Doppler radar speed sensor

Details Doppler radar speed sensor Doppler radar speed sensor

1992-02-11

1993-04-20

Barron, Jr., Gilberto

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

Determining velocity

With plural beams

342 70, 342192, G01S 1360, G01S 1362

Patent

active

052046826

ABSTRACT:
A Doppler radar speed sensor for a land vehicle comprises a radar transmitter/receiver circuit (1) coupled to an aerial system (2). R.F. energy from a source (3) is transmitted by the aerial system in forward (9) and backward (10) directions and energy reflected from these directions is mixed with a sample of the transmitted energy in a mixer arrangement (8) to yield a pair of Doppler frequency components representative of the vehicle speed. In order to ensure that these components always have mutually different frequencies, and thereby avoid the necessity of constructing the mixer arrangement as a pair of quadrature-related mixers, the forward and backward directions make different angles (.theta.+.DELTA..theta. and .theta.-.DELTA..theta. respectively) with the direction of travel (15).

REFERENCES:
patent: 3371341 (1968-02-01), Stavis
patent: 4050071 (1977-09-01), Clorfeine
patent: 4107680 (1978-08-01), Kaplan
patent: 4389648 (1983-06-01), Luscombe et al.

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