High-Bandwidth Connector With Nested Shielding For Signal Integrity
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Solution Overview
Problem
High-speed digital signal connectors used in electronic circuits face challenges in maintaining signal quality and protecting against electromagnetic interference while ensuring constant impedance in high-speed data transmission, which existing connectors often fail to address effectively.
Innovation Solution
A connector design featuring two parallel pins, an insulating insert, a metal casing with a D-shaped sleeve, and shielded coaxial cables with a central core and braid, which are directly mounted on a printed circuit board, ensuring minimal impedance variation and effective electromagnetic compatibility through secure cable immobilization and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a connector is mounted directly on a printed circuit board for high-speed signal transmission, then signal transmission speed and data rate are improved, but electromagnetic interference and signal quality degradation increase
Solution Approach 1:
The connector employs a nested shielding structure where an inner conductive shield surrounds the signal pins, which is in turn surrounded by an outer conductive shield. This multi-layer nesting provides progressive electromagnetic protection, allowing high-speed signal transmission while minimizing interference from both internal and external sources.
Solution Approach 2:
The connector introduces intermediate shielding elements (inner and outer conductive shields) between the signal transmission path and the external environment. These intermediary shields act as electromagnetic barriers that protect the high-speed signals while allowing the connector to be directly mounted on the circuit board.
2Reliability
If a connector is mounted directly on a printed circuit board, then connection reliability and signal integrity are improved, but impedance matching becomes more difficult to maintain
Solution Approach 1:
The connector features localized impedance control through specifically designed shield structures and pin configurations. The inner and outer shields are positioned and dimensioned to create controlled impedance zones around the signal paths, ensuring proper impedance matching at the critical connection point while allowing flexibility in the overall connector design.
3Object-affected harmful factors
If shielded cables are used for high-speed connections, then electromagnetic protection is improved, but cable flexibility and ease of installation deteriorate
Solution Approach 1:
The shielding structure is segmented into distinct inner and outer conductive shields, each serving specific protection functions. This segmentation allows the shields to be optimized independently - the inner shield provides close-proximity protection with minimal impact on flexibility, while the outer shield handles external interference, collectively providing comprehensive protection without excessive rigidity.
Data Source
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AI summary
The invention concerns a high rate dual-wire connector capable of being directly mounted on a printed circuit. The connector comprises two parallel pins (29), an insulating insert (31) in which the pins are mounted, a metal housing (33) associated with mounting means for fixing it on a printed circuit and two shielded connecting cables (20), each connected to one pin.