Modular Jack Connector Offset Circuitry for Capacitance Compensation
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Solution Overview
Problem
Current modular connectors fail to support high-speed Ethernet protocols like 10 to 2000 MHz without signal degradation, primarily due to phase shift and unwanted interaction of electromagnetic signals, which affects error-free transmission.
Innovation Solution
A modular jack connector design with a flexible circuit board (FCB) providing capacitance compensation, offset from the signal path, and a rigid PCB for secondary compensation, which minimizes phase shift and cancels out plug inductance and capacitance, ensuring Near End Cross Talk compensation across a wide spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional modular connectors are used for high-speed Ethernet transmission, then mechanical coupling and basic electrical connection are achieved, but signal degradation occurs due to phase shift and unwanted electromagnetic signal interaction
Solution Approach 1:
The patent applies preliminary anti-action by placing compensation circuits that generate opposite-polarity electromagnetic signals before the main signal transmission. These pre-positioned compensation circuits at the jack interface create counteracting fields that neutralize the harmful phase shifts and electromagnetic interactions before they can degrade the transmitted signals, thereby ensuring error-free transmission across wide frequency ranges.
2Reliability
If compensation circuits are placed at the tips of contacts, then some capacitance compensation is achieved, but the electrical length between contact point and compensation is too great causing unpredictable phase shift
Solution Approach 1:
The patent applies local quality by concentrating the compensation circuits directly at the contact tips where the electrical connection is made. This localized placement ensures that the compensation occurs at the precise location needed, minimizing the electrical length between the contact point and the compensation circuit. The compensation circuits are integrated into the contact structure itself, providing both capacitance compensation and controlled phase characteristics in a single localized element.
3Reliability
If jack compensation board adds capacitance at contact tips, then plug inductance and capacitance compensation is attempted, but the electrical length is too great to completely cancel the plug inductance and capacitance in both phase and magnitude
Solution Approach 1:
The patent applies merging by combining the compensation circuits with the contact structure itself, integrating the capacitance compensation elements directly into the contact tips. This merger eliminates the separate compensation board and its associated electrical length, creating a unified structure where the compensation function is inherent to the contact assembly. The integrated design ensures minimal electrical length while providing both capacitance and inductance compensation.
4Adaptability or versatility
If modular connectors are designed for older Ethernet speeds, then compatibility with legacy equipment is maintained, but newer high-speed equipment is forced to run below its intended speed
Solution Approach 1:
The patent applies universality by designing a modular jack connector that performs multiple functions across different frequency ranges. The connector incorporates compensation circuits and signal path designs that effectively handle both legacy Ethernet speeds and modern high-speed protocols (10, 25, 40, and 100 Gigabit Ethernet). This multi-functional design allows the same connector to maintain compatibility with older equipment while simultaneously supporting the full performance capability of newer high-speed equipment.
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 design enables reliable, error-free transmission across a wide frequency range (10 to 2000 MHz) without degrading performance, supporting both low-speed and high-speed equipment, while being cost-effective and easy to manufacture.
Implementation Method 1
A flexible circuit board (FCB) providing capacitance compensation, offset from the signal path
Implementation Method 2
minimizes phase shift and cancels out plug inductance and capacitance
Implementation Method 3
cancels out plug inductance and capacitance
Implementation Method 4
ensuring Near End Cross Talk compensation across a wide spectrum
Data Source
AI summary
A modular jack connector compensates for plug characteristics via a controlled primary compensation in the immediate vicinity of the connector interface. A jack contact assembly is positioned within a jack housing and includes first and second sets of elongate contacts each having a plug contact portion and a signal output portion. Each elongate contact is configured such that their respective plug contact portions are coplanar and a signal path is defined between their plug contact portions and their signal output portions. A flexible circuit board is coupled proximate to the plug contact portions, and configured to provide capacitance compensation between respective contacts engaged thereby, wherein the capacitance compensation is offset from a signal path defined between the plug contact portions and the corresponding signal output portions.