Improved horn antenna and vehicle-mounted millimeter wave radar

By improving the design of the horn antenna and using a power divider to separate the electromagnetic field, the azimuth beamwidth is widened, solving the problems of complex and high cost in the existing horn array manufacturing process. This results in a smaller radiation aperture and lower manufacturing cost, making it suitable for vehicle-mounted millimeter-wave radar.

CN223451193UActive Publication Date: 2025-10-17FOSS (HANGZHOU) INTELLIGENT TECH CO LTD
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Patent Information

Application Number
CN202422597083.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-25
Publication Date
2025-10-17
Estimated Expiration
2034-10-25

AI Technical Summary

Technical Problem

Existing 4D millimeter-wave radar antennas require a wider azimuth beamwidth, but the horn array processing is complex and costly, and the waveguide slot solution has a narrow bandwidth, which makes it difficult to meet the needs of automotive millimeter-wave radar.

Method used

An improved horn antenna design is adopted, which uses a power divider to separate the electromagnetic field in the horn cavity. The power divider function of one to two is realized through copper pillars, which widens the azimuth beamwidth. Single-layer or double-layer board processing is used to reduce costs.

Benefits of technology

It achieves a wider azimuth beamwidth and a smaller radiation aperture, reducing manufacturing costs, making it suitable for vehicle-mounted millimeter-wave radar, and possessing excellent radar pattern characteristics.

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Abstract

The utility model relates to an improved horn antenna and a vehicle-mounted millimeter wave radar, the improved horn antenna comprises a side wall, the side wall surrounds and defines an inner cavity, and one end of the side wall has a flaring trend; the inner cavity is internally provided with a power division component, the cross section of the side wall is provided with a long side and a short side which are opposite, the power division component is a rod-shaped conductor extending along the direction of the short side, and the power division component is positioned in the middle of the inner cavity in the direction of the long side. Compared with an antenna array, the horn antenna provided by the utility model realizes separation of an internal electromagnetic field by using the power division component, effectively widens the beam width of an azimuth plane, and is simpler in overall structure and smaller in size.
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