Twinax Cable Assembly Layout for Impedance-Stable Connector Mating
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Solution Overview
Problem
Existing cable connectors face challenges in maintaining signal transmission quality due to shape changes and impedance mismatch when connecting twinax cables, leading to signal degradation and noise interference.
Innovation Solution
A cable assembly with specific regions for exposure and coverage of transmission conductors, outer conductors, and a sheath structure, along with a connector system that includes conductive contacts and shells, ensures proper alignment and electrical connection to prevent deformation and impedance mismatch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sheath and outer conductor are removed to expose transmission conductors for connection, then electrical connection is enabled, but the cable structure becomes vulnerable to deformation and impedance mismatch
Solution Approach 1:
The cable is divided into three distinct regions (first region with exposed conductors for connection, second region with partial sheath removal for grounding, third region with complete sheath coverage for protection), allowing simultaneous achievement of connection capability and structural integrity
Solution Approach 2:
Different portions of the cable have different sheath configurations tailored to their specific functions: the first region has complete removal for electrical connection, the second region has partial removal for grounding while maintaining some protection, and the third region has complete coverage for signal protection
2Ease of operation
If the outer conductor is exposed by peeling the outer cover, then connector connection is possible, but shape changes and impedance mismatch occur leading to signal degradation
Solution Approach 1:
The cable is pre-configured with three regions during manufacturing, with the first region having sheath and outer conductor removed and the second region having selective sheath removal, so that when the connector is connected, the conductors are already in the correct state for connection without requiring additional field modifications that could cause deformation
3Ease of operation
If the sheath is completely removed for connection, then electrical access is achieved, but the cable loses structural protection and shielding
Solution Approach 1:
The cable is segmented into three regions with different sheath configurations, allowing the first region to have complete sheath removal for electrical access while the third region maintains complete sheath coverage for protection, and the second region provides intermediate protection with partial sheath removal
Solution Approach 2:
The second region acts as an intermediary transition zone between the fully exposed first region and the fully protected third region, providing gradual protection while enabling grounding connection, thus maintaining structural integrity during the transition from connection to protected transmission
Data Source
AI summary
A cable assembly includes: a pair of transmission conductors; a dielectric covering the pair of transmission conductors; an outer conductor covering a surface of the dielectric; and a sheath covering the outer conductor, wherein the cable includes a first region, a second region, and a third region sequentially aligned from a tip of the cable, wherein in the first region, the pair of transmission conductors are exposed, wherein the second region includes: a connecting portion in which the outer conductor is exposed; and a non-connecting portion covered by the sheath, wherein in the third region, the outer conductor is covered with the sheath entirely over a circumference of the cable, wherein the connector includes: a pair of conductive contacts electrically connected to the pair of transmission conductors; and a conductive shell surrounding the pair of conductive contacts and electrically connected to the connecting portion.