Connector Stub Resonance Mitigation via Varying Width Design
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Solution Overview
Problem
Connector stubs in high-speed signal transmission systems cause resonance at specific frequencies, limiting data rates due to their constant width design, which results in adverse effects on signal integrity and bandwidth.
Innovation Solution
The connector stub is redesigned with varying widths, shifting the resonant frequency higher by altering the input impedance and maintaining equal or reduced total capacitance and area compared to the original design, achieving a low-then-high impedance structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connector stub uses a constant-width design, then the mechanical reliability is maintained, but the resonant frequency remains low causing signal integrity degradation at high speeds
Solution Approach 1:
The connector stub is designed with non-uniform width distribution, where different sections have different widths. The first section has a larger width while the second section has a smaller width, creating local impedance variations that shift the resonant frequency higher and reduce the harmful resonance effect on signal transmission.
2Object-affected harmful factors
If the connector stub is redesigned with varying widths to shift resonant frequency higher, then the signal integrity is improved, but the total capacitance and area may increase
Solution Approach 1:
The design optimizes the width parameters of different sections to achieve a balance between shifting resonant frequency and controlling total capacitance. By carefully selecting the width ratios and lengths of the first and second sections, the resonant frequency is shifted higher while keeping the total capacitance within acceptable limits.
3Object-affected harmful factors
If the connector stub uses a varying-width design, then the resonant frequency is shifted higher, but the manufacturing complexity increases
Solution Approach 1:
The connector stub is divided into two distinct sections with different widths. The first section has a larger width and the second section has a smaller width, creating a stepped or tapered structure. This segmentation approach simplifies the manufacturing process compared to continuous variable width designs, as it can be implemented using standard PCB fabrication techniques or molding 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
This redesign mitigates resonance issues, allowing higher frequency transmission while maintaining signal integrity and reducing insertion loss, thereby enhancing system performance.
Implementation Method 1
shifting the resonant frequency higher by altering the input impedance
Implementation Method 2
The total capacitance of the new varying-width stub design is made to be no larger than the total capacitance of original constant-width stub design
Data Source
AI summary
Example implementations described herein are directed to a method and apparatus for improving insertion loss of connector stub and thereby increasing a system's signal bandwidth. This technique shapes the connector stub in a specific way to shift its resonant frequency higher while having equal or better electrical performance below the original resonant frequency.