RJ45 Plug Connector PCB Isolation for Stable Network Signals
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Solution Overview
Problem
Existing RJ45 chassis sockets suffer from inconsistent network signal quality due to variations in manufacturing and require separate components for high-voltage insulation and signal conditioning, leading to a non-compact design.
Innovation Solution
A flush-type plug connector with integrated chip-LAN transformers and chip chokes on the printed circuit board, utilizing automatic SMT technology, provides galvanic isolation, impedance adjustment, and noise suppression, enabling direct connection to the PHY chip with a compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hand-wound ferrite rings are used for high-voltage insulation, then galvanic isolation is achieved, but manufacturing precision deteriorates due to broad variation in network signal voltage quality
Solution Approach 1:
The patent replaces hand-wound ferrite rings with chip-LAN transformers that are manufactured using automated SMT technology. These chip transformers are standardized components with consistent electrical characteristics, eliminating the manufacturing variations inherent in hand-winding processes while maintaining the required galvanic isolation functionality.
Solution Approach 2:
The patent substitutes the mechanical hand-winding process with automated SMT mounting of chip components. This replacement of manual mechanical assembly with automated electronic component placement ensures uniform manufacturing quality and precise control over electrical characteristics.
2Reliability
If separate components are used for high-voltage insulation and signal conditioning, then functional requirements are met, but device complexity increases
Solution Approach 1:
The patent integrates the chip-LAN transformer and chip choke directly on the PCB in close proximity, combining multiple functions (galvanic isolation, impedance matching, noise suppression) into a compact assembly. This merging of components reduces the overall device complexity while maintaining all required signal conditioning functions.
Solution Approach 2:
The chip-LAN transformer serves multiple functions simultaneously: it provides galvanic isolation, performs impedance matching, and enables signal conditioning. This multi-functionality eliminates the need for separate dedicated components for each function, simplifying the overall device architecture.
3Stability of the object's composition
If hand-wound ferrite rings are embedded in polymer, then vibration elimination is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces the mechanical embedding process of hand-wound ferrite rings in polymer with automated SMT mounting of chip components. The chip transformers and chokes are directly mounted on the PCB using automated pick-and-place machines and reflow soldering, eliminating the need for polymer embedding while maintaining vibration stability through rigid PCB mounting.
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
Ensures uniform network signal quality and compact design by integrating galvanic isolation and signal conditioning components directly on the PCB, allowing direct signal transmission to the ethernet PHY chip without additional high-voltage regions.
Implementation Method 1
at least one chip-LAN transformer mounted on the printed circuit board for each data line
Implementation Method 2
a common mode choke mounted on the printed circuit board is assigned to each chip-LAN transformer
Data Source
AI summary
A plug connector for the mechanical and electrical connection to cable plugs of data cables has a housing (2) having at least one plug-in opening (1) for a complementary plug connector. Multiple electrical contact elements (5) protrude into the plug-in opening (1) and are guided on the rear side of the housing (2) on its outer side and are connected to a printed circuit board (6) fastened on the outside on the housing (2). The printed circuit board (6) carries a circuit and connection elements (7) for further electronic assemblies. This circuit on the printed circuit board (6) includes an assembly for galvanic isolation of the network signals, in which at least one chip-LAN transformer (13) mounted on the printed circuit board (6) is provided for each data line.