Target position radar

Details Target position radar Target position radar

1985-11-04

1988-05-10

Tarcza, Thomas H.

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

Determining velocity

Combined with determining direction

G01S 902

Patent

active

047439084

ABSTRACT:
A traffic radar unit capable of looking past the lead vehicle of oncoming traffic and discovering and identifying a violator employs master and slave antennas having diverging boresights that provide overlapping relative power density radiation patterns. The radar return signal from a target of interest is received by each antenna to produce two independent Doppler signals of the same frequency which are processed by respective master and slave signal processing channels. In the illustrated embodiment, a reference boresight is established in the overlapped patterns such that a target position along the reference boresight occurs at the time that the amplitudes of the two Doppler signals are equal. Controllable high pass filters whose passbands are shifted upwardly in response to return signals of increasing amplitude attenuate stronger, lower frequency interfering signals. The presence of a second Doppler signal in either channel having a frequency near the signal of interest causes the receiver to abort the tracking mode.

REFERENCES:
patent: 3438031 (1969-04-01), Fathauer
patent: 3689921 (1972-09-01), Berry
patent: 3936824 (1976-02-01), Aker et al.
patent: 4110754 (1978-08-01), Endo
patent: 4214243 (1980-07-01), Patterson
patent: 4293859 (1981-10-01), Sergent

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