (1978-10-01), Hines et al.
patent: 4358768 (1982-11-01), Ernst et al.
patent: 4855748 (1989-08-01), Brandao et al.

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