High Frequency Connector EMI Shielding via Insert-Molded Absorbers
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Solution Overview
Problem
Existing electrical connectors with EMI/RFI shielding require expensive high-magnet conductive materials and complex manufacturing processes, making them economically impractical.
Innovation Solution
An electrical connector design featuring an insulative housing with integral EMI absorbers attached to grounding contacts via insert-molding, reducing material costs while maintaining effective shielding through the use of EMI absorbers integrated within the insulators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If high-magnet conductive wave absorbing material is used for EMI shielding, then EMI/RFI shielding performance is improved, but material cost increases
Solution Approach 1:
The EMI shielding function is segmented from the housing material and assigned to separate EMI absorber components that are attached only to specific grounding contacts. This eliminates the need to use expensive high-magnet conductive material throughout the entire housing, reducing material cost while maintaining effective EMI/RFI shielding at critical points.
Solution Approach 2:
Instead of providing uniform EMI shielding across the entire connector housing, the invention applies EMI absorbers locally only to grounding contacts that require shielding. This localized approach reduces the quantity of expensive EMI absorbing material needed while maintaining adequate shielding performance where it is most needed.
2Object-affected harmful factors
If high-magnet conductive wave absorbing material is used for EMI shielding, then EMI/RFI shielding performance is improved, but manufacturing complexity increases
Solution Approach 1:
The EMI shielding function is divided into separate modular EMI absorber components that can be independently manufactured and then attached to grounding contacts. This segmentation simplifies the manufacturing process compared to molding the entire housing from expensive conductive material, as each component can be produced using standard processes and assembled together.
Solution Approach 2:
The invention uses composite construction where standard insulative housing material is combined with separate EMI absorber components attached to specific contacts. This composite approach allows the use of conventional, easier-to-manufacture materials for the housing while adding EMI shielding functionality through simpler attachment processes rather than complex conductive material molding.
3Object-generated harmful factors
If EMI absorbers are attached to grounding contacts, then resonance and radiation are reduced, but device complexity increases
Solution Approach 1:
The EMI absorbers are integrated with grounding contacts through attachment, merging the EMI absorption function with the existing grounding contact structure. This combination reduces resonance and radiation without requiring completely separate complex systems, as the EMI absorbers work in conjunction with the already-present grounding contacts.
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 lowers resonance and radiation during high-frequency transmission, providing economical EMI/RFI shielding without the need for expensive materials, simplifying the manufacturing process while maintaining superior electrical performance.
Implementation Method 1
Each grounding contact is equipped with the corresponding EMI absorber before being insert-molded within the insulator so as to have the corresponding EMI absorber also integrally formed with the insulator. Each contact includes a front resilient contacting section and a rear soldering section with a horizontal connecting section therebetween wherein the corresponding EMI absorber is attached upon the connecting section for lowering the resonance and the radiation of the corresponding grounding contact.
Data Source
AI summary
An electrical connector includes an elongate insulative housing defining a central slot extending along a longitudinal direction, and two rows of contacts disposed by two sides of the central slot. The housing forms a front receiving cavity to receive the corresponding mating tongue of the complementary connector, and a rear receiving cavity to receive the corresponding insulators wherein each insulator is integrally formed with each row of contacts via insert-molding for completing the whole contact module. Each grounding contact is equipped with the corresponding EMI absorber before being insert-molded within the insulator so as to have the corresponding EMI absorber also integrally formed with the insulator.