Electrical Cable Partial Stripping for Crosstalk Reduction
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Solution Overview
Problem
Conventional methods of stripping electrical cables to connect them to circuit boards result in increased crosstalk and impedance mismatch, degrading signal transmission performance and leading to higher return loss and lower bandwidth.
Innovation Solution
Partial removal of insulation and shielding from one side of the cable end, allowing the inner conductor to be exposed in a controlled manner to maintain alignment and reduce crosstalk, while using a razor blade to cut at a shallow angle to avoid cutting into the conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entire end portion of the cable is stripped of insulation and shielding materials, then the conductors can be fully exposed for bonding with the circuit board, but crosstalk and impedance mismatch increase, degrading signal transmission performance
Solution Approach 1:
The stripping process is segmented into two distinct portions: a first portion where insulation and shielding are removed to expose conductors for bonding, and a second portion where insulation and shielding are retained to maintain signal integrity. This segmentation allows the cable end to serve dual functions - connection accessibility and signal protection.
Solution Approach 2:
Different regions of the cable end are given different properties: the first portion (exposed conductors) is optimized for electrical connection, while the second portion (retained insulation and shielding) is optimized for electromagnetic shielding and impedance control. This local differentiation resolves the contradiction between connection ease and signal quality.
2Ease of operation
If insulation and shielding are completely removed from the cable end, then conductor accessibility is improved, but signal transmission performance deteriorates due to increased return loss and reduced bandwidth
Solution Approach 1:
The cable end is divided into two functional zones: an exposed first portion for conductor accessibility and a shielded second portion for maintaining impedance and reducing return loss. This segmentation enables both conductor accessibility and signal transmission reliability to be optimized simultaneously.
Solution Approach 2:
The solution extends the protective function of insulation and shielding from a single-point termination to a extended region along the cable length. By retaining insulation and shielding in the second portion, the protective function is extended into the dimensional space adjacent to the connection point, maintaining signal integrity without compromising accessibility.
3Ease of manufacture
If the cable is fully stripped for connection, then bonding with circuit board is simplified, but bandwidth and data rate are reduced
Solution Approach 1:
The manufacturing process is segmented into two stages: exposing the first portion for simplified bonding operations, and retaining the second portion to maintain impedance control and reduce return loss during high-speed signal transmission. This segmentation enables both bonding simplicity and high bandwidth performance.
Solution Approach 2:
The cable structure implements local quality differentiation where the exposed first portion facilitates manufacturing bonding, while the shielded second portion maintains electromagnetic properties necessary for high bandwidth and data rate transmission.
Data Source
AI summary
An electrical cable (1000) including a plurality of substantially parallel insulated conductors (100) is described. Each insulated conductor (100) includes an electrically conductive inner conductor (200) co-extensive and covered with an insulating layer (300). At least a portion of a periphery of each insulated conductor (100) may be encompassed by a substantially co-extensive electrically conductive shield (400). For each insulated conductor (100), portions of the insulating layer (300) are removed from the top side (1200) of the cable (1000) to expose a portion of the inner conductor (200) of the insulated conductor (100). The insulated conductor (100) is adapted to mate with an electrically conductive mating conductor (500) at the exposed portion (210) of the inner conductor (200).