Radar detector/security device for automobiles

Details Radar detector/security device for automobiles Radar detector/security device for automobiles

1987-12-29

1988-12-13

Tubbesing, T. H.

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

Radar ew

Detection of surveilance

342 28, 340554, G01S 742, G01S 1356

Patent

active

047914203

ABSTRACT:
A radar detector/security device for cars in which the antenna structure of a radar wave detection circuit that drives a warning means when a radar wave is detected is utilized to radiate a local oscillation signal and receive a signal reflected from a dielectric body. The Doppler shift produced by the movement of the dielectric body is detected as a beat component of the local oscillation signal. This beat component causes an incorporated security function to activate a security circuit. The radar detection circuit or the security circuit can be selectively utilized.

REFERENCES:
patent: 4090195 (1978-05-01), Guennou et al.
patent: 4275390 (1981-06-01), Heywang et al.
patent: 4295131 (1981-10-01), Bonori et al.
patent: 4565446 (1986-01-01), Close
patent: 4622553 (1986-11-01), Baba et al.
patent: 4668952 (1987-05-01), Imazeki et al.

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