Velocity sensor and ground vehicle velocity sensor using the...

Details Velocity sensor and ground vehicle velocity sensor using the... Velocity sensor and ground vehicle velocity sensor using the...

2007-12-18

2007-12-18

Gregory, Bernarr E. (Department: 3662)

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

Determining velocity

C342S070000, C342S115000, C342S175000, C342S195000

Reexamination Certificate

active

11207004

ABSTRACT:
There is provided a highly accurate velocity sensor having a reduced detection error. A sensor circuit unit generates an electromagnetic wave and emits it from a transmission antenna. Furthermore, a reception antenna receives a reflection wave from the ground and a mixer mixes it with a local signal, thereby generating a low-frequency signal. The electromagnetic wave emitted from the sensor circuit unit shapes a beam by a dielectric lens before emitting it toward the ground. Here, the beam shape is such that the beam width in the vicinity of the sensor is smaller than the beam width in the vicinity of the ground.

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