Antenna component, vehicle-borne radar and automobile

Abstract

The invention discloses an antenna component, a vehicle-borne radar and an automobile. The antenna component comprises a medium substrate, a coplanar waveguide component, an array antenna and a back ground connection plate formed on the other side of the medium substrate, wherein the coplanar waveguide component is formed on one side of the medium substrate; the array antenna is formed on one sideof the medium substrate, is connected with the coplanar waveguide component and comprises at least one micro-strip feeder line and a plurality of array patches arranged on the top of the micro-stripfeeder line, wherein the plurality of array patches are divided into two groups, and the two groups of array patches have different widths; and the back ground connection plate is formed on the otherside of the medium substrate and is covered just below the coplanar waveguide component and the array antenna. The coplanar waveguide component and the array antenna of the antenna component are arranged on the same side of the medium substrate so as to be easy in connecting with the tiny pins of an MMIC (Monolithic Microwave Integrated Circuit) and to be easy in being arranged on the same side ofthe medium substrate with the MMIC, so that the antenna component is favorable for reducing the use area of the medium substrate and lowering the integral price of the vehicle-borne radar, in addition, a metal structural member which contains a waveguide cavity does not need to be used, and the integral quality of the radar can be lowered.

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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