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Angle-resolving radar sensor

A radar sensor and angle resolution technology, applied in the field of radar sensors, can solve problems such as the increase in the cost of computing power hardware and the increase in the number of analysis and processing channels.

Pending Publication Date: 2021-04-09
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the number of analysis processing channels required thereby also increases, thereby increasing the required computing power and thus hardware costs

Method used

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  • Angle-resolving radar sensor

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Embodiment Construction

[0028] exist figure 1 , a radar sensor with a quasi-regular antenna array 10 with 8 antenna elements 12 is shown in diagrammatic form. Each antenna element 12 is formed by a column of 8 antenna patches 14 fed in series extending in the vertical direction z. The column-shaped antenna elements 12 are arranged in a row in a scanning direction y, which in a radar sensor for a motor vehicle corresponds to the horizontal transverse direction of the vehicle, so that the radar sensor has an angular resolution in azimuth. The distances between the antenna elements 12 and the distances between the individual antenna patches 14 of each column are specified in units of the wavelength λ of the radar radiation. The spacing between pairs of adjacent antenna elements 12 is also figure 1 are quantitatively specified and each have a value of approximately 2, but have a deviation of less than 7% from the mean value of 2.00.

[0029] The width of the antenna array 10 in the scanning direction ...

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Abstract

The invention relates to an angle-resolving radar sensor with an antenna array (10) which has a number (N) of antenna elements (12) that are offset relative to one another in a scanning direction (y), a digital beam-forming device (20), and an angle-estimating device (22) which is designed to estimate an angle on the basis of the signal of the beam-forming device (20). The invention is characterized in that the aperture (A) of the antenna array (10) is greater than (N-1) / 2 in units of wavelength (lambda), and the center-to-center distances between adjacent antenna elements (12) vary but not by more than a specified degree of the value A / (N-1).

Description

technical field [0001] The invention relates to an angle-resolved radar sensor with an antenna array having N antenna elements offset from one another in the scanning direction, the angle The estimation device is designed to perform an angle estimation based on the signal of the beam shaping device. Background technique [0002] Radar sensors are used in motor vehicles, for example, to measure distances, relative speeds and azimuth angles of vehicles or other objects positioned in front of the own vehicle. The individual antennas are then arranged at a distance from one another, for example on the horizon, so that different azimuth angles of located objects result in differences in the propagation lengths that the radar signal has to travel from the object to the corresponding antenna. These propagation length differences lead to corresponding differences in the phases of the signals received by the antenna elements and evaluated in the associated evaluation channels. Then...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/931G01S7/35G01S13/34H01Q3/26H01Q21/06G01S13/02
CPCG01S7/354G01S2013/0245G01S13/34H01Q3/26H01Q21/065G01S13/931G01S13/345
Inventor M·朔尔M·迈尔
Owner ROBERT BOSCH GMBH