Connector Conductive Layer for Mating Interface Impedance Matching
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Solution Overview
Problem
Maintaining target impedance in mating connectors is difficult due to high impedance conditions caused by reduced diameters of pin contacts, leading to signal wave reflection and poor performance.
Innovation Solution
Incorporating a conductive layer on or within the dielectric of the connector, electrically isolated from inner contacts, to improve impedance at the mating interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pin contact diameter is reduced to fit in the socket contact, then the inner contacts can be connected, but the reduced diameter creates high impedance condition causing signal wave reflection
Solution Approach 1:
A conductive layer is introduced as an intermediary element between the inner contact and the mating interface. This conductive layer, disposed on or within the mating face of the dielectric and electrically isolated from the inner contact, serves as a mediator to adjust the impedance characteristics at the mating interface without requiring changes to the inner contact geometry, thereby resolving the impedance control issue while maintaining connection reliability
Solution Approach 2:
The impedance characteristics at the mating interface are adjusted by modifying the parameters of the conductive layer, such as its conductivity, thickness, and positioning. By changing these parameters, the characteristic impedance can be optimized to match the target impedance, reducing signal wave reflection without altering the pin contact diameter
2Ease of operation
If the pin contact diameter is reduced, then the inner contacts can be mated, but it causes poor connector performance due to impedance mismatch
Solution Approach 1:
The conductive layer acts as an intermediary that compensates for the impedance mismatch caused by the reduced pin contact diameter. It is positioned at the mating face to interact with the mating connector, providing impedance transformation or matching that improves signal transmission quality while allowing the reduced-diameter pin contact to mate easily with the socket contact
Data Source
AI summary
A connector includes a dielectric having a mating face, an inner contact disposed in the dielectric, and a conductive layer disposed on or within the mating face. The conductive layer is electrically isolated from the inner contact.