High-gain millimeter-wave radar antenna with wide horizontal view field range

Abstract

The invention discloses a high-gain millimeter-wave radar antenna with a wide horizontal view field range. The antenna comprises an input power division matching network, a first angle feed radiationunit, a second angle feed radiation unit, a third angle feed radiation unit, a fourth angle feed radiation unit and a fifth angle feed radiation unit. According to the antenna of the invention, a corearchitecture is composed of the five same-amplitude 45-degree linear polarization angle feed microstrip patch array element structures; with a combination method of angle feed radiation and surface slotting adopted, the horizontal field angle beam width of the antenna is reasonably expanded,; the side lobe of the antenna is reduced, and the cross polarization of the antenna is improved; the efficiency of a series-fed standing wave array is high; the structure of the antenna is compact; the loss of a long transmission line in the market is avoided; the noise coefficient of an automobile radaris reduced; the detection sensitivity and the overall detection performance of the radar are improved; the antenna is of a five-element structure, therefore, the size of the antenna is small, and therefore, circuit integration and equipment miniaturization are facilitated.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted millimeter-wave radar antennas, in particular to a high-gain millimeter-wave radar antenna with a wide horizontal field of view. Background technique [0002] Since the birth of radar technology, the application of radar products in various industries has become more and more popular. With the continuous maturity of radio frequency chip technology, more and more radar sensors are used in the field of active safety of vehicles and general aircraft. Vehicle-mounted millimeter-wave radar is a radar installed on a car to implement functions such as obstacle measurement, collision prediction, and adaptive cruise control. It can effectively reduce driving difficulty, reduce driver burden, and reduce the incidence of accidents. , and thus has been widely used in the automotive field. The detection distance and field of view of vehicle-mounted millimeter-wave radar usually require a trade-off de...

AI Technical Summary

Problems solved by technology

[0003] At present, the existing automotive millimeter-wave radar structure on the market mainly adopts the traditional microstrip line series feed structure or series feed array structure, and the field of view is limited, which cannot meet the application requirements of certain wide field of view for cruise or ranging.

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