Shielded Connector Channel With Conductive Insert
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Solution Overview
Problem
Current connectors face challenges in maintaining signal integrity at high data rates exceeding 50 Gbps, particularly due to signaling frequencies above 25 GHz, which are insufficient for detecting small amplitude variations, necessitating improved designs for higher frequencies.
Innovation Solution
The connector design features a wafer configuration with insulative frames supporting differentially coupled terminals, a shielded structure with a conductive insert for enhanced shielding between signal pairs, and an isolation shield to improve signal integrity and reduce crosstalk, enabling support for higher data rates like 100 Gbps using PAM4 encoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If signaling frequency is increased to support 50-100 Gbps data rates, then data rate capability is improved, but signal integrity deteriorates due to small amplitude variations being difficult to detect
Solution Approach 1:
A conductive insert is introduced as an intermediary shielding element positioned between adjacent differential pairs. This insert acts as a mediator to block electromagnetic interference and crosstalk, thereby improving signal integrity without compromising the high data rate capability. The conductive insert is electrically connected to the shield, creating an additional layer of protection for the signal paths.
Solution Approach 2:
The shielding structure is segmented into multiple components: an outer shield and internal conductive inserts positioned between specific differential pairs. This segmentation allows targeted shielding where needed most, providing enhanced signal integrity for high-frequency signals while maintaining the overall connector structure. Each segment addresses specific interference patterns generated by adjacent signal pairs.
2Reliability
If shield structure is added to reduce crosstalk, then signal integrity is improved, but device complexity increases
Solution Approach 1:
The conductive inserts are nested within the connector body, positioned in cavities between differential pairs. These inserts are integrated into the existing shield structure, with the outer shield encompassing the entire wafer and the conductive inserts nested within specific regions. This nesting approach provides enhanced shielding without significantly increasing overall device complexity, as the inserts fit within existing structural spaces.
Solution Approach 2:
Rather than providing uniform shielding across all signal pairs, conductive inserts are selectively positioned only between specific differential pairs that require additional shielding. This local quality approach applies enhanced shielding measures precisely where crosstalk is most problematic, optimizing signal integrity while minimizing the addition of structural complexity throughout the entire connector.
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
The enhanced shielding and configuration significantly improve signal integrity, reducing crosstalk noise and insertion loss, making the connector suitable for 100-112 Gbps data rates by providing additional shielding and flexibility in high-speed signaling applications.
Implementation Method 1
A conductive insert can be mounted over the third pair to help provide additional shielding between the first and second pair. The conductive insert is at least partially conductive and is electrically connected to at least one of the shield and the isolation shield.
Data Source
AI summary
A connector system includes a wafer that has a shield that replaces standard ground terminals and an additional isolation shield to provide enhanced electrical isolation. To further improve electrical performance, transmit and receive channels can be provided in separate wafers on one side of connector system with a space or wafer between the transmit and signal wafers. On the other side of the connector system the wafer will have one or two spaces that are either black or filled with terminals that operate at lower frequencies. A conductive insert can provide further isolation intra-wafer.