RF Absorber in Shielding Cage Channel for EMI Reduction
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Solution Overview
Problem
Conventional electrical connector assemblies fail to adequately reduce electromagnetic interference (EMI) emissions due to increasing signal speeds, necessitating an improved EMI shielding solution.
Innovation Solution
Incorporating a shielding cage member with a separator having a channel that houses a light pipe organizer and an RF absorber, which reduces EMI emissions by absorbing electromagnetic interference within the channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal cage shielding is used, then EMI shielding is provided, but EMI shielding becomes inadequate due to increasing signal speeds
Solution Approach 1:
The patent combines conventional metal cage shielding with RF absorber materials to create a composite EMI shielding system. The RF absorber is positioned within the cage structure to work synergistically with the metal shielding, providing both reflection and absorption mechanisms to effectively reduce EMI emissions despite increasing signal speeds.
Solution Approach 2:
The RF absorber is strategically positioned at specific locations within the cage structure where EMI emissions are most problematic. This localized approach enhances shielding effectiveness at critical areas without requiring complete redesign of the entire cage structure, thereby improving EMI protection while maintaining structural integrity.
2Object-affected harmful factors
If RF absorber is added to the channel, then EMI emissions are reduced, but device complexity increases
Solution Approach 1:
The RF absorber is integrated into the existing cage structure in a way that allows it to serve multiple functions: EMI absorption, structural support for light pipes, and organization of internal components. This multi-functionality approach reduces the need for separate components and minimizes overall device complexity while achieving effective EMI reduction.
Solution Approach 2:
The RF absorber is nested within the existing cage structure, utilizing the available internal space efficiently. By placing the RF absorber within the channel formed by the cage walls and separator, the design avoids adding external components and maintains a compact overall structure, thereby limiting the increase in 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 effectively minimizes EMI emissions by increasing impedance and absorbing energy within the channel, thereby enhancing the EMI shielding capabilities of the electrical connector assembly.
Implementation Method 1
An RF absorber is positioned within the channel. The RF absorber reduces an amount of electromagnetic interference (EMI) emitted from the channel.
Data Source
AI summary
An electrical connector assembly is provided with a shielding cage member having an upper port and a lower port configured to receive pluggable modules therein. The cage member has side walls that extend along sides of the upper and lower ports. The cage member includes a separator member that extends between the side walls and between the upper and lower ports. The separator member has an upper plate and a lower plate with a channel therebetween. A light pipe organizer is positioned within the channel. An RF absorber is positioned within the channel in engagement with the light pipe organizer. The RF absorber reduces an amount of electromagnetic interference (EMI) emitted from the channel.