Connector EMI Dampening via Ferrite Polymer Composites
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Solution Overview
Problem
Current plastic materials used in electrical connectors fail to effectively mitigate electromagnetic interference (EMI), leading to increased mutual coupling or cross-talk between communication links, and existing solutions require redesigning the connector to improve EMI performance.
Innovation Solution
The electrical connector incorporates materials with enhanced dielectric properties, such as ferrite mixtures and conductive plastics, to dampen electrical field strength, and can be retrofitted by replacing existing components without altering the initial design, utilizing ferrite powder blended with polymers, higher permittivity and permeability materials, and Barium Strontium Titanate ceramics to increase dielectric losses and provide shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional plastic materials are used in connector housings, then manufacturing cost and ease of manufacture are maintained, but electromagnetic interference performance deteriorates due to inability to dampen electrical field strength
Solution Approach 1:
The patent applies composite materials by blending ferrite powder with polymer materials to create housing components that combine the ease of plastic manufacturing with electromagnetic shielding properties. The ferrite powder (2-20 wt%) provides EMI dampening while the polymer matrix maintains manufacturability through conventional injection molding processes.
Solution Approach 2:
The patent changes the dielectric properties of connector components by modifying material composition - specifically increasing dielectric constant and loss tangent through ferrite additive incorporation. This transforms ordinary plastic materials into EMI-dampening materials without fundamentally changing the manufacturing process.
2Object-affected harmful factors
If EMI shields are added to improve electromagnetic interference performance, then EMI performance is improved, but device complexity and design requirements increase
Solution Approach 1:
The patent merges the EMI shielding function with existing connector components (housing, housing insert, wire fixture, sealing member) by incorporating ferrite powder directly into their material composition. This eliminates the need for separate EMI shield components and reduces overall device complexity.
Solution Approach 2:
The patent makes existing connector components multi-functional by giving them both their original mechanical functions and new EMI dampening capabilities through ferrite material incorporation. The housing simultaneously provides structural support and electromagnetic shielding, for example.
3Adaptability or versatility
If existing connector designs are retrofitted with improved EMI performance, then adaptability is improved, but manufacturing precision and material consistency become more challenging
Solution Approach 1:
The patent controls material composition consistency by specifying precise ferrite powder content ranges (2-20 wt%) and maintaining consistent particle size distributions. This ensures reproducible EMI dampening properties across different production batches and retrofitted components.
Solution Approach 2:
The patent uses composite materials with ferrite powder dispersed in polymer matrices, where the polymer continuous phase ensures uniform distribution and consistent EMI properties. The composite structure allows existing manufacturing processes to maintain precision while achieving new EMI performance levels.
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 significantly reduces EMI by enhancing dielectric properties and shielding capabilities, allowing for improved electromagnetic compatibility without redesigning existing connectors, applicable to various types of connectors and products requiring EMC.
Implementation Method 1
at least one of the components of the electrical connector comprises a material with properties for dampening an electrical field strength created by the at least one electrical wire
Implementation Method 2
The EMI may be reduced by increasing the dielectric constant and loss tangent of at least one of the components of the electric connector
Implementation Method 3
the housing and/or the housing insert are composed of a conductive plastic or conductive plastic compound
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to an electrical connector comprising a housing for receiving and fixing a housing insert, the housing insert with a wire fixture disposed inside the housing insert, a sealing member disposed at an end of the housing relative to a plug direction, at least one electrical wire received and positioned by the wire fixture and extending through the sealing member, wherein at least one of the components of the electrical connector comprises a material with properties for dampening an electrical field strength created by the at least one electrical wire.