Conductive Foam EMR Shield for Transceiver Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic modules emit electromagnetic radiation, causing electromagnetic interference that can impair the operation of nearby devices, and existing solutions fail to effectively control these emissions.
Innovation Solution
The use of a conductive carrier and conductive foam EMR shield that surrounds the electronic module's shell, creating physical and electrical contact to reduce EMR emissions by engaging with the module's structure and the host device's cage, thereby minimizing electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conductive carrier with extended elements is used to create physical and electrical contact with the shell, then electromagnetic radiation shielding effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent employs a flexible conductive foam material that can be compressed to conform to the shell surface, creating effective electrical contact without requiring complex rigid structures. The foam's flexibility allows it to adapt to minor variations in shell geometry, reducing the need for precision machining and complex assembly fixtures.
Solution Approach 2:
The conductive foam utilizes a porous structure where conductive particles are distributed throughout a foam matrix. This porous configuration provides multiple contact points between the shield and shell while maintaining flexibility. The voids in the foam allow compression and expansion during assembly and operation, ensuring consistent electrical contact without adding structural complexity.
2Object-generated harmful factors
If extended elements are biased against the shell to create electrical contact, then electromagnetic interference control is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent changes the physical state of the conductive material from rigid to compressible foam. This allows the material to adapt to variations in shell surface geometry and assembly conditions. The foam can be compressed to achieve adequate contact pressure without requiring precise control of assembly forces or tolerances, as the material's compressibility absorbs variations in manufacturing and assembly parameters.
Solution Approach 2:
The conductive foam performs self-adjustment during assembly, automatically conforming to the shell surface and distributing contact pressure evenly. This self-service capability eliminates the need for complex adjustment mechanisms or precision alignment fixtures, as the foam's inherent properties allow it to self-position and self-adjust to create effective electrical contact.
3Object-affected harmful factors
If conductive foam is used to surround and engage with the shell, then electromagnetic radiation shielding is improved, but ease of manufacture decreases
Solution Approach 1:
The flexible conductive foam can be easily formed into the required shield configuration through compression molding or other forming processes. The material's flexibility allows it to be shaped around complex geometries without requiring multiple assembly steps or precision fitting, as a single piece can be compressed to conform to the shell and engage with the cage structure.
Solution Approach 2:
The patent combines multiple functions into the single conductive foam component: electromagnetic shielding, mechanical engagement with the shell, electrical contact through compression, and structural support. This merging of functions eliminates the need for separate components for each function, reducing assembly complexity and improving ease of manufacture despite the specialized material requirements.
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 EMR shield effectively maintains EMR emissions at acceptable levels, preventing interference in surrounding devices and ensuring proper operation of nearby systems.
Implementation Method 1
a conductive carrier sized and configured to surround a shell of an electronic transceiver module... Each extended element is configured to bias against the shell in order to create a physical and electrical contact between the conductive carrier and the shell
Data Source
AI summary
An electromagnetic radiation shield for an electronic module. In one example embodiment, an EMR shield for an electronic transceiver module includes a conductive carrier sized and configured to surround a shell of an electronic transceiver module. The conductive carrier defines a plurality of extended elements located on at least one edge of the conductive carrier and an orientation element. Each extended element is configured to bias against the shell in order to create a physical and electrical contact between the conductive carrier and the shell. The orientation element is configured to engage a corresponding structure in the shell in order to correctly orient the conductive carrier with respect to the shell.