SCART Connector Shielding for Low Impedance Grounding
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Solution Overview
Problem
SCART connectors often fail to provide an effective low impedance high frequency path from the shield of the cable connector to the metal chassis, leading to electromagnetic interference (EMI) issues as high frequency radiation exceeds regulatory limits due to improper grounding of cable shields.
Innovation Solution
A metallic shield with channels and side walls is attached to the SCART connector and chassis, creating a wide electrical connection that reduces impedance by contacting the shield of the SCART connector and the conductive chassis at multiple points, ensuring a low inductance path for high frequency signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielded cable connector is used with SCART, then electromagnetic shielding is provided, but high frequency electromagnetic radiation escapes due to improper grounding of the cable shield
Solution Approach 1:
A metallic shield is introduced as an intermediary component between the cable shield and the product chassis. This intermediate shield provides a dedicated low-impedance grounding path that the original SCART connector design lacked, effectively mediating the connection between the cable shielding system and the chassis grounding system.
Solution Approach 2:
The patent changes the electrical parameter (impedance) of the grounding path by introducing a metallic shield with specific geometric characteristics. The shield's dimensions, material properties, and mounting configuration are optimized to achieve low impedance at high frequencies, fundamentally altering the electrical characteristics of the grounding path.
2Ease of manufacture
If the SCART connector is designed without integrated shielding, then manufacturing is simpler, but electromagnetic interference exceeds regulatory limits
Solution Approach 1:
The shielding function is segmented from the SCART connector itself and implemented as a separate metallic shield component. This segmentation allows the connector to maintain its simple, easy-to-manufacture design while the added shield component provides the necessary electromagnetic interference protection, separating the concerns of mechanical connection and electromagnetic shielding.
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 configuration effectively reduces impedance and prevents electromagnetic interference by establishing a conductive path that adheres to EMC regulations, ensuring reliable signal transmission and compliance with standards like FCC and CE.
Implementation Method 1
A metallic shield with channels and side walls is attached to the SCART connector and chassis, creating a wide electrical connection that reduces impedance by contacting the shield of the SCART connector and the conductive chassis at multiple points, ensuring a low inductance path for high frequency signals.
Implementation Method 2
A metallic shield with channels and side walls is attached to the SCART connector and chassis, creating a wide electrical connection that reduces impedance by contacting the shield of the SCART connector and the conductive chassis at multiple points, ensuring a low inductance path for high frequency signals.
Data Source
AI summary
A shield for reducing impedance of a shielding of a SCART connector at high frequencies, the shield including a metallic sheet having a first end and a second end where each of the first and second ends extends along and adjacent to a surface of a SCART connector socket. A shielding assembly and a method for shielding a SCART connector are also disclosed.