Doppler radar system

Details Doppler radar system Doppler radar system

1975-11-12

1977-10-11

Tubbesing, T.H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 7YC, G01S 944

Patent

active

040538877

ABSTRACT:
A Doppler radar system for controlling portable traffic signals in response to on-coming traffic. Each of two channel amplifiers of the system is fixed at high gain and passes both noise signals and Doppler signals to a phase detector. A threshold element provides a control signal when the average level of the phase detector output between high and low levels changes sufficiently, due to the presence of Doppler signals, from a mean level which is due to noise alone.

REFERENCES:
patent: 3832709 (1974-08-01), Klein et al.
patent: 3845461 (1974-10-01), Foreman
patent: 3896436 (1975-07-01), Johnson

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