V-Shaped Patch Antenna Structure for Wider Millimeter-Wave Radar Beamwidth
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Solution Overview
Problem
Existing antenna structures for millimeter-wave radars have a narrow 3 dB beam width, leading to a small detection angle range in the horizontal direction, while maintaining low sidelobes for reducing false alarms.
Innovation Solution
The antenna structure incorporates a series of patch unit groups connected in a V-shaped configuration to the main feeder, allowing for adjustment of included angles and alternating connections to expand the 3 dB bandwidth and reduce the aperture size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional antenna structure is used, then the device complexity is low, but the antenna cannot be effectively disposed of when damaged or obsolete
Solution Approach 1:
The antenna system is divided into a removable antenna component and a fixed mounting structure. The antenna can be independently detached and replaced without affecting the mounting structure, enabling flexible updates while maintaining a simple overall system architecture.
Solution Approach 2:
The antenna mounting structure incorporates dynamic elements such as snap-fit connections or magnetic attachments that allow the antenna to be easily attached and detached. This dynamic mounting mechanism provides replacement flexibility without requiring complex tools or procedures.
2Reliability
If the antenna is integrated into the housing, then the device complexity is low, but water may enter through the antenna connection hole
Solution Approach 1:
A sealing ring or gasket is introduced as an intermediary element between the antenna and housing. This sealing component prevents water from entering through the antenna connection hole while maintaining a relatively simple overall structure. The sealing ring can be easily replaced or upgraded without modifying the housing.
3Ease of operation
If the antenna connection hole is made larger, then the antenna can be more easily installed, but water resistance is compromised
Solution Approach 1:
A sealing ring is positioned at the antenna connection interface to prevent water ingress. This allows the connection hole to be sufficiently large for easy antenna installation while the sealing ring maintains water resistance by creating a waterproof barrier around the antenna perimeter.
4Adaptability or versatility
If the antenna is made removable for replacement, then adaptability improves, but the sealing reliability may deteriorate
Solution Approach 1:
The sealing ring serves as a replaceable intermediary component that maintains sealing reliability during antenna replacement. When the antenna is removed and reinstalled, the sealing ring ensures continuous water protection. The sealing ring can also be independently replaced if deteriorated, maintaining long-term sealing reliability.
Data Source
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AI summary
An antenna structure, a radar, and a terminal are provided, may be applied to the field of millimeter-wave radars, and can extend a 3 dB bandwidth of the antenna structure. The antenna structure (100) includes: A main feeder (110) and at least one patch unit group (121 to 12N), where the at least one patch unit group (121 to 12N) is connected in series to the main feeder (110) in a length direction of the main feeder (110), and each of the at least one patch unit group (121 to 12N) includes at least two patch units (131 and 132) disposed in a V-shaped structure. Each patch unit group (121 to 12N) is connected in series to the main feeder (110) through the two patch units (131 and 132) that are disposed in the V-shaped structure and that are in each patch unit group.