Automotive radar
First Claim
Patent Images
1. A monopulse radar comprising:
- a transmitting antenna and receiving antennas arranged on the top face of a grounding conductor plate; and
a radar transmitter/receiver apparatus for supplying a signal to the transmitting antenna and detecting the azimuth of an obstacle from signals of a wave reflected by the obstacle and received by the receiving antennas,wherein the azimuth of the obstacle is detected based on at least one of the parameters including amplitude and phase of received signals each received through each of said receiving antennas, andwherein a diffracted wave prevention structure extends along at least two edges of the top face of said grounding conductor plate in a direction of a boundary between said transmitting antenna and said receiving antennas, said diffracted wave prevention structure being arranged to prevent a diffracted wave being generated through radiation from the transmitting antenna, reflection by the obstacle and diffraction at the edges and then being received by the receiving antenna.
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Abstract
An automotive radar having a high level of azimuth accuracy and a broad detectable range by virtue of preventing leaks of unnecessary waves to receiving antennas is to be provided. A transmitting array antenna 1 and receiving array antennas 2a, 2b are arranged on an antenna plate (grounding conductor plate) 3 which serves to ground the antennas, and radio wave absorbers 4 are arranged on two sides of the edges 15 of the antenna plate 3. The radio wave absorbers 4 may be configured of, for instance, a sponge material containing radio wave absorbing grains.
25 Citations
21 Claims
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1. A monopulse radar comprising:
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a transmitting antenna and receiving antennas arranged on the top face of a grounding conductor plate; and a radar transmitter/receiver apparatus for supplying a signal to the transmitting antenna and detecting the azimuth of an obstacle from signals of a wave reflected by the obstacle and received by the receiving antennas, wherein the azimuth of the obstacle is detected based on at least one of the parameters including amplitude and phase of received signals each received through each of said receiving antennas, and wherein a diffracted wave prevention structure extends along at least two edges of the top face of said grounding conductor plate in a direction of a boundary between said transmitting antenna and said receiving antennas, said diffracted wave prevention structure being arranged to prevent a diffracted wave being generated through radiation from the transmitting antenna, reflection by the obstacle and diffraction at the edges and then being received by the receiving antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification