Twice-Molded Modular Antenna for Smaller Chassis Windows
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Solution Overview
Problem
Existing information handling systems face challenges in efficiently integrating wireless charging and communication devices due to interference from metal chassis, which limits antenna performance and requires larger antenna windows.
Innovation Solution
The implementation of a twice-molded modular antenna system, where the antenna is insert molded onto an antenna holder and covered with an RF-transparent antenna cover, allowing for closer placement to the chassis edge and reducing interference, while maintaining aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the antenna is placed closer to the metal chassis, then the antenna window size can be reduced, but the metal chassis causes interference that degrades transmission and reception capabilities
Solution Approach 1:
An RF-transparent antenna cover is introduced as an intermediary component between the metal chassis and the antenna. This cover allows RF signals to pass through while physically separating the antenna from the interfering metal surface, enabling the antenna to be positioned closer to the chassis edge without direct metal contact, thus reducing the antenna window size while maintaining transmission and reception capabilities
Solution Approach 2:
The solution moves the antenna positioning problem from a two-dimensional plane (antenna window opening size) to a three-dimensional space by utilizing the depth dimension. The antenna is placed in a recessed cavity within the antenna cover, allowing it to be positioned closer to the chassis edge while the RF-transparent cover material fills the space and maintains signal integrity, effectively using the third dimension to resolve the interference issue
2Reliability
If the antenna is placed closer to the chassis edge, then transmission and reception capabilities are enhanced, but the integration complexity with the chassis increases
Solution Approach 1:
The antenna, antenna holder, and antenna cover are merged into a single integrated assembly through insert molding. The antenna is insert molded onto the antenna holder, which is itself integrated into the antenna cover, creating a pre-assembled modular unit that simplifies integration with the chassis. This merging reduces the number of separate components and assembly steps required, thereby reducing integration complexity while maintaining enhanced transmission and reception capabilities
Solution Approach 2:
The antenna and antenna holder are preliminarily assembled through insert molding before final installation into the chassis. This preliminary assembly creates a pre-configured modular unit with precise positioning and secure attachment already established, reducing the complexity of final integration with the chassis and ensuring optimal transmission and reception capabilities are achieved without requiring complex on-site adjustments
3Ease of manufacture
If a traditional antenna integration method is used, then the manufacturing process is simpler, but the wireless charging efficiency is reduced
Solution Approach 1:
The traditional mechanical assembly process for antenna integration is replaced with an insert molding process. Instead of mechanically assembling separate antenna and holder components, the antenna is directly molded onto the holder in a single injection molding operation. This substitution of manufacturing method maintains ease of manufacture through automated molding while achieving the precise positioning and secure attachment needed for high wireless charging efficiency
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
This approach enhances transmission and reception capabilities, reduces antenna window size, and improves wireless charging efficiency by up to 26.44%, while ensuring seamless integration with the system's design.
Implementation Method 1
covered with an RF-transparent antenna cover, allowing for closer placement to the chassis edge and reducing interference
Implementation Method 2
the antenna is insert molded onto an antenna holder
Data Source
AI summary
An information handling system with a wireless charging system or wireless antenna may include a processor; a memory; a power management unit (PMU), an antenna controller to provide instructions to a radio to cause an antenna to transceive wirelessly with a network, or a wireless charging controller to schedule the wireless charging at a charging coil, where the antenna or charging coil are part of a twice-molded modular antenna including: the antenna a charging coil, an antenna holder onto which the antenna is insert molded, and an antenna cover that is molded onto the antenna or charging coil for interference at an antenna window edge surface of a chassis cover of the information handling system.