Antenna parts, automotive radar and automobiles

Abstract

The invention discloses an antenna component, a vehicle-mounted radar and an automobile. The antenna component includes: a dielectric substrate; a coplanar waveguide component formed on one side of the dielectric substrate, an array antenna connected to the coplanar waveguide component, and a beam width adjustment component, wherein , the array antenna includes at least one microstrip feeder and a plurality of array patches arranged on the microstrip feeder, the plurality of array patches are divided into two groups, and the widths of the two groups of array patches are different, and the beam width adjustment components surround the array Antenna arrangement; a back ground plate formed on the other side of the dielectric substrate, the back ground plate covers the coplanar waveguide component, the array antenna and the beam width adjustment component directly below. The antenna component is easy to be arranged on the same surface of the dielectric substrate as the MMIC, which is beneficial to reducing the use area of ​​the dielectric substrate and the overall price of the vehicle radar, and does not need to use a metal structure containing a waveguide cavity, which can reduce the overall quality of the radar.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to an antenna component, a vehicle-mounted radar with the antenna component and a vehicle with the vehicle-mounted radar. Background technique [0002] Due to the advantages of low profile and low cost, microstrip antennas are widely used in various vehicle radars. [0003] In the related technology, a microstrip comb array antenna applied in the 77GHz millimeter wave frequency band is proposed. The array antenna is mainly composed of a waveguide microstrip transition part, a comb radiation array antenna and a dielectric substrate. Among them, the waveguide microstrip transition part It is mainly composed of waveguide short-circuit surface, patch unit and WR12 standard waveguide feeding interface, and the patch unit and WR12 standard waveguide feeding interface are on the front of the dielectric substrate, and the comb radiation array antenna is on the back of the dielectric substr...

AI Technical Summary

Problems solved by technology

[0005] However, as we all know, the unit price of the millimeter-wave dielectric substrate is much higher than that of the low-frequency PCB (Printed Circuit Board, printed circuit board) dielectric substrate. The larger the area used by the millimeter-wave dielectric substrate, the higher the overall price of the radar.

Therefore, using the WR12 standard waveguide feed interface for the above-mentioned microstrip comb array antenna will result in the use of at least two millimeter-wave dielectric substrates, that is, the increase in the area of ​​the millimeter-wave dielectric substrate and the increase in the overall price of the radar, which cannot meet the increasingly competitive automotive millimeter-wave requirements. Price Demand in the Radar Market

Moreover, the above-mentioned microstrip comb array antenna needs to use a metal waveguide, a metal waveguide flange, or other metal structural parts containing a waveguide cavity to connect the above-mentioned MMIC dielectric substrate, resulting in the in-vehicle millimeter-wave radar The overall weight increases, which cannot meet the needs of lightweight vehicles

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