Automobile anti-collision radar array antenna

Abstract

The invention discloses an automobile anti-collision radar array antenna which comprises a one-to-eight phase-shifting impedance matching network, a first quaternary equal-amplitude linear array, a second quaternary equal-amplitude linear array, a third quaternary equal-amplitude linear array, a fourth quaternary equal-amplitude linear array, a fifth quaternary equal-amplitude linear array, a sixth quaternary equal-amplitude linear array, a seventh quaternary equal-amplitude linear array and an eighth quaternary equal-amplitude linear array. According to the invention, the core architecture adopts an area array structure composed of eight in-phase quaternary equal-amplitude linear arrays; a one-to-eight centimeter matching network of a symmetrical phase shift structure, a multi-layer substrate design structure and a TSV interconnection technology are combined, the signal interference of the antenna feeder line structure on an antenna resonance unit is reasonably avoided; and meanwhile,the sidelobe level is effectively suppressed, the size and the position of an antenna parasitic unit are controlled, the radiation characteristic of the antenna is optimized, the impedance matching characteristic is improved, the loss of a long transmission line in the market is solved, the radar detection sensitivity and the overall detection performance are improved, and circuit integration andequipment miniaturization are facilitated.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted high-gain array antennas, in particular to an automotive anti-collision radar array antenna. Background technique [0002] In recent years, with the development of radar technology, the volume of radar has become smaller and smaller, and the cost has been continuously reduced, which makes it possible for radar to be used in the field of automobile collision avoidance. Automobile anti-collision radar is a kind of automobile auxiliary driving system that can provide early warning or directly intervene in the driver's operation temporarily to prevent accidents. Automotive anti-collision radars can be divided into three types: long-range radars, medium-range radars, and short-range radars according to their operating distances. Each type has different requirements for antenna performance. The measurement distance of long-range radar can reach more than 100 meters, and the radar beam is also v...

AI Technical Summary

Problems solved by technology

At present, the existing domestic millimeter wave antenna structure in the domestic market mainly adopts the traditional microstrip line series feed structure or series feed array structure, the transmission line loss is large, and the antenna gain is limited. At present, most domestic radar products still maintain a detection distance of 200 meters The level of left and right cannot meet the application requirements of long-range radar

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