76.5GHz vehicle-mounted 4D radar antenna capable of suppressing sidelobe by using parasitic unit

Abstract

The invention provides a 76.5GHz vehicle-mounted 4D radar antenna capable of suppressing the sidelobe by using a parasitic unit, which is provided with a dielectric substrate, a radiation patches, a feed structure and a parasitic unit structure, wherein the dielectric constant of the dielectric substrate is 3.04, and the thickness is 0.127mm; the radiation patches are rectangular microstrip patches and connected in series according to the E-plane direction to form linear arrays, each linear array is formed by connecting two radiation patches in series, there are two linear arrays in total, andtwo linear arrays constitute a 2*2 microstrip array antenna through the feed structure; and the parasitic unit structure is similar to the feed structure and located above the radiation patches in amode of being in mirror symmetry with the feed structure. The 76.5GHz vehicle-mounted 4D radar antenna has a beam coverage range of + / -20 degrees in the pitching and horizontal directions, can reducesidelobe suppression interference through the parasitic unit structure, is simple to manufacture and can meet vehicle-mounted 4D radar imaging requirements.

Description

technical field [0001] The invention relates to the technical field of millimeter wave antennas, in particular to a microstrip array antenna for vehicle-mounted 4D imaging. Background technique [0002] Compared with traditional antennas, microstrip antennas have many irreplaceable advantages. It is characterized by small size, light weight, low profile, compact structure, and stable performance, and is widely used in radar and communication fields. Traditional vehicle-mounted radars are basically ordinary 3D radars. They detect a plane and then add speed. Due to the limitation of the elevation beam width, higher targets cannot be detected. Ordinary millimeter-wave radar antennas cannot have the same wide beam range in the pitch and horizontal directions. Usually, the horizontal beam range is wide and the pitch direction is narrow, which cannot meet the requirements of 4D imaging. Contents of the invention [0003] The purpose of the present invention is to propose a low...

AI Technical Summary

Problems solved by technology

Traditional vehicle-mounted radars are basically ordinary 3D radars. They detect a plane and then add speed. Due to the limitation of pitch beam width, higher targets cannot be detected.

Ordinary millimeter-wave radar antennas cannot have the same wide beam range in the pitch and horizontal directions. Usually, the horizontal beam range is wide and the pitch direction is narrow, which cannot meet the requirements of 4D imaging.

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