Radar device

Details Radar device Radar device

1982-03-29

1986-09-09

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 11VB, G01S 1358

Patent

active

046112111

ABSTRACT:
The novel radar device (1) radiates triangularly frequency-modulated continuous-wave signals via two radiation patterns (3, 4). If an object (2) is detected by one radiation pattern at a time, relative velocity (V.sub.1, V.sub.2) and distance (r.sub.1, r.sub.2) are measured. The time between the measurements with signals received via the first and the second radiation pattern, respectively, is t. If the velocity of the object (2) relative to the radar device is V.sub.1 =0 when it is detected by the first radiation pattern, the associated distance is r.sub.10. The velocity of the object is determined either by the equation ##EQU1## or by either of the equations ##EQU2## A combination of V.sub.A and V.sub.B is also possible. If the object is so large in extent as to be detected by both radiation patterns simultaneously, switchover between the two radiation patterns is effected at a given clock rate.
If no pairs of values are used at which V.sub.1 =0, the evaluation is performed in accordance with either of the equations ##EQU3##

REFERENCES:
patent: 4038658 (1977-07-01), Nelson et al.

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