Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1998-01-09
1999-06-08
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342 72, 342 73, 342 82, G01S 1360, G01S 1393
Patent
active
059107863
ABSTRACT:
When a transmitted and received radio wave is scanned, even if, for example, a large vehicle is running on an adjacent lane, a preceding vehicle running on the same lane as an own vehicle can be sensed and tracked continually. An on-vehicle radar comprises a transmitter receiver 6 for transmitting and receiving a radio wave with a relatively high frequency, and a signal processor 10 calculating a relative distance to an object and a relative velocity of the object on the basis of a radio wave transmitted by the transmitter receiver, reflected from the object, and received by the transmitter receiver. The transmitter receiver controls the power of a transmitted radio wave so that when a radio wave is to be transmitted in any transmission direction other than a specified transmission direction, the power of the transmitted radio wave will be made lower than that of a radio wave to be transmitted in the specified transmission direction, or even if the power of a received radio wave is larger than a given value, the power of the transmitted radio wave will not be decayed, and that when a radio wave is to be transmitted in the specified transmission direction, if the power of a received radio wave is larger than the given value, the power of the radio wave transmitted by the transmitter receiver will be decayed.
REFERENCES:
patent: 5481268 (1996-01-01), Higgins
patent: 5517196 (1996-05-01), Pakett et al.
patent: 5565870 (1996-10-01), Fukuhura et al.
patent: 5751240 (1998-05-01), Fujita et al.
patent: 5815112 (1998-09-01), Sasaki et al.
Mitsubishi Denki & Kabushiki Kaisha
Sotomayor John B.
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