Isolation Magnetic Device for High Speed Communications
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Solution Overview
Problem
Conventional isolating magnetic devices are unable to handle high magnetizing forces and DC current bias at higher signal speeds, particularly in RJ45 connector assemblies, due to limitations in frequency response and backward compatibility.
Innovation Solution
A method and device for producing an isolation magnetic device using a core with specific hole configurations and wire windings, where wires are wound around the core in a particular pattern to enhance frequency response and compatibility, including the use of a racetrack-shaped core with permeability between 1500 and 5000 and coated with Parylene C, and a common mode choke is added to reduce parasitic capacitive coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional isolating magnetic devices are used, then backward compatibility with slower communications is maintained, but they cannot handle high magnetizing forces and DC current bias at higher signal speeds
Solution Approach 1:
The patent changes the physical and geometric parameters of the magnetic core, specifically using a racetrack-shaped core with specific hole spacing and dimensions, and selecting core material with permeability between 1500 and 5000. These parameter changes enable the device to handle high magnetizing forces and DC current bias at gigabit speeds while maintaining compatibility with conventional RJ45 formats
Solution Approach 2:
The patent employs composite construction by coating the magnetic core with Parylene C, creating a composite structure that combines the magnetic properties of the core material with the protective and insulating properties of the Parylene C coating. This composite approach improves frequency response and enables handling of high-speed signals while maintaining reliability
2Speed
If prior art isolation magnetic devices are designed for high speed communications, then frequency response is improved, but they are not backward compatible and frequently not in conventional RJ45 type connector format
Solution Approach 1:
The patent designs the isolation magnetic device to serve multiple functions and be compatible with multiple standards. The racetrack-shaped core with specific geometric parameters and the wire winding pattern enable the device to function effectively at gigabit speeds while maintaining physical and electrical compatibility with conventional RJ45 connector formats, thus achieving universal applicability across different communication standards
3Ease of manufacture
If wires are wound around a toroid shaped core with circular cross-section, then manufacturing is simplified, but frequency response characteristic is insufficient for high speed communications
Solution Approach 1:
The patent transitions from a symmetric circular cross-section core to an asymmetric racetrack-shaped core with rectangular cross-section. This asymmetric geometry, featuring specific hole spacing and core dimensions, optimizes the magnetic flux distribution and frequency response characteristics, enabling high-speed communication performance while remaining manufacturable through standard core fabrication processes
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 handles higher signal speeds up to gigabits per second while maintaining compatibility with conventional RJ45 formats, providing improved isolation and reduced parasitic capacitive coupling, thus addressing the limitations of prior art devices.
Implementation Method 1
an isolating magnetic device is used in the female connector portion to handle direct current ('DC') offsets
Implementation Method 2
a racetrack-shaped core with permeability between 1500 and 5000
Implementation Method 3
coated with Parylene C
Implementation Method 4
a common mode choke is added to reduce parasitic capacitive coupling
Data Source
AI summary
An isolation magnetic device produced by inserting a first end of a wire through a first hole of a core, wrapping the first end of the wire around a first side of the core and inserting the first end of the wire through a second hole of the core. The second hole of the core is spaced from the first hole and has a longitudinal axis extending parallel to a longitudinal axis of the first hole. The device is further produced by inserting a second end of the wire through the second hole of the core, wrapping the second end of the wire around the first side of the core and inserting the second end of the wire through the first hole of the core.