High-gain automobile millimeter-wave radar array antenna

Abstract

The invention discloses a high-gain automobile millimeter wave radar array antenna. The high-gain automobile millimeter wave radar array antenna comprises a millimeter wave radar chip interface, a first receiving linear array antenna, a second receiving linear array antenna, a third receiving linear array antenna, a fourth receiving linear array antenna, a transceiving isolation linear array antenna, a first transmitting linear array antenna, a second transmitting linear array antenna, a third transmitting linear array antenna and a fourth transmitting linear array antenna. The core architecture of the high-gain automobile millimeter wave radar array antenna adopts a four-transmitting and four-receiving antenna array mode, adopts eight angle-feed array elements with same phase and same amplitude as a transmitting unit, and combines a combination method of tangential circular polarization and surface slotting of a symmetrical structure to reasonably suppress the sidelobe level of the antenna, control the size and the position of an antenna parasitic unit, optimize the radiation characteristic of the antenna and improve the impedance matching characteristic. The high-gain automobilemillimeter wave radar array antenna has the advantages of high precision, high response speed, high resolution, high stability, miniaturization and low cost, and can be used for medium-distance and long-distance detection millimeter wave radar system schemes.

Description

technical field [0001] The invention relates to the technical field of automotive millimeter-wave radar antennas, in particular to a high-gain automotive millimeter-wave radar array antenna. Background technique [0002] In recent years, automotive millimeter-wave radar technology has been developing rapidly as an advanced driver assistance system technology necessary for breakthrough future driverless technology. Compared with optical cameras and laser radars, vehicle-mounted millimeter-wave radars have all-weather detection capabilities that are not afraid of rain, fog, dust and haze, and have a long detection distance. At the same time, they have the advantages of high resolution and small size. Vehicle-mounted radars are divided into three main 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...

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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 target echo amplitude fluctuation, which cannot meet the index requirements of the millimeter-wave radar system scheme for medium-range and long-range detection

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