High Speed Connector Assembly Double Contact Signal Integrity
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Solution Overview
Problem
Existing high-speed connector assemblies face challenges in maintaining stable and reliable signal transmission at high speeds due to issues like short pile effect and crosstalk, particularly when connecting orthogonal circuit boards, which affects signal integrity and throughput.
Innovation Solution
A high-speed connector assembly design featuring a receptacle connector with multiple terminal modules, each including differential signal and grounding terminals with L-type and finger-shaped spring contacts that form double contacts with plug terminals, reducing crosstalk and signal loss by engaging with different surfaces of the plug terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single-contact connector design is used, then the structure is simple, but the signal transmission suffers from short pile effect, crosstalk and loss at high speeds
Solution Approach 1:
The contact structure is segmented into two separate contact surfaces: a first contact surface and a second contact surface. This segmentation allows the single terminal to form multiple contact points with the plug terminal, reducing the short pile effect and crosstalk while maintaining structural organization through the insulating frame that holds both contact surfaces in defined positions.
2Speed
If the transmission speed is increased beyond 25 Gbps, then the throughput is improved, but the signal loss and crosstalk increase significantly
Solution Approach 1:
The contact interface transitions from a single-point contact to a multi-surface contact by utilizing both a first contact surface and a second contact surface that extend in different directions. This dimensional expansion of the contact interface distributes the electrical connection across multiple points, reducing signal loss and crosstalk at high transmission speeds above 25 Gbps.
3Reliability
If a double contact design is implemented, then the crosstalk and signal loss are reduced, but the manufacturing complexity increases
Solution Approach 1:
The first contact surface and second contact surface are integrated into a single terminal structure mounted on the insulating frame. This merging approach allows the double contact functionality to be achieved without requiring separate components, simplifying the manufacturing process while still providing the signal integrity benefits of multiple contact surfaces.
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 design effectively reduces crosstalk and signal loss, ensuring reliable transmission rates greater than 25 Gbps to 40 Gbps by forming double contacts between receptacle and plug terminals, thereby enhancing signal integrity and throughput without requiring redesign of the connection interface.
Implementation Method 1
The front mating portion includes a finger-shaped spring extending forward and an L-type contact piece extending forward. The finger-shaped spring has a convex portion being perpendicular to the vertical plane, and the L-type contact piece has a horizontal extension portion being perpendicular to the vertical plane.
Data Source
AI summary
A high speed connector assembly is disclosed in this invention, which includes a receptacle connector and a plug connector. The receptacle connector at least includes an insulating cover and multiple terminal modules being arranged in parallel and retained in the insulating cover. Each differential signal terminal has an L-type base, a front mating portion and a bottom mounting portion. The front mating portion includes a finger-shaped spring and an L-type contact piece. When the receptacle connector and the plug connector are engaged, the finger-shaped spring and the L-type contact piece can respectively and electrically contact with two different surfaces of one plug terminal to form double contacts. The double contacts can suppress the short pile effect and reduce signal crosstalk and signal loss during transmitting the high speed signal.