Radar device

Abstract

Provided is a radar device capable of improving target object detection accuracy. The reception antenna includes a plurality of first antennas disposed at different positions in a first direction, a plurality of second antennas disposed at different positions in a second direction orthogonal to the first direction, and a third antenna different from the first and second antennas. At least one of the plurality of first antennas overlaps with any one of the plurality of second antennas. The third antenna is arranged at a position different from the arrangement position of the plurality of first antennas in the second direction and spaced apart from the arrangement position of the plurality of second antennas in the first direction by a predetermined interval. At least one interval among the plurality of first antennas is a predetermined interval. The transmission antennas include a plurality of fourth antennas arranged in the first direction and a plurality of fifth antennas arranged in the second direction. At least one of the plurality of fourth antennas overlaps with any one of the plurality of fifth antennas. The interval between the plurality of fourth antennas in the first direction is greater than the aperture length of the plurality of first antennas.

Description

technical field [0001] The present disclosure relates to radar devices. Background technique [0002] In recent years, radar devices using short-wavelength radar transmission signals including microwaves and millimeter waves capable of obtaining high resolution have been advanced. In addition, in order to improve safety outdoors, it is required to develop a radar device that detects small objects such as pedestrians in addition to vehicles in a wide-angle range (for example, it is called a "wide-angle radar device"). [0003] As a structure of a radar device having a wide-angle detection range, for example, there is a structure using a method (Arrival Angle Estimation Method. Direction of Arrival (DOA) estimation) in which a plurality of antennas (or, also called "antenna elements" ) to receive the reflected wave from the target (or called "target"), and estimate the direction of arrival of the reflected wave based on the received phase difference relative to the element sp...

AI Technical Summary

Problems solved by technology

[0014] However, there is still room for research on methods to improve the angle measurement performance of radar devices (e.g., MIMO radar)

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