High Speed Connector Double-Sided 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.
Innovation Solution
A high-speed connector assembly design featuring a receptacle connector with multiple terminal modules, each containing differential signal terminals with L-type arms forming resilient contact fingers that establish double-sided contact with plug terminals, reducing crosstalk and signal loss by staggered and unequal L-type arms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-sided contact connector design is used, then the device complexity is low, but signal loss and crosstalk increase at high speeds
Solution Approach 1:
The contact structure is segmented into two separate resilient contact fingers (first and second) that contact opposite sides of the plug terminal independently. This segmentation allows each finger to be optimized for its specific contact side, improving signal integrity while maintaining manageable complexity through modular design
Solution Approach 2:
The invention transitions from single-sided contact to double-sided contact by utilizing both sides of the plug terminal. This dimensional change in contact approach effectively doubles the contact interface, reducing crosstalk and signal loss without proportionally increasing overall device complexity
2Reliability
If unequal L-type arms with staggered resilient contact fingers are used, then crosstalk and signal loss are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The L-type arms are designed with unequal dimensions, creating an asymmetric structure where the first and second resilient contact fingers are positioned at different locations. This asymmetry is deliberately engineered to optimize contact geometry and reduce crosstalk, with manufacturing processes designed to accommodate these specific asymmetric requirements
Solution Approach 2:
Different regions of the contact structure have different geometric properties - the first resilient contact finger has different dimensions and positioning than the second resilient contact finger. This local variation in quality is optimized for its specific function of contacting one side of the plug terminal, improving overall signal integrity
3Productivity
If double-sided contact is implemented, then throughput and signal transmission stability are improved, but the contact structure complexity increases
Solution Approach 1:
The receptacle terminal combines multiple contact functions into a single integrated structure that houses both resilient contact fingers within one terminal body. This merging approach enables double-sided contact capability while avoiding the complexity of using two separate terminal components, thus improving throughput without proportionally increasing device complexity
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 design effectively reduces signal loss and crosstalk, ensuring reliable transmission rates greater than 25 Gbps to 40 Gbps by forming stable double-sided contacts between receptacle and plug terminals.
Implementation Method 1
each of which forms a resilient contact finger located on the front of the arm and 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. Each differential signal terminal of the receptacle connector has an L-type body, a front mating portion and a bottom mounting portion. The front mating portion includes two L-type arms having unequal length. A front end of each L-type arm disposes a resilient contact finger being perpendicular to a vertical plane. The resilient contact fingers of the two L-type arms can respectively and electrically contact with two opposite sides of one plug terminal of the plug connector, thereby forming double-sided contact. The present invention can suppress the short pile effect and reduce signal crosstalk and signal loss during transmitting the high speed signal by this double contact.