Differential Signal Cable Evaluation Mechanism Without Solder
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Solution Overview
Problem
The existing mechanisms for evaluating the properties of differential signal transmission cables face challenges due to impedance mismatches caused by solder connections, which distort the signal and prevent accurate measurement of the cable's pure properties.
Innovation Solution
A differential signal transmission cable property evaluating mechanism that uses a substrate with signal and ground pads, a pressing member to connect the signal line conductor, and an elastic insulating sheet with a metal foil to connect the shield conductor to the ground pad, reducing impedance mismatch and allowing for pure property evaluation without soldering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solder connection is used to connect the cable terminal to the connector, then electrical connection is achieved, but impedance mismatch occurs due to insulator deformation and signal line bending, causing signal reflection and measurement distortion
Solution Approach 1:
The patent removes the solder connection process entirely from the evaluation mechanism. Instead of using solder to connect the cable terminal to the connector, the invention uses a specialized evaluation mechanism that directly receives the cable terminal without soldering, thereby eliminating the source of impedance mismatch and measurement distortion while maintaining reliable electrical connection for accurate cable property evaluation
Solution Approach 2:
The patent introduces an intermediary evaluation mechanism structure that mediates between the cable terminal and the measurement instrument. This intermediary mechanism includes a receptacle with positioning structures and contact elements that provide a controlled impedance environment, acting as a buffer that prevents the cable's natural properties from being distorted by direct solder connection to standard connectors
2Ease of manufacture
If rated connector with solder connection is used, then cable terminal can be connected, but the pure property of the differential signal transmission cable cannot be shown due to impedance mismatch and signal reflection
Solution Approach 1:
The patent performs preliminary action by designing the evaluation mechanism to accommodate the cable terminal in its natural state before any soldering or connector attachment occurs. The mechanism includes pre-configured positioning structures and contact elements that establish reliable electrical connection without requiring solder connection, thereby preserving the cable's pure properties for accurate evaluation
Solution Approach 2:
The patent extracts the solder connection step from the cable assembly process in the context of property evaluation. By separating the evaluation function from the permanent assembly function, the invention allows cable properties to be measured in their pure state without the distorting effects of solder-induced impedance mismatch, while still enabling easy connection and disconnection for manufacturing efficiency
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 approach minimizes impedance mismatch at the terminal, enabling accurate evaluation of the differential signal transmission cable's properties by reducing signal reflection and distortion, thus providing a reliable and reproducible method for assessing high-speed transmission cables.
Implementation Method 1
a shield conductor holding sheet comprising an elastic insulating sheet and a metal foil provided over one side of the elastic insulating sheet, the shield conductor holding sheet provided for indirectly connecting the shield conductor and the ground pad to each other by contacting the metal foil with the shield conductor and the ground pad
Data Source
AI summary
A differential signal transmission cable property evaluating mechanism includes a substrate having a signal line pad to be connected with a signal line conductor of a differential signal transmission cable and a ground pad to be connected with a shield conductor of the differential signal transmission cable, a pressing member for pressing the signal line conductor to the signal line pad, a shield conductor holding sheet including an elastic insulating sheet and a metal foil provided over one side of the elastic insulating sheet, the shield conductor holding sheet provided for indirectly connecting the shield conductor and the ground pad to each other by contacting the metal foil with the shield conductor and the ground pad, and a clip for fixing the shield conductor holding sheet.


