Plug Connector Bracket Filter Circuit for Shielding EMI
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Solution Overview
Problem
Existing plug connectors fail to effectively filter out interference induced by the cable shielding layer, leading to additional electromagnetic interference, and adding separate filter circuits can cause over-protection and hinder ground design.
Innovation Solution
A bracket with a filter circuit, comprising resistors and capacitors, is integrated into the plug connector to filter out induced currents in the cable shielding layer, using a printed circuit board or mechatronic device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate electromagnetic interference filter circuit is provided on the electronic device, then interference filtering capability is improved, but device complexity increases and ground design is hindered
Solution Approach 1:
The patent combines the filter circuit functionality with the bracket structure by printing the circuit directly on the bracket surface. This merging of the filter device into the bracket eliminates the need for separate filter circuits while maintaining interference filtering capability, thus reducing device complexity without compromising the harmful factor protection.
Solution Approach 2:
The bracket is designed to serve multiple functions: it provides structural support, grounds the shielding layer, and simultaneously acts as a filter circuit through the printed circuit. This multi-functionality eliminates the need for additional dedicated filter components, simplifying the overall device structure while maintaining effective interference filtering.
2Object-affected harmful factors
If additional circuit equipment is added to the cable system, then interference filtering is improved, but ease of manufacture deteriorates due to strict procedures and high visibility requirements
Solution Approach 1:
The filter circuit is integrated into the bracket structure itself, combining what would traditionally be separate components (bracket and filter circuit) into a single manufacturable unit. This eliminates the need for additional assembly steps and strict installation procedures, significantly improving ease of manufacture while maintaining interference filtering capability.
Solution Approach 2:
The bracket serves itself by incorporating the filter circuit functionality directly into its structure. Instead of requiring separate filter components to be added and configured, the bracket inherently provides both structural and filtering functions, simplifying the manufacturing process and reducing installation complexity.
3Reliability
If both ends of the cable shielding layer are grounded, then protection against external electromagnetic fields is improved, but object-generated harmful factors worsen due to induced currents in the shielding layer
Solution Approach 1:
The filter circuit printed on the bracket acts as an intermediary between the shielding layer and ground. Instead of directly grounding both ends of the shielding layer (which creates induced current loops), the filter circuit provides a controlled path that allows grounding while filtering out the induced currents, thus eliminating the harmful effect while maintaining the protective function.
Solution Approach 2:
The filter circuit converts the harmful induced currents into a beneficial filtering function. By incorporating the filter circuit into the grounding path, the system uses the induced currents as input to the filter, which then outputs a cleaned signal to ground, transforming the harmful effect into a useful interference filtering mechanism.
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 bracket effectively filters out interference signals, simplifies design by eliminating the need for additional filter devices, and enhances system robustness by reducing electromagnetic interference.
Implementation Method 1
a current will be induced in the cable shielding layer, thus giving rise to additional interference
Implementation Method 2
the filter circuit comprising at least one resistor and capacitor connected in parallel, the filter circuit having a first end and a second end, the first end being electrically connected to the shielding layer of the cable
Data Source
Figure 1A
Figure 1B~1C
Figure 2~3
AI summary
The present application discloses a bracket (1), a plug connector comprising the bracket (1), and a method for forming a bracket (1). A bracket (1) disposed in a plug connector is provided, the plug connector being used to connect a cable (2) between electronic devices, the cable (2) comprising a wire core (21) for transmitting signals and a shielding layer (22) surrounding the wire core (21), the shielding layer (22) of the cable (2) being fitted to the bracket (1), wherein a circuit is printed on the bracket (1); and the circuit comprises a filter circuit (10), the filter circuit (10) comprising at least one resistor (101a, 101b) and capacitor (102) connected in parallel, the filter circuit (10) having a first end (10A) and a second end (10B), the first end (10A) being electrically connected to the shielding layer (22) of the cable (2) and acting as a node where the at least one resistor (101a, 101b) and capacitor (102) are connected in parallel, and the second end (10B) of the filter circuit (10) being grounded and acting as another node where the at least one resistor (101a, 101b) and capacitor (102) are connected in parallel.