Trapezoidal Connector Terminal Array for Crosstalk Reduction
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Solution Overview
Problem
Conventional connectors face challenges in differential signal transmission due to difficulties in impedance matching, high crosstalk, and space inefficiency, particularly when arranging signal and ground terminals in a way that maintains optimal transmission quality and reduces the number of contacts.
Innovation Solution
The connector design features signal and ground terminals arranged in parallel rows on the terminal side, with signal terminals forming pairs between spaces created by ground terminals, forming a trapezoidal array configuration that maintains consistent cross-sections and reduces unnecessary contacts, thereby improving transmission quality and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If contacts are arranged in one row on the fitting side to maintain same cross-sections in differential pairs, then transmission characteristics are consistent, but signal terminals approach each other causing large crosstalk
Solution Approach 1:
The patent transitions from a one-row arrangement to a two-dimensional arrangement where signal terminals and ground terminals are separated into different rows. This dimensional change allows signal terminals forming differential pairs to face spaces between ground terminals, maintaining consistent cross-sections while increasing spacing between signal terminals to reduce crosstalk.
2Area of stationary object
If ground terminals are arranged closely to reduce space, then area is saved, but transmission quality deteriorates due to insufficient spacing
Solution Approach 1:
The patent applies different arrangement patterns to different terminal types: ground terminals are arranged with spaces between them in one row, while signal terminals forming differential pairs are arranged in parallel rows facing these spaces. This local differentiation optimizes both space utilization and transmission quality by providing appropriate spacing where needed while maintaining compact overall structure.
3Area of stationary object
If zigzag arrangement is used on terminal side to save space, then mounting space is reduced, but transmission performance deteriorates due to varying cross-sections
Solution Approach 1:
The patent employs asymmetric arrangement where ground terminals are positioned in one row with spaces between them, while signal terminals are arranged in parallel rows facing these spaces. This asymmetric configuration maintains consistent cross-sections for differential pairs while achieving compact space utilization, avoiding the performance degradation associated with symmetric zigzag arrangements.
Data Source
AI summary
In a connector adapted to be mounted on a connection object for connection to a mating connector, the connector includes contacts each of which has a contact portion placed on a contact portion side of the connector for connection to the mating connector and a terminal portion placed on a terminal portion side for connection to the connection object. The contacts have a plurality of signal contact members and a plurality of ground contact members. The signal contact members make a plurality of pairs. The ground contact members are arranged with spaces left therebetween. On the contact portion side, the pairs of the signal contact members are placed in the spaces, respectively. On the terminal portion side, the signal contact members and the ground contact members are separately arranged on parallel rows and the pairs of the signal contact members face the spaces, respectively.