Cap Assembly Electromagnetic Shield for Handheld Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In handheld devices, the close proximity of electronic components leads to electromagnetic interference issues, particularly when different WAN antennas and scanner modules are incompatible, resulting in detuning and increased costs for retuning the WAN antenna.
Innovation Solution
A cap assembly with an electromagnetic shield made of conductive material electrically connected to grounding means, which is positioned between the WAN antennas and scanners, creating a matched impedance environment that maintains a constant electromagnetic environment for the WAN antennas regardless of the scanner configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different scanner modules are used in handheld devices, then device functionality and adaptability are improved, but electromagnetic interference and antenna detuning occur
Solution Approach 1:
An electromagnetic shield is introduced as an intermediary component between the scanner module and the WAN antenna. This shield blocks electromagnetic fields generated by the scanner, preventing them from interfering with the antenna's operation. The shield is made of conductive material and can be electrically connected to grounding means to effectively dissipate electromagnetic energy, thereby maintaining antenna performance across different scanner configurations.
Solution Approach 2:
The internal space of the handheld device is segmented into distinct electromagnetic zones using the shield. The shield creates separate regions for the scanner module and the WAN antenna, allowing each component to operate independently without electromagnetic interference. This spatial segmentation enables the use of different scanner modules without affecting antenna performance.
2Volume of moving object
If scanner modules are placed in close proximity to WAN antennas, then space utilization is improved, but electromagnetic interference increases
Solution Approach 1:
The electromagnetic shield serves as a mediator that enables close proximity placement of the scanner module and WAN antenna without electromagnetic interference. By blocking electromagnetic fields, the shield allows these components to be positioned near each other to maximize space utilization while maintaining signal integrity.
Solution Approach 2:
The shield provides localized electromagnetic protection specifically in the region between the scanner module and the WAN antenna. This local quality approach allows the scanner and antenna to be placed close together in specific areas while maintaining overall device compactness, with the shield creating an electromagnetic barrier only where needed.
3Adaptability or versatility
If WAN antennas are retuned for different scanner configurations, then antenna compatibility is improved, but manufacturing costs and complexity increase
Solution Approach 1:
The electromagnetic shield acts as a universal intermediary that works with all scanner module types without requiring changes to the WAN antenna design. This eliminates the need for retuning antennas for different scanner configurations, reducing manufacturing complexity and costs while maintaining compatibility across various scanner types.
Solution Approach 2:
The shield provides universal electromagnetic protection that works with multiple scanner module types and configurations. This multi-functional approach allows a single antenna design to be used across different device variants with different scanners, simplifying manufacturing and reducing the need for multiple antenna configurations.
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 configuration provides flexibility and modularity, allowing various scanners and WAN antennas to be used without requiring changes to the WAN antennas, reducing manufacturing costs and maintaining a consistent electromagnetic environment.
Implementation Method 1
an electromagnetic shield (34) receivable in the cavity for providing each WAN antenna (32) with a substantially predetermined electromagnetic environment
Implementation Method 2
The electromagnetic shield at least partially includes conductive material electrically connected to grounding means, for electrically grounding the electromagnetic shield
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
A cap assembly attachable to a main housing of a handheld device. The cap assembly includes a cap body at least partially defining one or more cavities therein, and one or more WAN antennas receivable in the cavity. In addition, the cap assembly includes an electromagnetic shield receivable in the cavity for providing each WAN antenna with a predetermined electromagnetic environment in which the impedances of the WAN antenna and the electromagnetic shield are substantially matched.