Ground-speed Doppler radar for vehicles

Details Ground-speed Doppler radar for vehicles Ground-speed Doppler radar for vehicles

1980-07-14

1982-10-12

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 8, G01S 1358

Patent

active

043541917

ABSTRACT:
A Doppler radar wherein, in order to measure the ground speed of an automobile, microwaves are radiated to the ground and the Doppler shift of reflected waves from the ground is detected, characterized in that to the end of avoiding a malfunction ascribable to an external microwave interference, when the differentiated output of the Doppler radar is greater than a threshold value, the frequency of the microwaves of the Doppler radar is controlled so as to prevent the microwave interference from taking place.

REFERENCES:
patent: 3118140 (1964-01-01), Vladimir et al.
patent: 3713151 (1973-01-01), Kofsky
patent: 3992709 (1976-11-01), Wantanabe et al.

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