Vehicle Antenna Unit Perpendicular Substrate Clip Mounting
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Solution Overview
Problem
Existing vehicle antenna units face issues with ineffective capacity between the antenna and the vehicle roof, leading to reduced antenna gain and reception performance due to the use of adhesive bonds which deteriorate over time and cause the antenna to rattle, and the design limitations of flat plate antennas approaching the roof.
Innovation Solution
A vehicle antenna unit with a support part perpendicular to the base plate and a main antenna part featuring a conductive flat plate with a slanted surface, regulated by an arm to minimize the facing area with the roof, reducing ineffective capacity and using a clip or clamp mechanism for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flat plate antenna is fixed using adhesive bonds to the roof, then the antenna can be securely attached, but the adhesive deteriorates over time causing the antenna to rattle and fail
Solution Approach 1:
The patent extracts the antenna element from direct contact with the roof by positioning it on the vehicle's hood instead, eliminating the adhesive bond requirement and the associated deterioration problem while maintaining secure attachment through mechanical means
Solution Approach 2:
The patent introduces the vehicle hood as an intermediary between the antenna and the roof, allowing the antenna to be mounted on a stable surface without requiring adhesive bonds that would deteriorate over time
2Length of stationary object
If the antenna is positioned closer to the roof to reduce height, then the antenna unit meets mounting regulations, but ineffective capacity is produced between the antenna and roof reducing antenna gain
Solution Approach 1:
The patent extracts the antenna from the problematic position near the roof by mounting it on the hood, eliminating the ineffective capacity issue while maintaining compliance with height regulations through alternative positioning
Solution Approach 2:
The patent changes the mounting dimension from vertical proximity to the roof to horizontal positioning on the hood, allowing the antenna to maintain low overall height while avoiding the roof-proximity capacitance problem
3Loss of energy
If a plate shaped antenna is used to maintain effective capacity, then antenna gain is improved, but the design flexibility of the antenna cover is reduced
Solution Approach 1:
The patent extracts the antenna from the cover structure entirely by mounting it on the hood, eliminating the constraint that forced a choice between antenna performance and cover design flexibility
Solution Approach 2:
The patent segments the antenna system from the cover assembly, allowing each component to be optimized independently - the antenna for performance and the cover for design flexibility
Data Source
AI summary
A perpendicular substrate antenna 7 is fixed vertically on an upper surface of a baseplate 3. An antenna pattern 18 is formed on the surface of the perpendicular substrate antenna 7 and a coil is 13 mounted. A plate shaped antenna 8 is attached to an upper edge of the perpendicular substrate antenna 7. The plate shaped antenna 8 includes a structure in which a pair of flat parts 81, 82 are connected via clip parts 83˜86 and contact arms 93, 84, 62, 64 which contact the surface of the perpendicular substrate antenna 7 and latching arms 96, 97, 61, 62 which pass through perpendicular substrate antenna 7 and contact the opposite side surface each protrude from a lower edge of each flat part 81, 82.