Automobile anti-collision radar array antenna

Abstract

The invention discloses an automobile anti-collision radar array antenna. The automobile anti-collision radar array antenna comprises a four-transmitting four-receiving radar chip bonding pad, a firstreceiving linear antenna array, a second receiving linear antenna array, a third receiving linear antenna array, a fourth receiving linear antenna array, a first transmitting linear antenna array, asecond transmitting linear antenna array, a third transmitting linear antenna array, a fourth transmitting linear antenna array and a transmitting power division matching network. The core architecture of the automobile anti-collision radar array antenna adopts a four-transmitting four-receiving antenna array mode, and adopts six slot corner cut patch array elements with same phase and same amplitude as a basic unit structure to control the size and the position of an antenna parasitic unit, reasonably suppress the sidelobe level of the antenna, optimize the radiation characteristic of the antenna and improve the impedance matching characteristic.

Description

Technical field[0001]The invention relates to the technical field of vehicle-mounted millimeter wave radar antennas, in particular to an automobile collision avoidance radar array antenna.Background technique[0002]In recent years, as a breakthrough advanced driver assistance system technology necessary for future driverless technology, vehicle-mounted millimeter-wave radar technology is developing rapidly. Compared with optical cameras and lidars, vehicle-mounted millimeter-wave radars have all-weather detection capabilities that are not afraid of rain, fog, dust and haze, and have long detection distances. They also have the advantages of high resolution and small size. Vehicle-mounted radars are divided into three types according to distance: long-range, medium-range and short-range. Long-range radars usually use high-gain antennas to achieve long-distance detection requirements, but their field of view (FOV) is also rapidly decreasing, so they usually can only cover the detection...

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Problems solved by technology

[0003] At present, the existing automotive millimeter-wave radar structure on the market mainly adopts the traditional microstrip line series-fed structure or series-fed array structure, the radiation characteristics of the antenna are difficult to control, and the processing consistency is poor; the suppression of the sidelobe level needs to be improved , the angular resolution ability is poor; the single TX-RX reflection path has the interference factor of the target echo amplitude fluctuation; it does not have the function of synchronous detection in the horizontal and vertical directions, and cannot meet the indicators of the millimeter-wave radar system scheme for medium-range and long-range detection need

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