High-Speed Connector Core Structure for 112 Gbps Signal Integrity
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Solution Overview
Problem
Current electrical connectors face challenges in handling high-speed, high-density data transmission due to electrical interference and resonance issues, which affect signal integrity and frequency range, especially at frequencies above 112 Gbps.
Innovation Solution
The design incorporates conductive shielding with lossy material at strategic locations, compressible mounting interface shielding, and two-sided shielding throughout the signal path to reduce cross-talk and resonance, along with a core member formed by a two-shot process using lossy and insulative materials to enhance signal integrity and frequency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrical conductors are placed close to each other to increase density, then the connector can handle more data, but electrical interference and crosstalk between adjacent signal conductors increases
Solution Approach 1:
Ground conductors are placed between adjacent signal conductors to act as intermediaries that block electrical interference and crosstalk. The ground conductors serve as a shield that prevents signals from one conductor from interfering with adjacent conductors, enabling higher density arrangements while maintaining signal integrity.
Solution Approach 2:
The connector uses alternating patterns of signal and ground conductors where ground conductors are strategically positioned only where needed to shield specific signal conductors. This local arrangement of different conductor types optimizes shielding effectiveness while maintaining high density signal transmission capability.
2Object-affected harmful factors
If shield members are placed between signal conductors to reduce interference, then crosstalk is reduced, but the impedance of conductors is affected and device complexity increases
Solution Approach 1:
Signal and ground conductors are merged into a single integrated connector structure where both types of conductors coexist in an alternating pattern. This unified design provides shielding functionality without requiring separate shield members, reducing overall device complexity while maintaining effective crosstalk reduction.
Solution Approach 2:
The ground conductors serve multiple functions simultaneously: they act as shields to reduce crosstalk, provide reference planes for impedance control, and enable high-density signal routing. This multi-functionality eliminates the need for dedicated shield members, simplifying the overall connector design.
3Productivity
If the number of circuits in a given area is increased to handle more data, then data transmission capacity increases, but electrical interference between conductors worsens
Solution Approach 1:
The connector is segmented into alternating columns of signal conductors and ground conductors. This segmentation creates natural shielding zones where ground conductors divide and isolate signal conductor groups, enabling high circuit density while maintaining low interference levels through systematic spatial division.
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 effectively isolates signal conductors, reduces crosstalk, and increases the frequency range of the connector, supporting high-speed data transmission up to 112 Gbps and beyond with improved signal integrity.
Implementation Method 1
The core member includes lossy material to reduce resonance and crosstalk
Data Source
AI summary
Electrical connectors for very high speed signals, including signals at or above 112 Gbps. Effectiveness of shielding along the signal paths through the mating electrical connectors may be enhanced through the use of one or more techniques, including enabling two-sided shielding, connections between shield members and between shield members and grounded structures of printed circuit boards to which the connectors are mounted, and selective positioning of lossy material. Such techniques may be simply and reliably implemented in high density connector using one or more techniques. An electrical connector may include core members held by a housing together with leadframe assemblies attached to the core members. The core members may include features that would be difficult to mold in a housing and may include both shields and lossy materials in locations that would be difficult to incorporate in a leadframe assembly.