Communications: directive radio wave systems and devices (e.g. – Determining velocity
Reexamination Certificate
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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Kondoh Hiroshi
Nagasaku Toshiyuki
Shinoda Hiroshi
Gregory Bernarr E.
Hitachi , Ltd.
Mattingly, Stanger Malur & Brundidge PC
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