Network Magnetic Assemblies EMI Suppression via Transformer Gaps
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Solution Overview
Problem
Conventional network communication devices suffer from electromagnetic interference (EMI) due to the close and uncontrolled interconnection lengths of ring-shaped transformers and filters, which restricts layout flexibility and miniaturization on circuit boards.
Innovation Solution
The network communication device features a circuit board with network magnetic assemblies comprising Ethernet transformers and inductors, where each transformer is connected in series with an inductor via a conductive trace, with specific gaps between adjacent transformers to reduce EMI and optimize space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If ring-shaped transformers and filters are commonly disposed in the accommodation space of the casing with jump interconnection wires, then the network magnetic module can be compactly integrated, but the interconnection lengths and distances between components cannot be controlled and maintained in constant lengths, causing electromagnetic interference
Solution Approach 1:
The patent divides the network magnetic module into multiple independent signal transmission channels, each with separately disposed ring-shaped transformers and filters. This segmentation allows each channel to be independently optimized for EMI control while maintaining compact overall module size through systematic arrangement.
Solution Approach 2:
The patent implements different arrangement strategies for different signal transmission channels within the same module. Each channel's components are positioned with controlled interconnection lengths and distances tailored to its specific signal characteristics, achieving local optimization of EMI suppression while maintaining overall compactness.
2Device complexity
If the network magnetic module occupies more complete regions and spaces of the circuit board, then the integration of signal transmission channels is achieved, but the layout and arrangements of circuits, traces and electronic elements are restricted
Solution Approach 1:
By segmenting the network magnetic module into independent signal transmission channels with standardized interfaces, the patent enables flexible layout arrangements on the circuit board. Each channel can be independently positioned and connected, providing adaptability while maintaining integrated functionality.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement within the casing to achieve integration without occupying excessive two-dimensional circuit board space. Components are stacked and positioned in multiple layers and directions, transforming the problem from a 2D layout constraint to a 3D spatial optimization solution.
3Device complexity
If the network magnetic module occupies more complete regions and spaces of the circuit board, then the signal transmission channels are integrated, but the miniaturizations of the products do not come easy
Solution Approach 1:
The patent employs nested arrangement where smaller components are positioned within or between larger components. Ring-shaped transformers and filters are arranged in overlapping and stacked configurations, maximizing space utilization and reducing the overall volume of the network magnetic module while maintaining integrated signal transmission channels.
Solution Approach 2:
The patent transitions from two-dimensional planar arrangement to three-dimensional spatial configuration. Components are positioned in multiple layers with vertical stacking and diagonal arrangements, achieving high integration density without increasing the product's footprint or volume, thus enabling miniaturization.
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 suppresses EMI, enhances layout flexibility, and facilitates miniaturization by allowing more efficient use of circuit board space.
Implementation Method 1
The network magnetic assemblies are disposed on the circuit board and electrically connected with the network connector and the network chip, respectively. Each of the network magnetic assemblies includes an Ethernet transformer and at least one inductor, and the Ethernet transformer is electrically connected in series with the inductor via a conductive trace of the circuit board, wherein any two adjacent Ethernet transformers are separately arranged with a gap having a second specific length.
Data Source
AI summary
A network communication device is disclosed. The network communication device includes a circuit board, a network connector, a network chip and a plurality of network magnetic assemblies. The network connector, the network chip and the network magnetic assemblies are disposed on the circuit board. The network magnetic assemblies are electrically connected with the network connector and the network chip, respectively. Each of the network magnetic assemblies includes an Ethernet transformer and at least one inductor. The Ethernet transformer is electrically connected in series with the inductor via a conductive trace of the circuit board. Any two adjacent Ethernet transformers are separately arranged with a gap having a second specific length.