One-Piece Vehicle Antenna Module with Metallic Shielding
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Solution Overview
Problem
Existing antenna modules for vehicles require multiple circuit boards, high-frequency connectors, and complex assembly, leading to high costs and inadequate shielding, as well as the inability to compensate for roof curvature.
Innovation Solution
A one-piece antenna module with a detachable outer cover and a closed, metallic antenna box that provides electromagnetic shielding, using compressible metalized foam for curvature compensation and integrating electronic circuits within the box, with external antennas electrically coupled through bushings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a closed, metallic antenna box with feedthroughs is used, then electromagnetic shielding between external and internal antenna parts is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent combines the antenna box, electronic circuits, and feedthroughs into a single integrated assembly. The metallic antenna box serves both as a structural housing and as an electromagnetic shield, while the feedthroughs are directly integrated into the box structure to provide both mechanical support and electrical connectivity, eliminating the need for separate shielding components and connector assemblies.
Solution Approach 2:
The metallic antenna box performs multiple functions simultaneously: it provides structural support for the electronic circuits, acts as an electromagnetic shield to prevent interference, and serves as a mounting structure for the feedthroughs. This multi-functionality reduces the overall number of components needed while maintaining effective shielding.
2Adaptability or versatility
If compressible metalized foam is used for coupling elements, then roof curvature compensation is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs compressible metalized foam as coupling elements that can change their physical parameters (compression, expansion) to adapt to roof curvature variations. The foam's compressibility allows it to deform and conform to different roof surfaces, providing a universal solution that accommodates various curvature radii without requiring precision manufacturing for each specific application.
Solution Approach 2:
The use of metalized foam combines the benefits of foam material (compressibility, flexibility) with metal coating (electrical conductivity, structural integrity). This composite material approach enables the coupling elements to provide both mechanical adaptation to roof curvature and electrical connectivity for antenna feedthroughs, reducing precision requirements compared to solid metal components.
3Object-affected harmful factors
If external antennas are electrically coupled through bushings in the metallic top, then shielding is maintained, but connection complexity increases
Solution Approach 1:
The patent extracts the electrical connection function from separate connectors and integrates it directly into the feedthroughs that pass through the metallic antenna box. The feedthroughs are pre-installed in the metallic top during box fabrication, creating built-in connection points that eliminate the need for additional connectors, mounting brackets, and assembly steps while maintaining shielding integrity.
Solution Approach 2:
The feedthroughs are pre-installed in the metallic top of the antenna box during the box fabrication process, before the box is assembled with the electronic circuits and external antennas. This preliminary action ensures that the shielding structure is already in place and that the electrical connections are pre-positioned, simplifying subsequent assembly and reducing the complexity of final installation.
4Ease of manufacture
If a one-piece antenna module is used, then assembly cost is reduced, but adaptability to different roof configurations decreases
Solution Approach 1:
The patent segments the antenna module into two main parts: a fixed metallic antenna box containing the electronic circuits and feedthroughs, and a detachable outer cover that houses the external antenna elements. This segmentation allows the box to be pre-manufactured as a standard unit for cost efficiency, while the detachable cover can be configured or replaced to adapt to different roof shapes and opening sizes, maintaining both manufacturing economy and configurability.
Solution Approach 2:
The detachable outer cover design introduces dynamic adaptability to the otherwise fixed antenna box structure. The cover can be removed, adjusted, or replaced depending on the specific roof configuration, allowing the same standardized antenna box to be adapted to various vehicle models and roof types without requiring custom manufacturing for each application.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables cost-effective, compact installation with complete shielding between external and internal antenna parts, ensuring interference-free operation and mechanical stability while accommodating roof curvature.
Implementation Method 1
They are made of compressible metalized foam material to compensate for roof curvature
Implementation Method 2
The antenna box is closed on all sides and can be attached below the vehicle roof with a metal top. The metallic, closed top of the antenna box has feedthroughs for the external antenna elements
Data Source
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AI summary
A one-piece antenna module, has at least one outside receiving and/or transmitting antenna element under an outer cover. The one-piece antenna module has an antenna box, which has no or few inside internal antennas and which surrounds the electronic circuits that interact with the antenna elements. The outer cover is detachably fastened to the antenna box and can be attached so as to protrude from an opening in the vehicle roof. The antenna box is closed on all sides and can be attached below the vehicle roof by a metal top side. The metal closed top side has feed-throughs for the outside antenna elements. The outside antenna elements in the outer cover are electrically coupled to the circuits inside the antenna box closed on all sides by the feed-throughs. Thus, a compact installation part is obtained, which provides complete shielding between an antenna part and a transceiver part.