Shielded Radio Module Antenna Isolation
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Solution Overview
Problem
Radio modules in electronic devices are often affected by nearby components, requiring re-tuning and re-certification when changes occur or when used in different devices, due to electromagnetic loading issues, which complicates wireless communication systems.
Innovation Solution
The implementation of a shielded radio module with an antenna housing made of conductively-coated plastic foam or solid metal, which isolates the antenna from external components, maintaining consistent performance across various devices without the need for re-tuning or re-certification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is placed near other components to save space, then device integration is improved, but the antenna performance deteriorates due to electromagnetic loading from nearby components
Solution Approach 1:
The patent divides the device into separate functional zones by introducing an electromagnetic shield that partitions the antenna region from other components. This segmentation isolates the antenna's electromagnetic field from interfering components, allowing close integration while maintaining performance.
Solution Approach 2:
The electromagnetic shield acts as an intermediary barrier between the antenna and other components. This intermediate structure blocks electromagnetic coupling while occupying minimal space, enabling the antenna to maintain its performance characteristics even when positioned near other device components.
2Reliability
If the antenna is re-tuned to accommodate changes in nearby components, then antenna output is improved, but the complexity of the system increases due to re-tuning and re-certification requirements
Solution Approach 1:
The electromagnetic shield is installed in advance to prevent electromagnetic loading before it can affect antenna performance. This preliminary protective measure eliminates the need for subsequent re-tuning operations and associated certification processes when components are modified or replaced.
Solution Approach 2:
The shielded antenna system is designed to be self-sufficient and self-protecting. The electromagnetic shield automatically maintains the antenna's operating characteristics without requiring external intervention, tuning adjustments, or recertification when other components in the device are changed.
3Reliability
If the antenna is shielded from external components, then antenna loading is reduced, but the device complexity increases due to additional shielding structures
Solution Approach 1:
The patent employs thin electromagnetic shield structures that provide effective shielding while occupying minimal volume. These thin-film or shell-like shields reduce the antenna's exposure to electromagnetic loading from external components without significantly increasing the overall device complexity or size.
Solution Approach 2:
The electromagnetic shields are constructed using composite materials that provide effective electromagnetic shielding properties while maintaining structural integrity and minimizing weight and volume. These composite structures achieve high shielding effectiveness with minimal material usage, reducing the impact on device complexity.
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 ensures that the radio module operates effectively and maintains signal strength regardless of changes in device components or configurations, allowing for seamless use across multiple electronic devices without the need for re-tuning or re-certification, enhancing flexibility and reducing certification burdens.
Implementation Method 1
The antenna of the radio module is shielded from components of the electronic device disposed external to the radio module
Data Source
AI summary
A wireless communication system comprising a radio module. The radio module comprises a radio transceiver and an antenna electrically coupled to the radio transceiver. The radio module may also comprise an electromagnetic shield disposed relative to the antenna to enable the antenna to transmit a radio signal to a location external to the electrical device without electromagnetic interference from within the electrical device.