Vehicle-mounted radar
First Claim
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1. A vehicle-mounted radar, comprising:
- a transmission antenna for radiating a radio wave; and
three antennas including first, second, and third reception antennas for receiving reflected wave of the radio wave from an object, wherein a horizontal width of the second reception antenna is less than a horizontal width of each of the first and third reception antennas.
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Abstract
A vehicle-mounted radar includes a transmission antenna for radiating a radio wave and three antennas including first, second and third reception antennas for receiving reflected wave of the radio wave from an object, wherein a horizontal width of the second reception antenna is less than a horizontal width of each of the first and third reception antennas. It then becomes possible to separately detect two objects, such as two preceding vehicles, each of the rate and distance to the radar mounting vehicle of which is identical with each other, as two objects.
63 Citations
19 Claims
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1. A vehicle-mounted radar, comprising:
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a transmission antenna for radiating a radio wave; and
three antennas including first, second, and third reception antennas for receiving reflected wave of the radio wave from an object, wherein a horizontal width of the second reception antenna is less than a horizontal width of each of the first and third reception antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A vehicle-mounted radar, comprising:
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a transmission antenna for radiating a radio wave; and
first, second, and third reception antennas for receiving reflected wave of the radio wave from an object, wherein;
an overlap range of overlap between a received beam of the first reception antenna and a received beam of the second reception antenna is equal to or more than a predetermined value; and
an overlap range of overlap between the received beam of the second reception antenna and a received beam of the third reception antenna is equal to or more than a predetermined value. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A drive control apparatus for use in a vehicle in which a vehicle-mounted radar is mounted, the radar comprising a transmission antenna for radiating a radio wave, first, second, and third reception antennas for receiving reflected wave of the radio wave from an object, and a horizontal width of the second reception antenna is less than a horizontal width of each of the first and third reception antennas, wherein
a speed of the vehicle is reduced to a predetermined speed when a hindrance is detected in traffic lanes on both sides of a traffic lane of the vehicle on which the radar is installed and any hindrance is not detected in the traffic lane of the vehicle.
Specification